Influence of Electron Acceptors and Carbon Sources on the Biotransformation of Chlorophenols in an Anaerobic System

Kong, In-Chul; Jeong, Hun-Bong

Environmental Engineering Research 1998;3(3): 151-156.

In-Chul Kong^†, and Hun-Bong Jeong

Department of Environmental Engineering, Yeungnam University Daedong, Kyungsan city, Kyungbuk 712-749, Korea

Corresponding Author: In-Chul Kong ,

Received: April 6, 1998; Accepted: July 6, 1998.

ABSTRACT

Influences of carbon sources and electron acceptors on the anaerobic dechlorination of accumulated chlorophenols (CPs) in batch and continuous flow-type bioreactor were studied. Microbial consortia amended with Na-acetate, -lactate, and yeast extract stimulate dechlorination compared to unamended consortia and amended with Na-propionate and -formate. However, no significant effect was observed on dechlorination of 3-CP. Addition of electron acceptors (Na-nitrate and -thiosulfate) to microbial consortia from bioreactor reduced initial 18.6 mg/L 2,3-CP to 8.7 and 7.3 mg/L, respectively, for 48 days incubation, however, approximately 11.8 mg/L was observed in the presence of Na-sulfate, -sulfite and control. Amended Na-lactate in a continuous system enhanced the dechlorination of 2,3-CP compared to addition of Na-formate.

Keywords: Anaerobic Dechlorination | Carbon Sources | Electron Acceptors