Effects of the acidogenic biomass on the performance of an anaerobic membrane bioreactor for wastewater treatment |
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| Authors: | David Jeison Caroline M Plugge Alcina Pereira Jules B van Lier |
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| Institution: | 1. Sub-department of Environmental Technology, Wageningen University, Bomenweg 2, P.O. Box 8129, 6700 EV Wageningen, The Netherlands;2. Chemical Engineering Department, Universidad de La Frontera, Casilla 54 D, Temuco, Chile;3. Laboratory of Microbiology, Wageningen University, Dreijenplein 10 6703 HB Wageningen, The Netherlands;4. Wetsus, Centre for Sustainable Water Technology, Agora 1, P.O. Box 1113, 8900 CC Leeuwarden, The Netherlands;1. Department of Civil and Architectural Engineering, University of Pavia, via Ferrata 1, 27100 Pavia, Italy;2. Department of Civil, Environmental, Architectural Engineering and Mathematics, University of Brescia, via Branze 43, 25123 Brescia, Italy;3. Department of Earth and Environment Sciences, University of Pavia, via Ferrata 1, 27100 Pavia, Italy;1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, PR China;2. Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, Japan;3. Department of Environmental Science, Graduate School of Environmental Studies, Tohoku University, Japan;1. CDM Smith, 14432 SE Eastgate Way, Suite 100, Bellevue, WA 98007, USA;2. Kansas State University, Department of Civil Engineering, 1701 C. Platt. St., 2118 Fiedler Hall, Manhattan, KS 66506-5000, USA;3. Inha University, Department of Environmental Engineering, Nam-gu, Inharo 100, Republic of Korea;4. Stanford University, Department of Civil and Environmental Engineering, 473 Via Ortega, Stanford, CA 94305, USA |
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| Abstract: | Continuous flow experiments were performed to study the effects of acidogenic biomass development, induced by feeding with non-acidified substrate, on the operation and performance of an anaerobic membrane bioreactor (AnMBR). The AnMBR was operated at cross-flow velocities up to 1.5 m/s and fed with a gelatine–starch–ethanol mixture. A significant fraction of acidogenic biomass developed during reactor operation, which fully determined the sludge rheology, and influenced the particle size distribution. As a result, flux levels of only 6.5 l/m2 h were achieved, at a liquid superficial velocity of 1.5 m/s. Even though the soluble microbial products levels in the AMBR were as high as 14 g COD/l, the observed hydraulic flux was not limited by irreversible pore fouling, but by reversible cake layer formation. Propionate oxidation was the limiting step for the applied organic loading rate. The assessed specific methanogenic activity (SMA) with propionate as substrate was, however, similar to the values found by others during thermophilic treatment of non or partially acidified substrates in granular sludge bed reactors, indicating an appropriate level of the propionate oxidation capacity. |
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