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EVALUATION OF PROCESS SYSTEMS FOR EFFECTIVE MANAGEMENT OF ALUMINUM FINISHING WASTEWATERS AND SLUDGES
Citation:
Saunders, F., E. Chian, C. Harmon, K. Kratz, AND J. Medero. EVALUATION OF PROCESS SYSTEMS FOR EFFECTIVE MANAGEMENT OF ALUMINUM FINISHING WASTEWATERS AND SLUDGES. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/2-84/077 (NTIS PB84170661), 1984.
Description:
Innovative processes for use in treatment of wastewaters and sludges produced in anodizing, etching and painting extruded aluminum were investigated. Results of the research can be immediately implemented at many aluminum-finishing plants where sludge disposal restrictions and costs are increasing. Segregated neutralization and recovery of spent caustic etch can be used to increase the net solids content of dewatered-sludge available for disposal. Reclamation of dewatered-sludge solids using acid extraction for production of liquid alum has potential for virtual elimination of the need for sludge disposal while producing a net income from this sludge-reclamation process.