219 results on '"Tien-Thanh Nguyen"'
Search Results
202. Effect of different flocculants on short-term performance of submerged membrane bioreactor
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Saravanamuthu Vigneswaran, Rupak Aryal, Tien Thanh Nguyen, Wenshan Guo, Huu Hao Ngo, Fonny Dharmawan, Guo, Wenshan, Ngo, H, Vigneswaran, Saravanamuthu, Dharmawan, F, Nguyen, TT, and Aryal, Rupak
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specific oxygen uptake rate (SOUR) ,Flocculation ,Chromatography ,Membrane reactor ,Fouling ,Chemistry ,submerged membrane bioreactor (SMBR) ,Membrane fouling ,Chemical oxygen demand ,Filtration and Separation ,flocculant ,Chemical Engineering ,Membrane bioreactor ,Pulp and paper industry ,Analytical Chemistry ,nutrients removal ,Bioreactor ,Nitrification ,critical flux - Abstract
This study aims at evaluating the impacts of flocculant addition to a submerged membrane bioreactor (SMBR). Three types of common flocculants (FeCl3, PACl and chitosan) were tested based on the performance of organic and nutrients removal, respiration test and fouling control. The data showed that all of the flocculants not only could keep high removal efficiencies of DOC and COD (>90%) compared to SMBR alone, but also exhibited different advantages and disadvantages according to the properties of the flocculants. For instance, inorganic flocculants strongly affected the nitrification process and organic flocculant addition slightly reduced the phosphorus removal efficiency in SMBR. After adding FeCl3 and PACl, NH4-N removal decreased to 31.9% and 11.1%, while T-N removal dropped to 22% and 0.5% respectively. Although flocculants addition improved sludge settleability and oxygen transfer to some extent, organic flocculant obtained more stable sludge volume indexes (SVI) and specific oxygen uptake rates (SOUR) than those of inorganic flocculants. Inorganic flocculants, on the other hand, led to more reduction of soluble microbial products (SMP) present in mixed liquor and lower membrane fouling rates (1.3 and 2.6 kPa/day for FeCl3 and PACl respectively). © 2009 Elsevier B.V. All rights reserved.
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- 2010
203. The immobilization of heavy metals in biosolids using phosphate amendments--comparison of EPA (6010 and 3051) and selective sequential extraction methods
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S. Sivakumar, Boo Gil Kim, Young-Chae Song, Tien Thanh Nguyen, and Soo-Hong Kim
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Pollution ,Environmental Engineering ,Biosolids ,Health, Toxicology and Mutagenesis ,media_common.quotation_subject ,Amendment ,chemistry.chemical_element ,Chemical Fractionation ,Waste Disposal, Fluid ,Phosphates ,chemistry.chemical_compound ,Metals, Heavy ,Environmental Chemistry ,United States Environmental Protection Agency ,Fertilizers ,Waste Management and Disposal ,media_common ,Sewage sludge ,Cadmium ,Waste management ,Extraction (chemistry) ,Phosphate ,United States ,chemistry ,Wastewater ,Environmental chemistry - Abstract
Biosolids are organic by-products from wastewater treatment plants that contain valuable nutrients but also represent a pollution problem. The amount of heavy metals in biosolids at high concentrations prevents their use as fertilizers. The aim of the present study is to immobilize heavy metals in biosolids using phosphate amendments. Analytical-grade potassium dihydrogenphosphate (KH2PO4) was used as the source of phosphate, and its ability to reduce heavy metals in biosolids (200 g) was evaluated according to five additional phosphate quantities: Control (C) (without phosphate), P1 (1.45 g), P2 (2.9 g), P3 (5.8 g), P4 (10.15 g), and P5 (14.5 g). The effect of phosphate treatments on metal extractability was evaluated using the selective sequential extraction (SSE) method, and total metal concentrations were analyzed by the (US Environmental Protection Agency) EPA 6010 and EPA 3051 methods. The total and extractable level of metals showed that Cu, Zn and Pb were the predominant elements in the biosolids analyzed in this study (control). SSE results showed that, on average, over 80% of the total metals present in the biosolids were found in the organic (F4) and residual (F5) fractions for Cu and Zn; Fe–Mn oxide (F3), organic (F4) and residual (F5) fractions for Cd; exchangeable (F1) and residual (F5) fractions for Pb; and exchangeable (F1), organic (F4) and residual (F5) fractions for Ni. The addition of phosphate substantially decreased the amount of metals (Cu, Zn, Cd, Pb, and Ni) in biosolids after a 10-day period; however, the amount of removal varied between the examined analytical techniques.
