Fenton-containing sludge catalyst for water treatment, and preparation method and application method thereof

Abstract

The invention discloses a Fenton-containing sludge catalyst for water treatment, and a preparation method and an application method thereof, and belongs to the technical field of water treatment. Thecatalyst comprises a carrier and an active component, the carrier is prepared from clay, micalex, sepiolite, kaolin and quartzite as raw materials, the active component is prepared from Fenton sludgeas a precursor, the Fenton sludge is sludge dried at low temperature, the content of the iron element in the sludge is 60-70%, and the content of organic matters in the sludge is 10-15%; and silicatemineral carriers such as clay, micalex, sepiolite, kaolin and quartzite play a good skeleton supporting role, it is guaranteed that the catalyst has high strength, the substances are not likely to bedissolved in water, and the service life of the catalyst in water is guaranteed. The Fenton sludge contains the catalyst active component, and pores are generated in the roasting process of the catalyst, so that the porosity of the catalyst is ensured, and the contact probability of components in catalyst particles and ozone is increased; and the strength of the prepared catalyst is greater than 400 N, and the service life of the catalyst is prolonged by 2-3 years.

Description

technical field [0001] The invention relates to the technical field of water treatment, more specifically, to a water treatment catalyst containing Fenton's mud and its preparation and application method. Background technique [0002] Under the current increasingly severe environmental protection situation, the sewage treatment industry is facing continuous pressure to improve water quality standards. With the gradual implementation of the national sewage level A standard and the surface-like IV standard in some developed areas, the existing conventional sewage treatment units include biochemical in The domestic treatment technology is gradually unable to meet the advanced treatment requirements of sewage, followed by the increasing popularity of advanced oxidation technology for advanced treatment. Ozone catalytic oxidation technology is one of the advanced oxidation technologies. Its principle is to use catalysts to catalyze ozone to generate hydroxyl radicals (·OH) with s...

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Problems solved by technology

Therefore, in addition to a large amount of iron and a small amount of inorganic salts, Fenton sludge also contains a certain amount of organic impurities. If it is not properly treated, it will not only cause secondary pollution to the environment, but also waste a lot of iron sludge resources.

[0004] The patent publication number is that CN109731575A discloses a kind of Fenton's sludge catalyst of ozone catalytic oxidation nbsCOD and its preparation and application method, wherein the scheme is that the catalyst comprises Fenton's sludge active component and rho-alumina, so The above-mentioned ρ-alumina is the carrier of the catalyst, and the active components of Fenton's sludge are loaded on the ρ-alumina carrier; although the catalyst performance has a good effect after using ρ-alumina as the carrier, it still has some disadvantages. ideal place

However, because alumina is an amphoteric oxide, it is easy to dissolve in water, and the strength of alumina catalyst is generally low (less than 300N). When the water flow is too large, the collision and friction between the catalysts will easily cause the catalyst to break, and the service life of the catalyst is short, which improves the efficiency of the enterprise. Operating costs

Activated carbon has low strength and needs to be protected by an inert atmosphere during the catalyst roasting process. The cost of firing is high, which is not conducive to large-scale engineering applications.

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