Study on enhanced biological phosphorus removal using membrane bioreactor at different sludge retention times
by Zhichao Zhang, Xia Huang
International Journal of Environment and Pollution (IJEP), Vol. 45, No. 1/2/3, 2011

Abstract: An enhanced biological phosphorus removal process coupled with membrane bioreactor was proposed. Four runs were operated at different Sludge Retention Times (SRTs) of 20, 30, 40 and 50 d. Although average phosphorus removal tended to drop with SRT, the total phosphorus removal over 85% could be still achieved if the SRT was maintained under 40 d. Phosphorus-content in the sludge increased with SRT, but has a limit of around 5.6–5.8% mgP/gMLSS. Extracellular Polymeric Substances (EPSs) are a pool for phosphorus stored. Phosphorus-content in the EPS per EPS increased as the SRT increased.

Online publication date: Wed, 16-Mar-2011

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