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- 2008
204. Study on the hydatid cyst membrane: permeation of model molecules and interactions with drug-loaded nanoparticles
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Hernan Heras, Marie-Elisabeth Sarciron, Fabrice Pirot, Tri Truong Cong, Françoise Falson, Vincent Faivre, Nadia Walchshofer, and Tien Thanh Nguyen
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Chromatography ,Stereochemistry ,Chemistry ,Diffusion ,Pharmaceutical Science ,Permeation ,medicine.disease ,Albendazole ,Permeability ,Partition coefficient ,Membrane ,Echinococcosis ,parasitic diseases ,medicine ,Nanoparticles ,Cyst ,Solubility ,Microparticle ,medicine.drug - Abstract
The success of the chemotherapeutic treatment of hydatid disease is based upon the drug ability to operate on the germinal layer and on the protoscolices of the hydatid cyst interior at adequate concentrations for sufficient periods. The goal of this study was to evaluate the ability of the drug diffusion through the cyst membrane from sheep hydatid cysts and the increase of drug concentration in the cyst environment. In the first part of this work, the permeation behaviour through the hydatid cyst membrane was studied with five model molecules, having different molecular descriptors (logP, molecular weight, polar surface area ...) onto static Franz glass diffusion cells. A good correlation has been observed between the permeation coefficient and the partition coefficient, log P (r=0.951). In the second part, albendazole-loaded nanoparticles (about 300 nm) prepared by the emulsion solvent evaporation method have shown a sufficient entrapment efficiency (36.4 +/- 6.4%) to raise the apparent solubility of albendazole. The diffusion of drug from the nanoparticles across the hydatid cyst membrane was also improved compare to albendazole suspension. These results have shown the interest of the albendazole-loaded nanoparticles for the treatment of hydatid cysts in the future.
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- 2007
205. Immobilization of ß-Galactosidases from Lactobacillus on Chitin Using a Chitin-Binding Domain.
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Mai-Lan Pham, Leister, Tatjana, Nguyen, Hoang Anh, Bien-Cuong Do, Anh-Tuan Pham, Haltrich, Dietmar, Yamabhai, Montarop, Thu-Ha Nguyen, and Tien-Thanh Nguyen
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- 2017
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206. Modeling and debugging numerical constraints of cyber-physical systems design
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Tien, Thanh Nguyen, primary, Nakajima, Shin, additional, and Quyet, Thang Huynh, additional
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- 2013
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207. 3D Model Reconstruction Based on Laser Scanning Technique
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Nguyen Tien Thanh, Nguyen Tien Thanh, primary, Liu Xiuguo, 刘修国, additional, Wang Hongping, 王红平, additional, Yu Mingxu, 于明旭, additional, and Zhou Wenhao, 周文浩, additional
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- 2011
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208. 3D Model Reconstruction Based on Laser Scanning Technique
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刘修国 Liu Xiuguo, Nguyen Tien Thanh Nguyen Tien Thanh, 王红平 Wang Hongping, 周文浩 Zhou Wenhao, and 于明旭 Yu Mingxu
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Optics ,Materials science ,Laser scanning ,business.industry ,3d model ,Electrical and Electronic Engineering ,business ,Atomic and Molecular Physics, and Optics - Published
- 2011
209. The Reduced Expression of Prion Protein Influences the Expressions of Signal Proteins in Calbindin-D9k and -D28k Knockout and D9k/28k Double Knockout Mice
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Tien Thanh Nguyen, Eui-Bae Jeung, and Yeong-Min Yoo
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Reproductive Medicine ,Calbindin-D9K ,Cell Biology ,General Medicine ,Prion protein ,Biology ,RBBP7 ,Double knockout ,Signal ,Expression (mathematics) ,Cell biology - Published
- 2010
210. Homodimeric β-Galactosidase from Lactobacillus delbrueckii subsp. bulgaricus DSM 20081: Expression in Lactobacillus plantarum and Biochemical Characterization.
