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Copyright of Przegląd Elektrotechniczny is the property of Przeglad Elektrotechniczny and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Urban History Review / Revue d'Histoire Urbaine is the property of University of Toronto Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rozwój Regionalny & Polityka Regionalna is the property of Uniwersytetu im. Adama Mickiewicza (IH UAM) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Energy Policy Journal / Polityka Energetyczna is the property of Mineral & Energy Economy Research Institute of the Polish Academy of Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Energy Policy Journal / Polityka Energetyczna is the property of Mineral & Energy Economy Research Institute of the Polish Academy of Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In Chlef, the management of urban solid bio-waste is limited to "all in controlled landfill or in wild landfill". This bio-waste can be treated by composting-methanization. With this in mind, two temperature regimes were chosen, the mesophilic regime (35°C) and the thermophilic regime (55°C). The choice of a neutral pH is an optimal value indicating the stability and the good progress of the anaerobic digestion. As well as monitoring the parameters of the composting process. The results of the composting process show that the values of temperature (35°C to 62°C), pH (5 to 8), moisture content (60% and 40%) and percentage of organic matter (74% to 41%) indicate that the fermentation process is going well. The composting process enters the cooling phase after 60th day of fermentation. While the results of the methanization show that a substrate with an organic matter content of 73% causes an accumulation of acids in the digester and a stop of the reaction in mesophilic conditions. Therefore, the thermophilic mode is more suitable for the anaerobic degradation of raw bio-waste. The tests were conclusive in obtaining a flammable biogas. The values of the VFA (Volatile Fatty Acid)/ACT (Alkalimetric Title) ratios below 0.1 show the good functioning of the anaerobic digestion. The methanization of two masses of substrate at the beginning and during the cooling phase of composting allows a gain in residence time, thus a lower energy cost. [ABSTRACT FROM AUTHOR]

Copyright of Safety & Security Sciences Review / Biztonságtudományi Szemle is the property of Obuda University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Energy Policy Journal / Polityka Energetyczna is the property of Mineral & Energy Economy Research Institute of the Polish Academy of Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Energy Policy Journal / Polityka Energetyczna is the property of Mineral & Energy Economy Research Institute of the Polish Academy of Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Inzynieria Mineralna is the property of Polskie Towarzystwo Przerobki Kopalin and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Studia Maritima is the property of University of Szczecin Press / Wydawnictwo Naukowe Uniwersytetu Szczecinskiego and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Studies in Law: Research Papers / Studia Prawnicze. Rozprawy i Materialy is the property of Andrzej Frycz Modrzewski Krakow University, AFM Publishing Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Przegląd Elektrotechniczny is the property of Przeglad Elektrotechniczny and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Przegląd Elektrotechniczny is the property of Przeglad Elektrotechniczny and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ecological Engineering / Inżynieria Ekologiczna is the property of Polish Society of Ecological Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Algerian Journal of Environmental Science & Technology is the property of Algerian Journal of Environmental Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Energy Policy Journal / Polityka Energetyczna is the property of Mineral & Energy Economy Research Institute of the Polish Academy of Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The effects of a mechanical process were determined on the solid fuel quality and anaerobic biodegradability of hazelnut and olive pruning. Both the feedstocks did not meet the specification for industrial and residential pellets given in the European Standard EN ISO 17225-2, because of too high ash and nitrogen content. The coarser products from processing were notable for the high reduction in both the ash and nitrogen content. Therefore, as regards hazelnut, they met the requirement of the Standard for both the industrial and residential pellet, whereas those from olive processing met the requirements for the industrial pellet. The finest products showed a high concentration of nitrogenous matter and smaller C/N ratios, far better for anaerobic digestion. The best products from hazelnut and olive achieved methane yields of 118.1 and 176.5 Nm3 tVS -1, respectively, corresponding to 70.1% and 93.5% gains over the untreated substrates. The process was highly energy efficient, since consumption was low compared with the energy output from the residues of fuel upgrading, intended for anaerobic digestion. The investigated process could be successfully used to improve the fuel quality of pruning and to generate products suitable for anaerobic digestion and the production of advanced biofuels. [ABSTRACT FROM AUTHOR]

