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2016 ; 16
(ä): 931
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Community challenges when using large plastic bottles for Solar Energy
Disinfection of Water (SODIS)
#MMPMID27596699
Borde P
; Elmusharaf K
; McGuigan KG
; Keogh MB
BMC Public Health
2016[Sep]; 16
(ä): 931
PMID27596699
show ga
BACKGROUND: Communities living in developing countries as well as populations
affected by natural or man-made disasters can be left at great risk from water
related diseases, especially those spread through the faecal-oral route.
Conventional water treatments such as boiling and chlorination can be effective
but may prove costly for impoverished communities. Solar water disinfection
(SODIS) has been shown to be a cheap and effective way for communities to treat
their water. The exposure to sunlight is typically carried out in small volume
plastic beverage bottles (up to 2 l). Given the water requirements of consumption
and basic personal hygiene, this may not always meet the needs of communities.
Recent work has shown 19-L plastic water dispenser containers to be effective
SODIS reactors, comparable in efficacy to PET bottles. In this paper we outline
the need for studying SODIS in large volumes and discuss 4 main associated
challenges. DISCUSSION: Apart from clean water needed for consumption, access to
adequate water is essential for sanitation and hygiene. Contamination of treated
water through unwashed hands or vessels contributes heavily to the spread of
water borne pathogens in communities. Traditional water treatments such as
boiling and chlorination can be effective but may prove financially burdensome
for low income communities. SODIS in large vessels could be used as a simple
method to meet water requirements in low income and disaster affected
populations. However, there have been some concerns associated with the
conventional SODIS method; we identify the main ones to be: (1) cold or cloudy
weather; (2) the fear of leaching in plastic bottles; (3) water turbidity, and;
(4) community acceptance. The application of SODIS in large bottles like WDCs has
the potential to be an efficient and cost effective method of disinfecting water,
either for consumption until more rigorous water treatments can be put in place,
or for sanitation and hygiene to curb the spread of fecal contamination. Further
research is needed that can address some of the limitations and challenges
associated with the use of large bottles for SODIS.