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Tien-Thanh Nguyen, Hoang Anh Nguyen, Arreola, Sheryl Lozel, Mlynek, Georg, Djinović-Carugo, Kristina, Mathiesen, Geir, Thu-Ha Nguyen, and Haltrich, Dietmar
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- 2012
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211. Unveiling the antibacterial potential of nature-inspired material for designing food-related coatings
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Yen Dang, Khuong Ba Dinh, Tien Thanh Nguyen, and The Hy Duong
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antibacterial ,antimicrobial ,hierarchical structures ,bio-inspired ,biomimetic ,Technology - Abstract
The escalating challenge of antibiotic resistance has driven the innovation of new antibacterial and antifouling materials. Recent developments focus on nature-inspired topographical engineering and nanostructured surfaces to combat resistant bacteria. This review discusses these advances, emphasizing the potential of nanoantibiotics and biopolymers. Nanoantibiotics revitalize drug effectiveness by encapsulating them in nanoparticles, presenting a new strategy to fight pathogens. Biopolymers, eco-friendly and biodegradable, emerge as a sustainable alternative, with applications in food safety and beyond. The exploration of these materials signifies a leap in design, fabrication, and the possibility of cost-effective, large-scale production, highlighting a promising avenue for commercial applications to tackle antibiotic resistance and biofouling effectively.
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- 2024
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212. A practical approach to nutritional intervention for people with chronic kidney disease in Vietnam.
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Lan Huong Thi Nguyen, Anh Kim Dang, Giang Thu Nguyen, Anh Minh Tran, Tien Thanh Nguyen, Phuong Thi Duong, Ha Ngoc Vu, and Huong Thi Le
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CHRONIC kidney failure , *NUTRITIONAL assessment , *NUTRITIONAL status , *NUTRITION counseling , *RENAL replacement therapy , *DIETARY patterns , *FATIGUE (Physiology) - Abstract
Background and Objectives: A comprehensive nutritional management is necessary for favourable outcomes in patients with chronic kidney disease (CKD). We aimed to assess the changes in nutritional status and disease progression with nutritional management where renal replacement therapy (RRT) was not in place. Methods and Study Design: A quasi-experiment intervention was conducted on 70 CKD patients at stages 3-5 from July to December 2022. Participants were excluded if they underwent RRT, including dialysis (hemodialysis or peritoneal dialysis), or kidney transplantation. The nutritional regimen covered nutritional counseling, samples of the dietary menu, and supplement products. We evaluated nutritional status using Subjective Global Assessment (SGA) scale and sub-clinical blood test at T0 (hospital admission) and T1 (two weeks after the admission or 24 hours before the discharge). Results: After the intervention, the number of patients classified as malnutrition or at risk of malnourished reduced significantly (65.7% to 54.3% and 25.7% and 5.7%, respectively). The serum concentration of urea, creatinine and parathyroid hormone decreased remarkably, especially in patients receiving nutritional management. In the intervention group, the dietary pattern provided increased intakes of calcium and iron at T1, while phosphorus, sodium and potassium decreased after follow-up. Nausea/vomiting, loss of appetite, tiredness and sleep disorders were improved in the intervention compared to the control group. Conclusions: Nutritional therapy enhanced the nutritional status, and quality of dietary and renal function in CKD patients without RRT. Applying nutrition education and treatment at an early stage can slow CKD progression, which should be applicable elsewhere in Vietnam. [ABSTRACT FROM AUTHOR]
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- 2024
