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Enhancement mechanisms of short-time aerobic digestion for waste activated sludge in the presence of cocoamidopropyl betaine


Abstract Cocoamidopropyl betaine (CAPB), which is a biodegradable ampholytic surfactant, has recently been found to dramatically enhance the aerobic digestion of waste activated sludge (WAS) in short-time aerobic digestion (STAD) systems. Therefore, it is important to understand the mechanisms in which CAPB enhances WAS aerobic digestion performance. Results showed that CAPB could dramatically enhance the solubilization of soluble proteins (PN), polysaccharides (PS), nucleic acids (NA) and humic-like substances (HS) in the STAD system within the initial 2 h. Then PN, PS and NA gradually decreased, while HS showed only minor decease. In addition, CAPB increased the proportion of low MW fractions (<20 kDa) from 4.22% to 39.4%, which are more biodeg... (more)
Created Date 2017-10-18
Contributor Xia, Siqing (Author) / Zhou, Yun (ASU author) / Eustance, Everett (ASU author) / Zhang, Zhiqiang (Author) / Biodesign Institute / Swette Center for Environmental Biotechnology
Series SCIENTIFIC REPORTS
Type Text
Extent 9 pages
Language English
Identifier DOI: 10.1038/s41598-017-13223-4 / ISSN: 2045-2322
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Citation Xia, S., Zhou, Y., Eustance, E., & Zhang, Z. (2017). Enhancement mechanisms of short-time aerobic digestion for waste activated sludge in the presence of cocoamidopropyl betaine. Scientific Reports, 7(1). doi:10.1038/s41598-017-13223-4
Note The final version of this article, as published in Scientific Reports, can be viewed online at: http://www.nature.com/articles/s41598-017-13223-4
Collaborating Institutions ASU Library
Additional Formats MODS / OAI Dublin Core / RIS


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