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This study's focus was to develop a potential pathway for recycling of the paper mill sludge compost (PMSC) in brick making. Composting reduces the paper mill sludge (PMS) moisture content considerably and shredding becomes easier. The addition of PMSC leads to an increase of porosities in bricks and makes them lighter, besides delivering energy to the firing process from burning organics. Lighter construction materials help minimize construction outlay by reducing labour and transportation costs and lesser expense on foundation construction. The variability in the experimental data and the brick properties were investigated for two types of soils, typical in the brick industry of India (alluvial and laterite soil), blended with PMSC in five mix ratios (0%, 5%, 10%, 15% and 20%). The samples of oven-dried bricks were fired at two different temperatures (850 and 900 °C) in an electrically operated muffle furnace representing typical conditions of a brick kiln. Various properties of bricks were analyzed which included linear shrinkage, bulk density, water absorption and compressive strength. Conclusions were drawn based on these properties. It was found that the addition of PMSC to the alluvial and laterite soil by up to 10% weight yield mechanical properties of fired bricks compliant with the relevant Indian and ASTM codes. Toxicity characteristic leaching procedure (TCLP) tests showed that PMSC incorporated fired bricks are safe to use in regular applications as non-load-bearing and infill walls. This study is timely in light of the European Green Deal putting focus on circular economy. Besides, it fulfills the objective of UN sustainable development goals (SDG). © 2021 Elsevier Ltd

Enzyme use has provided boost to the technoeconomics of many industrial processes. In this chapter, we summarize different cellulase-based industrial processes for preparation of paper, pulp, brewing products, and different foods. This review presents a brief chemistry and mechanism of cellulose degradation by the cellulase enzyme. Also, cellulase production abilities of many microbial species have been addressed in this chapter. Cellulase plays a major role in production of good-quality paper and pulp. It’s used to debark the biomass and to remove lignocellulosic part. This enzyme also has application in recycling of used paper by deinking and biobleaching. Cellulase enhances freeness and drainage ability of the fibers without compromising the brightness of the fibers. In brewing industry, cellulase in combination of other enzymes is used to extract the more sugar for better-quality alcohol production. Cellulases have a wide range of potential applications in food and beverage processing, production of fruit and vegetable juices, and improvement of methods for extraction, clarification, and stabilization.

With the objective to obtain more sustainable production processes, the biorefinery network is integrated with traditional pulp and paper industries. A systematic framework with computer-aided tools consisting of synthesis, design and innovation stages has been applied to determine the biorefinery-integrated pulping process. An integrated network of succinic acid production and black liquor gasification for dimethyl ether (DME) production linked to an existing Soda pulping process is identified as the best option for increased profit, which also reduces pollutant emissions through integration of innovative CO2 capture and utilization (CCU) steps to form the biorefinery-integrated-Soda-pulping network (BIS). This paper aims at also designing a sustainable biorefinery-integrated-Kraft-pulping network (BIK). Three integration scenarios are considered for further study: (I) the production of gasification-based dimethyl ether (DME); (II) the coproduction of DME and succinic acid (SA); and (III) the co-production of DME and SA coupled with CCU. The best scenario is found to be Scenario II, which exhibits the best economic performance with 74% increase in profit compared to the conventional process. Scenario III achieves the highest energy efficiency at 39% and improved environmental performance, a 65% reduction of CO2 emission compared to the conventional process, with only 0.7% profit reduction. The BIK option shows improved performance in terms of economic and environmental improvements compared to the BIS network, confirming that the integrated biorefinery network can transform the conventional Kraft pulping process to a more sustainable process with increased profit.

In the present manuscript, novel effluent treatment processes for pulp and paper mill effluents are divided into two categories: a) those involving the use of chemical additives and b) those which are free of such chemicals. It is especially of high importance for pulp and paper industry to adopt the most efficient and cost-effective treatment methods. This paper critically reviews the recent studies on the treatment of pulp and paper mill effluents while providing suggestions for further studies on the application of various physic-chemical and biological methods for the treatment of such complex effluents containing a number of recalcitrant pollutants. Keywords: Pulp and paper industry, Industrial effluents, Chemical additives, Non-additive treatment processes

This chapter highlights the importance of anaerobic digestion in pulp and paper mill waste (PPMW) treatment. Due to increasing environmental concerns and strict laws about the effluents from industries, it becomes imperative to use such a technology. PPMW contains a vast amount of organic contaminants that are recalcitrant. Postaerobic treatment, a considerable amount of sludge is generated, and to cope up with this, anaerobic digestion, which results in much-reduced sludge volumes, is one of the best methods. Anaerobic digestion of PPMW offers additional benefits through the generation of renewable value-added bioproducts such as biogas, biomethane, biohydrogen, and biofertilizer, along with the treatment of waste. The present chapter describes the importance of anaerobic treatment of PPMW for both sludge and wastewater and the simultaneous generation of value-added products. In the end, the various challenges associated with anaerobic treatment and their mitigation strategies are also discussed.

