The Method of Curing Activated Sludge Treatment Process during Shutdown

Abstract

As one of the characteristics in the pulp and paper waste water treatment, we can point out that there are long no-load running terms due to“Shutdown”once or twice a year. Long no-load running terms put load-fluctuation stress on the activated sludge treatment process : main process of the pulp and paper waste water treatment, and cause deterioration of performance or degradation in the quality of activated sludge flocs, and may result in various troubles at the restart after Shutdown.
Expressly after the Lehman Shock, during the large-scale equipment work or adjusting the production, it tends to extend the term of Shutdown. Even the wastewater treatment facilities have actualized a trouble which have not been a problem before, when the restart after the shutdown. Therefore, it has become more important to support during the shutdown.
Mushugen Industries Co., Ltd. have cultivated the technique of curing activated sludge treatment in other industries, and we have promoted the application in the field of pulp and paper wastewater treatment.
In this paper, we describe an overview of the knowledge or results acquired by experience in it.