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213. Estimation of erosion- deposition trends across the Quang Nam coast in the background of the climate variability
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Tien Thanh Nguyen
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shoreline extraction ,GIS ,erosion ,deposition ,Quang Nam ,MNDWI ,Engineering geology. Rock mechanics. Soil mechanics. Underground construction ,TA703-712 - Abstract
Relevance. In the face of current climate change trends, coastal erosion occurs more frequently in coastal lands. This problem not only causes damage to houses and works, but also affects the lives of coastal people. Quang Nam has a coastline of 125 km, which is an area that has been seriously eroded under the impact of hydrodynamic factors, along with extreme weather phenomena, affecting people's lives, and degrade the local economy. Aim. This article presents research on shoreline changes in Quang Nam region using the method of integrating remote sensing and GIS to create a change map. From there, identify erosion and deposition areas to help management agencies pay attention to the protection and development orientation of Quang Nam province in the context of climate change. Methods. Shoreline extraction method in combination with GIS to calculate the coastline change and combines with storm statistics to assess the shoreline change. Results. In the whole study area, erosion is dominant over deposition. Erosion is concentrated mainly in An Bang, North Cua Dai, Duy Hai and Tam Tien areas, ranging from 3.9–9.2 m/year. Deposition is concentrated mainly in the areas south of Cua Dai and Tam Hoa (near the mouth of Truong Giang river). In addition, the analysis results of shoreline changes in Quang Nam area, when combined with storm data affecting this area, also show a positive correlation. Research results can contribute useful information to local authorities to have solutions for planning and managing coastal areas.
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- 2024
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214. Antibacterial Electrospun Membrane with Hierarchical Bead-on-String Structured Fibres for Wound Infections
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Yu Xuan Fong, Catherine Pakrath, Fathima Shana Pattar Kadavan, Tien Thanh Nguyen, Trong Quan Luu, Borislav Stoilov, Richard Bright, Manh Tuong Nguyen, Neethu Ninan, Youhong Tang, Krasimir Vasilev, and Vi Khanh Truong
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nanofibres ,polycaprolactone ,silk sericin ,biocompatible ,biodegradable ,natural polymer ,Chemistry ,QD1-999 - Abstract
Chronic wounds often result in multiple infections with various kinds of bacteria and uncontrolled wound exudate, resulting in several healthcare issues. Advanced medicated nanofibres prepared by electrospinning have gained much attention for their topical application on infected chronic wounds. The objective of this work is to enhance the critical variables of ciprofloxacin-loaded polycaprolactone-silk sericin (PCL/SS-PVA-CIP) nanofibre production via the process of electrospinning. To examine the antibacterial effectiveness of PCL/SS-PVA-CIP nanocomposites, the material was tested against P. aeruginosa and S. aureus. The combination of PCL/SS-PVA-CIP exhibited potent inhibitory properties, with the most effective concentrations of ciprofloxacin (CIP) being 3 μg/g and 7.0 μg/g for each bacterium, respectively. The biocompatibility was evaluated by conducting cell reduction and proliferation studies using the human epidermal keratinocyte (HaCaT) cells and human gingival fibroblasts (HGFs) in vitro cell lines. The PCL/SS-PVA-CIP showed good cell compatibility with HaCaT and HGF cells, with effective proliferation even at antibiotic doses of up to 7.0 μg/g. The drug release effectiveness of the nanocomposites was assessed at various concentrations of CIP, resulting in a maximum cumulative release of 76.5% and 74.4% after 72 h for CIP concentrations of 3 μg/g and 7 μg/g, respectively. In summary, our study emphasizes the possibility of combining silk sericin (SS) and polycaprolactone (PCL) loading with CIP nanocomposite for wound management.
