Method for treating sludge by ultrasonic high-temperature treatment and corn straw adding

Abstract

The invention discloses a method for treating sludge by ultrasonic high-temperature treatment and corn straw adding. The method has the advantages that the urban sludge is compositely treated by the ultrasonic waves, high temperature and expanded corn straw powder, the operation is favorable for industrialized control, the chemical reagent is not used in the whole process, the treated sludge does not contain any chemical component, the safety and non-toxicity effects are realized, the use range of sludge is widened, the sludge can be used for preparing fertilizer, and also manufacturing feed and feed additive and preparing an earthworm culture medium, and the injury to a human body via the food chain circulating is avoided; the wastes of corn straw and the like are utilized, the low-carbon and environment-friendly effects are realized, in comparison with other straw, the content of fiber is higher in the corn straw, and the content of lignin is lower, the corn straw is more suitable for preparing the expanded adsorbing structure, the filtering and dewatering property of the sludge can be obviously improved, the sludge is favorably recycled, and the good economic benefit is realized.

Description

technical field [0001] The invention relates to the technical field of urban sludge treatment, in particular to a method for treating sludge with ultrasonic high-temperature treatment in conjunction with the addition of corn stalks. Background technique [0002] With the acceleration of urbanization in my country, the rate of urban sewage treatment has increased year by year, and the sludge output of urban sewage treatment plants has also increased sharply. A large amount of sludge has no stable and reasonable disposal outlet, occupying people's already tense living space. After the sludge without proper treatment and disposal enters the environment, it directly brings secondary pollution to the water body and the atmosphere, which not only reduces the effective treatment capacity of the sewage treatment system, but also poses a serious threat to the ecological environment and human activities. [0003] Municipal sludge is a solid waste generated in the process of urban domes...

AI Technical Summary

Problems solved by technology

[0002] With the acceleration of my country's urbanization process, the rate of urban sewage treatment has increased year by year, and the sludge output of urban sewage treatment plants has also increased sharply. A large amount of sludge has invaded people's already tense living space because there is no stable and reasonable way out for disposal. After the sludge without proper treatment and disposal enters the environment, it directly brings secondary pollution to the water body and the atmosphere, which not only reduces the effective treatment capacity of the sewage treatment system, but also poses a serious threat to the ecological environment and human activities.

[0003] Municipal sludge is solid waste produced in the process of urban domestic sewage treatment. The main characteristics of municipal sludge are high content of organic matter, high content of nitrogen, phosphorus and potassium, and a certain amount of heavy metals with fine particle size, low density, high moisture content and It is not easy to dehydrate, and cannot meet the technical requirements for the water content of sludge resource utilization, which hinders the industrial implementation of sludge resource utilization

In the prior art, the most common treatment method for excess sludge is compost stabilization treatment, which is used as fertilizer for forest land, flowers, nurseries, etc. After certain treatment, using it as fertilizer will also cause certain harm to the soil, and it will still cause harm to the human body through the influence of the food chain.

Filtration and dehydration of municipal sludge is also an important step in municipal sludge conditioning. The dehydration and filtration efficiency affects the reuse of municipal sludge. The traditional traditional sludge conditioning methods mainly include chemical conditioning, which is simple to operate, stable in effect and widely used. However, when used alone, there are also certain limitations, such as large dosage, unsatisfactory effect, and relatively high price. High molecular polymers such as flocculants are often added, and a large amount of addition will cause sludge recycling to be limited. It is necessary to add new non-toxic ingredients, and because urban sludge is rich in organic matter, appropriate combination of treatment methods can be used to open up a new way to deal with urban sludge, and to obtain a harmless and income-generating sludge treatment method