Anaerobic treatment of baker's yeast wastewater: I. Start-up and sodium molybdate addition |
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| Institution: | 1. Key Laboratory of Food Nutrition and Safety, Ministry of Education, College of Food Engineering and Biotechnology, Institute for New Rural Development, Tianjin University of Science and Technology, Tianjin 300457, PR China;2. Beijing Laboratory for Food Quality and Safety, Beijing Technology and Business University, Beijing 100048, PR China;3. College of Biosystems Engineering and Food Science, Fuli Institute of Food Science, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang University, Hangzhou 310058, PR China;1. Synthetic Biology and Bioengineering Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, Republic of Korea;2. Biosystems and Bioengineering Program, University of Science and Technology (UST), Daejeon, Republic of Korea;1. Department of Dermatology, The Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, Heilongjiang Province, China;2. Department of Cardiology, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, Heilongjiang Province, China;3. Institute of Dermatology of Heilongjiang Province, Harbin, 150001, Heilongjiang Province, China;1. State Key Laboratory of Rice Biology, Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, 310058, Hangzhou, China;2. Department of Crop Protection, Federal University of Agriculture Abeokuta, Abeokuta, Nigeria;3. Department of Plant Quarantine, Shanghai Extension and Service Center of Agriculture Technology, Shanghai 201103, China;4. State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, 310021, Hangzhou, China;1. School of Resources and Environment, University of Electronic Science and Technology of China, P.O. Box 611731, Xiyuan Ave, Chengdu, PR China;2. Center of Excellence in Electrochemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran;3. Biosensor Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran;4. School of Chemistry, College of Science, University of Tehran, Tehran, Iran;5. Department of Chemistry, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran;6. Department of Applied Chemistry, Faculty of Chemistry, Kharazmi University, Tehran, Iran;7. Department of Chemical Engineering, College of Engineering and Technology, American University of Middle East, Egaila, Kuwait;8. Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran;10. Department of Environmental Engineering, Istanbul Technical University, 34467, Istanbul, Turkey;11. National Research Center on Membrane Technologies, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey |
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| Abstract: | The anaerobic treatment of baker's yeast wastewater was studied using an anaerobic biological contact reactor (AnRBC) and a fixed-film reactor. The AnRBC had an active biomass developed within the reactor before this study commenced; however, the fixed-film reactor was started without attached biomass in a support structure. The gas production rates obtained for the AnRBC were between 0·55 and 0·61 litre methane per litre reactor per day. However, a gas production rate of only 0·46 litre methane per litre reactor per day was achieved after a four-month operating period for the fixed-film reactor. Higher chemical oxygen demand reduction was also found in the AnRBC. The results indicated that the presence of high sulfate concentration in baker's yeast wastewater affected teh start-up process. The reactor with fully developed active biomass was less susceptible to sulfate inhibition and showed improved anaerobic digestion. Results indicate that the reactor should be innoculated by feeding nutrient-balanced substrate before it was subjected to the digestion of baker's yeast wastewater. The fixed-film reactor was also fed with the substrate contianing sodium molybdate, an inhibitor of sulfate-reducing bacteria. The results indicated that both methanogenic and sulfate-reducing bacteria were inhibited. |
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