Copyright of Safety & Fire Technology / Bezpieczeństwo i Technika Pożarnicza is the property of Centrum Naukowo-Badawcze Ochrony Przeciwpozarowej and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Larhyss Journal is the property of Biskra University, Research Laboratory in Subterranean & Surface Hydraulics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The subject of the study is the profitability of selected substrates used in agricultural biogas plants. Dry matter, organic dry matter, COD, total nitrogen, organic acids, biogas potential and methane content in biogas were investigated in the analyzed substrates. The measurements for biogas potential were performed as a batch-test at 38°C. The results enabled to estimate the energy balance, which was the basis for economic calculation for each of the analyzed substrates. As a result of the analysis it was found that maize silage provides the highest energy gain, while the lowest energy gain is acquired from cattle slurry and whey. [ABSTRACT FROM AUTHOR]

The research carried out in this work determined the biochemical methane potential of the solid fraction remaining after acid fermentation with the recovery of volatile fatty acids and hydrogen, in which kitchen waste was used as the substrate. The methane fermentation process was carried out in bath bioreactors without pH regulation during the process, with the addition of digestate sludge from wastewater treatment plants and without its addition, at various substrate concentrations. It was found that the solid fraction after acid fermentation with the addition of digested sludge, is a good substrate for biogas production. The highest biochemical methane potential of 640 cm3 CH4×gsmo-1 was found in the process in which the waste solid fraction after acid fermentation concentration was 100 gm×dm-3. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Animal Science Biology & Bioeconomy is the property of University of Life Sciences in Lublin and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The aim of this paper was to study meat industry wastewater treatment efficiency during fermentation process in ASBR reactor and post-treatment in UF process. The anaerobic process obtained a considerable degree of the removal of organic pollutants from raw wastewater designated as COD (73.3%), BOD (71.4%) and TOC (83.2%). The concentrations of COD and BOD were 435 and 443 mg/dm3, respectively. The value of TOC reached a level of 136 mg/dm3. Generated biogas in the methane fermentation process of wastewater from meat industry plants was characterized by high methane content (80.9% vol.). In the final part of the experiment, the UF process was used in order to post-treating effluent from ASBR reactor. During the UF process, COD, BOD and TOC parameters were removed at 67.2%, 68% and 70.4%, respectively.

The study evaluated possibilities of using sorghum biomass as a substrate for production of methane in agricultural biogas plants. Five different sorghum varieties, cultivated at two different localisations: Straszków and Śmiłów were analysed. The analysis of biochemical methane potential (BMP) indicated that in both localisations the best results were achieved in the case of Sucrosorgo variety of sorghum. Yield of methane from hectare was 8586 m3 ha-1 year-1 in location Straszków, and 7859 m3 ha-1 year-1 in location Śmiłów. The lowest yield from hectare and the lowest efficiency of methane from hectare in both locations were registered for the Akklimat variety (2320 m3 ha-1 year-1) and Nutri Honey (2762 m3 ha-1 year-1). The comparative analysis of the ERoEI index proved that the Sucrosorgo variety is definitely the most effective (8.71 at the Straszków location and 7.97 at the Śmiłów location) from the others in terms of energy efficiency. The energy efficiency of this variety is nearly four times higher than the least effective (Akklimat - 2.34). [ABSTRACT FROM AUTHOR]

Copyright of Zywnosc is the property of Polish Society of Food Technologists - Scientific Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ecological Engineering / Inżynieria Ekologiczna is the property of Polish Society of Ecological Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Przegląd Elektrotechniczny is the property of Przeglad Elektrotechniczny and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This experimental study carried out on the scale laboratory and reveals the main results of the anaerobic digestion of the effluents from food industry. In this study, it consists of a mixture of apricot and orange juice. The parameters that affect directly the fermentation process have been monitored, such as: growth, chemical oxygen demand (COD), pH. The cumulative biogas volume found was about 23055NmL, it was reached after 552 h of digestion in acid medium. In such case, the degradation of the organic matter reached about 60%. Furthermore, the methane content was measured using a (GC/MS), it was found to be of the order of 71%. The kinetics of biogas production was modeled with the modified Gompertz model. A good agreement between this model and the experimental data was obtained. [ABSTRACT FROM AUTHOR]

