Abstract
The hydrolysis of settleable substrate in domestic sewage was evaluated using its O2 utilization rate profile generated in an aerated batch reactor. The hydrolysis rate coefficient was 1.2 d−1, significantly lower than 3.8 d−1 and 1.9 d−1 characterizing soluble and suspended slowly biodegradable fractions. The settled portion of the sewage incorporated an active biomass fraction of 1560 mg COD l−1 that needed to be accounted for in the hydrolysis kinetics. The texture of the biomass/settled substrate mixture and the gradual hydrolysis of the particulate substrate within the floc structure were examined by microscopic analysis.
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Okutman, D., Övez, S. & Orhon, D. Hydrolysis of settleable substrate in domestic sewage. Biotechnology Letters 23, 1907–1914 (2001). https://doi.org/10.1023/A:1013737901624
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DOI: https://doi.org/10.1023/A:1013737901624