Comprehensive hydrothermal pretreatment of municipal sewage sludge: A systematic approach.

Autor: Hamze A; Department of Civil Engineering, Toronto Metropolitan University, Toronto, Ontario, M5B 2K3, Canada., Zakaria BS; Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94608, United States; Advanced Biofuels and Bioproducts Process Development Unit, Emeryville, CA, 94608, United States; Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta, T6G 2R3, Canada., Zaghloul MS; Department of Civil Engineering, Toronto Metropolitan University, Toronto, Ontario, M5B 2K3, Canada; Department of Civil and Environmental Engineering, United Arab Emirates University, Sheik Khalifa Bin Zayed St - 'Asharij, Abu Dhabi, United Arab Emirates., Dhar BR; Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta, T6G 2R3, Canada., Elbeshbishy E; Department of Civil Engineering, Toronto Metropolitan University, Toronto, Ontario, M5B 2K3, Canada. Electronic address: elsayed.elbeshbishy@ryerson.ca.
Jazyk: angličtina
Zdroj: Journal of environmental management [J Environ Manage] 2024 Jun; Vol. 361, pp. 121194. Date of Electronic Publication: 2024 May 30.
DOI: 10.1016/j.jenvman.2024.121194
Abstrakt: This study provides a comprehensive analysis of the potential impact of hydrothermal pretreatment (HTP) on municipal thickened waste-activated sludge (TWAS) and its integration with anaerobic digestion (AD). The research demonstrates that HTP conditions (170 °C, 3 bars for 30 min) can increase the solubilization of macromolecular organic compounds by 41%, which enhances biodegradability in semicontinuous bioreactors. This treatment also results in a 50% reduction in chemical oxygen demand (COD) and a 63% increase in the destruction of volatile solids (VS). The combination of HTP with AD significantly boosts methane yields by 51%, reaching 176 ml/g COD, and improves the digestate dewaterability, doubling the solid content in the dewatered cake. However, a higher polymer dose is required compared to conventional AD. Microbial community analysis correlates the observed performance and alterations; it indicates that HTP enhances resilience to stress conditions such as ammonia toxicity. This comprehensive study provides valuable insights into the transition from wastewater treatment plants (WWTPs) to resource recovery facilities (RRF) in line with circular economy principles.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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