RECOVERY OF LIQUID HAZARDOUS WASTES FROM CARBON ADSORPTION STEAM REGENERATION STREAMS

Award Information
Agency: Environmental Protection Agency
Branch: N/A
Contract: N/A
Agency Tracking Number: 14183
Amount: $150,000.00
Phase: Phase II
Program: SBIR
Awards Year: 1991
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Membrane Technology & Research
1360 Willow Road Suite 103, Menlo Park, CA, 94025
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Dr J G Wijmans
 () -
Business Contact
Phone: () -
Research Institution
N/A
Abstract
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 CONTAINING 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 ANDRESEARCH, 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 I. A SMALL BENCH-SCALE INTEGRATED SYSTEM WILL BE BUILT AND OPERATED IN PHASE II ON SOLVENT MIXTURES OF INCREASING COMPLEXITY. 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 CONTAINING 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 ANDRESEARCH, 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 I. A SMALL BENCH-SCALE INTEGRATED SYSTEM WILL BE BUILT AND OPERATED IN PHASE II ON SOLVENT MIXTURES OF INCREASING COMPLEXITY.

* information listed above is at the time of submission.

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