Comparison between Solar Radiation and Mother Chlorine for Water Disinfection and E. Coli

Document Type : Original Article


Department of Environmental Health, School of Health, Lorestan University of Medical Sciences, Khoramabad, Iran.


Background and Objective: The aim of water disinfection is to destroy microorganisms that case water born-diseases. The purpose of this study was to investigate the efficacy of solar disinfection method as an appropriate policy and economically feasible in comparison with mother chlorine method for water supply in small communities, emergency situations and in deprived areas.
Subjects and Methods: This laboratory scale experimental study was conducted in the summer of 2013 in the city of Khorramabad on synthetic solutions. The testes were carried out on perfectly sunny days on different degrees of turbidity, organic matter and State the different bacterial counts used. In order to determine the reduction in bacterial count in both the solar disinfection and mother chlorine were sampled and tested in multiple tube fermentation State the time intervals. Linear model analysis of variance with repeated measure analysis was performed.
Results: Both disinfection methods decreases bacterial average counts in the test periods. The bacteria removal efficiency was reduced with the increased initial bacteria count, turbidity and presence of organic matter. After the 60 min of start of treatment, the method solar radiation method, the mean number of bacteria remaining was 0.35±0.28 MPN/100 ml while with mother chlorine the mean number of bacteria remained was 32.59± 3.55 MPN/100 ml, which was 100 fold higher than solar radiation method.
Conclusions: Solar radiation method is a very suitable, cheap and reliable method for water disinfections and can be employed under climatic conditions similar to Khorramabad. This method can be applied under critical condition and in small communities.


