Abstract
The rotating membrane separator was operated to thicken the sludge from water treatment plant and its performance was examined through about 1 year experiment by the pilot scale. The target concentration of thickened sludge was set on 4%. The rotating membrane separator could thicken the sludge to the target concentration very stable, and be operated with a water flux of 0.6m/d for 3 months without any chemical membrane cleaning. It was found that the interval of chemical membrane cleaning was related with integrated filtrated water volume; therefore a water flux could be designed as the frequency of chemical cleaning.
