Recovery of Liquid Hazardous Wastes from Carbon Adsorption Steam Regeneration Streams

EPA Contract Number: 68D00029
Title: 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: Manager, SBIR Program
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)


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, Chemical Engineering, Environmental Chemistry, Civil/Environmental Engineering, Hazardous Waste, Chemistry and Materials Science, Engineering, Hazardous, Environmental Engineering, regeneration stream, hydrophillic solvents, solvent reclamation, carbon adsorption, pervaporation system, carbon adsorption stream, chlorinated waste liquid, water miscible solvents, chlorinated solvents

Progress and Final Reports:

  • Final