RECOVERY OF LIQUID HAZARDOUS WASTES FROM CARBON ADSORPTION STEAM REGENERATION STREAMS

Award Information
Agency:
Environmental Protection Agency
Branch
n/a
Amount:
$150,000.00
Award Year:
1991
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Agency Tracking Number:
14183
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
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Dr J G Wijmans
() -
Business Contact:
() -
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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