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EVALUATION OF FILTRATION AND DISTILLATION METHODS FOR RECYCLING AUTOMOTIVE COOLANT.
Citation:
Randall*, P M. AND A. Gavaskar. EVALUATION OF FILTRATION AND DISTILLATION METHODS FOR RECYCLING AUTOMOTIVE COOLANT. JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION. AWMA, Pittsburgh, PA, 43(4):463-468, (1993).
Impact/Purpose:
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Description:
This evaluation addresses the product quality, waste reduction, and economic issues involved in recycling automotive and heavy-duty engine coolants at a New Jersey Department of Transportation garage. The specific recycling units evaluated are based on the technologies of filtration and distillation, Results show that the filtration unit evaluated needs improvement to ensure an acceptable quality of the recycled coolant. Distillation results show that this technology provides acceptable product quality and good waste reduction and economic potential. The New Jersey garage could potentially reduce waste from over 8000 gals/yr to approximately 400 gal/yr. The recycled product in the distillation evaluation passed selected ASTM performance tests. Boiling point, freezing point, pH, corrosion resistance, and foam control functions of the coolant were restored to specifications. Chemical charac- terization of the recycled coolant showed that metals, salts and organic contami- nants were either removed or reduced to levels where they posed no significant problems.
