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 1-1 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.
Original language | English |
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Pages (from-to) | 1907-1914 |
Number of pages | 8 |
Journal | Biotechnology Letters |
Volume | 23 |
Issue number | 23 |
DOIs | |
Publication status | Published - 2001 |
Keywords
- Domestic sewage
- Hydrolysis
- Modeling
- O uptake rate
- Settleable substrate