Desliming wastewater treatment process

Abstract

The invention discloses a desliming wastewater treatment process. The desliming wastewater comprises filtered water obtained during excess sludge dewatering and wastewater obtained after filter cloth of a desliming machine is washed. The method comprises the following steps: fully and uniformly mixing filtered water obtained during residual sludge dewatering and wastewater obtained after washing filter cloth of a desliming machine to obtain mixed water, and pumping the mixed water into a sludge storage tank. As a certain amount of flocculating agent is added into the excess sludge before the excess sludge is deslimed on the desliming machine, the desliming wastewater comprises the flocculating agent contained in the filtered water obtained during dewatering of the excess sludge and the wastewater obtained after flushing of the filter cloth of the desliming machine, and the mixed water is directly pumped into the sludge storage tank, so that the precipitation of the sludge in the sludge storage tank can be accelerated, the water content of the residual sludge pumped into the desliming machine from the sludge storage tank is lower, rapid dewatering is facilitated, meanwhile, cyclic utilization of the flocculating agent can be guaranteed as much as possible, waste is reduced, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of sewage treatment equipment, in particular to a desliming wastewater treatment equipment. Background technique [0002] In the field of sewage treatment, sewage treatment generally goes through the following stages: after the sewage enters the sewage treatment plant, the sewage is first filtered through the coarse grid to remove large impurities; then the sewage is filtered through the fine grid to remove the sewage Medium and small pieces of impurities; then the filtered sewage is sequentially processed through the grit chamber, biochemical pool, high-density pool and disinfection pool for corresponding treatment, and finally the sewage is discharged into the water body. Among them, the high-density pool mainly includes the water inlet area, the mixed reaction area, the preliminary sedimentation area and the inclined tube sedimentation area, and the solid sediment in the sewage in the initial sedimentatio...

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Problems solved by technology

[0003] After the sewage is treated with activated sludge in the biochemical tank, it enters the high-density tank, and the remaining sludge in the biochemical tank is pumped into the sludge storage tank through the sludge pump, first for sedimentation, and then pumped into the desilter room through the sludge pump. Carry out dehydration treatment by deslimer, in the prior art, the filter water that deslimer comes out and the water that flushes filter cloth are directly pumped in the coarse grid well, and this mode has following deficiency: 1. Due to the water inflow of sewage treatment plant Sampling is done at the coarse screen, and after pumping the filtered water from the desilter and the water for washing the filter cloth of the desilter directly into the coarse screen well, the sampling result cannot represent the quality of the influent water, making the sampling inaccurate. Accurate; 2. Since the filtered water from the desilter and the water for washing the filter cloth of the desilter are directly pumped into the coarse grid well, the quality of the influent water will be directly changed, which will affect the subsequent treatment process of the sewage

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