The performance of an amine-based post-combustion CO2 capture and storage (CCS) process in an existing Kraft pulp mill and an existing pulp and board mill was assessed. The pulp and paper industry is an energy-intensive industry, with significant amounts of CO2 emitted onsite. The majority of this CO2 originates from the combustion of biomass, which renders it carbon neutral if the biomass used by the industry is grown and harvested in a sustainable manner. If the CO2 emissions from the pulp and paper industry were to be captured and permanently stored, then this could make the industry a potential carbon sink. In this evaluation, different configurations of capturing CO2 from the flue gases of the recovery boiler, the multi-fuel boiler and the lime kiln were assessed. For a stand-alone Kraft pulp mill, the excess steam available is sufficient to cover the demand from the CO2 capture plant. For an integrated pulp and board mill, there is less excess steam available for the CO2 capture plant and an auxiliary boiler may be required. The retrofit of a post-combustion CO2 capture plant into an existing pulp mill increases the steam demand by 1-8 GJ/air dried tonne (adt) pulp, depending on the volume of the flue gas treated. This translates to a reduction in the amount of electricity exported to the grid by 0.1-1.0 MWh/adt pulp for a stand-alone Kraft pulp mill, and by 0.1-0.5 MWh/adt pulp for an integrated pulp and board mill. The total potential for negative CO2 emissions amounts to just under 2.0 Mt CO2/a both for the market pulp mill and for the integrated pulp and board mill.

The process of bioconversion of solid organic wastes through vermicomposting justifies the environmental message for sustainability such as reduce, recycle and reuse of wastes. In the present study, wastes derived from two different types of paper mill sludge (primary and secondary), was used for their bioconversion through the vermicomposting process using an indigenous species of earthworm (Perionyx excavatus). The maturity and stability stage of vermicompost production was assessed using FT-IR, GC-MS and TG analyses. During vermicomposting, different biochemical functional groups present in the wastes have shown differential chemical alteration and turnover as revealed by FT-IR spectroscopy. This study has also confirmed the trend of biodegradation of complex substances like lignin, cellulose, proteins etc. and thereby demonstrates the extent of mineralization. TG spectral analysis had revealed a mass loss of 80% and 71% in vermicompost produced from primary and secondary sludge respectively. GC-MS studies have also shown the presence of several humic acids like octadecanoic acid, heptadecanoic acid etc. in the decomposing substances demonstrating as an indicator of the maturity of products. This was further confirmed by the decrease of humification index which focuses the combined action of both earthworms and microbes in the degradation of organic wastes. The present study has highlighted the role of an indigenous earthworm in converting specific industrial wastes especially by recording the point of maturation using humic acids an indicator of the quality of decomposing of wastes following several instrumental applications.

The use of fibre-based materials as substrates in printed electronics has been increasing, mainly due to its attractive characteristics, such as low-cost or wide availability. Additionally, paper enables recycling and it shows attractive features, such as high thermal stability, when compared to traditional polymer-based substrates (Tobjörk and Österbacka, 2011 [1]). Nevertheless, one of the drawbacks of using paper substrates is that the surface usually is very rough, typically, showing roughness values above 10 μm2. In most cases, printing structures that need to be highly uniform, without disruptions, require additional coating. Inkjet printing provides sharp detail reproduction and strict lines on printed structures. Sintering is required for drying the ink. Thermal sintering is the traditionally used method, but requires long periods of time and promotes the ageing of the paper due to a long exposure at high temperature. When printing conductive structures on paper alternative photonic sintering methods such as IR-sintering show some attractive characteristics. IR-sintering is compatible with roll-to-roll fabrication, providing low-cost, fast and localized sintering, which makes it suitable for fibre-based substrates (Tobjörk et al., 2012 [3]). This work has been carried out to study and compare the efficiency of thermal and IR sintering of conductive structures on different paper and polymer substrates. All substrates were printed using silver based ink, which was applied on the substrate surface by inkjet. Resistivity values of the printed structures were used to compare the performance on the substrates. IR-sintering showed the best results in terms of achieved conductivity of the printed lines when using short sintering time of no more than 10 min. The conductivity values of the inkjet-printed silver lines on Lumi silk substrate reached about 40% of the bulk silver value after IR-sintering, whereas with thermal-sintering this value only reached about 20% of the bulk silver value. IR-sintering improves the sintering process, increasing the conductivity of the printed structures and at the same time reducing significantly the sintering time. In the case of Lumi silk substrate, high conductivity was observed after only two minutes of sintering time when IR-oven was used. Both techniques can be used in a roll-to-roll mass manufacturing process, enabling the fabrication in large scale of flexible electronic devices, on paper substrates, without the need for extra steps, such as coatings.

