Influence of thermal hydrolysis pretreatment on physicochemical properties and anaerobic biodegradability of waste activated sludge with different solids contentopen access
- Authors
- Jeong, Seong Yeob; Chang, Soon Woong; Ngo, Huu Hao; Guo, Wenshan; Nghiem, Long D.; Banu, J. Rajesh; Jeon, Byong Hun; Dinh Duc Nguyen
- Issue Date
- Feb-2019
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Thermal pretreatment; Sludge properties; Wastewater activated sludge; Anaerobic digestion; Biomethane potential
- Citation
- WASTE MANAGEMENT, v.85, pp.214 - 221
- Indexed
- SCIE
SCOPUS
- Journal Title
- WASTE MANAGEMENT
- Volume
- 85
- Start Page
- 214
- End Page
- 221
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/148402
- DOI
- 10.1016/j.wasman.2018.12.026
- ISSN
- 0956-053X
- Abstract
- The influence of thermal hydrolysis pretreatment (THP) on physicochemical properties (pH, total solids, volatile solids, chemical oxygen demand, total nitrogen, ammonium nitrogen, volatile fatty acids, viscosity, and cell morphology) and anaerobic biodegradability of highly concentrated waste activated sludge (WAS) with TS content ranging from 1 to 7% was evaluated at different temperatures ranging from 100 to 220 degrees C. The biomethane potential (BMP) of the WAS was systematically analyzed and evaluated. Images of its cellular structure were also analyzed. The results indicated that THP is a useful method for solubilizing volatile solids and enhancing CH4 production regardless of the TS content of the WAS feed. The ultimate CH4 production determined from the BMP analysis was 313-348 L CH4/kg VS (72.6-74.1% CH4) at the optimum THP temperature of 180 degrees C. The results showed that THP could improve both the capacity and efficiency of anaerobic digestion, even at a high TS content, and could achieve the dual purpose of sludge reduction and higher energy recovery.
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