Cometabolic degradation of TCE and DCE without intermediate toxicity

Journal Article · Wed Nov 01 04:00:00 EST 1995 · Journal of Environmental Engineering

DOI:https://doi.org/10.1061/(ASCE)0733-9372(1995)121:11(791)· OSTI ID:162995

Bielefeldt, A R; Stensel, H D; Strand, S E ^[1]

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1. Univ. of Washington, Seattle, WA (United States)

Trichloroethylene (TCE) and cis-1,2-dichloroethylene (DCE) cometabolic degradation by a filamentous, phenol-oxidizing enrichment from a surface-water source were investigated in batch tests. No intermediate toxicity effects were evident during TCE or DCE degradation for loadings up to 0.5 mg TCE/mg VSS or 0.26 mg DCE/mg VSS. Phenol addition up to 40 mg/L did not inhibit TCE or DCE degradation. TCE specific degradation rates ranged from 0.28 to 0.51 g TCE/g VSS-d with phenol present, versus an average endogenous rate of 0.18 g TCE/g VSS-d. DCE specific degradation rates ranged from 0.79 to 2.92 g DCE/g VSS-d with phenol present, versus 0.27 to 1.5 g DCE/g VSS-d for endogenous conditions. There was no inhibition of DCE degradation rates at concentrations as high as 83 mg/L. TCE degradation rates declined between 40 and 130 mg/L TCE. Perchloroethylene, 1,1,1-trichloroethane, and chloroform were not degraded.

• Sponsoring Organization: USDOE
• OSTI ID: 162995
• Journal Information: Journal of Environmental Engineering, Journal Name: Journal of Environmental Engineering Journal Issue: 11 Vol. 121; ISSN 0733-9372; ISSN JOEEDU
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
56 BIOLOGY AND MEDICINE
APPLIED STUDIES
BIODEGRADATION
CHLORINATED ALIPHATIC HYDROCARBONS
GROUND WATER
METABOLISM
REMEDIAL ACTION
TOXICITY
WATER POLLUTION