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Effects of sludge retention time on oxic-settling-anoxic process performance: biosolids reduction and dewatering properties

Journal Article


Abstract


  • In this study, the effect of sludge retention time (SRT) on oxic-settling-anoxic (OSA) process was determined

    using a sequencing batch reactor (SBR) attached to external aerobic/anoxic reactors. The SRT of

    the external reactors was varied from 10 to 40 d. Increasing SRT from 10 to 20 d enhanced volatile solids

    destruction in the external anoxic reactor as evidenced by the release of nutrients, however, increasing

    the SRT to 40 d did not enhance volatile solids destruction further. Relatively short SRT (10–20 d)

    favoured the conversion of destroyed solids into inert products. The application of an intermediate SRT

    (20 d) of the external reactor showed the highest sludge reduction performance (>35%). Moreover, at

    the optimum SRT, OSA improved sludge dewaterability as demonstrated by lower capillary suction time

    and higher dewatered cake solids content.

Authors


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

Publication Date


  • 2016

Citation


  • Semblante, G. U., Hai, F. I., Bustamante, H., Price, W. E. & Nghiem, L. D. (2016). Effects of sludge retention time on oxic-settling-anoxic process performance: biosolids reduction and dewatering properties. Bioresource Technology, 218 1187-1194.

Scopus Eid


  • 2-s2.0-84979633578

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/5760

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 1187

End Page


  • 1194

Volume


  • 218

Place Of Publication


  • Netherlands

Abstract


  • In this study, the effect of sludge retention time (SRT) on oxic-settling-anoxic (OSA) process was determined

    using a sequencing batch reactor (SBR) attached to external aerobic/anoxic reactors. The SRT of

    the external reactors was varied from 10 to 40 d. Increasing SRT from 10 to 20 d enhanced volatile solids

    destruction in the external anoxic reactor as evidenced by the release of nutrients, however, increasing

    the SRT to 40 d did not enhance volatile solids destruction further. Relatively short SRT (10–20 d)

    favoured the conversion of destroyed solids into inert products. The application of an intermediate SRT

    (20 d) of the external reactor showed the highest sludge reduction performance (>35%). Moreover, at

    the optimum SRT, OSA improved sludge dewaterability as demonstrated by lower capillary suction time

    and higher dewatered cake solids content.

Authors


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

Publication Date


  • 2016

Citation


  • Semblante, G. U., Hai, F. I., Bustamante, H., Price, W. E. & Nghiem, L. D. (2016). Effects of sludge retention time on oxic-settling-anoxic process performance: biosolids reduction and dewatering properties. Bioresource Technology, 218 1187-1194.

Scopus Eid


  • 2-s2.0-84979633578

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/5760

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 1187

End Page


  • 1194

Volume


  • 218

Place Of Publication


  • Netherlands