Solar disinfection for household treatment of roof-harvested rainwater

被引：15
作者：
Department of Civil Engineering, School of Engineering, Conchin University of Science and Technology, Kochi 682 022, India [1 ]
不详 [2 ]
机构：
[1] Department of Civil Engineering, School of Engineering, Conchin University of Science and Technology
[2] Department of Civil Engineering, SV National Institute of Technology
来源：
Water Sci. Technol. Water Supply | 2008年 / 2卷 / 153-160期
关键词：
Heterotrophic bacteria; Household treatment; Rainwater harvesting; Rainwater quality; Solar water disinfection; Total coliforms;
D O I：
10.2166/ws.2008.054
中图分类号：
学科分类号：
摘要：
The effectiveness of solar disinfection in treating roof-harvested rainwater contaminates wih microorganism was evaluated with a view to its use as a household technology. Coliform and heterotrophic bacteria inactivation kinetics were studied using bottles with differen backing surfaces. The effects of various parameters such as turbidity, solar intensity, typr og organisms (naturally occuring versus laboratory grown) and bottle volume on bacterila inactivation were studied. Complete inactivation of total coliforms was observed in 6 h when solar radiation exceeded ~500W/m2. Under high contamination and overcast conditions, prolonged, expsure was needed. Moderate turbidity (38 NTU) did not reduce the inactivation efficiency, but slightly enhanced it. No regrowth of micoorganisms was observed after 24 h following solar disinfection. No significant difference in the inactivation kinetics was observed for bottle sizes in the range of 0.5 to 2.0L. Tests with naturally occuring and laboratory-grown organisms indicated that laboratory-grown oraganisms were inactivated faster than naturally occuring oragnisms. © IWA Publishing 2008.
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页码：153 / 160
页数：7
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共 20 条
  • [1] Standard Methods for the Examination of Water and Wastewater, (1998)
  • [2] Berney M., Weilenmann H.-U., Simonetti A., Egli T., Efficacy of solar disinfection of Escherichia coli Shigella flexneri, Salmonella typhimuriam and Vibrio cholerae, J. Appl. Microbiol, 101, pp. 828-836, (2006)
  • [3] Joyce T.M., McGuigan K.G., Elmore-Meegan M., Conroy R.M., Inactivation of faecal bacteria in drinking water by solar heating, Appl. Environ. Microbiol, 62, pp. 399-402, (1996)
  • [4] Kehoe S.C., Joyce T.M., Ibrahim P., Gillespie J.B., Shahar R.A., McGuigan K.G., Effect of agitation, turbidity, aluminum foil reflectors and container volume on the inactivation efficiency of batchprocess solar disinfection, Water Res, 35, 4, pp. 1061-1065, (2001)
  • [5] Lonnen J., Kilvington S., Kehoe S.C., Al-Touati F., McGuigan K.G., Solar and photocatalytic disinfection of protozoan, fungal and bacterial microbes in drinking water, Water Res, 39, pp. 877-883, (2005)
  • [6] Lye D.J., Health risks associated with consumption of untreated water from household roof catchment systems, J. AWRA, 38, 5, pp. 1301-1306, (2002)
  • [7] McGuigan K.G., Joyce T.M., Conroy R.M., Gillespie J.B., Elmore-Meegan M., Solar disinfection of water contained in transparent plastic bottles: Characterizing the bacterial inactivation process, J. Appl. Microbiol, 84, pp. 1138-1148, (1998)
  • [8] Mani S.K., Kanjur R., Singh I.S.B., Reed R.H., Comparative effectiveness of solar disinfection using small-scale batch reactors with reflective, absorptive and tranmissive rear surfaces, Water Res, 40, pp. 721-727, (2006)
  • [9] Martin-Dominguez A., Alarcon-Herrera M.T., Martin-Dominguez I.R., Gonzalez-Herrera A., Efficiency in the disinfection of water for human consumption in rural communities using solar radiation, Solar Energy, 78, pp. 31-40, (2005)
  • [10] Meera V., Ahammed M.M., Water quality of rooftop harvesting systems: A review, J. Water Supply Res. Technol.-Aqua, 55, 4, pp. 257-268, (2006)
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