The scum is transported to a specially made dustbinthrough the hopper chute and the belt transportation. The project is not only efficient for scum removing, but also is simple in management and low in investment. The scum is dewatered through gravity sedimentation in the dustbinbefore the final dispisal outside of the WWTP. The scum treatment system may provide a reference for the reconstruction of old WWTPs and the design of new WWTPs.The reconstruction cost using this system is more than 200 000 yuan less than that using the original treatment system.
The dustbinconventional method using pump transportation followed by mechanical dewatering is high in investment and cannot treat the scum effectively. Renovation of Scum Treatment System in Aerated Grit Chamber of Wastewater Treatment Plant WU Peng-kun, YU Peng-xue, AN Hong-jin, LIU Hao Abstract:The scum from the aerated grit chamber has the characteristics of large volume, high solid content, thick and many fibers. It is a common problem being faced by many wastewater treatment plants （WWTPs）. Based on the characteristics of the scum, the scum treatment system is renovated in a WWTP of Qingdao. A stainless steelhopper chute is installed with a 45° angle in the scum pit.
