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Despite the treatment processes that a typical wastewater is subjected to, microorganisms present in the wastewater are not effectively removed. These pathogenic organisms play important roles in the spread of waterborne diseases. Important treatment process employed to destroy or inactivate these pathogenic microorganisms is called disinfection. Disinfection is an important application under chemical treatment process ofwastewater, which includes the use of chemical agents, such as compounds of chlorine, and/or nonchemical agents, such as heat, UV light, radiation, and mechanical means.