SUNShu-quan,GAOChuan,ZHANGBin,et al.Impact and Mechanism of Triclosan on High-temperature Anaerobic Digestion of Sludge[J].China Water & Wastewater,2025,41(7):110-116.
Impact and Mechanism of Triclosan on High-temperature Anaerobic Digestion of Sludge
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第41卷
Number:
第7期
Page:
110-116
Column:
Date of publication:
2025-04-01
- Keywords:
- triclosan; sludge; high-temperature anaerobic digestion; methane; hydrolysis; acidification
- Abstract:
- 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.
Last Update:
2025-04-01