Improving the Biodegradation of Organic Pollutants with Ozonation during Biological Wastewater Treatment Koziel, Jacek van Leeuwen, Johannes Sridhar, Anand Harrata, Abdel Kamel Esplugas, Marc Onuki, Shinnosuke Cai, Lingshuang van Leeuwen, Johannes Koziel, Jacek
dc.contributor.department Food Science and Human Nutrition
dc.contributor.department Civil, Construction and Environmental Engineering
dc.contributor.department Chemistry
dc.contributor.department Agricultural and Biosystems Engineering
dc.contributor.department Toxicology 2018-04-12T17:32:24.000 2020-06-29T22:43:41Z 2020-06-29T22:43:41Z Thu Jan 01 00:00:00 UTC 2009 2009-01-01
dc.description.abstract <p>Pre-ozonation is often used to enhance the biodegradability of recalcitrant compounds prior to biological treatment of wastewater. A usual shortcoming of such an approach is wasting ozone on other compounds that are already biodegradable. This research followed a groundbreaking approach of degrading a recalcitrant substance with ozone during biological treatment. Two parallel bench-top activated sludge processes were fed a synthetic wastewater containing typical biodegradable substances and also methylene blue at 5 mg/L. Ozone was applied continuously and directly into one of the activated sludge units at 17 mg/L based on inflow rate. The methylene blue was removed by 95% in the ozonated process compared with just 40% removal in the non-ozonated control. The removal in the activated sludge without ozonation was demonstrated to be mainly due to biosorption. The ozone oxidation reaction by-products were analyzed using GC-MS on volatile substances collected in the headspace above ozonated samples of methylene blue and most found to be biodegradable. These by-products are expected to be degraded and assimilated in the same process unit together with the other biodegradables in the feed stream by the activated sludge process. The reaction rate with organic substances depleted the dissolved ozone at such a rate that the inactivation of the treatment bacteria (and protozoa) was minimal, mostly affecting the filamentous bacteria. A concern that ozone, as a powerful disinfectant, could inhibit or kill the beneficial bacteria in the activated sludge process was proven to be incorrect.</p>
dc.description.comments <p>This is an Accepted Manuscript of an article published by Taylor & Francis as Van Leeuwen, J., Anand Sridhar, A. Kamel Harrata, Marc Esplugas, Shinnosuke Onuki, Lingshuang Cai, and Jacek A. Koziel. "Improving the biodegradation of organic pollutants with ozonation during biological wastewater treatment." <em>Ozone: Science & Engineering</em> 31, no. 2 (2009): 63-70. Available online DOI: <a href="" target="_blank">10.1080/01919510802668380</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/
dc.identifier.articleid 2189
dc.identifier.contextkey 11948144
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_pubs/918
dc.language.iso en
dc.source.bitstream archive/|||Sat Jan 15 02:29:16 UTC 2022
dc.source.uri 10.1080/01919510802668380
dc.subject.disciplines Agriculture
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.disciplines Environmental Sciences
dc.subject.keywords Ozone
dc.subject.keywords Activated Sludge
dc.subject.keywords Biodegradability
dc.subject.keywords Dye
dc.subject.keywords Methylene Blue
dc.subject.keywords Ozonolysis By-products
dc.title Improving the Biodegradation of Organic Pollutants with Ozonation during Biological Wastewater Treatment
dc.type article
dc.type.genre article
dspace.entity.type Publication
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