Evaluation of Persulfate / UV advanced oxidation process in disinfection of municipal wastewater

Mohseni Bandpey, Anoushiravan and Nemati, Reza and Hakimi, Narges and Norouz, Parviz (2017) Evaluation of Persulfate / UV advanced oxidation process in disinfection of municipal wastewater. Journal of Sabzevar University of Medical Sciences, 24 (5). pp. 333-338.

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Abstract

Background: Recent research has shown that an Advanced Oxidation Process known as Persulfate/UV, has a high capability in removing of persistent organic pollutants. Given that the advantages of this process are limited production of harmful byproducts and strong ability for degradation of persistent organic thus it seems this process be also suitable for disinfection of municipal wastewater treatment plant effluents. Materials & Methods: After collection, the effluent samples were transferred to the lab. Then the disinfection experiments were carried out in a 1 L sterile reactor with 0.5 L of sample and various doses were injected. The direct method was used to measure the microbial populations (thermo-tolerant coliforms). Results: The result of this research indicated that Persulfate and UV irradiation cannot be able to meet the needs of thermo tolerant coliforms inactivation, but simultaneous using of them (Persulfate/UV) could inactivated approximately 5 logs thermo-tolerant coliforms (Persulfate dose <30 mM). While Persulfate (without UV irradiation) even with 300 mM could inactivated less than 3 logs thermo-tolerant coliforms. Conclusion: The results of this research show UV irradiation has a strong synergistic effect on persulfate disinfection efficiency. Due to the restriction of the use of sulfur compounds in wastewater treatment, it seems that the use of UV irradiation with less amounts of persulfate can largely improve this restriction and significantly reduce the economic and environmental impact of traditional disinfectants. Keywords Persulfate; thermo-tolerant coliforms; free radicals; UV; disinfection

Item Type: Article
Subjects: R Medicine > R Medicine (General)
Depositing User: Saeed Shoja
Date Deposited: 21 Feb 2018 05:02
Last Modified: 21 Feb 2018 05:02
URI: http://eprints.medsab.ac.ir/id/eprint/32

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