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Effect of carbon sources on the removal of 1,1,2-Trichloroethane and 1,1,2,2-Tetrachloroethane in UASB reactor

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Title Effect of carbon sources on the removal of 1,1,2-Trichloroethane and 1,1,2,2-Tetrachloroethane in UASB reactor
 
Creator BASU, D
ASOLEKAR, SR
 
Subject 1,1,2-Trichloroethane
1,1,2,2-Tetrachloroethane
upflow anaerobic sludge blanket
acclimation
dechlorination
REDUCTIVE DECHLORINATION
POLYCHLORINATED HYDROCARBONS
GRANULAR SLUDGE
TETRACHLOROETHYLENE
BIOTRANSFORMATION
 
Description The effect of two carbon sources namely sodium acetate and ethanol was studied in bench-scale Upflow Anaerobic Sludge Blanket (UASB) reactors for the removal of chlorinated ethanes i.e., 1,1,2-Trichloroethane (TCA) and 1,1,2,2-Tetrachloroethane (TeCA) contained in the simulated wastewaters. The Hydraulic Retention Time (HRT) was maintained as 24 hours in all the reactors. The granular biomass in the test reactors R2 and R3 were acclimated to 40 mg/L of TCA and 20 mg/L of TeCA, respectively. The effluent TCA and TeCA concentrations were 0.03 mg/L and 0.18 mg/L, respectively, at the end of acclimation phase. Sodium acetate and ethanol both were found to be suitable as the primary substrates in the biodegradation of TCA and TeCA. However, lower concentrations of the toxic pollutants (TCA and TeCA) were obtained in the effluents with the use of sodium acetate. The COD removal efficiency in the test reactors (R2 and R3) varied in the range of 95% to 98.2% accompanied by the formation of 1,2-Dichloroethane (DCA) as the major intermediate.
 
Publisher TAYLOR & FRANCIS INC
 
Date 2014-10-17T05:03:52Z
2014-10-17T05:03:52Z
2012
 
Type Article
 
Identifier JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING, 47(4)638-644
http://dx.doi.org/10.1080/10934529.2012.650586
http://dspace.library.iitb.ac.in/jspui/handle/100/16019
 
Language en