Author(s): Abayomi Olusegun Adeniyi; Modupe Jimoh

Linked Author(s):

Keywords: Microorganisms; Disinfection; Water treatment; Ultraviolet radiation

Abstract: Microorganisms in water are known to be causes of deadly diseases and have become the breeding grounds for other creatures that act like carriers. The common pathogens in water include Campylobacter Jejuni, Escherichia coliform bacteria, Giardia Lamblia parasite, Hepatitis A virus, Legionella pneumophila bacteria and Salmonella bacterium. Ultraviolet radiation (UVR) is electromagnetic radiation between X-rays and visible light with UV wavelengths ranging from 100 to 400 nanometers and divided into four groups, namely UVA – 315-400 nm; UVB – 280-315 nm; UVC – 200-280 nm; Vacuum UV – 100-200 nm. UVC range is considered the strongest UV radiation due to its high disinfection efficiency against bacteria and viruses. The germicidal effect of ultraviolet light radiation is based on photon absorption by microorganisms' DNA and RNA molecules. Results showed that the microbial content of Agodi gardens river and Akobo well water samples reduced by 57.143% and 50%, respectively, while E. coli reduction also improved by 83.33% and 62.5% in the Akobo well and UCH borehole water samples, respectively, depicting significant improvements in the quality of water. This further implies that the ultraviolet radiation water treatment technology, if properly annexed, can be optimally integrated into water treatment systems globally because of its high and quick disinfection efficiency, environmental safety, resistance to corrosion, ease of operation and low-level hazard to users.

DOI: https://doi.org/10.3850/978-90-833476-1-5_iahr40wc-p1777-cd

Year: 2023