Advances in Resources and Environmental Science

In this paper, the combination process of high efficiency clarification and snail dewatering is used to treat the sludge discharge water of waterworks. During the trial operation of the process, the water content of sludge discharge is less than 80% of the design target, and the causes are investigated and analyzed, and a series of improvement measures are made. The results showed that a series of measures, such as extending the mixing time of the front-end sludge discharge water, changing the customized spiral shaft, adjusting the gap between the ring pieces of the enrichment section, choosing the PAM with good matching degree, adjusting the gap between the mud discharge plate, reducing the operation frequency of the screw stack machine, increasing the dosage, etc. could reduce the water content of the sludge discharge water treatment and make the sludge water content reach the standard stably. It is proved that this study has strong popularization value in the application of sludge discharge water treatment in waterworks.

water works; sludge water; water content of sludge; improvement measures