Production process for controlling generation of ozonized bromate

A technology for ozonating bromate and production process, which is applied in the field of water treatment, can solve the problems of low bromate generation efficiency, achieve low cost, improve treatment effect, and reduce concentration

Inactive Publication Date: 2016-01-13
SHANDONG JIANZHU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] In order to overcome the low defect that prior art inhibits the generation efficiency of bromate, the object of the invention is to provide a kind of technology that can effectively control the generation of bromate in the ozonation process of water containing higher concentration ammonia nitrogen and bromide ion simultaneously, to solve Problems raised in the background art above

Method used

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  • Production process for controlling generation of ozonized bromate
  • Production process for controlling generation of ozonized bromate
  • Production process for controlling generation of ozonized bromate

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Experimental program
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Embodiment approach 1

[0026] After the water sample is first passed through the aerobic biofilm reactor to remove ammonia nitrogen, the bromide ion concentration in the water is 0.44mg / L, the DOC is 7.03mg / L, and the pH is 8.37. Take 3L of the water sample and put it into a 5L plastic bucket with a stirrer , add sodium hypochlorite to make the concentration of hypochlorous acid in the reactor 0.5mg / L, stir and react for 5min, then add ammonium chloride to make the concentration of ammonia nitrogen 0.7mg / L, stir and react for 1min, then add the water sample to the glass for ozone reaction In the device (the ozone reactor is cylindrical, with an inner diameter of 50mm, a height of 2m, and a microporous titanium plate aeration head at the bottom), the ozone gas generated by the ozone generator is sent to the ozone reactor through the microporous titanium plate aeration head. Water sample dosing, ozone dosing time is 20min, ozone dosing amount is 18mg / L.

Embodiment approach 2

[0040]Adopt 5 kinds of water samples of different water quality, observe the adaptability of this method to water quality, test method is the same as embodiment 1. Each water sample was first passed through an aerobic biofilm reactor to remove ammonia nitrogen, and the concentration of bromate produced by a separate ozone oxidation process and the bromate produced by a chlorination / bromination / ozonation process were respectively, as shown in Figure 6 .

[0041] The water quality of the five water samples is different. After the ammonia nitrogen is removed by the aerobic biofilm reactor, each water sample is added with a concentration of 0.7 mg / L of HOCl and a concentration of 0.6 mg / L of ammonia nitrogen, and then the bromine produced by ozone is added. Salt concentration (ozone dosage 18mg / L, ozone oxidation reaction time 15min);

[0042] It can be seen that the 5 kinds of water samples with different water quality were firstly treated by aerobic biofilm reactor to remove a...

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Abstract

The invention discloses a production process for controlling generation of ozonized bromate. A biological film reactor is used for removing ammonia nitrogen in water before ozone is in contact with a pool, sodium hypochlorite is added to water for reacting, bromide ions in water are oxidized into hypobromous acid through hypochlorous acid, then ammonium chloride is added to water, hypobromous acid and the ammonium ions react to generate ammonium bromide, most of bromide ions in water are converted into ammonium bromide to reduce the concentration of the bromide ions in water, ozone is added to water to react with water, and due to the fact that the concentration of the bromide ions is low, the generation amount of bromate is effectively restrained in the ozonization process. The process is simple, operation is convenient, generation of bromate can be effectively controlled in practical engineering production, and therefore the concentration of bromate in water is reduced.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a production process for controlling the formation of ozonated bromate during the ozonation treatment process of water source water containing relatively high concentrations of ammonia nitrogen and bromide ions. Background technique [0002] The ozone oxidation process can effectively remove organic pollutants in water and is widely used in water treatment, but when the water contains bromide ions, it will be oxidized by ozone or hydroxyl radicals to generate bromate. The World Health Organization stipulates that BrO 3 - As a Class 2B carcinogen, the U.S. Environmental Protection Agency (USEPA) stipulates that BrO 3 - The maximum pollution level (MCL) of BrO in drinking water is 10μg / L, and my country's "Drinking Water Hygienic Standard" (GB5749-2006) clearly requires that BrO in drinking water 3 - The content shall not be higher than 10μg / L. [0003] At present, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/12
Inventor 刘建广张春阳涂宗辉
Owner SHANDONG JIANZHU UNIV
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