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- 2024
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215. Heterologous expression of a recombinant lactobacillal β-galactosidase in Lactobacillus plantarum: effect of different parameters on the sakacin P-based expression system
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Barbara Geiger, Dietmar Haltrich, Hoang-Minh Nguyen, Tien-Thanh Nguyen, Vincent G. H. Eijsink, Thu-Ha Nguyen, Geir Mathiesen, and Clemens K. Peterbauer
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Genetic Vectors ,Bioengineering ,Applied Microbiology and Biotechnology ,law.invention ,Bacterial Proteins ,Bacteriocins ,Bacteriocin ,law ,Inducer ,2. Zero hunger ,chemistry.chemical_classification ,biology ,Research ,Temperature ,food and beverages ,Gene Expression Regulation, Bacterial ,Hydrogen-Ion Concentration ,beta-Galactosidase ,biology.organism_classification ,Recombinant Proteins ,Anti-Bacterial Agents ,Lactobacillus reuteri ,Glucose ,Enzyme ,Biochemistry ,chemistry ,Recombinant DNA ,Fermentation ,Heterologous expression ,Lactobacillus plantarum ,Biotechnology - Abstract
Background: Two overlapping genes lacL and lacM (lacLM) encoding for heterodimeric β-galactosidase from Lactobacillus reuteri were previously cloned and over-expressed in the food-grade host strain Lactobacillus plantarum WCFS1, using the inducible lactobacillal pSIP expression system. In this study, we analyzed different factors that affect the production of recombinant L. reuteri β-galactosidase. Results: Various factors related to the cultivation, i.e. culture pH, growth temperature, glucose concentration, as well as the induction conditions, including cell concentration at induction point and inducer concentration, were tested. Under optimal fermentation conditions, the maximum β-galactosidase levels obtained were 130 U/mg protein and 35–40 U/ml of fermentation broth corresponding to the formation of approximately 200 mg of recombinant protein per litre of fermentation medium. As calculated from the specific activity of the purified enzyme (190 U/mg), β-galactosidase yield amounted to roughly 70% of the total soluble intracellular protein of the host organism. It was observed that pH and substrate (glucose) concentration are the most prominent factors affecting the production of recombinant β-galactosidase. Conclusions: The over-expression of recombinant L. reuteri β-galactosidase in a food-grade host strain was optimized, which is of interest for applications of this enzyme in the food industry. The results provide more detailed insight into these lactobacillal expression systems and confirm the potential of the pSIP system for efficient, tightly controlled expression of enzymes and proteins in lactobacilli.
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216. The role of nutritional risk evaluation in predicting adverse outcomes among patients with severe COVID-19 in Vietnam
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Lan Huong Thi Nguyen, Anh Kim Dang, Tien Viet Tran, Hai Thanh Phan, Dao Anh Thi Doan, Lien Bao Thi Nguyen, Anh Minh Tran, Tung Dinh Do, Thang Ba Nguyen, Tien Thanh Nguyen, Binh Huy Nguyen, and Huong Thi Le
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nutritional status ,COVID-19 ,Vietnam ,Nutritional Risk Screening (NRS) ,The Global Leadership Initiative on Malnutrition (GLIM) ,Prognostic Nutritional Index (PNI) ,Nutrition. Foods and food supply ,TX341-641 - Abstract
IntroductionAs sufficient nutrition helps alleviate catabolic stress and modulate the systemic inflammatory response of the body, it plays an indispensable role in the good prognosis of critically ill patients. Thus, this study aimed to investigate the malnutrition of patients with severe COVID-19 and its association with adverse treatment outcomes.MethodsWe conducted a retrospective cross-sectional study in two provincial hospitals in Hanoi from February to April 2022. Participants were patients with severe COVID-19 admitted to the Intensive Care Unit (ICU). Malnutrition risk were evaluated by Nutritional Risk Screening-2002 (NRS), Global Leadership Initiative on Malnutrition (GLIM), Prognostic Nutritional Index (PNI), and the adverse prognosis was assessed by Acute Physiology and Chronic Health Evaluation II (APACHE II). The multivariate receiver-operating characteristic (ROC) curve was applied to estimate the predictive ability of those criteria regarding worse treatment results.ResultsThe percentages of malnutrition measured by NRS, GLIM, PNI, and BMI were 62.6, 51.5, 42.9, and 16.6%, respectively. Patients with more severe malnutrition assessed by GLIM, PNI, and having above target fasting blood glucose (FBG) (≥10.0 mmol/L) were more likely to have higher APACHE scores. PNI had a better diagnostic performance than NRS and BMI (AUC = 0.84, 0.81, and 0.82, respectively). In addition, FBG revealed a good prognostic implication (AUC = 0.84).ConclusionA relatively high percentage of patients experienced moderate and severe malnutrition regardless of screening tools. Individuals at higher risk of malnutrition and high FBG were predicted to have more adverse treatment outcomes. It is recommended that nutritional screening should be conducted regularly, and personalizing nutritional care strategies is necessary to meet patients’ nutrient demands and prevent other nutrition-related complications.
