Catalytical ozonization catalyst utilizing multi-source sludge to prepare and application thereof

Abstract

The invention discloses a catalytical ozonization catalyst prepared by utilizing multi-source sludge and an application thereof, and establishes a method for preparing a sludge group active carbon catalyst for catalytical ozone oxidation organic industrial waste water. The method comprises the following steps of: utilizing multi-source sludge such as surplus sludge generated by urban sewage factory biochemical treatment and a metal sludge generated by a Fenton oxidation method, preparing a skeleton which is a sludge group active carbon through steps such as organic substance adding, actification, dehydration, drying, mixing, roasting and screening, wherein a surface layer contains a solid catalyst of metallic oxide, and the ratio of the sludge group active carbon and the metallic oxide in parts by weight is 1:(0.3-0.5). The catalyst is used for catalyzing ozone oxidation treatment organic industrial waste water and has higher catalytic activity and stability, the processing range is wide, the realization and popularization and application are easy, and the economic benefits are improved in an organic industrial waste water processing procedure.

Description

technical field [0001] The invention belongs to the technical fields of wastewater treatment technology and environmental functional materials. The invention relates to a method for preparing a sludge-based activated carbon solid catalyst for catalyzing ozonation by using sludge produced by biochemical treatment of urban sewage plants and metal sludge produced by Fenton oxidation. Background technique [0002] The biochemical treatment method of urban sewage plants is to continuously mix and cultivate sewage and various microbial groups under artificial oxygenation conditions to form activated sludge. The biological coagulation, adsorption and oxidation of activated sludge are used to decompose and remove organic pollutants in sewage. Then the sludge and water are separated, most of the sludge is returned to the aeration tank, and the excess is discharged from the activated sludge system. Because of its mature technology, simple procedure and low cost, it has become the mo...

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Problems solved by technology

[0004] The catalytic ozonation method for degrading organic matter in water has been put into practice. According to different catalytic methods, catalytic ozonation can be divided into two methods: one is to use the homogeneous catalytic ozonation of metal ions in the solution, and the intervention of metal ions can accelerate the formation of ozone. Decomposition, strengthening the production of active intermediates such as free radicals to improve the oxidation capacity of ozone, also greatly enhanced the utilization rate of ozone, the disadvantage is that there is a problem that it is difficult to recover metal ions in the water after treatment, the utilization rate of the catalyst is reduced, and it will also cause secondary pollution. Secondary pollution, high operation and maintenance costs; the other is heterogeneous catalytic ozonation using metal oxides supported by solid metal oxides and activated carbon as a catalyst. This method has good catalyst stability, and the metal is not easy to lose Introduce secondary pollution, no subsequent treatment is required, and the catalyst can be regenerated and reused

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