Interpreting the synergistic effect in combined ultrasonication-ozonation sewage sludge pre-treatment

The sequential combination of ultrasonication and ozonation as sewage sludge treatment prior to anaerobic digestion was investigated. Synergistic volatile suspended solids (VSS) solubilization was observed when low energy ultrasonication (<12 kJ g−1 TS) was followed by ozonation. 0.048 g O3 g−1 T...

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Main Authors: Tian, Xinbo, Wang, Chong, Trzcinski, Antoine Prandota, Lin, Leonard, Ng, Wun Jern
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2015
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Online Access:https://hdl.handle.net/10356/104317
http://hdl.handle.net/10220/36086
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1043172020-09-26T21:57:44Z Interpreting the synergistic effect in combined ultrasonication-ozonation sewage sludge pre-treatment Tian, Xinbo Wang, Chong Trzcinski, Antoine Prandota Lin, Leonard Ng, Wun Jern School of Civil and Environmental Engineering Public Utilities Board of Singapore Nanyang Environment and Water Research Institute DRNTU::Engineering::Environmental engineering::Waste management The sequential combination of ultrasonication and ozonation as sewage sludge treatment prior to anaerobic digestion was investigated. Synergistic volatile suspended solids (VSS) solubilization was observed when low energy ultrasonication (<12 kJ g−1 TS) was followed by ozonation. 0.048 g O3 g−1 TS ozonation induced the maximum VSS solubilization of 41.3% when the sludge was pre-ultrasonicated at 9 kJ g−1 TS; while, the same ozone dosage applied without prior ultrasonication only induced 21.1% VSS solubilization. High molecular weight (MW) components (MW > 500 kDa) were found to be the main solubilization products when sludge was only ozonated. However, solubilization products by ozone were mainly in the form of low MW components (MW < 27 kDa) when sludge was pre-ultrasonicated. The high MW products generated by ultrasound were effectively degraded in the subsequent ozonation. Anaerobic biodegradability increased by 34.7% when ultrasonication (9 kJ g−1 TS) and ozonation (0.036 g O3 g−1 TS) were combined sequentially. The maximum methane production rate increased from 3.53 to 4.32, 4.21 and 4.54 mL CH4 d−1 after ultrasonication, ozonation and ultrasonication–ozonation pre-treatments, respectively. Accepted version 2015-07-14T01:22:12Z 2019-12-06T21:30:17Z 2015-07-14T01:22:12Z 2019-12-06T21:30:17Z 2015 2015 Journal Article Tian, X., Wang, C., Trzcinski, A. P., Lin, L., & Ng, W. J. (2015). Interpreting the synergistic effect in combined ultrasonication-ozonation sewage sludge pre-treatment. Chemosphere, 140, 63-71. 0045-6535 https://hdl.handle.net/10356/104317 http://hdl.handle.net/10220/36086 10.1016/j.chemosphere.2014.09.007 en Chemosphere © 2014 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by Chemosphere, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1016/j.chemosphere.2014.09.007]. 38 p. application/pdf
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Engineering::Environmental engineering::Waste management
spellingShingle DRNTU::Engineering::Environmental engineering::Waste management
Tian, Xinbo
Wang, Chong
Trzcinski, Antoine Prandota
Lin, Leonard
Ng, Wun Jern
Interpreting the synergistic effect in combined ultrasonication-ozonation sewage sludge pre-treatment
description The sequential combination of ultrasonication and ozonation as sewage sludge treatment prior to anaerobic digestion was investigated. Synergistic volatile suspended solids (VSS) solubilization was observed when low energy ultrasonication (<12 kJ g−1 TS) was followed by ozonation. 0.048 g O3 g−1 TS ozonation induced the maximum VSS solubilization of 41.3% when the sludge was pre-ultrasonicated at 9 kJ g−1 TS; while, the same ozone dosage applied without prior ultrasonication only induced 21.1% VSS solubilization. High molecular weight (MW) components (MW > 500 kDa) were found to be the main solubilization products when sludge was only ozonated. However, solubilization products by ozone were mainly in the form of low MW components (MW < 27 kDa) when sludge was pre-ultrasonicated. The high MW products generated by ultrasound were effectively degraded in the subsequent ozonation. Anaerobic biodegradability increased by 34.7% when ultrasonication (9 kJ g−1 TS) and ozonation (0.036 g O3 g−1 TS) were combined sequentially. The maximum methane production rate increased from 3.53 to 4.32, 4.21 and 4.54 mL CH4 d−1 after ultrasonication, ozonation and ultrasonication–ozonation pre-treatments, respectively.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Tian, Xinbo
Wang, Chong
Trzcinski, Antoine Prandota
Lin, Leonard
Ng, Wun Jern
format Article
author Tian, Xinbo
Wang, Chong
Trzcinski, Antoine Prandota
Lin, Leonard
Ng, Wun Jern
author_sort Tian, Xinbo
title Interpreting the synergistic effect in combined ultrasonication-ozonation sewage sludge pre-treatment
title_short Interpreting the synergistic effect in combined ultrasonication-ozonation sewage sludge pre-treatment
title_full Interpreting the synergistic effect in combined ultrasonication-ozonation sewage sludge pre-treatment
title_fullStr Interpreting the synergistic effect in combined ultrasonication-ozonation sewage sludge pre-treatment
title_full_unstemmed Interpreting the synergistic effect in combined ultrasonication-ozonation sewage sludge pre-treatment
title_sort interpreting the synergistic effect in combined ultrasonication-ozonation sewage sludge pre-treatment
publishDate 2015
url https://hdl.handle.net/10356/104317
http://hdl.handle.net/10220/36086
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