Abstract
Characterization of highly concentrated activated sludge in high strength fermentation wastewater treatment coupled with UF membrane is presented. High TOC and NH4-N removal efficiencies were obtained by this process. Specific nitrification rate in continuous experiment was found to have the same trend as that in batch experiment, and specific denitrification rate in continuous experiment was much lower than that in batch experiment. Specific oxygen utilization rate and specific INT-dehydrogenase activity of sludge decreased slightly, however, the volumetric activities of both increased remarkably with the increase of MLVSS. The filamentous bacteria were predominant at lower MLSS and coccus-like or rod-type bacteria at higher MLSS.
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