Abstract
This is the third in a series of four articles describing research undertaken at PIRA during 1978–1980 on the causes and prevention of sewage fungus growth in rivers receiving paper and board mill effluents. This paper describes pilot scale trials carried out at two papermills to assess various treatment systems for removal of BOD and effluents were biological filtration through plastic media, activated sludge, multi-media mechanical filtration and hydrogen peroxide addition. Both biological systems proved effective, but mechanical filtration showed no clear benefit. Hydrogen peroxide addition was able to remove a substantial proportion of the free glucose concentration, but verification of the direct effect on sewage fungus growth was impeded by the poor sewage fungus growth generated by the untreated clarified effluent at this time.
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