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Sludge cycling between aerobic, anoxic and anaerobic regimes to reduce sludge production during wastewater treatment: Performance, mechanisms, and implications

Journal Article


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Abstract


  • Alternate cycling of sludge in aerobic, anoxic, and anaerobic regimes is a promising strategy that can

    reduce the sludge yield of conventional activated sludge (CAS) by up to 50% with potentially lower capital

    and operating cost than physical- and/or chemical-based sludge minimisation techniques. The mechanisms

    responsible for reducing sludge yield include alterations to cellular metabolism and feeding behaviour

    (metabolic uncoupling, feasting/fasting, and endogenous decay), biological floc destruction, and

    predation on bacteria by higher organisms. Though discrepancies across various studies are recognisable,

    it is apparent that sludge retention time, oxygen-reduction potential of the anaerobic tank, temperature,

    sludge return ratio and loading mode are relevant to sludge minimisation by sludge cycling approaches.

    The impact of sludge minimisation on CAS operation (e.g., organics and nutrient removal efficiency and

    sludge settleability) is highlighted, and key areas requiring further research are also identified.

Authors


  •   Semblante, Galilee U. (external author)
  •   Hai, Faisal I.
  •   Ngo, Hao H. (external author)
  •   Guo, Wenshan (external author)
  •   You, Sheng-Jie (external author)
  •   Price, William E.
  •   Nghiem, Long D. (external author)

Publication Date


  • 2014

Citation


  • Semblante, G., Hai, F. Ibney., Ngo, H. H., Guo, W., You, S., Price, W. E. & Nghiem, L. D. (2014). Sludge cycling between aerobic, anoxic and anaerobic regimes to reduce sludge production during wastewater treatment: Performance, mechanisms, and implications. Bioresource Technology, 155 395-409.

Scopus Eid


  • 2-s2.0-84899065309

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3305&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/2296

Has Global Citation Frequency


Number Of Pages


  • 14

Start Page


  • 395

End Page


  • 409

Volume


  • 155

Place Of Publication


  • Netherlands

Abstract


  • Alternate cycling of sludge in aerobic, anoxic, and anaerobic regimes is a promising strategy that can

    reduce the sludge yield of conventional activated sludge (CAS) by up to 50% with potentially lower capital

    and operating cost than physical- and/or chemical-based sludge minimisation techniques. The mechanisms

    responsible for reducing sludge yield include alterations to cellular metabolism and feeding behaviour

    (metabolic uncoupling, feasting/fasting, and endogenous decay), biological floc destruction, and

    predation on bacteria by higher organisms. Though discrepancies across various studies are recognisable,

    it is apparent that sludge retention time, oxygen-reduction potential of the anaerobic tank, temperature,

    sludge return ratio and loading mode are relevant to sludge minimisation by sludge cycling approaches.

    The impact of sludge minimisation on CAS operation (e.g., organics and nutrient removal efficiency and

    sludge settleability) is highlighted, and key areas requiring further research are also identified.

Authors


  •   Semblante, Galilee U. (external author)
  •   Hai, Faisal I.
  •   Ngo, Hao H. (external author)
  •   Guo, Wenshan (external author)
  •   You, Sheng-Jie (external author)
  •   Price, William E.
  •   Nghiem, Long D. (external author)

Publication Date


  • 2014

Citation


  • Semblante, G., Hai, F. Ibney., Ngo, H. H., Guo, W., You, S., Price, W. E. & Nghiem, L. D. (2014). Sludge cycling between aerobic, anoxic and anaerobic regimes to reduce sludge production during wastewater treatment: Performance, mechanisms, and implications. Bioresource Technology, 155 395-409.

Scopus Eid


  • 2-s2.0-84899065309

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3305&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/2296

Has Global Citation Frequency


Number Of Pages


  • 14

Start Page


  • 395

End Page


  • 409

Volume


  • 155

Place Of Publication


  • Netherlands