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Bioenergy recovery and carbon emissions benefits of short-term bio-thermophilic pretreatment on low organic sewage sludge anaerobic digestion: A pilot-scale study.
Wang, Hui; Fu, Xiang; Huang, Haozhe; Shen, Danni; Fan, Dongdong; Zhu, Liming; Dai, Xiaohu; Dong, Bin.
Afiliação
  • Wang H; College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
  • Fu X; College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
  • Huang H; College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
  • Shen D; Yangtze Eco-Environment Engineering Research Center, China Three Gorges Corporation, Beijing 100038, China; Yangtze River Eco-Environmental Engineering Research Center, Shanghai Investigation, Design and Research Institute Co., LTD, Shanghai 200092, China.
  • Fan D; China Construction Third Engineering Bureau First Engineering Co., Ltd., Wuhan 430000, China.
  • Zhu L; China Construction Third Engineering Bureau First Engineering Co., Ltd., Wuhan 430000, China.
  • Dai X; College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
  • Dong B; College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Yangtze Eco-Environment Engineering Research Center, China Three Gorges Corporation, Beijing 100038, China. Electronic address: dongbin@tongji.edu.cn.
J Environ Sci (China) ; 148: 321-335, 2025 Feb.
Article em En | MEDLINE | ID: mdl-39095168
ABSTRACT
Sewage sludge in cities of Yangzi River Belt, China, generally exhibits a lower organic content and higher silt contentdue to leakage of drainage system, which caused low bioenergy recovery and carbon emission benefits in conventional anaerobic digestion (CAD). Therefore, this paper is on a pilot scale, a bio-thermophilic pretreatment anaerobic digestion (BTPAD) for low organic sludge (volatile solids (VS) of 4%) was operated with a long-term continuous flow of 200 days. The VS degradation rate and CH4 yield of BTPAD increased by 19.93% and 53.33%, respectively, compared to those of CAD. The analysis of organic compositions in sludge revealed that BTPAD mainly improved the hydrolysis of proteins in sludge. Further analysis of microbial community proportions by high-throughput sequencing revealed that the short-term bio-thermophilic pretreatment was enriched in Clostridiales, Coprothermobacter and Gelria, was capable of hydrolyzing acidified proteins, and provided more volatile fatty acid (VFA) for the subsequent reaction. Biome combined with fluorescence quantitative polymerase chain reaction (PCR) analysis showed that the number of bacteria with high methanogenic capacity in BTPAD was much higher than that in CAD during the medium temperature digestion stage, indicating that short-term bio-thermophilic pretreatment could provide better methanogenic conditions for BTPAD. Furthermore, the greenhouse gas emission footprint analysis showed that short-term bio-thermophilic pretreatment could reduce the carbon emission of sludge anaerobic digestion system by 19.18%.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Esgotos / Eliminação de Resíduos Líquidos Idioma: En Ano de publicação: 2025 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Esgotos / Eliminação de Resíduos Líquidos Idioma: En Ano de publicação: 2025 Tipo de documento: Article