Protective Agent for Ozone Oxidation Catalyst Used in Degradation of Organic Wastewater

Abstract

The invention discloses an ozone oxidation catalyst protective agent for degrading organic wastewater. The protective agent is prepared from 6-10 wt% of composite active components composed of manganese oxide, cobaltous oxide and rare earth oxide, 35-45 wt% of coal ash, 2-5 wt% of carbon active pore-forming agent, 40-50 wt% of kaolin and 1-5 wt% of methylcellulose binder through synthesizing, mulling, balling, drying, screening and firing. The composite active components are synthesized by 75 wt% of MnO2, 20 wt% of CoO and 5 wt% of La2O3 through a co-precipitation method. The ozone oxidation catalyst protective agent is an efficient organic wastewater purifying ozone oxidation protective agent prepared from the composite active components, is suitable for wastewater treatment in petrifaction, chemical engineering, spinning, printing and dyeing, papermaking and the like, not only has good impurity filter-away and supporting functions, but also has an excellent degrading effect and high mineralization capacity, is good in wastewater CODCr removal rate and total organic carbon (TOC) removal rate, and has black contrast increase rate of 15%.

Description

technical field [0001] The invention relates to a catalyst protector for water treatment, in particular to a catalyst protector which can catalyze ozone oxidation and degrade organic waste water, and has the functions of filtering, supporting and promoting catalyst. Background technique [0002] As we all know, in the leather, paper, food, pharmaceutical and other industries, a large amount of high-concentration organic wastewater with a COD of 2000mg / l will be produced, which will cause serious pollution to the environment and seriously damage human health. Therefore, organic wastewater must be treated to meet the standard before it can be discharged or reused. At present, there are many main methods for treating high-concentration organic wastewater. Among them, the use of ozone in water treatment has the characteristics of strong oxidation ability, fast reaction speed, no sludge generation, and no secondary pollution. It is very effective in reducing BOD and COD in water....

AI Technical Summary

Problems solved by technology

At present, ceramic balls and ceramsites are generally used as catalyst protectors to support catalysts and filter organic wastewater, so that catalysts are not easy to pulverize and fluidize. However, the existing ceramic balls or ceramsite protectants only have support and filter adsorption When the organic wastewater passes through the protective agent, the macromolecular organic matter in the wastewater has no time to degrade into small molecular substances and is enriched in the gaps between the accumulated ceramic balls or ceramsite particles, and gradually blocks the gaps , to increase the pressure of the bed in the tower, resulting in an increase in tower running resistance, increased energy consumption, and eventually lead to shutdown

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