Pilot-scale studies of combined clarification, filtration, and ultraviolet radiation systems for disinfection of secondary municipal wastewater effluent

Amin, M.M. and Hashemi, H. and Bina, B. and Movahhedian Attar, H. and Farrokhzadeh, H. and Ghasemian, M. (2010) Pilot-scale studies of combined clarification, filtration, and ultraviolet radiation systems for disinfection of secondary municipal wastewater effluent. Desalination, 260 (1-3). pp. 70-78.

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Abstract

Disinfection of municipal wastewater effluent was evaluated using three alternatives, including: (1) low-pressure (LP)+medium-pressure (MP) UV lamps; (2) clarifier+LP+MP; and (3) pressurized sand filter+ LP+MP. Total coliform (TC), fecal coliform (FC), fecal Streptococcus (FS), TSS, several physicochemical parameters, absorbtivity and UV transmittance (UVT; ) were tested. The UVT for secondary, clarified and filtered effluents were 3.5, 34 and 50, respectively. A 15 photo-reactivation in secondary effluent disinfected by LP lamp was observed, while it was limited to 0.03 by the MP lamp after filtration. Filtration to a surface overflow rate (SOR) of 1050 L/m2h, followed by MP irradiation at a dose of 230 mW s/cm2 was an effective alternative to reduce the TC, FC, and FS in the disinfected secondary effluent. Filtration+MP lamp met the standards of 1000 TC and 400 FC/100 mL for effluent discharge to receiving waters. This process can also inactivate FS, effecting a 6-log reduction. Among the evaluated alternatives, none of the other treatment systems performed as well as the pressurized sand filter+MP lamp, making this the best combination for post-treatment and disinfection of secondary effluent from a well-run wastewater treatment plant. © 2010 Elsevier B.V. All rights reserved.

Item Type: Article
Additional Information: cited By
Uncontrolled Keywords: Combined process; Effluent discharge; Fecal coliforms; Fecal streptococci; Log reductions; Municipal wastewaters; Physicochemical parameters; Pilot-scale study; Post treatment; Pressurized sand filtration; Receiving waters; Sand filter; Secondary effluent; Surface overflow rates; Treatment systems; UV lamps; Wastewater treatment plants, Clarification; Clarifiers; Disinfection; Effluent treatment; Effluents; Sand; Solar radiation; Ultraviolet radiation; Wastewater; Wastewater treatment; Water treatment plants, Filtration, absorption; disinfection; effluent; filtration; parameterization; performance assessment; physicochemical property; ultraviolet radiation; wastewater; water treatment, Streptococcus
Subjects: WA Public Health > Public Health Education WA.18 > WA 30 Social, Economic, and Environmental factor in public health
WA Public Health > WA 30 Social, Economic, and Environmental factor in public health
Divisions: Faculty of Health > Department of Environmental Health
Depositing User: zahra bagheri .
Date Deposited: 20 Aug 2017 08:52
Last Modified: 20 Aug 2017 08:52
URI: http://eprints.skums.ac.ir/id/eprint/3318

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