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Impact of solar radiation in disinfecting drinking water contaminated with Giardia duodenalis and Entamoeba histolytica/dispar at a point-of-use water treatment

To determine the impact of natural sunlight in disinfecting water contaminated with cysts of Giardia duodenalis and Entamoeba histolytica/dispar using plastic containers. Known quantities of Giardia duodenalis and Entamoeba histolytica/dispar cysts in sterile water were exposed to the sun. Container...

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Published in:Journal of applied microbiology 2009-03, Vol.106 (3), p.847-852
Main Authors: Mtapuri-Zinyowera, S, Midzi, N, Muchaneta-Kubara, C.E, Simbini, T, Mduluza, T
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cited_by cdi_FETCH-LOGICAL-c4534-69848e7420afe6fa8096e137f95286798485436900fc1fad3ea7a18db97dbc143
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container_title Journal of applied microbiology
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creator Mtapuri-Zinyowera, S
Midzi, N
Muchaneta-Kubara, C.E
Simbini, T
Mduluza, T
description To determine the impact of natural sunlight in disinfecting water contaminated with cysts of Giardia duodenalis and Entamoeba histolytica/dispar using plastic containers. Known quantities of Giardia duodenalis and Entamoeba histolytica/dispar cysts in sterile water were exposed to the sun. Containers were made of polyethylene terephthalate, eight painted black on one side, one not painted and another cut open at the top and the last was a high density polypropylene container. Viability testing was performed using vital and fluorescent dyes. The same assays were conducted under cloudy conditions. Thermal control tests were also performed using heat without ultra violet light from the sun. Results show that 99·9% of parasites was inactivated when water temperatures reached 56°C after sunlight exposure. Both solar radiation and heat produced by the sun have a synergistic effect in killing cysts of Giardia duodenalis and Entamoeba histolytica/dispar when temperatures rise above 50°C, with complete death at 56°C, using painted 2-l PET containers. Solar disinfection system using PET containers painted black on one side can be used to disinfect water against Giardia duodenalis and Entamoeba histolytica/dispar using natural sunlight.
doi_str_mv 10.1111/j.1365-2672.2008.04054.x
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identifier ISSN: 1364-5072
ispartof Journal of applied microbiology, 2009-03, Vol.106 (3), p.847-852
issn 1364-5072
1365-2672
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subjects Animals
Biological and medical sciences
Disinfection - methods
drinking water at point-of-use
Entamoeba histolytica
Entamoeba histolytica - radiation effects
Fluorescent Dyes
Fundamental and applied biological sciences. Psychology
Giardia duodenalis
Giardia lamblia - radiation effects
Microbiology
protozoan parasites
solar radiation
Spores, Bacterial - radiation effects
Sunlight
treatment
Water Microbiology
Water Purification - methods
Water Supply
title Impact of solar radiation in disinfecting drinking water contaminated with Giardia duodenalis and Entamoeba histolytica/dispar at a point-of-use water treatment
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