Institute of Ecology and Environmental Governance, College of Life Sciences, Hebei University, Baoding 071002, Hebei Province, PR China.
Institute of Ecology and Environmental Governance, College of Life Sciences, Hebei University, Baoding 071002, Hebei Province, PR China.
Bioresour Technol. 2020 Sep;312:123505. doi: 10.1016/j.biortech.2020.123505. Epub 2020 May 8.
Triclosan (TCS), as an antimicrobial agent, is considered as a representative emerging contaminant and was frequently detected in excess sludge. This study investigated the effect of TCS on activate wastewater sludge (WAS) digestion through laboratory methane production experiment. It was concluded that TCS had a tendency to restrain methane production from sludge with its exposure level increasing. The results displayed that the yields of final maximum cumulative methane production were similar about 108.4 mL/g VSS at TCS level lower 200 mg TCS/kg TSS, while the values were approximately 95.2 mL/g VSS with TCS level over 550 mg TCS/kg TSS. Although TCS could be degraded, its intermediates in this study had no effect on sludge digestion. In addition, TCS at higher levels had seriously negative effect on the solubilization, hydrolysis, acidification, and methanogenesis processes. Microbial community was further analyzed to understand the TCS's effect on digestion system from a micro perspective.
三氯生（TCS）作为一种抗菌剂，被认为是一种具有代表性的新兴污染物，经常在剩余污泥中被检测到。本研究通过实验室甲烷生产实验，考察了 TCS 对活性废水污泥（WAS）消化的影响。结果表明，随着 TCS 暴露水平的增加，TCS 有抑制污泥产甲烷的趋势。结果表明，在 TCS 水平低于 200mg TCS/kg TSS 时，最终最大累积甲烷产量的产率相似，约为 108.4mL/g VSS，而当 TCS 水平高于 550mg TCS/kg TSS 时，产率约为 95.2mL/g VSS。尽管 TCS 可以被降解，但本研究中的中间产物对污泥消化没有影响。此外，较高水平的 TCS 对污泥的溶解、水解、酸化和产甲烷过程有严重的负面影响。进一步分析微生物群落，从微观角度了解 TCS 对消化系统的影响。
