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Title:Coolant Recycling and Waste Water Reduction Alternatives for the Aluminum Disc Polishing Industry
Subject(s):Aluminum industry and trade -- Source reduction (Waste management) -- Case studies
Aluminum -- Finishing -- Source reduction (Waste management) -- Case studies
Abstract:A manufacturer of aluminum discs used for the production of CD-ROMs and other computer peripherals was discharging a high biological oxygen demand (BOD) effluent at a rate of 35,000 gallons/day. This waste was consuming approximately 20% of the local POTWs waste water treatment capacity. Faced with stiff penalties for grossly exceeding the BOD regulatory limits and facing possible shutdown, the company tried unsuccessfully to chemically treat the effluents. Biological treatment was too expensive and uncertain because of the presence of biocides in the effluent. The company turned to Illinois Sustainable Technology Center (ISTC) technical staff for possible answers. The objectives were to reduce the current BOD (~4100 mg/L) to values closer to the regulatory limits and reduce the volume of wastewater discharged (~35,500 gallons per day, gpd) to sewer. ISTC personnel quickly identified the coolants and alkaline cleaners used in the grinding process as the main source of the BOD problem. Working in conjunction with the plant personnel, ISTC identified a lower BOD coolant that was also cheaper. Plant-wide substitution resulted in a BOD decrease of 70%.
Issue Date:1997, 2013
Publisher:Illinois Sustainable Technology Center (formerly Illinois Waste Management and Research Center)
Series/Report:TN Series (Illinois Sustainable Technology Center) ; 13-063
Genre:Technical Report
Date Available in IDEALS:2007-09-07

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