Method for preparing compound air purifying agent from secondary settling tank sludge of urban domestic sewage treatment plant

Abstract

The invention discloses a method for preparing a compound air purifying agent from secondary settling tank sludge of an urban domestic sewage treatment plant, and belongs to the field of preparation of air purifying agents. The method comprises the steps that urban sludge is taken, pH is adjusted, a hydrogen peroxide solution and catalase are added and mixed, water-bath heating is conducted after ultrasonic oscillating is conducted, sealing protection is conducted, and then vacuum filtration is conducted when a mixture is hot; filtered matter is air-dried, pH is adjusted, stirring mixing is conducted on the treated filtered matter and substances such as peptone, ferric sulfate and carboxymethylcellulose, the obtained mixture is poured into a bamboo pole, the two ends of the bamboo pole are sealed, standing is conducted, air-drying is conducted, the mixture is extruded into blocks, calcined, cooled and ground into particles, one half of the particles are put into the bamboo pole, a mixture prepared from substances such as alocasia macrorrhiza and epipremnum aureum, the other half of the particles is added into the bamboo pole, water is added, sealing is conducted, a power supply is switched on, baking is conducted through mild fire, a product is taken out and ground into particles, and the air purifying agent is obtained. The method for preparing the compound air purifying agent from the secondary settling tank sludge of the urban domestic sewage treatment plant has the advantages that the sludge is fully utilized for preparing the air purifying agent, pollution of the sludge to the environment is solved, sustainable utilization of resources is achieved, and the product is safe and environmentally friendly.

Description

technical field [0001] The invention relates to a method for preparing a compound air purifier by utilizing the sludge in a secondary sedimentation tank of an urban domestic sewage treatment plant, and belongs to the field of air purifier preparation. Background technique [0002] Sludge is an inevitable product of sewage treatment plants and sewage treatment. It is estimated that the amount of sludge produced in my country is 3 million tons per year, and the annual growth rate is greater than 10%. If all domestic urban sewage is treated, the dry weight of sludge will be about 8.4 million tons per year, accounting for about 10% of my country's solid waste. Even in several cities and regions with a high level of urbanization in my country, the problem of sludge treatment is already very prominent. Sludge that has not been properly treated and disposed of enters the environment, directly causing secondary pollution to water bodies and the atmosphere, which not only reduces the...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: for the accumulation, incineration and landfill treatment of urban sludge, the operating cost is high and a large amount of land resources are occupied, resulting in low safety performance and poor controllability of sludge treatment, and the disadvantages of easily causing secondary pollution to the environment , provides a kind of method that utilizes the secondary settling tank sludge of urban domestic sewage treatment plant to prepare compound air purifier, the present invention is to take urban sludge to adjust pH, mix with hydrogen peroxide solution and catalase, water bath after ultrasonic