Grantee Research Project Results
Recovery of Liquid Hazardous Wastes from Carbon Adsorption Steam Regeneration Streams
EPA Contract Number: 68D00029Title: Recovery of Liquid Hazardous Wastes from Carbon Adsorption Steam Regeneration Streams
Investigators: Wijmans, J. (Hans) G.
Small Business: Membrane Technology and Research Inc.
EPA Contact: Richards, April
Phase: I
Project Period: August 1, 1990 through February 1, 1991
Project Amount: $50,000
RFA: Small Business Innovation Research (SBIR) - Phase I (1991) RFA Text | Recipients Lists
Research Category: Hazardous Waste/Remediation , SBIR - Waste , Small Business Innovation Research (SBIR)
Description:
Carbon adsorption is a widely used technique to remove and concentrate VOCs from diluted air and water streams. Periodically carbon beds are regenerated with steam. The results of this regeneration after cooling, is a concentrated mixture of hazardous compounds and water. Common and particularly troublesome stream condensates are those con- taining mixtures of chlorinated solvents and water-miscible (hydrophilic) solvents. The presence of the chlorinated solvents makes solvent reclamation very difficult and the entire stream must be treated as a hazardous waste and sent to incinerators fitted with appropriate scrubbers for disposal. Membrane Technology and Research, Inc., proposes to develop a pervaporation process to selectively remove the chlorinated solvent from the stream. Reclamation of solvents from these two separate streams is then straightforward. The process will be demonstrated with acetone-methylene chloride-water mixtures in Phase 1. A small bench-scale integrated system will be built and operated in Phase 11 on solvent mixtures of increasing complexity.Supplemental Keywords:
RFA, Scientific Discipline, Waste, Hazardous, Chemical Engineering, Engineering, Civil/Environmental Engineering, Environmental Chemistry, Chemistry and Materials Science, Hazardous Waste, Environmental Engineering, carbon adsorption stream, liquid hazardous waste, hydrophillic solvents, chlorinated waste liquid, regeneration stream, solvent reclamation, water miscible solvents, chlorinated solvents, carbon adsorptionProgress and Final Reports:
The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Conclusions drawn by the principal investigators have not been reviewed by the Agency.