EPS and SMP dynamics at different heights of a submerged anaerobic membrane bioreactor (SAMBR) |
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| Institution: | 1. Environmental Engineering Research Center (CIIA), Universidad de los Andes, Bogotá, Colombia;2. Post-Graduate Programme in Environmental Engineering, Federal University of Ouro Preto, Ouro Preto, Brazil;3. Chemistry Department, Federal University of Ouro Preto, Ouro Preto, Brazil;1. Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, PR China;2. Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan;3. Sewerage Works Division, Sewerage and Wastewater Management Department, Water and Disaster Management Bureau, 2-1-3 Kasumigaseki, Chiyodaku, Tokyo, Japan;1. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin 150090, China;2. School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China;3. School of Marine Science and Technology, Harbin Institute of Technology, Weihai 264200, China;1. University of Tlemcen, Automatics Laboratory, BP 119, Tlemcen 13000, Algeria;2. Project Modemic, Inra/Inria, UMR Mistea, 2 place Pierre Viala, 34060 Montpellier, France;3. Irstea, UMR Itap, 361 rue Jean-François Breton, 34196 Montpellier, France;4. INRA, UR050, Laboratory of Environmental Biotechnology, Avenue des Etangs, Narbonne F-11100, France;1. Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia;2. Department of Environmental Energy & Engineering, Kyonggi University, Republic of Korea;3. Faculty of Environment and Natural Resources, University of Technology, Vietnam National University-Ho Chi Minh, District 10, Ho Chi Minh City Vietnam;4. State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China |
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| Abstract: | Membrane bioreactors (MBR) technology for wastewater offers many advantages over conventional technologies such as high effluent quality, less footprint and others. The main disadvantage of membrane bioreactors (MBR) is related to membrane fouling, which is mainly caused by extracellular polymeric substance (EPS) and soluble microbial products (SMP). This research studied EPS and SMP dynamics at different heights of a submerged anaerobic membrane bioreactor (SAMBR). The SAMBR was operated under two organic loading rates (OLR) (0.79 and 1.56 kg/m3 d) and was fed with synthetic wastewater with glucose as the carbon source. The results showed percentages of chemical oxygen demand (COD) removal above 95% and the highest COD removal rates were observed at the bottom of the reactor (>83%) for both OLR. The EPS showed a stratification with highest quantities in the supernatant. For the SMP the highest concentration was in the bottom of SAMBR where utilization predominated associated products whereas in the SAMBR supernatant predominated biomass associated products. The OLR change led to a significant increase in SMP accumulation but not in EPS. These facts showed that EPS and SMP dynamic in the SAMBR seemed to be mainly influenced by biological activity, total suspended solids concentration and substrate composition. |
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| Keywords: | Soluble microbial product (SMP) Extracellular polymeric substances (EPS) Membrane bioreactor (MBR) Fouling Anaerobic digestion |
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