Effect of Ultraviolet Radiation on the Disinfection of Microorganisms : Our Knowledge Publishing : 9786207324071 : 6207324072 : 28 Mar 2024 : Treating domestic sewage is one of the most important sanitation measures for people's quality of life. The agricultural use of treated domestic sewage is an alternative for semi-arid regions. The general aim of this study is to analyze the effect of different sludge levels of primary domestic sewage on the inactivation of total and thermotolerant coliforms using ultraviolet radiation from lamps. From August to September 2011, an ultraviolet reactor was installed and monitored in the domestic sewage treatment mini-station at the UFERSA Zoo and Botanical Park in Mossoró-RN. Throughout the experimental period, samples of treated effluent were collected for physical-chemical and microbiological characterization. The experiment was set up in a completely randomized design with three replications and six treatments. The results indicated that there wa