Copyright of Ecological Engineering / Inżynieria Ekologiczna is the property of Polish Society of Ecological Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Technical Transactions / Czasopismo Techniczne is the property of Sciendo and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ecological Engineering / Inżynieria Ekologiczna is the property of Polish Society of Ecological Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ochrona Srodowiska i Zasobów Naturalnych is the property of Sciendo and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Central European Agriculture is the property of Journal of Central European Agriculture and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Economica (1585-6216) is the property of College of Szolnok and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Economica (1585-6216) is the property of College of Szolnok and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Romanian Journal of Civil Engineering / Revista Română de Inginerie Civilă is the property of Matrix Rom and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The inexpensiveness of import and high prices of livestock noted in the last few years are one of the most significant reasons for the lack of profitability of meat industry companies. An additional problem for the entrepreneurs in this sector is the production of meat waste which needs to be properly managed, which usually generates high costs. Methane fermentation seems to be the optimal solution for this problem. Such substrates as swine slurry and digestive tract content can be used as a substrate for biogas plants without heat pretreatment, while slaughterhouse waste requires prior hygienisation in accordance with the Regulation of the European Parliament and Council Regulation (EC) No 1069/2009 of 21 October 2009.In the Laboratory of Eco-technology functioning at the Institute of Biosystems Engineering at the University of Life Sciences in Poznan research on biogas efficiency of waste from a meat processing plant "Paszak" in Olszowka (municipality of Przykona) was conducted. The analysis was performed on the basis of the German standard DIN 38 414/S8. On a base of achieved results it was concluded that these substrates have a very high energy potential. It was also shown that rational waste management burdensome slaughterhouse waste such as swine slurry and digestive tract cane generate economic profit resulting from the sale of electricity and heat production, but also in the avoidance of costs of proper waste utilization. [ABSTRACT FROM AUTHOR]

Copyright of Ochrona Srodowiska i Zasobów Naturalnych is the property of Sciendo and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In this research a computational simulation of the process of anaerobic digestion was carried out, using a homogenous mixture of bovine manure and citric residuals to assess the viability of renewable energy generation from the co-digestion of these residuals. In accordance with the former outcomes, an experimental stage was carried out in which periodic measurements of the control variables of anaerobic biodegradability were taken such as pH, alkalinity, oxygen chemical demand (total and soluble), among others. Also, process performance parameters were established and comparative values between experimental outcomes and computational results were determined. Additionally, a simulation of the anaerobic digestion process was carried out under similar conditions formerly established in a previous research through different experiments using the ADM-1 model. Based on the expected outcomes and as a result of experiments and simulations, the model precision was evaluated taking into account the values obtained from experimental measurements. Finally, a simplified model was implemented to evaluate energy production by a pilot-scale installation which performs the anaerobic treatment of organic residuals under observation. This model showed that there was an energetic deficit at the beginning; however, once the biogas production started the process, it became auto-sustainable and the system provided an increasing amount of available energy. [ABSTRACT FROM AUTHOR]

Increasing the share of renewables in the overall energy balance is one of the main lines of research. One of the fuels possible to be used is biogas, which can be obtained from different raw materials. Due to its properties biogas can be used as fuel for spark ignition engines. The utilization of biogas to a much more efficient compression ignition engine is difficult and requires application of dual fuel supply system. The article describes the developed laboratory test stand for examining efficiency of compression ignition engine powered by gaseous fuels including biogas, operating in cogeneration system. The paper also presents the results of preliminary tests of this engine. [ABSTRACT FROM AUTHOR]