Accession Number : ADA313931

Title :   Liquid-Phase Bioreactor for Degradation of Trichloroethylene and Benzene.

Descriptive Note : Final rept. 11 Jan 93-30 Dec 94,

Corporate Author : ENVIROGEN INC LAWRENCEVILLE NJ

Personal Author(s) : Guarini, Bill ; Folsom, Brian

PDF Url : ADA313931

Report Date : APR 1996

Pagination or Media Count : 70

Abstract : The major objective was to demonstrate the efficacy of a dual-stage bioreactor system for the treatment of groundwater contaminated with fuels and solvents. Under this SBIR Phase II, the number of chemicals to be treated during the field demonstration was expanded to include TCE, BTEX, and dichlorobenzenes (DCBs). A pilot-scale dual-stage bioreactor system was operated at Robins AFB GA to establish proof-of-concept and to develop operational and economic information for full-scale implementation. The system included a fluidized-bed reactor (FBR), an air stripper, and a TCE gas-phase bioreactor (GPR). Due to the enhanced performance of the FBR towards TCE, the demonstration essentially became a test of two independent pilot systems, one for treatment of contaminated water in the FBR and the second for treatment of contaminated air in the GPR. Operation of the system demonstrated effective treatment of not only BTEX and DCB, but also TCE. Over 210,000 gallons of contaminated groundwater were effectively treated during the demonstration. All hazardous chemicals were treated to concentrations near or below drinking water standards. An economic evaluation of the FBR to UV-peroxidation, air stripping with carbon adsorption, wet carbon adsorption and air stripping followed by PURUS adsorption suggests a significant cost savings over the life of a typical project.

Descriptors :   *BENZENE, *DEGRADATION, *LIQUID PHASES, *CONTAMINATION, *TRICHLOROETHYLENE, ECONOMIC ANALYSIS, ECONOMICS, DEMONSTRATIONS, AIR, CHEMICALS, ADSORPTION, BIOCHEMISTRY, PILOTS, CARBON, COSTS, CHEMICAL REACTORS, FUELS, WATER TREATMENT, GROUND WATER, OPERATION, SOLVENTS, BIOLOGICAL DETECTION, SAVINGS, HAZARDOUS MATERIALS, FLUIDIZED BED PROCESSORS.

Subject Categories : Biochemistry
      Organic Chemistry
      Biomedical Instrumentation and Bioengineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE