Accession Number:

ADA275035

Title:

Liquid-Phase Bioreactor for Degradation of Trichloroethylene and Benzene

Descriptive Note:

Final rept. 1 Jun-30 Nov 1991

Corporate Author:

ENVIROGEN INC LAWRENCEVILLE NJ

Personal Author(s):

Report Date:

1993-04-01

Pagination or Media Count:

45.0

Abstract:

The objective of this project was to design and operate a bench-scale biological treatment system capable of degrading trichlorethylene TCE and benzene, each present at concentrations up to 50 ppm, to concentrations of 4 ppb or less per contaminant. A two-stage reactor system was designed and fabricated to allow for the sequential degradation of benzene followed by TCE since TCE demonstrated no inhibitory effects on benzene degradation. A first-stage fixed- film reactor system demonstrated greater than 96 biodegradation of benzene from an artificially contaminated groundwater stream over a two month period of continuous operation. The liquid exiting the first-stage reactor was stripped to transfer the TCE and residual benzene into the air phase which was treated into a vapor phase bioreactor. The second-stage unit biodegraded greater than 90 of the TCE and greater than 90 of the residual benzene load. The two stage treatment system demonstrated the feasibility of biological treatment for a mixture of nonchlorinated and chlorinated organic contaminants in groundwater. Biodegradation, Bioreactor, Groundwater, Remediation, Trichloroethylene, Benzene.

Subject Categories:

  • Biochemistry
  • Organic Chemistry
  • Biomedical Instrumentation and Bioengineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE