Journal of Environmental Science and Health, Part A: Toxic/Hazardous Substances & Environmental Engineering 2012-01-01

Effect of carbon sources on the removal of 1,1,2-trichloroethane and 1,1,2,2-tetrachloroethane in UASB reactor.

Debolina Basu, Shyam R Asolekar

Index: J. Environ. Sci. Health. A. Tox. Hazard. Subst. Environ. Eng. 47(4) , 638-44, (2012)

Full Text: HTML

Abstract

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.

Related Compounds

  • 1,1,2-Trichloroeth...
  • 1,1,2,2-Tetrachlor...

Related Articles:

Development of QSAR models for predicting hepatocarcinogenic toxicity of chemicals.

2009-09-01

[Eur. J. Med. Chem. 44 , 3658-64, (2009)]

Development of a new extraction method based on counter current salting-out homogenous liquid-liquid extraction followed by dispersive liquid-liquid microextraction: Application for the extraction and preconcentration of widely used pesticides from fruit juices.

2016-01-01

[Talanta 146 , 772-9, (2015)]

Development of counter current salting-out homogenous liquid-liquid extraction for isolation and preconcentration of some pesticides from aqueous samples.

2015-07-23

[Anal. Chim. Acta 885 , 122-31, (2015)]

A sensitive and efficient method for trace analysis of some phenolic compounds using simultaneous derivatization and air-assisted liquid-liquid microextraction from human urine and plasma samples followed by gas chromatography-nitrogen phosphorous detection.

2015-12-01

[Biomed. Chromatogr. 29 , 1921-31, (2015)]

Photovoltaic effect in individual asymmetrically contacted lead sulfide nanosheets.

2015-03-21

[Nanoscale 7(11) , 4875-83, (2015)]

More Articles...