MEMBRANE BIOLOGICAL PRETREATMENT OF COMBINED INDUSTRIAL WASTEWATER
Abstract:In 1998, New Jersey's Mount Holly Municipal Utilities Authority commissioned Envirogen, Inc. to perform an investigation of alternatives for the biological treatment of industrial waste streams being processed by their publicly owned treatment works. These streams included: landfill leachate, truck wash water and the waste water from restaurant grease traps. The objective of the investigations was to identify a process that would effectively pretreat these wastes, prior to their discharge to the Authority's wastewater treatment plant.
The results of this program was a series of treatability studies using both fluidized bed reactors (FBR) and membrane biological reactors (MBR). Based upon anticipated flows from the major sources, it was determined that the flow would consist of 88 % (v/v) of landfill leachate, 5 % (v/v) of grease trap waste water and 7 % (v/v) of truck wash water. The average COD was 11,900 mg/L, TOC 1,400 mg/L and TSS was 2,800 mg/L.
As a result of the investigations it was determined that a membrane bioreactor would effectively treat the wastes. The system would have a solids retention time (SRT) of 10 days and a mixed liquor suspended solids (MLSS) of 10,000 mg/L, allowing it to treat the combined stream, reducing the total organic carbon (TOC) by 86%, and the chemical oxygen demand (COD) by 91%.
Document Type: Research Article
Publication date: January 1, 2000
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