Conditioner for sludge dehydration and conditioning method

Abstract

The invention discloses a conditioner for sludge dehydration. Based on the dry weight of the sludge to be treated, the formula of the conditioner contains 10 to 20 percent of iron salt, 10 to 20 percent of burnt lime, 10 to 20 percent of coal gangue and 0.01 to 0.05 percent of potassium permanganate bactericide. The invention also discloses a conditioning method for the conditioner for the sludge dehydration, which comprises the following steps of: adding the potassium permanganate bactericide into the sludge to be treated at normal temperature under normal pressure, treating the sludge for at least 2 minutes with stirring, and then adding the iron salt to react for at least 2 minutes; and then adding the burnt lime to adjust the pH value to be neutral, reacting the mixture for at least 2 minutes, adding the coal gangue to react for at least 2 minutes, and finally performing pressure filtration. The invention has the advantages of low cost, wide raw material source, no toxicity, environmental friendliness, short treatment time, high sludge dehydration degree and the like.

Description

technical field [0001] The invention relates to the field of environmental engineering, in particular to a chemical reagent for sludge treatment and a conditioning method thereof. Background technique [0002] At present, the annual discharge of dry sludge from urban sewage treatment plants in my country is about 1.3 million tons, and it is also increasing at a rate of 10% every year. How to properly dispose of sludge from sewage treatment plants and how to solve a large amount of sewage sludge has become an important issue related to the safety of human ecological environment. [0003] The sludge discharged from the sewage treatment plant contains a large amount of organic matter, heavy metal ions, parasite eggs, pathogenic bacteria, etc., and its moisture content is unstable, generally around 80%. At present, the treatment of sludge mostly adopts simple disposal methods such as discarding and landfilling. This disposal method not only occupies land resources, but also pr...

AI Technical Summary

Problems solved by technology

This disposal method not only occupies land resources, but also produces secondary pollution; very few use dehydration conditioners to treat sludge, and this treatment process can completely settle 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