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Ozone: Science & Engineering
The Journal of the International Ozone Association
Volume 36, 2014 - Issue 5
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Original Articles

Optimum Ozone Dosage of Preozonation and Characteristic Change of Refractory Organics in Landfill Leachate

Yanrui CuiSchool of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory of Environmental Pollution Control, Xinxiang, 453007, China;School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007, China
,
Qing WuSchool of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory of Environmental Pollution Control, Xinxiang, 453007, China
,
Songna XiaoSchool of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory of Environmental Pollution Control, Xinxiang, 453007, China
,
Xin AnSchool of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007, China
,
Jianhui SunSchool of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory of Environmental Pollution Control, Xinxiang, 453007, China
&
Fengling CuiSchool of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007, ChinaCorrespondence[email protected]
Pages 427-434 | Received 12 Aug 2013, Accepted 06 Dec 2013, Published online: 11 Sep 2014
 
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Abstract

Preozonation on landfill leachate was carried out. COD removal rate has an obvious inflection at ozone dosage 0.186 mgO3/mgCOD in ozonation process. Seven sets of identical O3-SBR combined process under different ozone dosages were studied. The results indicated that the best COD removal rate of synergetic effect is also at 0.186 mgO3/mgCOD. New organic substances produced after ozonation was confirmed by an excitation-emission matrix (EEM). Carbon dioxide production increased from 36.3 mg to 75.7 mg after ozonation, confirming that biodegradability of refractory organics in landfill leachate was enhanced. All the arguments indicated that the inflection point of COD removal by ozonation has a great significance for preozonation.

ACKNOWLEDGMENT

This study was conducted by the Innovation Scientists and Technicians Troop Construction Projects of Henan Province.

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