Ozonation within an Activated Sludge System for Azo Dye Removal by Partial Oxidation and Biodegradation

Pre-ozonation is often uneconomical for typical wastewaters with varied mixtures of organic compounds as more biodegradables than non-biodegradables are oxidized, all requiring ozone. The concept developed in this paper is ozonation within an activated sludge system to oxidize recalcitrant substance...

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Bibliographic Details
Published in:Ozone: science & engineering 2009-08, Vol.31 (4), p.279-286
Main Authors: van Leeuwen, J. (Hans), Sridhar, Anand, Esplugas, Marc, Onuki, Shinnosuke, Cai, Lingshuang, Koziel, Jacek A.
Format: Article
Language:English
Subjects:
Activated Sludge
Applied sciences
Azo
Azo Dye
Bacteria
Biodegradability
Biodegradation
Biological
Biosorption
Color Removal
Degradation
Dyes
Exact sciences and technology
Gc-Ms
General purification processes
Orange II By-products
Ozonation
Ozone
Pollution
Solid Phase Microextraction
Waste water
Wastewaters
Water treatment and pollution
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Summary:Pre-ozonation is often uneconomical for typical wastewaters with varied mixtures of organic compounds as more biodegradables than non-biodegradables are oxidized, all requiring ozone. The concept developed in this paper is ozonation within an activated sludge system to oxidize recalcitrant substances to more degradable forms and byproducts and to immediately assimilate or biodegrade these within the biological system. The focus was on a novel method of combining ozonation and biological treatment in one integrated unit without adversely affecting the bacterial population responsible for the biological degradation. An azo dye, spiked into the wastewater feed was used to study removal of a recalcitrant compound in a biological system.
ISSN:0191-9512
1547-6545
DOI:10.1080/01919510902907720