Zeolite nanostructures were used as hosts for dyes normally used in some bioassays (pH and protein), and applied on microfluidic paper-based analytical devices (PADs). The obtained dye nanomaterials were characterized by several techniques (structural (FTIR and XRD), surface (SEM/EDX), textural (N2 adsorption) analyses and dye loading determination by TGA analysis), to confirm the stability of both host and guest. After their deposition on the papers surface, the color change was studied by analyzing the RGB values, taking into account the lifetime and the results stability of the PADs. These results confirmed that both the lifetime and the color change of the modified devices were stable over one week. It was also demonstrated that the choice of the paper for the PAD as well as the zeolite nanostructures properties influences the colorimetric response. This strategy by encapsulating dyes into zeolites solve current challenges in colorimetric sensors in where long-term stability of the colorimetric results is an issue. The results obtained were promising for the studied assays, and the strategy could also be extended to other bioassays., A.R.B. thanks for the ERASMUS+ program to her grant. This work has been developed under the scope of the projects: BioTecNorte (NORTE-01-0145-FEDER-000004), AIProcMat@N2020 (NORTE-01-0145-FEDER-000006), projects supported by Norte Portugal Regional Operational Programme (NORTE 2020), under the Portugal 2020 Partnership Agreement, through the European Regional Development Fund (ERDF). This work also has been funded by ERDF through COMPETE2020–Programa Operacional Competitividade e Internacionalização (POCI), Project POCI-01-0145-FEDER-006984, Associate Laboratory LSRE-LCM and by national funds through FCT, Fundacão para a Ciência e a Tecnologia for project PTDC/AAGTEC/5269/2014 and Centre of Chemistry (UID/QUI/00686/2013 and UID/QUI/0686/2016). The support from the Oslofjordfondet project, «Touchsensor for enklere og raskere urinprøvetaking og analyse (no. 234972)» and NSFC project no. 61650410655 is also acknowledged., info:eu-repo/semantics/publishedVersion

Over the past few years, what might not unreasonably be described as a true revolution has taken place in the field of machine vision, radically altering the way many things had previously been done and offering new and exciting opportunities for those able to quickly embrace and master the new techniques. Rapid developments in machine learning, largely enabled by faster GPU-equipped computing hardware, has facilitated an explosion of machine vision applications into hitherto extremely challenging or, in many cases, previously impossible to automate industrial tasks. Together with developments towards an internet of things and the availability of big data, these form key components of what many consider to be the fourth industrial revolution. This transformation has dramatically improved the efficacy of some existing machine vision activities, such as in manufacturing (e.g. inspection for quality control and quality assurance), security (e.g. facial biometrics) and in medicine (e.g. detecting cancers), while in other cases has opened up completely new areas of use, such as in agriculture and construction (as well as in the existing domains of manufacturing and medicine). Here we will explore the history and nature of this change, what underlies it, what enables it, and the impact it has had - the latter by reviewing several recent indicative applications described in the research literature. We will also consider the continuing role that traditional or classical machine vision might still play. Finally, the key future challenges and developing opportunities in machine vision will also be discussed.

In pulp and paper production black liquor is burnt to recover base chemicals and to generate electricity and steam which is e.g. used in papermaking machines. In the event of paper tearing excess steam has to be condensed usually. We propose a latent thermal energy system to recover that energy and re-use it in the papermaking machines. A storage model was developed and experimentally verified by a lab-scale prototype. For the specific process, we designed a tube-bundle storage using thermally conductive HDPE as PCM and show that up to 30 MWh can be recovered per day. Finally, we describe the potential of storages to improve energy generation and efficiency in plants.

Recently, the research and development of novel antimicrobial food packaging paper have been accrued a considerable attention due to their ultimate advantages namely contain food in a cost-effective way that satisfies industry requirements and consumer desires, maintains food safety, and minimizes environmental impact also to increase the shelf life of foodstuff. These unique food packaging papers can be prepared through different materials such as synthetic polymers, nature or bio-polymers owing to their numerous properties. Therefore, in order to enhance the biological properties particularly the antimicrobial activity against the most pathogenic bacteria and biodegradability of the packaging material, the polymeric matrix can be reinforced with different fillers mainly biofiber, clay and agriculture biomass. Herein, this chapter book reviews the different classes of food packaging paper and their roles, manufacturing, applications and also the effects of antimicrobial agents on the final properties of packaging papers. The major aim of this review was to highlight the effect of several antibacterial agents on final mechanical and biological properties of biomass- based composites and nanocomposites materials. This chapter is divided into three parts, the first one is dedicated to the classifications and roles of food packaging systems, the second part is devoted to the manufacturing of packaging paper based on agriculture biomass, the third part concern the applications of these materials and the side effect of the antibacterial agents on their properties. From the results obtained in this research work, we can conclude that the agricultural biomass can be used to manufacture food packaging by several techniques mostly pulp manufacturing processes. Also, the mechanical and antibacterial properties of these materials can enhanced by the addition of divers antibacterial agents.

