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COMBINED AND SEPARATE MUNICIPAL AND LEACHATE WASTEWATER TREATMENT: FULL SCALE APPLICATION OF THE MEMBRANE BIOREACTOR SYSTEM

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The Mount Holly Municipal Utilities Authority operates a publicly owned treatment works in Burlington County, NJ serving Mount Holly and surrounding communities, referred to as the Rancocas Road Water Pollution Control Facility (Rancocas Road treatment plant). In 1999, the MHMUA contracted Envirogen, Inc., Lawrenceville, NJ to supply a commercial scale, transportable internal membrane biological reactor (TIMBR™) system, and to conduct a TIMBR system experimental evaluation and demonstration study in order to assess the attractiveness of the MBR process configuration for treatment of the Rancocas Road plant wastewater. A number of TIMBR system operating phases were completed during the study in order to develop values for the parameters governing design of an MBR system, generate full scale system cost information, and demonstrate system performance in the treatment of:



municipal wastewater plus trucked in leachate and septage, and various treatment plant return streams,


trucked in leachate only, and


municipal wastewater (i.e., sanitary, plus minor industrial discharges).


The TIMBR system was operated under a number of different hydraulic retention time (HRT) and solids retention time (SRT) conditions in the treatment of the various wastewaters, over the period from January 2000 through early January 2001. A sufficient amount of TIMBR system operating and performance data was developed to conclude the MBR process configuration is capable of achieving essentially complete CBOD5, TSS and total P removal and a high degree of total N removal, in the treatment of the municipal wastewater received at the Rancocas Road site. The presence of leachate in the wastewater does impact the SRT required to achieve nitrification. The use of membranes for biomass-effluent separation is critical to achieving a high effluent quality. The membrane efficiency (i.e., flow rate per unit area) appeared to be affected by a number of factors, including the presence of leachate in the wastewater.
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Document Type: Research Article

Publication date: 2001-01-01

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