三氯生对污泥高温厌氧消化的影响及机制  

Impact and Mechanism of Triclosan on High-temperature Anaerobic Digestion of Sludge

作　　者：孙书荃 高川 张斌 薛淑帆 付培培 马浩元 SUN Shu-quan;GAO Chuan;ZHANG Bin;XUE Shu-fan;FU Pei-pei;MA Hao-yuan(School of Environmental Engineering,Yellow River Conservancy Technical Institute,Kaifeng 475004,China;Kaifeng Municipal Water Environmental Pollution Monitoring Engineering Technology Research Center,Kaifeng 475004,China;School of Environmental Science and Engineering,Sun Yat-sen University,Guangzhou 510275,China)

机构地区：[1]黄河水利职业技术学院环境工程学院,河南开封475004 [2]开封市水环境污染监测工程技术研究中心,河南开封475004 [3]中山大学环境科学与工程学院,广东广州510275

出　　处：《中国给水排水》2025年第7期110-116,共7页China Water & Wastewater

基　　金：河南省科技发展计划项目(222102320424);河南省教育厅重点项目(22B610005)。

摘　　要：三氯生(TCS)是污泥内常被检出的新污染物,但关于TCS对污泥生物处理的影响鲜有报道。为此,在高温条件下考察了TCS对污泥厌氧消化的影响,并探究相关作用机制。结果表明,TCS会显著抑制甲烷产量及甲烷在沼气中的体积占比。同时,TCS会促进污泥的水解过程,导致发酵液内溶解性COD(SCOD)、溶解性蛋白质和溶解性多糖浓度升高;但TCS会抑制水解产物的酸化过程,导致短链脂肪酸(SCFA)产量下降,并降低乙酸盐在SCFA中的占比。微生物代谢活性分析结果显示,TCS的存在提高了活性氧(ROS)和乳酸脱氢酶(LDH)释放量,且TCS含量越高,ROS和LDH的释放就越显著。酶活性分析结果显示,TCS的存在降低了与酸化和甲烷化相关的酶活性,当TCS含量为1.2 g/kg时,辅酶F420的相对活性降至31.2%。Triclosan(TCS)is an emerging pollutant frequently detected in sludge.However,limited research has been conducted on its impact on the biological treatment of sludge.Consequently,this study investigated the effects of TCS on high-temperature anaerobic digestion of sludge and explored the underlying mechanisms.TCS substantially inhibited methane production and the volumetric proportion of methane in biogas.Simultaneously,TCS enhanced the hydrolysis process of sludge,leading to elevated concentrations of soluble chemical oxygen demand(SCOD),soluble proteins,and soluble polysaccharides in the fermentation liquid.However,TCS also inhibited the acidification of hydrolysates,leading to a reduction in short-chain fatty acids(SCFAs)production,particularly in the proportion of acetate in SCFAs.The analysis of microbial metabolic activity revealed that the presence of TCS led to increased release of reactive oxygen species(ROS)and lactate dehydrogenase(LDH).Moreover,a positive correlation was observed between the concent of TCS and the release of ROS and LDH.The presence of TCS diminished the enzymatic activities related to acidogenesis and methanogenesis.Specifically,the relative activity of coenzyme F420 decreased to 31.2%when the TCS concent reached 1.2 g/kg.

关 键 词：三氯生 污泥 高温厌氧消化 甲烷 水解 酸化 

分 类 号：TU992[建筑科学—市政工程]