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EVALUATION OF FILTRATION AND DISTILLATION METHODS FOR RECYCLING AUTOMOTIVE COOLANT
Citation:
Randall, P. AND A. Gavaskar. EVALUATION OF FILTRATION AND DISTILLATION METHODS FOR RECYCLING AUTOMOTIVE COOLANT. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-93/435.
Description:
This evaluation addresses the product quality, waste reduction, and economic issues involved in recycling automotive engine coolants at a New Jersey Department of Transportation garage. he specific recycling units evaluated are based on the technologies of filtration and distillation. esults show that the filtration unit evaluated needs improvement to ensure an acceptable quality of the recycled coolant. istillation results show that this technology provides acceptable product quality and good waste reduction and economic potential. he New Jersey garage could potentially reduce waste from over 8000 gals/yr to approximately 400 gals/yr. he recycled product in the distillation evaluation passed selected ASTM performance tests. oiling point, freezing point, pH, corrosion resistance, and foam control functions of the coolant were restored to specifications. hemical characterization of the recycled coolant showed that metals, salts, and organic contaminants were either removed or reduced to levels where they posed no significant problems.