JIS B 9945:1987 (R2014)

This Japanese Industrial Standard specifies the testing items and testing methods required for grasping the performance in using state of pressure dehydrator, throttling pressure dehydrator and vacuum dehydrator used generally hither to out of equipments to separate the water content in sludge through filter cloth or filter plate by pressure reducing or pressurizing after preliminarily concentrating the sludge generated from process of waste-water treating and, as required, carrying out pretreatment.