Simultaneous Removal of Phenol and Nitrate in an Anaerobic Bioreactor

作者：Jianhang Zhu, Jinping Lin, Zhang Bao, Xiluan Yan, Zanguo Peng · 发表于：Journal of Environmental Engineering · 年份：2006 · DOI：10.1061/(asce)0733-9372(2006)132:9(1073) · 被引用次数：11 · 研究领域：Wastewater Treatment and Nitrogen Removal、Water Treatment and Disinfection、Microbial Fuel Cells and Bioremediation

Phenol and nitrate are two major pollutants simultaneously occurring in several industrial wastewaters. In this study, a 110-day gradual enrichment of an anaerobic culture has been carried out at 25°C in an anaerobic bioreactor for continuously treating a synthetic wastewater containing 600mg∕L phenol and 430mg∕LNO3−–N. The results showed that the enriched culture can utilize phenol as a sole electron donor and nitrate as a sole electron acceptor. At the end of the enrichment (on Day 110), 93.3% of phenol and 98.0% of NO3−–N were simultaneously removed at a hydraulic retention time of 20.25h in the anaerobic bioreactor. The removal of 1gNO3−–N required about 3.19g chemical oxygen demand as the electron donor. Batch tests further revealed that cresol, nitrophenol, and monochlorinated phenol (MCP) could exert detrimental influences on the treatment abilities of the enriched culture. However, the inhibitory effects of cresol were impermanent, as compared to those of nitrophenol and MCP. In order to operate the anaerobic bioreactor steadily, high concentrations of cresol should be diluted before being fed while the existence of nitrophenol and MCP in the bioreactor should be avoided.