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UF Membranes for the Achievement of Limit of Technology Effluent Phosphorous Concentrations

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Membrane ultrafiltration (UF) technology, applied in either a membrane bioreactor (MBR) or tertiary filtration configuration, has proven reliable to produce solids free effluent and thus is an ideal solution to meet low effluent phosphorous requirements. This paper presents the operation data of an MBR pilot and a tertiary filtration pilot treating municipal wastewater with the objective of meeting limit of technology effluent phosphorous concentrations. The MBR pilot combined a biological phosphorous removal process with simultaneous chemical precipitation to achieve effluent TP < 0.025 mg/L, while the tertiary filtration pilot with enhanced chemical coagulation aimed at effluent TP < 0.024 mg/L and < 0.01 mg/L ultimately. For the MBR, the process functionality of luxury biological phosphorous uptake is analyzed. The limitation of analytical techniques and process optimization to achieve effluent TP concentrations of < 0.01 mg/L are also discussed.
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Keywords: Phosphorous removal; membrane bioreactor; tertiary filtration; ultrafiltration

Document Type: Research Article

Publication date: 01 January 2010

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