METHOD FOR DEWATERING BIOLOGICALLY ACTIVATED SLUDGE AND FILTERING OF A WASTE WATER INFLUENT, AND DEVICE AND SYSTEM FOR PERFORMING SUCH METHOD

摘要

The present invention relates to a method for dewatering activated sludge and filtering of a waste water influent, and filter belt device and system therefore. The method comprises the steps of: - supplying the influent to a filter belt device and filtering the influent with a filter be - providing a filter mat of accumulated solid particles from the influent on the belt of the filter belt device; - supplying the filtered influent to a sludge reactor; and - collecting activated aerobic sludge with a dry solids content in the range of 0.04- 0.8% and providing the activated sludge to the filter mat. In a preferred embodiment the method further comprises the step of supplying flocculants to the collected activated sludge.