Transformation of tetrachloroethene in an upflow anaerobic sludgeblanket reactor |
| |
Authors: | N Christiansen S R Christensen E Arvin B K Ahring |
| |
Institution: | (1) Institute of Environmental Science and Engineering, Building 115, Technical University of Denmark, 2800 Lyngby, Denmark. Fax: +45 45 93 28 50 e-mail: BKA@IMT.DTU.DK, DK |
| |
Abstract: | Reductive dechlorination of tetrachloroethene was studied in a mesophilic upflow anaerobic sludge blanket reactor. Operating
the reactor in batch mode the dynamic transformation of tetrachloroethene, trichloroethene and dichloroethene (DCE) was monitored.
Tetrachloroethene was reductively dechlorinated to trichloroethene, which again was dechlorinated at the same rate as DCE
was produced. DCE showed a lag period of 40 h before transformation was observed. During normal reactor operation trans-1,2-DCE was the major DCE isomer, followed by cis-1,2-DCE. Small amounts of 1,1-DCE but no vinyl chloride were detected. When the influent tetrachloroethene concentration
was increased from 4.6 μM to 27 μM, the transformation rate increased, indicating that the system was not saturated with tetrachloroethene.
The main organic component in the effluent was acetate, indicating that the aceticlastic methane-producing bacteria were inhibited
by the chlorinated ethenes.
Received: 29 July 1996 / Received revision: 13 September 1996 / Accepted: 13 September 1996 |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|