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Catalytic ozonation catalyst and method of using same for treating biochemical waste gas

A technology of ozone catalytic oxidation and catalyst, which is applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc. Complexity and other problems, to achieve the effect of simple and easy operation, realization of recycling, and high degree of technical integration

Pending Publication Date: 2019-05-03
WANHUA CHEM GRP CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Biochemical treatment of wastewater is one of the main means of wastewater treatment at present, but the waste gas generated in the current biochemical treatment process seriously affects the environment and human health due to stench. Biochemical waste gas mainly comes from wastewater volatilization and aeration. Biochemical waste gas mainly The components are aromatic hydrocarbon organic matter, ammonia, hydrogen sulfide, trimethylamine, methyl mercaptan and methyl sulfide, and the biochemical waste gas has the characteristics of large gas volume, heavy odor, strong irritation and high toxicity, which is harmful to the ecological environment and human body. health has had a huge impact
[0003] The conventional treatment methods for biochemical waste gas mainly include incineration, alkali washing spray, pickling spray, adsorption material adsorption, and biological filter. Spraying with pickling will produce a large amount of waste alkali and waste acid, resulting in secondary pollution; the adsorption material needs to be regenerated or replaced regularly due to its limited adsorption capacity; the biological filter has poor impact resistance and limited processing capacity
[0004] Invention patent CN 104132352A discloses a biochemical waste gas incineration treatment method. However, due to the low calorific value of biochemical waste gas, fuel heating is required, and the operating cost of incineration treatment is high. At the same time, desulfurization and denitrification units need to be added for sulfur-containing and nitrogen-containing waste gas. The process flow complex
[0005] Invention patent CN 101850213A discloses a method for treating waste gas with a biological trickling filter bed, but its start-up period is long, the anti-fluctuation ability is poor, the treatment effect is unstable, and the treatment is prone to unqualified conditions
[0006] Utility model patent CN 202683055U discloses a method for ozone oxidation treatment of waste gas, which uses water for spraying at the same time, but the efficiency of ozone oxidation alone is not high, and cannot meet the standard of odorless discharge
[0008] The choice of carrier directly affects the treatment efficiency of catalytic oxidation. At present, the carrier of ozone catalytic oxidation mainly includes activated carbon, bentonite, attapulgite, Al 2 o 3 , ceramics and silica gel, etc., but its treatment effect is limited

Method used

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  • Catalytic ozonation catalyst and method of using same for treating biochemical waste gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Example 1: Preparation of plasma modified struvite and dried sludge

[0055] Take 20g of struvite and dried sludge mixed at a ratio of 1:1 and place it in 200mL of pure water, then slowly pour it into the plasma reactor, vacuumize the reactor, and then turn on the power to discharge. The voltage is 16kV, and the discharge frequency is 100Hz. After reacting for 10 minutes, the struvite and dried sludge mixture was taken out, rinsed with pure water and then dried to obtain plasma-modified struvite and dried sludge.

Embodiment 2

[0056] Embodiment 2: the preparation of 0# catalyst

[0057] Take 20g of struvite and dried sludge mixed at a ratio of 1:1 and place it in a dipping bottle for vacuum pretreatment. The vacuum pretreatment time is 20min and the vacuum degree is 96.0KPa; Cobalt nitrate aqueous solution 6.0mL, nickel nitrate aqueous solution 2.7mL containing nickel 0.15g / mL, manganese nitrate aqueous solution 3.0mL, cerium nitrate aqueous solution 2.7mL containing cerium 0.15g / mL, neodymium 0.10g / mL Add 2.0 mL of neodymium nitrate aqueous solution to 10 wt % ethanol aqueous solution to prepare an impregnating solution with a total volume of 16.4 mL. Add the above impregnation solution into the vacuum impregnation bottle with the above struvite and dried sludge carrier and mix evenly, impregnate the above struvite and dried sludge carrier with equal volume, after immersion for 60min, take it out and put it in the oven Dry at 120°C for 3 hours, and then bake at 500°C for 3 hours in a muffle furnac...

Embodiment 3

[0059] Embodiment 3: the preparation of 1# catalyst

[0060] Take struvite and dried sludge 20g after plasma modification in Example 1 and place them in a dipping bottle for vacuum pretreatment. The vacuum pretreatment time is 20min, and the vacuum degree is 96.0Kpa; Cobalt nitrate aqueous solution 6.0mL, nickel nitrate aqueous solution 2.7mL containing nickel 0.15g / mL, manganese nitrate aqueous solution 3.0mL, cerium nitrate aqueous solution 2.7mL containing cerium 0.15g / mL, neodymium 0.10g Add 2.0mL of neodymium nitrate aqueous solution per mL to the ethanol aqueous solution with an ethanol concentration of 10wt%, to prepare an impregnation solution with a total volume of 16.4mL. Add the above impregnation solution into the vacuum impregnation bottle with the above struvite and dried sludge carrier and mix evenly, impregnate the above struvite and dried sludge carrier with equal volume, after immersion for 60min, take it out and put it in the oven It was dried at 120°C for ...

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Abstract

The invention discloses a catalytic ozonation catalyst and a method of using same for treating biochemical waste gas, wherein the carrier of the catalyst is a mixture of struvite and dried sludge, preferably a mixture of plasma-modified struvite and dried sludge, and more preferably, a mixture of yttrium- and plasma-modified struvite and dried sludge, the struvite and dried sludge being sourced from byproducts of wastewater treatment. The catalyst has good adsorption effect on harmful substances in the waste gas. The waste gas is treated with ozone and then is washed in water, so that the waste gas is treated to odorless for discharge, thus preventing ozone pollution.

Description

technical field [0001] The invention relates to the technical field of chemical engineering and environmental engineering waste gas treatment, and more specifically relates to a biochemical waste gas treatment catalyst and a treatment method for waste gas. Background technique [0002] Biochemical treatment of wastewater is one of the main means of wastewater treatment at present, but the waste gas generated in the current biochemical treatment process seriously affects the environment and human health due to stench. Biochemical waste gas mainly comes from wastewater volatilization and aeration. Biochemical waste gas mainly The components are aromatic hydrocarbon organic matter, ammonia, hydrogen sulfide, trimethylamine, methyl mercaptan and methyl sulfide, and the biochemical waste gas has the characteristics of large gas volume, heavy odor, strong irritation and high toxicity, which is harmful to the ecological environment and human body. Health has had a huge impact. [...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J37/02B01J37/34B01D53/90
Inventor 范珍龙段美荣王俊俊曾凡雪姜晓锋张宏科华卫琦
Owner WANHUA CHEM GRP CO LTD
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