Paper and board recycling is now a central issue in papermaking. Understanding of material flows, as a part of the total production chain, as well as, fibrous and non-fibrous component flows needs further clarification. These flows are studied at a European level, with special focus on Germany and Sweden. Non-fibrous components are discussed in terms of a material which hampers the processing of paper and board. Resource-efficiency improvements, in conjunction with economic benefits, are sought and recycling has been able to fulfil both of these. The main drivers to maximize the use of recovered paper in paper and board manufacturing, have been improved over the last decades. These drivers are cost, environmental image and good technical properties to be used as raw material. The increased recycling rate has reduced the quality of the collected paper, produced recycled paper, and replaced virgin pulp. Also, recycling as a process, like deinking, produces large amounts of waste material that has challenges to find proper utilization. These problem areas are addressed in this paper, too. One focus area in the analysis of statistical information is an estimation of the share of non-fibrous components and fibre volumes of paper in Europe (EU) for the year 2010.

Measures for reduction of water consumption in pulp and paper mills are presented in this chapter. These include: in-pulp mill water conservation, modification of pulping and bleaching processes, separation of process and nonprocess waters, process modification, improvement in quality and management of paper machine wastewater, and system closure and integration of water systems/application of pinch technology.

The pulp and paper industry in the global market and a basic overview of pulp and paper manufacturing process are presented in this chapter.

Various organic and inorganic hazardous substances are commonly originated during the processing of virgin or recovered fibers (RCFs), when the pulp and paper (P\&P) are produced. Hence, pulp and paper industry (PPI) strongly need to employ advanced waste treatment processes as a powerful tool to comply with the stringent environmental regulations in one hand, and to increase their profitability in the current declining P\&P markets, on the other hand. Among the treatment alternatives, anaerobic digestion (AD), is an interesting cost-effective alternative with a small environmental footprint and has been increasingly adopted by the PPI to reach this goal. However, the application of AD to deal with wastes generated in P\&P mills has been restricted due to a number of limitations, regarding the anaerobic reactor design and the operating conditions. Hence, the optimization of the AD performance would be a crucial step in order to increase the economic benefits, and also to satisfy the strict environmental protection standards. To this end, this paper presents an overview on the current state of the developments associated with AD treatment of P\&P mill wastes to assess the applicability of this treatment process for the management of this type of complex wastes. In this context, suggestions are provided to maximize both biogas production and removal efficiency, focusing on the relationship between waste composition and reactor design and operational conditions, which will enhance methane capture and contribute to prevent global warming. (C) 2016 Elsevier B.V. All rights reserved.

The generation of three-dimensional superb packages of compact hexagonal periodic assembly with multifaceted layers was demonstrated using Poly (styrene-butylcrylate-acrylic acid) on glass substrates. The synthesized P(St-BA-AA) microspheres were used to formulate a fast drying UV curable terpolymer microspheres printing ink for the generation of colloidal crystal microdots on ink-jet paper with remarkable colours. The terpolymer microspheres and their formulated terpolymer ink undergo self-assembly to form blue monochromatic and viewing angle dependent tunable colours, thus affirming the photonic nature of the generated colloidal crystal films. Unlike other printing techniques which usually make use of specialized tools, this study generated a well ordered coloured tunable assembly of spherical shaped core-shell colloidal crystal microdots on the surface of an inkjet-paper by manually writing the as-synthesized P(St-BA-AA) UV curable printing ink microdots on it. The TEM analysis showed core and shell sizes of 198/50nm and 176/30nm for P(St-BA-AA)1 and P(St- BA-AA)2 respectively. Whenever the prepared terpolymer microspheres are used within the heating and transition temperatures of 383 °C and 110 °C, their thermal stability is retained. This simple technique of generating crystals microdots on inkjet paper may find use in optical devices, security applications and other colour coating applications., Materials science; Nanotechnology; Poly(styrene-butyalcrylate-acrylic acid); Photonic crystals; Monodisperse core/shell; Terpolymer; Colloidal ink; Colloidal crystal microdots

This work demonstrates a stand-alone power source that integrates a paper-based hydrogen fuel cell with a customized chemical heater that produces hydrogen in-situ upon the addition of a liquid. The presented approach operates by capillary action and takes advantage of the hydrogen released as a by-product of an exothermic reaction used in point-of-care diagnostics. The paper-based fuel cell produces a maximum power of 25.8 mW (103.2 mW cm−2), which is suitable for powering a diversity of electrical devices such as commercially available digital pregnancy tests and glucometers. While device shape and dimensions can be customized, here it is shown that the fuel cell can be designed in a compact form factor and footprint comparable to a lateral flow test while providing a remarkable power output. This approach holds great promise for powering portable diagnostics, as the generated electric power could enable device functionalities required for advanced assays, such as device timing, actuation, and signal quantification. Part of the same liquid sample that is to be analyzed (urine, saliva, water, etc) could be used to trigger the hydrogen generation and start the fuel cell operation., J.P. Esquivel acknowledges support from Marie Curie International Outgoing Fellowship (APPOCS - GA.328144) within the 7th European Community Framework Programme. J. Buser and P. Yager were supported by a grant from DARPA DSO/BTO--HR0011-11-2-0007, awarded to Yager at the University of Washington. P. Yager was supported in part by funds from the Department of Bioengineering at the University of Washington. S. Rojas acknowledges financial support from project ENE2013-42322R. N. Sabaté would like to thank financial support received from ERC Consolidator Grant (SUPERCELL - GA.648518).

