Hydrolysis of settleable substrate in domestic sewage

Didem Okutman, Süleyman Övez, Derin Orhon*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

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 languageEnglish
Pages (from-to)1907-1914
Number of pages8
JournalBiotechnology Letters
Volume23
Issue number23
DOIs
Publication statusPublished - 2001

Keywords

  • Domestic sewage
  • Hydrolysis
  • Modeling
  • O uptake rate
  • Settleable substrate

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