Anaerobic treatment of wastewater with high organic content using a stirred tank reactor coupled with a membrane filtration unit |
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Authors: | Fuchs W Binder H Mavrias G Braun R |
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Affiliation: | IFA-Tulln, Department of Environmental Biotechnology, Konrad Lorenz Strasse 20, 3430, Tulln, Austria. fuchs@ifa-tullin.ac.at |
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Abstract: | Using a cross-flow membrane bioreactor, high anaerobic conversion rates of three different types of wastewater with varying organic content were achieved. Loading rates obtained were as follows: 20 g CODL(-1) x d(-1) for artificial wastewater, approximately 8 g CODL(-1) x d(-1) from vegetable processing industry (sauerkraut brine) and 6-8 g CODL(-1) x d(-1) for wastewater from an animal slaughterhouse. At stable conditions, COD-removal rates in all three wastewaters were higher than 90%. Methane yields from the treatment of artificial wastewater, sauerkraut brine, and animal slaughterhouse wastewater were in the range of 0.17-0.30, 0.20-0.34, and 0.12-0.32 L(n) x g(-1) COD(-1) fed, respectively. The complete retention of biomass and suspended solids is a unique feature of this treatment process, which combines a high loading capacity and at the same time, high COD removal rates even for complex wastewater containing high concentrations of particulate matter. |
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Keywords: | Anaerobic digestion Membrane bioreactor Membrane filtration Wastewater treatment |
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