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Method for preparing catalyst and water treatment method for catalyzing ozone oxidization by utilizing catalyst

A technology of ozone oxidation and catalyst, which is applied in the direction of catalyst activation/preparation, oxidized water/sewage treatment, water/sewage treatment, etc. It can solve the problems of sludge occupation, large land, environmental pollution, etc., and reduce project cost and dissolution rate Small, the effect of improving the removal efficiency

Inactive Publication Date: 2011-01-26
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the sludge after sewage treatment occupies a large amount of land and pollutes the environment, and provides a preparation method of a catalyst and a water treatment method using a catalyst to catalyze ozone oxidation

Method used

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  • Method for preparing catalyst and water treatment method for catalyzing ozone oxidization by utilizing catalyst
  • Method for preparing catalyst and water treatment method for catalyzing ozone oxidization by utilizing catalyst
  • Method for preparing catalyst and water treatment method for catalyzing ozone oxidization by utilizing catalyst

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specific Embodiment approach 1

[0021] Specific embodiment 1: The preparation method of the catalyst in this embodiment is as follows: 1. Dry the sludge at 50-150° C. for 0-120 hours, crush it, and sieve it to obtain sludge with a particle size of 1.0-2.0 mm Particles; 2. Put the sludge particles with a particle size of 1.0-2.0 mm into the zinc chloride aqueous solution with a concentration of 0-20 mol / L, let it stand at room temperature for 24 hours, and then pour off the supernatant to obtain granular sludge. 3. Transfer the granular sludge dried at 105°C for 24 hours to the muffle furnace, and raise the temperature in the muffle furnace under the conditions of a nitrogen flow rate of 400mL / min and a heating rate of 0-100°C / min. to 300-1000°C, and maintain the temperature of 300-1000°C for 0-5h to obtain product A; 4. Rinse product A with hydrochloric acid with a molar concentration of 0.1-1mol / L for 3-10 times, and then rinse with deionized water 3-10 times, and then dry the product A at 50-150°C for 0-12...

specific Embodiment approach 2

[0022]Embodiment 2: The difference between this embodiment and Embodiment 1 is that the sludge described in step 1 is the remaining activated sludge in the sewage treatment process. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0023] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the drying temperature in step 1 is 80-120°C. Others are the same as those in the first or second embodiment.

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Abstract

The invention discloses a method for preparing a catalyst and a water treatment method for catalyzing ozone oxidization by utilizing the catalyst and relates to a method for preparing a catalyst and a water treatment method. The invention solves the problem that sludge left after sewage treatment occupies vast land and causes pollution to the environment. The method for preparing the catalyst comprises the following steps of: after drying, pulverizing and screening the sludge, charging the sludge into a zinc chloride aqueous solution; standing and removing supernatant liquor; and after insulating heat of particle sludge in a muffle furnace, rinsing respectively with hydrochloric acid and deionized water and drying to obtain the catalyst. The water treatment method comprises the following step of charging water treated by a flocculating pond, a settling pond and a filter pond or sewage treated by a settling pond I, a biological pond and a settling pond II into a reactor in which ozone and the catalyst are added, for treating. The invention provides the ozonization catalyzing catalyst with the characteristics of low cost, efficient catalysis, less dissolving amount and large specific surface area while the sludge problem is solved. The catalyst of the invention can improve the removal efficiency of ozone on organic pollutants in water.

Description

technical field [0001] The invention relates to a catalyst preparation method and a water treatment method. Background technique [0002] With the deepening of ozone research, it is found that the selectivity of ozone oxidation is very strong, and it has a good effect on the removal of easily oxidized organic substances in water, but the removal efficiency of refractory persistent organic substances in water is low. At present, as an enhanced technology of ozonation alone, ozone catalytic oxidation has been gradually applied to water supply treatment and advanced sewage treatment, which has aroused widespread concern in the industry. Ozone catalytic oxidation technology itself is an advanced oxidation technology, which pursues the generation of more intermediate products with strong oxidizing ability (such as hydroxyl radicals, redox potential 2.8V) under the action of ozone in order to improve the ozone oxidation ability. Because of its strong oxidation ability, non-select...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J37/02C02F9/14C02F1/78C02F1/52C02F3/00C02F1/00C02F101/30
Inventor 马军文刚方兴王静怡
Owner HARBIN INST OF TECH
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