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Evaluation of Health, Environmental, Economic and Technical Aspects of Disinfection of Wwtp Effluent in the North of Isfahan With Uv Instead of Chlorine



Hashemi H1 ; Amin MM2 ; Ebrahimi A3 ; Rezaie R4 ; Safari M4
Authors
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Authors Affiliations
  1. 1. Environmental Health Engineering Dept, Faculty of Medical Sciences, Shahrekord, Iran
  2. 2. Environment research center, Department of Health, Isfahan University of Medical Sciences, Isfahan, Iran
  3. 3. Environmental Health Engineering Dept, Faculty of Medical Sciences, Yazd, Iran
  4. 4. Environmental Health Engineering Dept, Faculty of Medical Sciences, Sanandaj, Iran

Source: Scientific Journal of Kurdistan University of Medical Sciences Published:2011

Abstract

Background and aim: Today, chlorine is the most common material used for effluent disinfection. Chlorination is an established and effective method for effluent disinfection. But the use of chlorine for disinfection of effluent due to several major concerns should be reassessed. The aim of this study was to compare long-term benefits and costs of chlorination/de chlorination with those of UV by pilot studies. Material and Methods: This pilot study consisted of pre-treatment units clarification and filtration systems with two types of low pressure and medium pressure UV lamps designed and installed at the wastewater treatment plant in the north of Isfahan. Results:Medium pressure UV systems with dose of 230 mw.s/cm2 for disinfection of filtered effluent with SOR of 1090 lit/m2.hr is more economical than a low pressure system and chlorination/dechlorination process and has the least environmental and health adverse effects. Conclusion: In wastewater treatment plants use of UV disinfection technology should be considered in preference to chlorination, especially if the dechlorination of chlorinated effluent is required. Before application of this system pilot studies on actual effluent at plant sites are required.
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