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Cometabolic Degradation of TCE and DCE without Intermediate Toxicity.
- Source :
- Journal of Environmental Engineering; Nov95, Vol. 121 Issue 11, p791, 7p
- Publication Year :
- 1995
-
Abstract
- 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. [ABSTRACT FROM AUTHOR]
- Subjects :
- TRICHLOROETHYLENE
WATER pollution
Subjects
Details
- Language :
- English
- ISSN :
- 07339372
- Volume :
- 121
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- Journal of Environmental Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 6783797
- Full Text :
- https://doi.org/10.1061/(ASCE)0733-9372(1995)121:11(791)