Since the Second World War, the pulp and paper industry has become one of the most important industries in the world based on its economic benefits. Unfortunately, it is usually associated with high water usage and high electricity expenditure. Currently, pulp and paper mills are faced with various challenges forcing them to follow stringent environmental regulations and adopt sustainable waste management strategies as well as utilizing best available technologies to treat the effluent. While the discharge of hazardous effluent is certainly a growing concern, the pulp and paper industry is making great progress in reducing the quantity of wastewater it expends along with the amount of hazardous materials found in the effluent. This chapter provides a brief overview of waste generation and management in pulp and paper mills, and it also discusses the combined novel and conventional aerobic effluent treatment methods.

The activated sludge process is the most common treatment for pulp and paper mill effluents. Process modelling is a powerful tool to increase the knowledge of wastewater treatment plants, with the benefits, for instance, of reducing costs and time for making decisions on process improvement. Frequently, ASM models are used to describe the pulp and paper mill effluents treatment. These types of effluents usually have low nutrients contents, which affect the biomass growth and in consequence, the process efficiency. In this work, a mathematical model which includes the dynamic influence of adding nutrients to the aerobic stage of a paper mill industry is retrieved, identified, calibrated and validated, in order to gain knowledge on the process for efficiency, in which the nutrients (ammonium phosphate) are added by an auxiliary inflow. Due to practical purposes, the developed model considers only seven out of nineteen biological processes in the ASM2. To get a reliable mathematical model for the process, we followed a five-step methodology that includes: (a) problem definition, (b) experimental data obtainment, (c) model construction (d) model calibration and (d) linear error propagation for uncertainty analysis. The reduced ASM2 contains 31 parameters that were calibrated by a non-linear regression with real data plant. This step was applied to four operational scenarios, with and without variation of the KLa parameter, as well as with and without effluent recirculation of the clarifier. The results show that the reduced ASM2, developed here, shows good responses that can be identified to the real process. Therefore, it can be used confidently for operational decisions for improvement of the process.

The pulp and paper industry uses large volumes of water. Much water is lost to evaporation during production resulting in high demand for fresh water. The industry has made steady progress over the past three decades in reducing its relative water footprint. A growing market for equipment and services in pulp and paper water and wastewater treatment is seen. In this chapter water usage and consumption are presented. Water consumption standards are also presented.

The pulp and paper industry is one of the largest industries in the world with very high capital investments. Over 400 million metric tons of paper and cardboard are produced worldwide every year, with China being responsible for around one-quarter of the total production. Global pulp and paper production and consumption are presented in this chapter.

Pulp and paper mills are highly complex and integrate many different process areas. Processing options and the type of wood processed are often determined by the final product. A basic overview of pulp and paper manufacturing process, greenhouse gas (GHG) emission sources, and energy requirements in various pulp and paper processing steps are presented in this chapter.

The paper and packaging industry is an important part of the global economy and plays a critical role in the world economy. Cellulase, a complex enzyme produced by a number of microorganisms, has tremendous potential application in the pulp and paper industry. Cellulase contributes 10% of the worldwide industrial enzyme demand, and there is tremendous potential for cellulase biotechnology in pulp and paper manufacturing to grow steadily commercially, and to give rise to new possibilities. Cellulase, xylanase, laccase, and lipase are the most important enzymes that can be used in the pulp and paper processes. This prospective study aims to enhance the understanding of the most important advanced uses of cellulases for providing benefits to the pulp and paper industry in various areas like increased pulp yield, improved fiber properties, enhanced paper recycling, reduced processing and environmental problems, and energy efficiency.

Chemical additives used in papermaking fall into three groups—general (commodity) and two classes of specialty chemicals—process and functional. Process chemicals are used to optimize the production process by increasing machine speed, runnability, providing deposit control and reducing steam consumption. Retention aids, defoamers, fixative agents, biocides, and defoamers/antifoam additives are some typical examples of process chemicals. Functional chemicals directly affect paper quality and paper properties—color, water repellency, strength, printability, etc. Typical examples of such functional chemicals are dyes, coating binders, and strength and sizing additives. The boundary between process and functional chemicals is not very definite as process chemicals may either significantly influence performance of functional chemicals and/or affect sheet properties directly. About 90% of all chemical additives belong to functional additives. The remaining 10% are process chemicals, with retention aids (including fixatives, coagulants, flocculants and microparticles) representing the biggest and most important part. The in-depth and thorough coverage of chemical additives in the pulp and paper industry are presented. Various sections deal with pulping chemicals, bleaching chemicals, process chemicals, functional chemicals, pigments for fillers, coating pigments, aluminum, starch, chemicals used in paper recycling, and chemicals used for stickies control and tissue and towels.

The type of paper coated using chemical with the intension of changing color when exposed to heat is called thermal paper. The great advantage of thermal printing at its present state of development is its low cost and high reliability with regard to the instrument and the thermal paper. This study presents the manufacture and application of thermal paper. Also, the article describes the thermal paper based on color formers and the types of thermal paper. The thermal paper is use for thermal printers and copiers, mostly in lightweight or cheap devices like credit card terminals, cash registers, and adding machines.

