Hydrolysis of settleable substrate in domestic sewage

Okutman D., Övez S., Orhon D.

BIOTECHNOLOGY LETTERS, cilt.23, sa.23, ss.1907-1914, 2001 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 23 Sayı: 23
  • Basım Tarihi: 2001
  • Doi Numarası: 10.1023/a:1013737901624
  • Dergi Adı: BIOTECHNOLOGY LETTERS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1907-1914
  • Anahtar Kelimeler: domestic sewage, hydrolysis, modeling, O-2 uptake rate, settleable substrate, SLOWLY BIODEGRADABLE SUBSTRATE, ACTIVATED-SLUDGE PROCESS, WASTE-WATER, GENERAL-MODEL, SYSTEMS, BIOMASS
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

The hydrolysis of settle able substrate in domestic sewage was evaluated using its O-2 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.