Extracellular biological organic matters in sewage sludge during mesophilic digestion at reduced hydraulic retention time

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Liang-Liang Wei
  • Qing-Liang Zhao
  • Kai Hu
  • Chun-Mei Xie
  • Jun-Qiu Jiang

Detail(s)

Original languageEnglish
Pages (from-to)1472-1480
Journal / PublicationWater Research
Volume45
Issue number3
Publication statusPublished - Jan 2011
Externally publishedYes

Abstract

To operate an anaerobic digester at low hydraulic retention time (HRT) is welcome in practice. This study characterized the extracellular biological organic matter (EBOM) and supernatant organics for a sewage sludge digested in a lab-scale mesophilic digester (5 l) running at an HRT of 20, 15 or 10 d. The hydrophilic and hydrophobic acid fractions were the principal components in the sludge EBOM. The hydrolysis rates for hydrophobic acid fraction related EBOM at 10 d HRT and that of hydrophilic fraction related proteins in supernatant at 20 d HRT limited the anaerobic processes. Improved hydrolysis of soluble hydrophilic fraction assisted improving digester performance at 20 d HRT. To shorten digestion HRT, efficiency of hydrophobic acid fraction hydrolysis has to be practiced. © 2010 Elsevier Ltd.

Research Area(s)

  • Anaerobic digestion, Extracellular biological organic matter, Fractionation, Rate-limiting step, Sludge, Supernatant organics

Bibliographic Note

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Citation Format(s)

Extracellular biological organic matters in sewage sludge during mesophilic digestion at reduced hydraulic retention time. / Wei, Liang-Liang; Zhao, Qing-Liang; Hu, Kai et al.
In: Water Research, Vol. 45, No. 3, 01.2011, p. 1472-1480.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review