The art, science, and technology of papermaking may be traced to 200 BC in China. Papermaking has played an important role in cultures all over the world and has evolved from simply pouring pounded pulp onto a fabric screen into the modern technology used today. This article traces the evolution of papermaking, the growth of paper technology, the variation in papermaking techniques, and reviews the economic and social reasons behind these changes.

Papermaking deposits can be classified as being organic, inorganic, or microbiological. Most paper machine deposits contain a combination of some or all of these major component types. Although inorganic deposits tend to be more of a problem in the stock and flow-piping systems of the paper mill, organic deposits tend to be more problematic in the headbox, wet end, and press section of the paper machine. These contaminants form tacky deposits that can plug forming fabrics and wet press felts. Microorganisms in paper mill systems take two forms: planktonic and sessile. Planktonic organisms do not readily cause problems in the system; however, in the sessile form, these same organisms can become problematic. Inorganic and organic deposits offer a readily available food source for sessile organisms, which attach themselves to deposit surfaces. Several of these organisms classified as slime formers are able to secrete a protective polysaccharide coating around themselves known as biofilm. The slime formers, in combination with inorganic and organic process additives and contaminants, can form deposits that coat process equipment and create sheet quality and runnability problems. In addition to slime formers, anaerobic bacteria can form under deposits. The most common type of anaerobic bacteria found in paper mills is sulfate-reducing bacteria, which is capable of converting sulfate in the system to highly corrosive hydrogen sulfide.

The pulp and paper industry is one of the largest industries in the world, with very high capital investments. The world's total paper production amounted to 403 million tons in 2013. The majority of manufacturing facilities in the paper industry are integrated. Most paper mills begin with wood chipping at the front end, followed by pulping, bleaching, papermaking, and recycling of post consumer products. The paper and paperboard industry in the global market and general aspects of pulp and papermaking processes are presented.

Nowadays, the paper industry is moving toward more sustainable or environmentally friendly processes. As a result, most modern paper mills are operating a closed loop process water system that operates under neutral or alkaline conditions with an increased consumption of recycled fibers as raw material. Currently more than 50% of the produced paper and board is derived from recycled fibers. These changes have resulted in an increasing number of problems resulting from slime deposits caused by an increase in microbiological activity. The paper machine loops and general aspects of paper making are presented.

The process to be applied to recovered paper to meet the quality requirements of recycled pulp is determined by the grade of the recovered paper and the demands of the final product. Roughly half of the total recovered papers are recycled for the production of case materials, mainly from old corrugated carton (OCC). Besides these brown recovered paper grades, white recovered paper grades, and some high-quality grades, are reused in newsprint, tissue and other graphic paper grades and in whip top layers of packaging papers, so these have to be deinked. Mixed recovered paper grades are used with OCC and for grey solid board layers and thus are not deinked. Deinking lines are more complex than OCC recycling lines. This is because in addition to the re-pulping and contaminant removal process steps, the pulp has to be deinked, and optionally bleached to achieve high brightness. Removing inks that are difficult to deink, like flexo prints and some digital prints, and ‘stickies’ from pressure-sensitive adhesives, are currently the main challenges in the field of deinking. Some examples of typical recycling and deinking lines for different applications – newsprint, fine paper, tissue, market pulp and packaging paper – are presented in this chapter.

Disturbance Management is a major issue in process industries like the pulp and paper (P&P) case and is mostly performed in the execution/control level. That approach is confined to the amendment of plans sent by upper levels and can thus be problematic. This paper moves towards the integration of planning and control, starting from the planning’s point of view. The application of Simulation-Optimization (S-O) allows considering uncertainty, but keeping a deterministic tractable optimization model. Indeed, it is the simulation model that incorporates more complex elements such as stochastic variables, as well as integrates (with more or less detail) the execution/control behaviour. In this work, we present a case study of a P&P mill, focusing on the two most critical production resources (the digester and the paper machine). The feedback obtained by simulating their interaction is used to adjust the slacks introduced in the intermediate tank. In this way, we are able to generate plans that are not only optimized concerning company’s indicators, but also robust against disturbances.

The use of secondary fibre in virgin fibre affects the papermaking process in many ways. Machine runnability is negatively affected unless proper measures are taken to address potential problems. Sheet properties, appearance and performance may also be affected. The presence of secondary fibres can increase the dirt count, the number of holes in the sheet and cause picking on the lump-breaker, breaker stacks and calendar depending on the efficiency of the cleaning and screening systems. Recycled fibre sheets also tend to be weaker than virgin fibre paper. Brightness, colour and opacity may also be affected. With proper consideration of the recycled fibre quality and the capabilities of the paper machine, the transition to recycled fibre can be a smooth one, with little negative impact on paper machine runnability.

