Enhanced volatile fatty acids production of waste activated sludge under salinity conditions: Performance and mechanisms

Su, Gaoqiang., Wang, Shuying., Yuan, Zhiguo. and Peng, Yongzhen. (2015) Enhanced volatile fatty acids production of waste activated sludge under salinity conditions: Performance and mechanisms. Journal of Bioscience and Bioengineering, 121 3: 293-298. doi:10.1016/j.jbiosc.2015.07.009


Author Su, Gaoqiang.
Wang, Shuying.
Yuan, Zhiguo.
Peng, Yongzhen.
Title Enhanced volatile fatty acids production of waste activated sludge under salinity conditions: Performance and mechanisms
Journal name Journal of Bioscience and Bioengineering   Check publisher's open access policy
ISSN 1347-4421
1389-1723
Publication date 2015-08-29
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.jbiosc.2015.07.009
Open Access Status Not Open Access
Volume 121
Issue 3
Start page 293
End page 298
Total pages 6
Place of publication Suita, Osaka, Japan
Publisher Elsevier
Language eng
Subject 1305 Biotechnology
1502 Bioengineering
2402 Applied Microbiology and Biotechnology
Abstract Volatile fatty acids (VFAs) are essential for removing biological nitrogen and phosphorus in wastewater treatment plants. The purpose of this work was to investigate whether and how the addition of NaCl could improve the production of VFAs from waste activated sludge (WAS). Sludge solubilization was efficiently improved by the addition of NaCl. Both protein and carbohydrate in the fermentation liquid increased with the dosage of NaCl, and it provided a larger amount of organic compounds for the production of the VFAs. NaCl had inhibitory effects on the production of methane and a high dosage of NaCl could severely suppress the growth of methanogens, which decreased the consumption of the VFAs. Consequently, the production of VFAs was significantly enhanced by the addition of NaCl. The maximum production of VFAs was achieved with the highest dosage of NaCl (3316 mg (COD)/L at the NaCl dosage 0.5 mol/L; 783 mg (COD)/L without the addition of NaCl). Therefore, this study indicates that using NaCl could be an efficient method for improving the production of VFAs from WAS.
Keyword Waste activated sludge
Sodium chloride
Volatile fatty acid
Hydrolysis
Acidification
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID 51178007
2012AA063406
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
Advanced Water Management Centre Publications
 
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