A comparison between advanced O3/UV and H2O2/UV oxidation processes for the treatment of municipal solid waste leachate

Mostafaei, G.R. and Dehghani, R. and Hasanzadeh, M. and Moosavi, G.A. (2012) A comparison between advanced O3/UV and H2O2/UV oxidation processes for the treatment of municipal solid waste leachate. Feyz Journal of Kashan University of Medical Sciences, 16.

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Official URL: http://feyz.kaums.ac.ir/article-1-1377-en.html
DOI: UNSPECIFIED

Abstract

Background: The solid-waste leachate is a type of wastewater with high concentration of mineral and organic compounds. There is little information about the effect of the advanced oxidation processes for the treatment of municipal solid-waste leachate. Thus, this study aimed to evaluate the effectiveness of processing advanced oxidation method as a biological pre-treatment for municipal solid waste.Materials and Methods: This bench-scale experimental study was conducted in a closed batch system on leachate samples of Kahrizak landfill (Tehran). After obtaining the optimal conditions for the O3/UV and H2O2/UV processes, the effect of each process on 20 leachate samples was assessed and for each sample, 4 different reaction times were studied for the removal of BOD5, COD, TS and color. The results were compared using the mixed-design ANOVA model.Results: The BOD5, COD and TS in raw leachate were 2500, 21910 and 29347 mg/l, respectively. The O3/UV and H2O2/UV processes removed 87 and 73 of COD, respectively. The BOD5/COD ratio in the O3/UV and H2O2/UV processes increased from 0.11 to 0.33 and 0.11 to 0.12, respectively. Moreover, the color in the O3/UV and H2O2/UV processes decreased from 82 to 67.25 and 81.65, respectively.Conclusion: The O3/UV process can be used as a biological pre-treatment. The optimum pH for this process is 8.5, the optimum ozone concentration is 60.1 g/kg of decreased COD and the best reaction time which increases the BOD5/COD ratio more than 0.25 and less expensive than other reaction times, is 10 minutes.

Item Type: Article
Subjects: Environmental Science
Divisions: Feyz journal
Depositing User: ART . editor
Date Deposited: 09 May 2017 14:55
Last Modified: 03 Jun 2017 13:26
URI: http://eprints.kaums.ac.ir/id/eprint/1893

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