Writing and publishing a scientific paper in academic journals is a highly competitive, time-consuming stepwise process. The road to scientific writing and publication is rarely straightforward. Scientific writing has uniform format, which is perplexing for the novice science writers due to its inflexible anatomy (structure) and physiology (functions). Many obstacles are allied with the scientific writing path which can be minimized by applying some simple guidelines and practices. The scientific papers have an almost similar format but, original articles are divided into distinct sections and each segment contains a specific type of information. The basic anatomy of scientific papers is mainly comprised of the structure of the various components of a scientific paper, including title, abstract, introduction, methods, results, discussion, conclusion, acknowledgments and references. However, the physiology of a scientific paper is difficult to understand. Early career researchers and trainees may be less familiar with the various components of scientific papers. In this study, we applied an observational approach to describe the essential steps to facilitate the readers and writers to understand the basic characteristics, anatomy and physiology of writing the various sections of a scientific paper for an academic science journal. Keywords: Scientific paper writing, Publication process, Paper structure, writing tips

The closure of water circuits within pulp and paper mills has resulted in a higher contamination load of the final mill effluent, which must consequently be further treated in many cases to meet the standards imposed by the legislation in force. Different treatment strategies based on advanced oxidation processes (ozonation and TiO2-photocatalysis), and their combination with biological treatment (MBR), are herein assessed for effluents of a recycled paper mill and a kraft pulp mill. Ozone treatment achieved the highest efficiency of all. The consumption of 2.4 g O3 L−1 resulted in about a 60% COD reduction treating the effluent from the kraft pulp mill at an initial pH = 7; although it only reached about a 35% COD removal for the effluent of the recycled paper mill. Otherwise, photocatalysis achieved about a 20–30% reduction of the COD for both type of effluents. In addition, the effluent from the recycled paper mill showed a higher biodegradability, so combinations of these AOPs with biological treatment were tested. As a result, photocatalysis did not report any significant COD reduction improvement whether being performed as pre- or post-treatment of the biological process; whereas the use of ozonation as post-biological treatment enhanced COD removal a further 10%, summing up a total 90% reduction of the COD for the combined treatment, as well as it also supposed an increase of the presence of volatile fatty acids, which might ultimately enable the resultant wastewater to be recirculated back to further biological treatment.

There is a significant opportunity now for investors to build, own, and operate biorefineries at existing pulp and paper sites that will work synergistically and economically for the pulp and paper mill owner and the biorefinery owner. The pulp and paper industry is the world’s largest nonfood biomass collection system. The pulp and paper industry is a mature industry producing low-margin commodity products. But it has the ideal infrastructure, experience, and resources to capitalize on the strategic interest in renewable fuels via the biorefinery. Industry leaders, investors, policy-makers, and others are now beginning to better understand the vital role to be played by biorefineries as we move from a fossil fuel-based energy economy toward a bio-based one. When properly located and operated, the potential of an integrated forest biorefinery is expected to be huge: a very attractive and synergistic business opportunity for both the colocated pulp and paper mill and the biorefinery itself. Biorefineries are a key pathway to our biofuture, displacing fossil fuels and supplying clean, renewable, and carbon neutral energy. Biorefineries fit very well at pulp and paper mills because of their inherent ability to gather and process biomass and create energy from biomass.

This chapter describes the mass and energy requirements of pulp and paper processes in general, and specifically the Kraft process, which is the dominant pulping process as well as the most intensive steam user. The strong interactions between water and heat networks in pulp and paper mills are discussed. Water in pulp and paper processes is used for dilution, washing, cooling and heating, and is the main heat transporter and dissipator in pulp and paper processes. Approaches to increasing energy efficiency in existing mills are presented. Results show that there is a heat-savings potential of approximately 15–30% in typical existing mills. Finally, trends in Process Integration techniques in the pulp and paper industry are presented.

A systematic review into the literature surrounding industrial carbon capture has been performed, with a particular focus on costs per tonne of CO 2 avoided. The authors have reviewed 250 research articles in order to extract data regarding industrial CCS, focusing on four main carbon-emitting industries; the iron and steel industry, the refining industry, the pulp and paper industry and the cement industry. Only 25 costs were returned as part of the search, and across the four industries they suggested that the cost of carbon capture on industries after conversion to 2013 US Dollars is $20-140 per tonne of CO 2 avoided. The highest costs were found using amine scrubbing, the most mature technology, with other less mature technologies reporting lower costs, for example, calcium looping applied to the cement industry was reported to have costs of in the range of $20-75 per tonne avoided, with the only lower costs reported being in the pulp and paper industry reported between $16 and $35. However, the paucity of costing data increases the uncertainty surrounding industrial CCS, meaning that more economic data are required before any conclusive decisions can be made.

Low-cost easy-to-use paper testing devices such as strips for pH, pregnancy, or diabetes testing have been commercially available for years. Recently, using advances from microfluidics, researchers have enhanced these tools and developed microfluidic paper-based analytical devices (μPAD). These ‘lab-on-paper’ devices are capable of achieving complex and precise qualitative and quantitative measurements of a wider array of biochemicals inexpensively. This chapter explores the current methods for low-cost assays in paper-based microfluidic devices. It summarizes device fabrication, performance, and reliability, as well as the techniques and progress achieved in detection with examples of applications to explain how they represent a promising platform for biochemical sensing. Finally, it presents the current limitations and a few perspectival trends.

