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]

Abstract

Preozonation on landfill leachate was carried out. COD removal rate has an obvious inflection at ozone dosage 0.186 mg_O3/mg_COD 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 mg_O3/mg_COD. 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.

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ACKNOWLEDGMENT

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

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

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

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