OA2 rotary drum screen is a new type of product developed & produced by BENENV which absorbed foreign advanced technology & combined actual condition of domestic water treatment. It is the fine screen which integrates residue collecting, conveying and dewatering together and been widely used for municipal wastewater treatment plant.The rotary drum screen is composed of cylindrical screen drum, the installation angle is 35. Residues get blocked and stored on the inner surface of screen drum while flowing by. The whole cylindrical drum which is driven by motor, drum surface washed by deslagging brush and rinsing unit. Residue blocked by deslagging plate dropped into the collecting hopper & delivered by central screw conveyor, and finally fell into waste cart from discharge outlet for outward transport.