A METHOD FOR TREATMENT OF WASTE WATER IN AN ACTIVATED SLUDGE PLANT

摘要

The present invention provides a method for treatment of waste water in an activated sludge plant. The plant comprises a plurality of process tanks comprising activated sludge with a treatment rate being variable. Each process tank has an inlet for receiving waste water and an outlet for supplying treated water to at least one clarification tank for separation into a water fraction and a sludge fraction. The method comprises the steps of: determining an actual spare capacity indicating an amount of waste water which can be added and treated in the activated sludge plant, supplying waste water only to a first group of process tanks, the first group of process tanks being a subset of the plurality of process tanks, wherein the number of process tanks in the first group is determined based on the actual spare capacity, and automatically interrupting supply to a second group of process tanks based on the actual spare capacity.