Method for removing water ammonia nitrogen by ozone catalytic oxidation intensification

A technology of ozone catalytic oxidation and water removal, applied in the direction of oxidized water/sewage treatment, etc., can solve the problems of high temperature and high pressure, secondary pollution application scope and so on

Inactive Publication Date: 2007-09-26
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems that existing ammonia nitrogen wastewater treatment methods require high temperature and high pressure in the tr...

Method used

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specific Embodiment approach 1

[0004] Specific Embodiment 1: In this embodiment, the method for strengthening the removal of ammonia nitrogen in water by ozone catalytic oxidation is realized through the following steps: 1. Put a catalyst with a particle size of 1 nm to 10 cm in the reactor in the form of a fluidized bed or a fixed bed In the ozone catalytic oxidation contact reactor, the catalysts are arranged in 1 to 5 layers and the total thickness of the catalysts is controlled at 10 to 500 cm; 2. The wastewater containing ammonia nitrogen is flowed in a forward and reverse flow at a water flow rate of 1 to 50 m / h At this time, in the reactor, titanium plate microporous aerators, standpipe aerators, or the method of uniform air intake around the periphery are used to distribute ozone. The input amount of ozone depends on the water quality. Dosing in actual conditions, in theory, 4 moles of ozone is required for every mole of ammonia nitrogen oxidized, and the actual amount added is 1 to 10 times of the t...

specific Embodiment approach 2

[0005] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the catalyst in step 1 is zeolite or modified zeolite. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0006] Specific embodiment three: the difference between this embodiment and specific embodiment one is that the catalyst is attached with titanium, iron, manganese, copper, cobalt, zinc, platinum, palladium, rhodium, ruthenium, molybdenum, silver, gold, The zeolite or modified zeolite of one or more components of vanadium, tungsten or nickel, when there are multiple components attached, the components are in any ratio. Other steps are the same as in the first embodiment.

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Abstract

The invention discloses a removing method of ammonia nitrogen from water through ozone catalytic oxidation, which comprises the following steps: one, arranging activator in reactor; two, proceeding ozone disperse-gas in the reactor; three, controlling contacted time of ozone and waste water and activator and waste water with full of ozone; leading the disposing water out of reactor; getting yielding water. This invention can either dispose high concentrate ammonia nitrogen waste water, or low concentrate ammonia nitrogen waste water, and non-cause twice pollution.

Description

technical field [0001] The invention relates to a method for removing ammonia nitrogen in water. Background technique [0002] Ammonia nitrogen in water mainly comes from the discharge of ammonia nitrogen wastewater from industrial sectors, daily sewage, landfill leachate, animal excrement, wastewater from meat processing and breeding industries; in addition, the large-scale use of chemical fertilizers in agriculture can also cause ammonia nitrogen pollution. Widespread pollution. Ammonia nitrogen in water bodies will cause eutrophication of lakes and rivers, reduce dissolved oxygen concentration, and cause toxicity to fish in water bodies; at the same time, ammonia nitrogen will also corrode and block pipes and water equipment. Many countries have strict restrictions on the concentration of ammonia nitrogen in drinking water. According to the Class I water quality standard of the Ministry of Construction of my country in 2002, the allowable concentration of ammonia nitroge...

Claims

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Application Information

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IPC IPC(8): C02F1/78
Inventor 马军王胜军杨忆新
Owner HARBIN INST OF TECH
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