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论文类型： 期刊论文

发表时间： 2012-10-15

发表刊物： JOURNAL OF HAZARDOUS MATERIALS

收录刊物： SCIE、EI、PubMed、Scopus

卷号： 235

页面范围： 78-84

ISSN号： 0304-3894

关键字： Refractory organics; Phenols; COD; Coal gasification wastewater; MBR; Nitrification inhibition

摘要： As a typical industrial wastewater, coal gasification wastewater has poor biodegradability and high toxicity. In this paper, a laboratory-scale anaerobic-anoxic-oxic membrane reactor (A(2)O-MBR) system was developed to investigate the treatment ability of coal gasification wastewater. The removal capacity of each pollutants used in this system were determined at different hydraulic residence times (HRT) and mixed liquor recycle ratios (R). The experimental results showed that this system could effectively deal with COD and phenol removal and remain in a stable level when the operational parameters altered, while the nitrification was sensitive to operational conditions. The best performance was obtained at HRT of 48 h and R of 3. The maximum removal efficiencies of COD, NH4+-N and phenols were 97.4%, 92.8% and 99.7%, with final concentrations in the effluent of 71 mg/L, 9.6 mg/L and 3 mg/L, respectively. Organics degradation and transformation were analyzed by GC/MS and it was found that anaerobic process played an important role in degradation of refractory compounds. (c) 2012 Published by Elsevier B.V.