Studies of Anaerobic Treatment of Sulfite Process Wastes

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Abstract
A series of laboratory studies of treatment of sulfite process wastes constitute a case study of application of high rate anaerobic biological treatment. Sulfite evaporator condensate (SEC) was evaluated in batch and continuous flow studies to find the efficiency of treatment that was possible and the conditions suitable for treatment. The role of sulfur and neutralization in the process were especially significant. Caustic extraction stage bleaching wastes (CE) were also studied for their use in neutralizing the evaporator condensate. Toxicity effects requiring dilution were found, but both CE and SEC can be treated, removing most of the BOD in a high rate process at detention times believed suitable for commercial application.

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