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- 2023
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217. Curcuminoid Co-Loading Platinum Heparin-Poloxamer P403 Nanogel Increasing Effectiveness in Antitumor Activity
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Ngoc The Nguyen, Quynh Anh Bui, Hoang Huong Nhu Nguyen, Tien Thanh Nguyen, Khanh Linh Ly, Ha Le Bao Tran, Vu Nguyen Doan, Tran Thi Yen Nhi, Ngoc Hoa Nguyen, Ngoc Hao Nguyen, Ngoc Quyen Tran, and Dinh Trung Nguyen
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poloxamer P403 ,multi-drug delivery ,heparin ,MCF-7 ,nanogel ,Science ,Chemistry ,QD1-999 ,Inorganic chemistry ,QD146-197 ,General. Including alchemy ,QD1-65 - Abstract
Nanosized multi-drug delivery systems provide synergistic effects between drugs and bioactive compounds, resulting in increased overall efficiency and restricted side effects compared to conventional single-drug chemotherapy. In this study, we develop an amphiphilic heparin-poloxamer P403 (HP403) nanogel that could effectively co-load curcuminoid (Cur) and cisplatin hydrate (CisOH) (HP403@CisOH@Cur) via two loading mechanisms. The HP403 nanogels and HP403@CisOH@Cur nanogels were closely analyzed with 1H-NMR spectroscopy, FT-IR spectroscopy, TEM, and DLS, exhibiting high stability in spherical forms. In drug release profiles, accelerated behavior of Cur and CisOH at pH 5.5 compared with neutral pH was observed, suggesting effective delivery of the compounds in tumor sites. In vitro studies showed high antitumor activity of HP403@CisOH@Cur nanogels, while in vivo assays showed that the dual-drug platform prolonged the survival time of mice and prevented tail necrosis. In summary, HP403@CisOH@Cur offers an intriguing strategy to achieve the cisplatin and curcumin synergistic effect in a well-designed delivery platform that increases antitumor effectiveness and overcomes undesired consequences caused by cisplatin in breast cancer treatment.
