Advanced Operation in Activated Sludge Plant for the Stability Treatment and Reducing Energy by Using of KURISONIC, the Unique Monitoring Means for Sludge Settling Tank

Abstract

KURISONIC™ is the unique sensor, which provides the condition monitoring means in sludge settling tank (SST). This measuring method is ultrasonic, like sonar, the sludge condition can be detected by its echo.
The conventional operation in activated sludge plant is mainly based on DO and BOD load in aeration tank, however, the following two trials have been proceed by using of KURISONIC and obtained good results.
1) High Compaction Sludge Return Control in SST :
-Higher return sludge concentration causes to improve at dehydrator to reduce the cake water content, and to save cake waste cost.
-Smaller volume of return sludge causes to gain HRT in aeration tank, and to improve stability treatment.
2) Excess aeration and Denitrification control from monitoring SST :
-Lower SS effluent from SST causes to improve treated water quality, and to support the performance of plant.
-Suitable aeration causes to save energy, to save electric cost and concerning CO₂ gas discharge to the earth
The operation with focusing to SST by using of KURISONIC is very effective in activated sludge plant.