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Abstract
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Article Information:
Evaluation of the Potential of using Solar Energy to Pasteurise Drinking Water: Using Escherichia coli (E. coli) as an Indicator
N. Mhazo, N. Dlamini, A.M. Dlamini and M.T. Masarirambi
Corresponding Author: Norman Mhazo
Submitted: 2010 April, 09
Accepted: 2010 April, 24
Published: 2010 July, 10 |
Abstract:
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Potential application of a simple panel solar cooker design (Cookit) to inactivate bacteria in drinking
water was investigated. Escherichia coli (E. coli) was used as an indicator species in this study. Bacterial
contaminated water was collected from Mzimnene R iver in Manzini region of Sw aziland. Water samples were
put in Cookits and exposed to solar radiation for different time intervals (0, 30, 60, 90, 120, 150 and 180 min).
Changes in water temperature were monitored and E. coli counts (cfu/ml) were enumerated for each sample.
The standard solid plating procedure for enumerating bacteria was used. The results showed rapid decline in
E. coli count when water temperature reached about 55ºC and this was attained within 2 h of exposure to solar
radiation. The findings suggest that there is potential in using the Cookit to inactivate bacteria in drinking water.
It is recommended that further investigations be conducted at a larger scale, over longer periods and under
different weather and climatic conditions. The effectiveness of the Cookit should also be further evaluated with
more resistant waterborne bacteria, bacterial spores, protozoan cysts, and viruses.
Key words: Cookit, drinking water, Escherichia coli, panel solar cooker, , ,
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Cite this Reference:
N. Mhazo, N. Dlamini, A.M. Dlamini and M.T. Masarirambi, . Evaluation of the Potential of using Solar Energy to Pasteurise Drinking Water: Using Escherichia coli (E. coli) as an Indicator. Research Journal of Environmental and Earth Sciences, (3): Page No: 159-163.
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ISSN (Online): 2041-0492
ISSN (Print): 2041-0484 |
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