Reductive dechlorination of 2-chlorophenol in a hydrogenotrophic, gas-permeable, silicone membrane bioreactor.

Content Provider	Semantic Scholar
Author	Chang, Chao-Chien Tseng, S. Chang, Chih-Cheng Ho, Chun-Ming
Copyright Year	2003
Abstract	A gas-permeable silicone membrane bioreactor was used to cultivate the biofilm under hydrogenotrophic condition for reductive dechlorination of 2-chlorophenol (2-CP). The anaerobic sludge obtained from a swine wastewater treatment plant was immobilized by polyvinyl alcohol (PVA) so as to form a biofilm on the surface of the silicone tube. After acclimating for about 4 months, the bioreactor showed a high dechlorinating performance. Under the condition of continuous feeding with 2-CP at 25 mg/l and the hydraulic retention time of 15 h, the 2-CP removal efficiency reached 92.8% (2-CP decay rate: 0.67 g/m(2)d of surface area of silicone tube). H(2) was used as electron donor for dechlorinating 2-CP, and produced the dechlorinating intermediate, phenol. Both nitrate and sulfate played important roles in inhibiting 2-CP dechlorination through different biological mechanisms. Nitrate can be easily utilized as an electron acceptor by the biofilm, while sulfate cannot. Results of this study demonstrated that nitrate competed with 2-CP as the electron acceptor, while sulfate retarded the activity of hydrogen-dechlorinating bacteria and thus inhibited the 2-CP dechlorination.
File Format	PDF HTM / HTML
DOI	10.1016/S0960-8524(03)00149-4
Alternate Webpage(s)	http://www.prairieswine.com/pdf/3210.pdf
PubMed reference number	14575956
Alternate Webpage(s)	https://doi.org/10.1016/S0960-8524%2803%2900149-4
Journal	Medline
Volume Number	90
Issue Number	3
Journal	Bioresource technology
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article