A process consisting of ultraviolet radiation followed by sedimentation was used to remove suspended solids from a wastewater lagoon effluent. An average of 33 percent of the suspended solids, 45 percent of the volatile suspended solids, and 54 percent of the BOD5 were removed by this process. The process also produced a microbiologically acceptable effluent by removing 66 percent of the total coliform organisms, 78 percent of the fecal coliforms and 49 percent of the fecal streptococci organisms.

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