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Biosolids reduction by the oxic-settling-anoxic process: impact of sludge interchange rate

Journal Article


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Abstract


  • The impact of sludge interchange rate (SIR) on sludge reduction by oxic-settling-anoxic (OSA) process was investigated. The sludge yield of an OSA system (a sequencing batch reactor, SBR, integrated with external anoxic reactors) was compared to that of a control (an SBR attached to a single-pass aerobic digester). SIR (%) is the percentage by volume of sludge returned from the external reactor into the main bioreactor of the OSA, and was varied from 0-22%. OSA achieved greater sludge reduction when fed with unsettled sewage (sCOD=113 mg/L) rather than settled sewage (sCOD=60 mg/L). The SIR of 11% resulted in the highest OSA performance. At the optimum SIR, higher volatile solids destruction and nitrification/denitrification (i.e., conversion of destroyed volatile solids into inert forms) were observed in the external anoxic and intermittently aerated (i.e., aerobic/anoxic) reactors, respectively. Denitrification in the aerobic/anoxic reactor was inefficient without SIR. Effluent quality and sludge settleability were unaffected by SIR.

Authors


  •   Semblante, Galilee U. (external author)
  •   Hai, Faisal I.
  •   Bustamante, Heriberto A. (external author)
  •   Guevara, Nelly (external author)
  •   Price, William E.
  •   Nghiem, Long D. (external author)

Publication Date


  • 2016

Citation


  • Semblante, G. U., Hai, F. I., Bustamante, H. A., Guevara, N., Price, W. E. & Nghiem, L. D. (2016). Biosolids reduction by the oxic-settling-anoxic process: impact of sludge interchange rate. Bioresource Technology, 210 167-173.

Scopus Eid


  • 2-s2.0-84955258473

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=6573&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/5545

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 167

End Page


  • 173

Volume


  • 210

Place Of Publication


  • Netherlands

Abstract


  • The impact of sludge interchange rate (SIR) on sludge reduction by oxic-settling-anoxic (OSA) process was investigated. The sludge yield of an OSA system (a sequencing batch reactor, SBR, integrated with external anoxic reactors) was compared to that of a control (an SBR attached to a single-pass aerobic digester). SIR (%) is the percentage by volume of sludge returned from the external reactor into the main bioreactor of the OSA, and was varied from 0-22%. OSA achieved greater sludge reduction when fed with unsettled sewage (sCOD=113 mg/L) rather than settled sewage (sCOD=60 mg/L). The SIR of 11% resulted in the highest OSA performance. At the optimum SIR, higher volatile solids destruction and nitrification/denitrification (i.e., conversion of destroyed volatile solids into inert forms) were observed in the external anoxic and intermittently aerated (i.e., aerobic/anoxic) reactors, respectively. Denitrification in the aerobic/anoxic reactor was inefficient without SIR. Effluent quality and sludge settleability were unaffected by SIR.

Authors


  •   Semblante, Galilee U. (external author)
  •   Hai, Faisal I.
  •   Bustamante, Heriberto A. (external author)
  •   Guevara, Nelly (external author)
  •   Price, William E.
  •   Nghiem, Long D. (external author)

Publication Date


  • 2016

Citation


  • Semblante, G. U., Hai, F. I., Bustamante, H. A., Guevara, N., Price, W. E. & Nghiem, L. D. (2016). Biosolids reduction by the oxic-settling-anoxic process: impact of sludge interchange rate. Bioresource Technology, 210 167-173.

Scopus Eid


  • 2-s2.0-84955258473

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=6573&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/5545

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 167

End Page


  • 173

Volume


  • 210

Place Of Publication


  • Netherlands