1-Hindiyeh M, Ashraf A. Investigating the efficiency of solar energy system for drinking water disinfection 2010; (259): 208–15.
2-McGuigan KG, Conroy RM, Mosler, preez M, Ubomba-Jaswa E, Fernandez-Ibanez P. Solar water disihfection (sodis): Areview from bench-top to roof-top. Journal of Hazardous Materials 2012 Aug; (235-236): 29–46.
3-Siew LL, Anthony GF, William BK, Teik-Thye L. Emergency water supply: A review of potential technologies and selection criteria. Water Research 2012 Apr ; (4): 3125-51.
4-Clasen T, Haller L, Walker D, Bartram J, Cairncross S. Cost-effectiveness of water quality interventions for preventing diarrhoeal disease in developing countries. J Water Health 2007; 5 (4): 599-608.
5-Fisher M B, Iriarte  M, Nelson K. Solar water disinfection (SODIS) of Escherichia coli, Enterococcus spp, and MS2 coliphage: Effects of additives and alternative container materials. Water Research 2012; (4 6): 174 5 – 51.
6-Jagadeesh A. Driking Water  For All. Center for Energy and Sustainable Resources. Tamil Nadu: Engineering college kavaraipettai; 2005:1-11.
7-Acher E, Fischer R. Turnheim YM. Ecologically friendly wastewater disinfection techniques. Water Research 1997; (31):1398-1404.
8-Pelizzetti E. Solar water detoxification.Current status and perspectives. Zeitschrift fuer Physikalische Chemie 1999 July; 212(2): 207-18.
9-U.S. Enviromental Protection Agency. Ultraviolet light disinfection technology in drinking water application:an overview. EPA811-96-002.Washington: US E PA;1996.
10-Mahvi A, Vaezi F, Ali Mohamadi M, Mehrabi T M. Using sunlight to disinfect drinking water for rural. Military Medicine. 2005; 331–6. [In Persian].
11-Cervantes DXF. "Feasibility of semi-continuous solar disinfection system for developing countries at a household level". Master’s of  Engineering in Civiland Environmental Engineering Thesis, Massachusetts Institute Of Technology, 2003.
12-Sobsey M D. Managing water in the home: Accelerated Health Gains from Improved Water supply. Geneva: Department of Environmental Sciences and Engineering School of Public Health University of North Carolina; 2002 .
13-Jagadeesh A. Driking Water For All. Center for Energy and Sustainable Resources. Tamil Nadu: Engineering college kavaraipettai; 2005. P.1-11.
14-WHO. Guidelines on Technologies for Water Supply System in Small Communities. Tanslatator  Mahvi A H, Asghari A. Tehran: Avay ghalam, 2009.
 15-Guide to Water and Wastewater Sanitation in Emergencies and disasters. Pzky University of Tehran: Mht Institute of Environmental; 2012.
16-Centre for Affordable Water and Sanitation Technology(CAWST). Household Water Treatment and Safe Storage Factsheet: Source Protection; 2010.
17-Masombigi H. A simple method of treating an emergency Bdr. Pzky University of Baghiyatola Tehran Quarterly of Health Education Schools 2011; (42): 34-44.
18-WHO/UNICEF Joint Monitoring Programme for Water Supply and Sanitation. Global water supply and sanitation assessment  report. U.S.A: World Health Organization and United Nations Children's Fund; 2000.
19-Dunlop  PSM, Ciavola M, Rizzo L, Byrne J A .Inactivation and injury assessment of Escherichia coli during solar and photocatalytic disinfection in LDPE bags. Chemosphere 201; 85: 1160-66.
20-Miranzadeh MB, Hasanzadeh M, Dehqan S, Sabahi-Bidgoli M. The relationship between turbidity, residual chlorine concentration and microbial quality of drinking water in rural areas of Kashan during 2008-9. Feyz, Journal of Kashan University of Medical Sciences 2011; 15( 2): 126-131.
21-Rojko Ch. "Solar disinfection of drinking water". Master’s of  Environmental engineering Thesis, Worcester polytechnic institute, 2003.
 22-Tripathi BD, Govil SR. Water pollution (an expertimental approch). Translated by Ahizade M. Tehran: Mojesabz; 2003.
23-APH, AWWA,WEF. Standard Methods for the Examination of Water and Waste Water. 21th ed. Washington: AmericanvPublic Health Association(APHA); 2005.
24-Saremi M, Saremi MA. Laboratory cultures (quality control applications) as well as color atlas media. Tehran: Health Laboratory, Ministry of Health and Medical Education; 2008.
25-Zazouli M A, Bazrafshan E. Water and Wastewater Technolog. Tehran: Samat; 2009.
26-Water Pollution Control Federation(WPCF). Microbial testing of water and wastewater. Translated by Emtiyazi G, Etemadifar Z. Esfahan: Mani; 2007.
27-Ubomba-Jaswa E, Navntoft C, Polo-Lopez MI, Fernandez- Ibanez P, McGuigan KG. Solar disinfection of drinking water (SODIS): an investigation of the effect of UV-A dose on inactivation efficiency. Photochem Photobiol Sci 2009 May; 8(5): 587-95.
28-Gomes AI, Vilar VJP, Boaventura RAR. Synthetic and natural waters disinfection using natural solar radiation in a pilot plant with CPCs. Proceeding of 5th European Conference on Solar Chemistry and Photocatalysis: Environmental Applications; 20084-8 Oct; Palermo, Italy. P. 55-61.
 29-Acra, Aftim. Solar Disinfection of Drinking Water and Oral Rehydratation Solutions. Guideline for Household Applications in Developing Countries. Department of Environmental Health. USA: American University of Beirut 1984.
30-Wegeling M, Canonica S, Mechsner K, Fleischmann T, Pesaro F, Metzler A. Solar Disinfection: Scope of the Process and Analysis of Radiation Experiments. Water SRT-Aqua 1994; 43(3): 154-169.
31-Solar water disinfection.2013. Wikipedia.  Avilable at: http://en. /wiki/ Solar_ water_ disinfection.  Accessed Nov, 2013.
32-Ahmad M F, Saleem M .Disinfection of municipal water using solar radiation: an economical appoach for rural dwellers in the coastal region of karachi. The Nucleus 2010; 47(2): 165-71.
33-Kehoe SC, Joyce TM, Ibrahim P, Gillespie JB, Shahar R A, Mc Gugan KG. Effect of agitation, turbidity,ahminium foil refflectors and containner volum on the inactivation efficiency of batch-process solar disinfectors. water research 2001Mar; 35(2):1061-65.
34-Smith M. "Microbial Contamination and Removal from Drinking Water in the Terai Region in Nepal." Master’s of Engineering Thesis, Massachusetts Institute of Technology, 2001.
35-Reed RH. Solar inactivation of fecal bacteria in water: the critical role of oxygen. Letters in Applied Chemistry 1997Apr; 24(4): 276-80.
36-Davies CM, Roser DJ, Feitz AJ, Ashbolt NJ .Solar radiation disinfection of drinking water at temperate latitudes: inactivation rates for an optimised reactor configuration. water research 2009; 43(3): 643-52.
37-Schmid P, Kohler M, Meierhofer R, Luzi S, Wegelin M.  Does the reuse of PET bottles during solar water disinfection pose a health risk due to the migration of plasticisers and other chemicals into the water. water research 2008 Dec; 42(20): 5054 –60.
38-Hosiniyan M. The Principles Water Tretment. Tehran: Hosiniyan; 2002.
39-Masombigi H, Karimi- Zarchi AA. Study of Disinfection of Drinking Water at Army garrisons. Military Medicine 2003; 6(3): 159-65.
40-Renolds T D, Rechard PA. Unit Operation and Processes in Environmental Engineering. Translated by Torkian A, Mardan S. Tehran: Industrial Estates Tehran; 2001.Vol. 2.p.847-850.
41-Qasim S R, Motley E M, Zho G. water works engineering: planning, design and operation. Translated by Mosavi G. Tehran: Entesharat Hafiz; 2009.Vol.2 p.112-114
42-Malcolm P. Guidance Manual for Compliance with Filtration and Disinfection Requirments for Public Water Supply Systems Using Surface Water Sources. USEPA: Sceince and Technology Branch Washington; 1990.
43-Clasen T, Haller L, Walker D, Bartram J, Cairncross S. Cost-effectiveness of water quality interventions for preventing diarrhoeal disease in developing countries. J Water Health 2007; 5 (4): 599-608.
44-Boyle M, Sichel C, Ferna N, Arias-Quiroz G B, Iriarte-Pun M, Mercado A, "et al". Bactericidal Effect of Solar Water Disinfection under Real Sunlight Conditions. Microbiology 2008; 74(10): 2997–3001.