Journal
BIORESOURCE TECHNOLOGY
Volume 240, Issue -, Pages 192-196Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.03.016
Keywords
WAS; Pretreatment; Anaerobic fermentation; SCFAs; Phosphorus release
Funding
- National Science Foundation of China [21377079, 51578329]
- Program for Innovation Research Team in University [IRT13078]
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Waste activated sludge (WAS) was pretreated by acid or alkali to enhance the anaerobic fermentation (AF) for phosphorus (P) and short-chain fatty acids (SCFAs) release into the liquid simultaneously. With acid pretreatment, the released total P concentration achieved 120 mg/L, which was 71.4% higher than that with alkali pretreatment. In addition, alkali pretreatment enhanced organic P release with about 35.3% of organic P in the solid being converted to inorganic P, while little had changed with acid pretreatment. The results also showed that acid and alkali pretreatment enhanced SCFAs production by 15.3 and 12.5 times, respectively. Acid pretreatment could be preferred for simultaneous recovery of P and SCFAs by AF. (C) 2017 Elsevier Ltd. All rights reserved.
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