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

Paper ID Volume ID Publish Year Pages File Format Full-Text
20036 43154 2016 6 PDF Available
Title
Enhanced volatile fatty acids production of waste activated sludge under salinity conditions: Performance and mechanisms
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.

Keywords
Waste activated sludge; Sodium chloride; Volatile fatty acid; Hydrolysis; Acidification
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Enhanced volatile fatty acids production of waste activated sludge under salinity conditions: Performance and mechanisms
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Bioscience and Bioengineering - Volume 121, Issue 3, March 2016, Pages 293–298
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us