Sludge dewatering tempering agent and method for sludge dewatering by utilizing same

Abstract

The invention discloses a sludge dewatering tempering agent and a method for sludge dewatering by utilizing the same. The sludge dewatering tempering agent disclosed by the invention contains the following components in parts by weight: 0.2-8 parts of polyacrylamide, 5-35 parts of inorganic polymeric flocculants, 30-80 parts of coal ash and 5-30 parts of surfactants. The method comprises the steps of feeding the sludge dewatering tempering agent disclosed by the invention into a secondary sedimentation tank, and stirring and coagulating, directly carrying out centrifugal treatment on sludge flowing into a concentrating tank from the secondary sedimentation tank. The sludge dewatering tempering agent disclosed by the invention has the advantages that the flocculation capacity and the seepage force are strong, the sludge tempering effect is good, the moisture content of the sludge after tempering is low, the quantity reduction treatment of the sludge is realized, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment, and in particular relates to a sludge dehydration conditioning agent and a sludge dehydration method. Background technique [0002] The water content of sludge produced in sewage treatment plants is generally very high, so sludge dehydration is required to achieve reduction treatment, and the fluid sludge (with or without concentration) is converted into solid wet sludge. Conditioner for sludge dehydration and conditioning. The conditioning agents currently used in the sludge dewatering industry in my country can be roughly divided into two categories, one is inorganic conditioning agents, such as iron salts, aluminum salts, and polymer agents, and the other is organic conditioning agents , such as polyacrylamide conditioner. Most domestic sewage treatment plants use polyacrylamide or lime as sludge conditioning agent. The activated sludge discharged from the secondary settling tank is ...

AI Technical Summary

Problems solved by technology

Most domestic sewage treatment plants use polyacrylamide or lime as sludge conditioning agent. The activated sludge discharged from the secondary settling tank is concentrated and then conditioned, and the conditioned activated sludge is directly sent to the centrifuge equipment for further processing. Dewatering operation, the moisture content of mud cake is more than 80%, which cannot achieve the ideal effect of sludge dewatering, and the concentration time is longer, and the conditioning cost is higher