维普中文期刊产品整合服务

Degradation and mineralization of 2-chlorophenol in a single-stage anaerobic fixed-bed bioreactor

查看全文 作　　者：GENG [1]YiKun;LI [1]ZhengHao;YUAN [1]Li;PAN [1]XinRong;SHENG [1]GuoPing 高影响力作者 机构地区：[1]CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China高影响力机构 出　　处：《Science China(Technological Sciences)》索引2020年第63卷第1期,共10页高影响力期刊 基　　金：supported by the National Key Research and Development Program of China(Grant No.2016YFC0401101);the National Natural Science Foundation of China(Grant Nos.51738012,51708533,and51821006);the Key Research Program of Frontier Sciences,CAS(Grant No.QYZDB-SSWQDC020);the Fundamental Research Funds for the Central Universities(Grant No.WK2060190079) 摘　　要：Chlorophenols(CPs) have drawn great attention due to their high toxicity and ubiquitous presence in the environment. However,the practical application of anaerobic biodegradation to remove CPs is limited by low degradation rate and incomplete mineralization. This work aims to apply a single-stage anaerobic fixed-bed bioreactor(An FBR) for complete anaerobic dechlorination and mineralization of CPs. Results showed that 2-CP removal efficiency of 99.4%, chemical oxygen demand(COD)removal efficiency of 93.0%, and methane yield of 0.22 L-CH4/g-COD could be obtained for a wide range of 2-CP loading rates(3.6–18.2 mmol L–1 d–1). Nearly complete anaerobic mineralization of 2-CP was achieved even in the absence of co-substrates,thereby greatly reducing the operation cost. This may be partly related to the attached-growth microorganisms in An FBR,allowing a higher biomass concentration and longer biomass retention time for enhanced 2-CP removal. Moreover, 16 S r RNA gene sequence analysis suggests that the An FBR harbored the potential dechlorinators(e.g., Anaeromyxobacter), phenoldegrading microbes(e.g., Comamonas and Syntrophobacter), and methanogens(e.g., Methanobacterium and Methanosaeta)after acclimation, which could cooperate effectively for 2-CP dechlorination and mineralization. Based on the identified intermediates, the possible mineralization pathway of 2-CP was proposed. These findings should be valuable to facilitate the engineering applications of An FBRs for removing CPs from wastewater. 关 键 词：anaerobic fixed-bed bioreactor CHLOROPHENOLS degradation pathway intermediates MINERALIZATION
相关文献

参考文献(42)

引证文献(2)

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1　渝公网安备 50019002500403号　违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费