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- 2022
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218. ELEMENTLERİN JEOKİMYASAL BİRLİKLERİNDE UZAMSAL KÜME VE AYKIRI DEĞERLERİN BELİRLENMESİ: JUIRUI BAKIR MADENİ BÖLGESİNDEN BİR ÖRNEK
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Tien Thanh NGUYEN, Danh Tuyen VU, Le Hung TRINH, and Thi Le Hang NGUYEN
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Spatial Outliers ,Spatial Clusters ,Spatial Variability ,Local Moran Statistic ,Geochemistry ,Uzamsal Aykırı Değer ,Uzamsal Kümeler ,Uzamsal Değişkenlik ,Yersel Moran İstatistiği ,Jeokimya ,Mineralogy ,QE351-399.2 - Abstract
Jeokimyasal verilerin saha dağılım desenlerinin belirlenmesi çalışmalarında uzamsal küme ve aykırı değerler büyük önem taşır. Bunlar, sadece cevherleşmenin temel özelliklerini değil, aynı zamanda maden yatağının ve cevher mineralinin alansal dağılımını da karakterize ederler. Bu çalışmada, çok değişkenli verinin alansal dağılım deseni konusunda yeni bir yöntem tanıtılacak olup bu yöntemde stabil Mahalanobis uzaklığı ile lokal Moran’s I1 değeri baz alınmıştır. Uzamsal matriksi oluştururken, aralığı belirlemek üzere öncelikle Moran’s I uzamsal korelogramı kullanılmıştır. Daha sonra, belirli bir elementler topluluğu için stabil Mehalanobis aralığı hesaplanmıştır. Son olarak, hem uzamsal birlik derecesini ölçmek hem de, uzamsal küme ve aykırı değerler dahil olmak üzere Cu, Au, Mo, Ag, Pb, Zn, As ve Sb birliklerinin uzamsal dağılım desenlerini belirlemek için yersel Moran’s I1 istatistiği uygulanmıştır. Hem ham veri hem de Box-Cox dönüşüm verisi üzerinde altı değişik ölçekte (2km, 4km, 6km, 8km, 10km ve 12km) uzamsal desen analizi yapılmıştır. Elde edilen sonuçlar, Moran’s I1 ve stabil Mahalanobis ile tanımlanan uzamsal küme ve uzamsal aykırı değer alanlarının nesnel gerçeklik ile uyum sağladıklarını, ayrıca çalışma alanında bilinen maden yatakları ile de uyumlu bir ilişki gösterdiklerini ortaya koymuştur.
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- 2016
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219. Simultaneous liquefaction, saccharification and fermentation at very high gravity of rice at pilot scale for potable ethanol production and distillers dried grains composition.
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Son Chu-Ky, Thi-Hoan Pham, Kim-Lien T. Bui, Tien-Thanh Nguyen, Kim-Dang Pham, Hoai-Duc T. Nguyen, Hong-Nga Luong, Viet-Phu Tu, Thanh-Hang Nguyen, Phu-Ha Ho, and Thanh-Mai Le
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FERMENTATION , *RICE processing , *LIQUEFACTION (Physics) , *ETHANOL , *AMYLASES - Abstract
In this work, a simultaneous liquefaction, saccharification, and fermentation (SLSF) process at very high gravity (VHG) of broken rice for potable ethanol production was developed at pilot scale. The SLSF-VHG process was performed in a unique fermenter, at 30 °C. Rice flour (RF) was dissolved in tap water to reach 311.5 g/1 dry matter and then the mixture was simul-taneousely liquefied, saccharified, and fermented. Thanks to the addition of a raw starch hydrolyzing enzyme containing a mixture of alpha-amylase and gluco-amylase (Stargen 002 at 991.8 GAU/kg RF), gluco-amylase (Amigase Mega L at 0.035% w/w), protease (Fermgen at 600 SAPU/kg RF), active dry yeast Saccharomyces cereuisiae (Red Ethanol at 3.5 x 107 cells/ml), KH2PO4 (4.8mM), and urea (16.0 mM). Under these conditions, the SLSF-VHG process finished after 120 h and achieved an ethanol content of 17.6% v/v corresponding to 86.3% of the theoretical ethanol yield. We scaled up this SLSF process at very high gravity at pilot scale (251) and achieved an ethanol content of 17.0% v/v corresponding to a yield of 83.2% of the theoretical ethanol yield. Rice-based distillers dried grains (DDG) was produced from the whole stillage of SLSF process at very high gravity by being plate-filtered and dried. The obtained DDG had high contents of crude protein (47.5%) and fibers (15.8%). Our results suggest, the SLSF under VHG condition of broken rice as well as the recovery of protein-rich DDG could have a great potential for the ethanol and animal feeding industry in Vietnam. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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