Composite sludge deep dehydration agent and preparation method and use method thereof

Abstract

The invention discloses a composite sludge deep dehydration agent, and a preparation method and a use method thereof. The composite sludge deep dehydration agent comprises a modifier, the modifier ispowder, the effective content is more than 90%, and the passing rate of the modifier with fineness of 100 meshes is more than 85%; wherein the main component of the modifier is a combination of multiple of magnesium sulfate, magnesium chloride, aluminum sulfate, magnesium oxide, ammonium chloride, sodium gluconate, ferric chloride, ferric sulfate, ammonium sulfate, aluminum chloride, sodium aluminate and sodium pyrosulfate. The method includes steps of: carrying out mechanical dehydration on the sludge to be treated to obtain plastic sludge with the water content of 75-85%; mixing the modifierwith water to prepare a modifier solution, wherein the mass ratio of the modifier to the water is 1:1-1:5; adding the modifier solution into the plastic sludge, wherein the adding amount of the modifier solution is 0.5-2% of the mass of the plastic sludge; and carrying out re-dehydration treatment through high-pressure deep dehydration equipment, so that the water content of the sludge with the water content of 75-85% can be reduced to 45-70%.

Description

technical field [0001] The invention relates to the technical field of sludge treatment of municipal sludge and industrial sludge, in particular to a composite sludge deep dehydration agent and a preparation method and use method thereof. Background technique [0002] With the commissioning and operation of a large number of sewage treatment plants, the sludge output will increase significantly. In the process of sewage biological treatment, the microorganisms come into contact with the organic matter in the sewage, and ingest the biodegraded components in the water to grow and reproduce. In this process The proliferating glue plume-forming bacteria will aggregate and link together with the extracellular polymers secreted by themselves, the remaining suspended solids in the water phase, filamentous bacteria, fungi, protozoa, and divalent calcium and magnesium ions to form a size of several hundred microns The sludge rubber plume has a loose structure, extremely high water co...

AI Technical Summary

Problems solved by technology

[0005] Chinese patent CN104926075A discloses a conditioner for deep dehydration of excess sludge. The conditioner uses rice husk powder as a conditioner for sludge dehydration, which can overcome the current defects that FeCl3 and CaO will corrode incineration equipment, and the reduction of organic matter is not conducive to incineration.

The conditioner of this invention needs cellulose and hemicellulase, and the conditioning time is as high as 240 minutes, the cost is high, and the organic matter content is high, so the problem that the filter cake is easy to compress and deform cannot be avoided