Sludge reduction during brewery wastewater treatment by hydrolyzation-food chain reactor system |
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Authors: | Lijie LI Qunhui WANG Xuesong LI Shuo YANG |
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Institution: | (1) Department of Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China;(2) Department of Environmental Science & Engineering, Harbin Institute of Technology, Harbin, 150090, China |
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Abstract: | During brewery wastewater treatment by a hydrolyzation-food chain reactor (FCR) system, sludge was recycled to the anaerobic
segment. With the function of hydrolyzation acidification in the anaerobic segment and the processes of aerobic oxidation
and antagonism, predation, interaction and symbiosis among microbes in multilevel oxidation segment, residual sludge could
be reduced effectively. The 6-month dynamic experiments show that the average chemical oxygen demand (COD) removal ratio was
92.6% and average sludge production of the aerobic segment was 8.14%, with the COD of the influent at 960–1720 mg/L and hydraulic
retention time (HRT) of 12 h. Since the produced sludge could be recycled and hydrolyzed in the anaerobic segment, no excess
sludge was produced during the steady running for this system. |
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Keywords: | hydrolyzation multilevel oxidation excess sludge reduction |
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