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FLAT-PLATE MICROFILTRATION MEMBRANE BIOREACTOR DESIGNED FOR ULTIMATE NUTRIENT REMOVAL (UNR™)

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Increasing concerns for sensitive receiving water are expected to drive effluent nitrogen (N) and phosphorus (P) limits to exceptionally low levels for many wastewater treatment plants throughout the U.S (< 0.1 mg TP/L and < 3-5 mg TN/L). Meeting these limits will require a new generation of effective treatment strategies to control both soluble and nonsoluble discharges. This paper will discuss the development and the evaluation of a flatplate microfiltration membrane bioreactor (MBR) technology designed for highly effective nitrogen and phosphorous removal using combined biological and chemical processes. Since 1990, approximately 1,500 wastewater treatment plants worldwide have successfully utilized this MBR technology to consistently produce water that exceeds most reuse quality standards.

Such MBR configurations have been demonstrated to achieve very low nutrient concentrations, in part because membrane systems provide a nearly complete removal of effluent solids and the nutrients they contain. Such systems provide the added benefits of nearly complete removal of bacterial pathogens, and even some viruses. These characteristics make the MBRs ideal components of water reuse systems, which will likely ensure their increased use.
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Document Type: Research Article

Publication date: 2004-01-01

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