| one-year survey of enteroviruses, adenoviruses, and reoviruses isolated from effluent at an activated-sludge purification plant. | samples of raw sewage, primary effluent, and secondary effluent from a large activated-sludge purification plant near melbourne (victoria, australia) were collected every second week for 1 year. viruses were detected in all secondary effluent samples and in six of seven samples obtained after final chlorination. adenoviruses (85% reduction) and reoviruses (28% reduction) were removed less efficiently by this treatment process than were enteroviruses (93% reduction). in addition, 57 of 171 sample ... | 1981 | 6261687 |