Sludge Thickening Valley Center, California CASE STUDY RO | NF | UF | MF 0 50 100 150 200 MBT Filters Belt press Rotary drum 1 of 2 Cost-effective Sludge Thickening Processor using MEMBRAYTM Membrane Bioreactor at Valley Center, California OVERVIEW The Valley Center Municipal Water District (VCMWD) operates two wastewater treatment facilities in Valley Center, which is located in the northern part of San Diego County, California. These two sites are the Lower Moosa Canyon and the Woods Valley Ranch Water Reclamation Facilities (WRF). Both WRF's incorporated an in-house membrane thickener (MBT) design and selected Toray's MEMBRAYTM Membrane Bioreactor (MBR) modules for the process. VCMWD's objectives were to conserve water and meet the Regional Water Quality Control Board's

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