Comprehensive hydrothermal pretreatment of municipal sewage sludge: A systematic approach.
In: Journal of Environmental Management, Jg. 361 (2024-06-15), S. N.PAG
academicJournal
Zugriff:
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. • HTP before AD boosts solubilization of complex organics by 41%. • HTP followed by AD achieves a 50% reduction in COD and a 63% reduction in volatile solids. • HTP coupled with AD doubles dewaterability, requiring a 13.6% higher polymer dose. • Impacts of viscosity and particle size distribution on dewaterability performance were investigated. • HTP induces significant alterations in the microbial community. [ABSTRACT FROM AUTHOR]
Titel: |
Comprehensive hydrothermal pretreatment of municipal sewage sludge: A systematic approach.
|
---|---|
Autor/in / Beteiligte Person: | Hamze, Abir ; Zakaria, Basem S. ; Zaghloul, Mohamed Sherif ; Dhar, Bipro Ranjan ; Elbeshbishy, Elsayed |
Zeitschrift: | Journal of Environmental Management, Jg. 361 (2024-06-15), S. N.PAG |
Veröffentlichung: | 2024 |
Medientyp: | academicJournal |
ISSN: | 0301-4797 (print) |
DOI: | 10.1016/j.jenvman.2024.121194 |
Sonstiges: |
|