Abstract

Extracellular polymeric substances (EPS) and solids concentrations in samples from the Interchange Bioreactor (IBR), and return activated sludge (RAS) from Cannibal facilities having low and high sludge yields, were analyzed to understand the mechanisms behind low sludge production. Low sludge yields correlated to more EPS degradation, higher concentrations of iron, and reducing conditions in the IBR. In the low yield facilities, iron was reduced when the RAS passed through the anaerobic and reducing conditions of the IBR, and this led to more EPS solubilization and degradation. This ''futile cycle'' of EPS production and degradation appears to may have been most responsible for reducing sludge yields.

Original languageEnglish (US)
Pages (from-to)42-47
Number of pages6
JournalWater Environment Research
Volume90
Issue number1
DOIs
StatePublished - Jan 1 2018

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Interchanges
Bioreactors
sludge
bioreactor
Degradation
Iron
degradation
activated sludge
iron
solubilization

Keywords

  • Anaerobic
  • Extracellular polymeric substances
  • Iron
  • Reducing conditions.
  • Sludge reduction

ASJC Scopus subject areas

  • Environmental Chemistry
  • Water Science and Technology

Cite this

Determining the mechanism for low sludge yields in the cannibal solids reduction system. / Van Ginkel, Steven W.; Miceli, Joseph; Kim, Bi O.; Yang, Ziming; Young, Michelle; Marcus, Andrew; Rittmann, Bruce.

In: Water Environment Research, Vol. 90, No. 1, 01.01.2018, p. 42-47.

Research output: Contribution to journalArticle

Van Ginkel, Steven W. ; Miceli, Joseph ; Kim, Bi O. ; Yang, Ziming ; Young, Michelle ; Marcus, Andrew ; Rittmann, Bruce. / Determining the mechanism for low sludge yields in the cannibal solids reduction system. In: Water Environment Research. 2018 ; Vol. 90, No. 1. pp. 42-47.
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