This paper presents an optimization strategy for pulp/water flow management in a paper production system. The problem is formulated at two levels - the upper/design level concerning optimal volumes of the pulp/water tower and the lower/operational level concerning how to control the system optimally with given tower volumes. At both levels of there are multiple and conflicting objectives.

This chapter focuses on pollution prevention (P2) and cleaner production. In terms of cleaner production it is necessary to define gasification as a technology that affords pulp and paper mills an important infrastructure investment into green power and overall reduction in the environmental footprint for the industry. Gasification technologies are now at the stage where they may be implemented at mills for black liquor gasification. Integrated plants capable of producing biofuels are perhaps only a few years away from commercialization, but interim investments into the basic building blocks are currently available. This chapter elaborates the general P2 practices and cleaner production. P2 practices define that pulp and paper are manufactured from raw materials containing cellulose fibers, generally wood, recycled paper, and agricultural residues. The main steps in pulp and paper manufacturing discussed are: raw material preparation, such as wood debarking and chip making, pulp manufacturing, pulp bleaching, paper manufacturing, and fiber recycling.

Biofouling causes important economic losses in the paper industry. To prevent or mitigate the effects of biofilms is necessary to implement microbiological control programmes based on monitoring programs which requires the evaluation of the biofilm growth kinetic taking into account the ability of microorganisms viability. The monitoring techniques must be rapid to minimise both costs and use of chemicals. This paper presents the study of the growth kinetics of two bacterial strains known for their high capacity to produce biofilms in paper mills. After the validation of flow cytometry as a technique for microbial growth monitoring, the development of segregated kinetic models based on cell physiological states data was carried out. The developed models can be used to design microbial control programs.

No water – no paper. This statement still holds true today. On the other hand, freshwater is a scarce resource that entails high costs. The pulp and paper industry has managed to use water efficiently in the past few decades. Nevertheless, the challenge of a zero effluent system has not been satisfactorily tackled up to now. Optimization of existing water circuits and the development of new treatment concepts are currently the principal tasks motivated by the pressure to minimize costs, increase productivity, and ensure product quality requirements.

Publisher Summary This chapter introduces the major sources of pollution, the chemicals of concern largely from an air pollution standpoint, and methods to estimate some of the releases through the application of emission factors. Most of the environmental impact from this industry sector is associated with the manufacturing process (particularly with pulping), with the environmental fate of the product representing a secondary, but still significant concern. Paper products constitute the largest single fraction of municipal solid waste. The production and use of paper is an enormous industry. The paper industry is an energy-consuming giant. Worldwide, the paper industry is the fifth largest consumer of energy, accounting for 4% of total global energy use. It also creates waste on a very large scale. In order to achieve sustainability, paper companies are implementing techniques to control waste and emissions. These techniques vary from reducing the overall use of energy to using new technologies to help control emissions.

We reviewed the 80 most outstanding papers ever presented and hence rewarded with awards at “IFSCC,” the one and only international conference/congress specializing in multiply combined scientific disciplines from which cosmetics are born, in an attempt to extract any correlations between such papers and cosmetic R&D trends over more than 40 years of time frame that gave birth to these papers. The 80 award-winning papers were categorized as either “Skin biology,” “Formulation technologies and new materials,” or “Hair and scalp,” and technological advancements were assembled chronologically based on their research contents. It is meaningful to look back at past technical trends in order to gain insights into new areas of research interests and/or product development.

Many blood tests require the separation of blood cells from plasma. This chapter describes an experiment for the fabrication of a paper microfluidic device that can be later used for blood-plasma separation. The chapter starts with describing the importance of blood-plasma separation in clinical diagnostic procedures. General information on paper microfluidics and protein determination is also provided in the background section. The next sections cover topics related to the design of a paper microfluidic device, the chemicals and materials required, and hazards associated with this experiment. The experimental section includes a step-by-step procedure for device fabrication, separation techniques, and colorimetric determination of blood plasma. Additional notes that may help instructors and students are also highlighted. The included assessment questions can help judge students’ knowledge of the experiment. References at the end of the chapter may be helpful for further reading.

A simple method to verify Beer–Lambert’s law, which is popularly known as Beer’s law, is presented in this chapter. The law is verified using color solutions and a paper device combined with a smartphone as a detector. This experiment does not require a colorimeter or spectrophotometer. While basic information on Beer’s law is given at the beginning of this chapter, the following sections cover topics related to design of the paper microfluidic device, the chemicals and materials required, and the hazards associated with this experiment. The experimental section includes a step-by-step procedure for with detailed steps for device fabrication, solution preparation including extraction of starch from potato, color assay, and data-acquisition methods. Additional notes that may help instructors and students are also highlighted. Assessment questions given at the end of the chapter will be helpful to determine students’ knowledge of the experiment.