Meng Ling-Wei, Li Xiang-Kun, Wang Shu-Tao, Liu Li-Li, Ma Kai-Li, Zhang Jie
School of Municipal and Environmental Engineering, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
School of Municipal and Environmental Engineering, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
Chemosphere. 2017 Oct;184:215-223. doi: 10.1016/j.chemosphere.2017.05.171. Epub 2017 May 31.
In order to investigate long-term effect of cefalexin (CFX) on the performance of expanded granular sludge bed (EGSB) system and microbial community structure, two 1.47 L EGSB reactors E1 and E2 were designed and run for 224 days treating with synthetic antibiotic wastewater. For the purpose of comparison, E1 was fed with synthetic antibiotic industry wastewater with CFX added as the test reactor, while, E2 was fed without any CFX added as the control reactor (E2). The addition of CFX resulted in the continual increasing of soluble COD (sCOD) and accumulation of VFAs in the effluent of E1 system. Besides, it was found that the accumulation of CFX by-products D-1, D-2 and D-3 was negative correlation with sCOD removal efficiency. Furthermore, the microbial community structures were also investigated. For the bacterial community, Gelria and Syntrophorhabdus which can ferment propionate and other organic pollutants as their substrate were obviously enriched in E1 system. For the archaea, there was more functional diversity in E1 system than in E2 system. Furthermore, fungi also played an important role on the removal of complex organics in E1 system.
为了研究头孢氨苄（CFX）对膨胀颗粒污泥床（EGSB）系统性能和微生物群落结构的长期影响，设计了两个1.47升的EGSB反应器E1和E2，并运行224天以处理合成抗生素废水。为了进行比较，E1作为测试反应器，进料含有添加CFX的合成抗生素工业废水，而E2作为对照反应器（E2），进料不添加任何CFX。CFX的添加导致E1系统出水中可溶性化学需氧量（sCOD）持续增加和挥发性脂肪酸（VFA）积累。此外，发现CFX副产物D-1、D-2和D-3的积累与sCOD去除效率呈负相关。此外，还研究了微生物群落结构。对于细菌群落，能够以丙酸盐和其他有机污染物为底物进行发酵的盖氏菌属（Gelria）和互营嗜氢菌属（Syntrophorhabdus）在E1系统中明显富集。对于古菌，E1系统中的功能多样性比E2系统更多。此外，真菌在E1系统中对复杂有机物的去除也起着重要作用。
