An upflow microaerobic sludge blanket reactor operating at high organic loading and low dissolved oxygen levels |
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Authors: | Shaokui Zheng Huijun Li Cancan Cui |
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Institution: | (1) MOE Key Laboratory of Water and Sediment Sciences/State Key Lab of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China |
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Abstract: | The activated sludge process (ASP) has high operational costs due to the need for aeration at dissolved O2 (DO) levels of ≥2 mg l−1 and high capital costs to construct large reactors due to a low organic loading typically 1 kg chemical oxygen demand (COD) m−3 day−1]. A novel method for improving the energy use and treatment efficiency of the ASP via limited oxygenation (0.4 mg DO l−1) and high organic loading (6.2 kg COD m−3 day−1) is proposed based on a laboratory-scale ASP for ammonia-rich industrial wastewaters. The sludge blanket phenomenon and granulation
occurred simultaneously in the upflow microaerobic reactor. |
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