Environmental sustainability practice of sewage sludge and low-rank coal co-pyrolysis: A comparative life cycle assessment study.

Zhou, Jinyang; Li, Mingyue; Han, Xue; Wang, Beili; Zhang, Chen; Cheng, Zhiwen; Shen, Zhemin; Ogugua, Paul Chinonso; Zhou, Chao; Pan, Xiaolei; Yang, Fan; Yuan, Tao

Zhou, Jinyang; Li, Mingyue; Han, Xue; Wang, Beili; Zhang, Chen; Cheng, Zhiwen; Shen, Zhemin; Ogugua, Paul Chinonso; Zhou, Chao; Pan, Xiaolei; Yang, Fan; Yuan, Tao.

Affiliation

Zhou J; State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China. Electronic address: zhoujinyang@sjtu.edu.cn.
Li M; State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China. Electronic address: limingyue@sjtu.edu.cn.
Han X; State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China. Electronic address: y83220019@mail.ecust.edu.cn.
Wang B; State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China. Electronic address: wbl_1105@sjtu.edu.cn.
Zhang C; State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China. Electronic address: zhangchen319@sjtu.edu.cn.
Cheng Z; School of Chemical and Environmental Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai 201418, China. Electronic address: chengzhiwen@sit.edu.cn.
Shen Z; State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China. Electronic address: zmshen@sjtu.edu.cn.
Ogugua PC; School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China. Electronic address: paul@sjtu.edu.cn.
Zhou C; Wuhuan Engineering Co. Ltd., Wuhan 430223, China. Electronic address: zhouchaogd@cwcec.com.
Pan X; State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China. Electronic address: 123160910025@sjtu.edu.cn.
Yang F; State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China. Electronic address: yvonneyang.fan@sjtu.edu.cn.
Yuan T; State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China. Electronic address: taoyuan@sjtu.edu.cn.

Sci Total Environ ; 928: 172255, 2024 Jun 10.

Article in En | MEDLINE | ID: mdl-38599412

ABSTRACT

ABSTRACT

This study attempts to bridge the current research gaps related to the environmental burdens of low-rank coal (LRC) and sewage sludge (SS) co-pyrolysis potentially. The life cycle assessment (LCA), energy recovery and sensitivity analysis were investigated for different proportions of LRC and SS (co-)pyrolysis. The results showed that the LRC/SS pyrolysis mitigated the environmental burden with an average improvement of 43 % across 18 impact categories compared with SS pyrolysis. The best net values of energy and carbon credits were identified in SL-4 with -3.36 kWh/kg biochar and -1.10 CO2-eq/kg biochar, respectively. This study firstly proposed an optimal LRC/SS co-feed proportion at 3 to 7, which achieves the acceptable environmental burden and satisfactory energy recovery. Moreover, sensitivity analysis demonstrated this proportion is robust and adaptable. LRC/SS co-pyrolysis is a promising and sustainable alternative for SS disposal, which could meet the imperative of carbon emission mitigation and resource recycling.

Key words

Co-pyrolysis; Environmental burdens; Life cycle assessment; Low-rank coal; Sewage sludge

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