Polyhydroxyalkanoates in waste activated sludge enhances anaerobic methane production through improving biochemical methane potential instead of hydrolysis rate

Wang, Qilin, Sun, Jing, Zhang, Chang, Xie, Guo-Jun, Zhou, Xu, Qian, Jin, Yang, Guojing, Zeng, Guangming, Liu, Yiqi and Wang, Dongbo (2016) Polyhydroxyalkanoates in waste activated sludge enhances anaerobic methane production through improving biochemical methane potential instead of hydrolysis rate. Scientific Reports, 6 Art No.: 19713: . doi:10.1038/srep19713


Author Wang, Qilin
Sun, Jing
Zhang, Chang
Xie, Guo-Jun
Zhou, Xu
Qian, Jin
Yang, Guojing
Zeng, Guangming
Liu, Yiqi
Wang, Dongbo
Title Polyhydroxyalkanoates in waste activated sludge enhances anaerobic methane production through improving biochemical methane potential instead of hydrolysis rate
Journal name Scientific Reports   Check publisher's open access policy
ISSN 2045-2322
Publication date 2016-01-21
Year available 2016
Sub-type Article (original research)
DOI 10.1038/srep19713
Open Access Status DOI
Volume 6
Issue Art No.: 19713
Total pages 9
Place of publication London, United Kingdom
Publisher Nature Publishing Group
Language eng
Subject 1000 General
Formatted abstract
Anaerobic sludge digestion is the main technology for sludge reduction and stabilization prior to sludge disposal. Nevertheless, methane production from anaerobic digestion of waste activated sludge (WAS) is often restricted by the poor biochemical methane potential and slow hydrolysis rate of WAS. This work systematically investigated the effect of PHA levels of WAS on anaerobic methane production, using both experimental and mathematical modeling approaches. Biochemical methane potential tests showed that methane production increased with increased PHA levels in WAS. Model-based analysis suggested that the PHA-based method enhanced methane production by improving biochemical methane potential of WAS, with the highest enhancement being around 40% (from 192 to 274 L CH4/kg VS added; VS: volatile solid) when the PHA levels increased from 21 to 143 mg/g VS. In contrast, the hydrolysis rate (approximately 0.10 d−1) was not significantly affected by the PHA levels. Economic analysis suggested that the PHA-based method could save $1.2/PE/y (PE: population equivalent) in a typical wastewater treatment plant (WWTP). The PHA-based method can be easily integrated into the current WWTP to enhance methane production, thereby providing a strong support to the on-going paradigm shift in wastewater management from pollutant removal to resource recovery.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
Advanced Water Management Centre Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 6 times in Thomson Reuters Web of Science Article | Citations
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Created: Sun, 07 Feb 2016, 00:20:13 EST by Qilin Wang on behalf of Learning and Research Services (UQ Library)