IJESD 2017 Vol.8(1): 6-9 ISSN: 2010-0264
doi: 10.18178/ijesd.2017.8.1.911
doi: 10.18178/ijesd.2017.8.1.911
Effectiveness of UV Disinfection for Contaminated Surface Water
Priyanka Ali, Mohammad Fahad Bin Alam, and Muhammad Ashraf Ali
Abstract—In Bangladesh, surface water (e.g., pond/river
water) and rainwater are important sources of potable water,
particularly in areas suffering from arsenic contamination of
groundwater and high salinity. However, surface water often
suffers from high microbial contamination and needs
disinfection for potable use. Disinfection is a challenge for small
water supply systems, as a family or small communities often do
not have necessary facilities to disinfect water properly. Many
commercially available household-level treatment systems are
not effective in removing pathogens. This study presents an
assessment of the effectiveness of UV disinfection for highly
contaminated surface water. Disinfection experiments were
carried out in a large (152 cm × 48 cm x 48 cm) container under
different operational (e.g., UV lamp intensity, exposure time)
and water quality (e.g., initial FC, turbidity) conditions. UV
disinfection could significantly reduce microbial (FC)
contamination from highly polluted surface water with initial
FC concentration varying from 8,000 to 24,000 cfu/100 ml. The
effectiveness of UV disinfection has been found to depend on a
number of operational factors including intensity of lamp,
exposure time, and distance from the lamp. Although FC
concentration could not be reduced to zero (which is the national
drinking water standard) under the experimental condition used
in this study, the results suggest that this could be achieved with
appropriate combination of lamp intensity, exposure time and
tank dimension. Thus, UV disinfection could potentially be used
for treatment of surface (pond/river) water in water scarce areas
(e.g., arsenic-affected or salinity-prone areas).
Index Terms—Disinfection efficiency, fecal coliform, lamp intensity, UV disinfection.
Priyanka Ali, Mohammad Fahad Bin Alam, and Muhammad Ashraf Ali are with the Department of Civil Engineering, Bangladesh University of Engineering and Technology (BUET), Dhaka 1000, Bangladesh (e-mail: ashraf@ce.buet.ac.bd, mashrafali88@gmail.com).
Index Terms—Disinfection efficiency, fecal coliform, lamp intensity, UV disinfection.
Priyanka Ali, Mohammad Fahad Bin Alam, and Muhammad Ashraf Ali are with the Department of Civil Engineering, Bangladesh University of Engineering and Technology (BUET), Dhaka 1000, Bangladesh (e-mail: ashraf@ce.buet.ac.bd, mashrafali88@gmail.com).
Cite: Priyanka Ali, Mohammad Fahad Bin Alam, and Muhammad Ashraf Ali, "Effectiveness of UV Disinfection for Contaminated Surface Water," International Journal of Environmental Science and Development vol. 8, no. 1, pp. 6-9, 2017.
General Information
- ISSN: 2010-0264 (Print); 2972-3698 (Online)
- Abbreviated Title: Int. J. Environ. Sci. Dev.
- Frequency: Bimonthly
- DOI: 10.18178/IJESD
- Editor-in-Chief: Prof. Richard Haynes
- Managing Editor: Ms. Cherry L. Chen
- Indexing: Scopus (CiteScore 2022: 1.4), Google Scholar, CNKI, ProQuest, EBSCO, etc.
- E-mail: ijesd@ejournal.net
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