Conditioner and conditioning method for dewatering of domestic sludge

Abstract

The invention discloses a conditioner for dewatering of a domestic sludge, a formula of the conditioner includes a polyacrylamide being 0.3%-0.9% of the sludge to be processed, a bamboo charcoal being 5%-20% of dry weight of the sludge to be processed, a quaternary ammonium salt being 2%-1% of dry weight of the sludge to be processed, a quick lime being 2%-5% of dry weight of the sludge to be processed, and a polymeric aluminum sulfate being 5%-20% of dry weight of the sludge to be processed; and the method comprises the following steps of: at normal temperature and normal pressure, orderly adding the polymeric aluminum sulfate, the quick lime and the bamboo charcoal into the sludge to be processed, stirring the sludge for reaction for at least 5 minutes, further orderly adding the polyacrylamide and the quaternary ammonium salt, stirring the sludge for at least 3 minutes, finally, performing a filter pressing step. The conditioner and the conditioning method for dewatering of the domestic sludge have the advantages of being short in conditioning reaction time, fast in sludge depositing speed, good in dewatering effect and protective for environment without pollution.

Description

technical field [0001] The invention belongs to the field of environmental engineering, and in particular relates to a chemical reagent for sludge dewatering and a conditioning method thereof. Background technique [0002] With the acceleration of my country's economic construction and urban development, domestic sludge production continues to increase. This situation has brought serious pollution to the environment, directly threatening the human living environment and the edible safety of aquatic products. [0003] Sludge contains a large amount of organic matter, heavy metal ions, parasite eggs, pathogenic bacteria, etc., and its moisture content can reach more than 80%, and it is not stable. At present, 90% of the sludge is treated by simple methods such as discarding and burying, which not only takes up valuable land resources, but also produces secondary pollution; very few sludge is treated with dehydration conditioners, This treatment process can completely settle ...

AI Technical Summary

Problems solved by technology

At present, 90% of the sludge is treated by simple methods such as discarding and burying, which not only takes up valuable land resources, but also produces secondary pollution; very few sludge is treated with dehydration conditioners, This treatment process can completely settle the pollutants in a short time

However, the cost of these conditioning agents is very high, it is difficult to degrade in nature or the degraded monomers are toxic to the human body, and the dehydration effect is not ideal