CN102120639A - Water treatment disinfection method for controlling nitration of water supply pipe network - Google Patents
Water treatment disinfection method for controlling nitration of water supply pipe network Download PDFInfo
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- CN102120639A CN102120639A CN 201110075846 CN201110075846A CN102120639A CN 102120639 A CN102120639 A CN 102120639A CN 201110075846 CN201110075846 CN 201110075846 CN 201110075846 A CN201110075846 A CN 201110075846A CN 102120639 A CN102120639 A CN 102120639A
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Abstract
The invention relates to a water treatment disinfection method for controlling nitration of a water supply pipe network and belongs to the technical field of disinfection in water treatment. The occurrence of nitration in a chloramine disinfection water supply pipe network is controlled by the water treatment method which comprises the following steps: maintaining allowance of disinfectant in the water pipe network by using chlorine dioxide as a primary disinfectant and chloramine as a secondary disinfectant, and inactivating nitrobacteria by using chlorine dioxide and chlorite generated in the disinfection process. In the method, chloramine is added in the proportion of 1.5-2.0mg/L for carrying out secondary disinfection after chlorine dioxide which is added in the proportion of 0.8mg/L-1.0g/L reacts for 30 minutes. In the method, the inactivating effect on the nitrobacteria is improved on the basis of the high-efficiency inactivating function of nitrite which is generated during the disinfection process of chlorine dioxide on the nitrobacteria, thereby controlling nitrification in the chloramine disinfection pipe network and guaranteeing microorganism safety of drinking water.
Description
Technical field
The present invention relates to a kind of combined sterilizing technology of controlling the water supply network nitrification, especially relate to a kind of water treatment sterilization method of controlling the water supply network nitrification, belong to the disinfection technology field in the water treatment.
Background technology
In order to adapt in the new sanitary standard for drinking water strict demand to microbiological indicator and disinfection byproduct (DBP) control, the generation of by product is to improve the chemical safety of tap water in the control drinking water disinfection process, guarantee the microbial safety of tap water in the transmission ﹠ distribution process, chloramines is extensive gradually as the application of elementary sterilizing agent and two stage disinfection agent.Along with the extensive application of chloramines as sterilizing agent, it is found that in using the pipe network of chloramines disinfection, nitrification easily takes place, thus quality problem such as cause that water outlet heterotrophic bacterium, nitrite and nitrate exceed standard.Nitrification is to be caused by the growth of ammonia oxidizing bacteria (AOB) in pipe network system, and AOB can be oxidized to ammonia nitrogen in nitrous acid nitrogen as energy derive.When nitrification took place, the propagation of AOB was followed the accumulation of nitrous acid nitrogen, and a large amount of nitrous acid nitrogen quickens the decay of chloramines, causes the increase of heterotrophic bacterium (HPC) concentration thus.The rapid reduction of the unusual increase of heterotrophic bacterium concentration and chlorine residue amine concentration makes it to reach the requirement of water quality standard to microbiological indicator and chloramines residual concentration.
China nitrated phenomenon occurred in China's part city water-supply pipe network at present because source quality is seriously polluted, and ammonia-nitrogen content is higher in the water.According to investigations, the U.S. 63% uses water factory's generation nitrification of chloramines disinfection.When nitrification takes place, improve the effective measure that chloramines throwing amount is not the control nitration reaction, chloramines concentration still has the ammonia oxidation bacteria survival during up to 4-6.5mg/L, in fact has certain density sterilizing agent in the pipe network system of the U.S. more than 95%, but in most pipe network nitration reaction has taken place still.When serious nitrification takes place, the nitrous acid nitrogen that AOB oxidation ammonia nitrogen produces can react with chloramines, consumes a large amount of chloramines, causes discharging more ammonia nitrogen and offers ammonia oxidizing bacteria, this also is the simple chloramines that adds, one of reason of polynitration effect control poor effect.
Generate the chlorite after the dioxide peroxide hydrolysis, through the prior art literature search is found, the chlorite has good inactivating efficacy to AOB, its deactivation mechanism is: the oxygenizement that microorganism participates in occurs in the membrane structure of cell walls of nitrobacteria, when AOB oxidation ammonia nitrogen, can discharge hydrogen ion, can present temporary transient condition of acidic pH in the cell interior membrane structure this moment, and under acidic conditions, chlorition enters the inner dioxide peroxide (ClO that forms of bacterium
2), the dioxide peroxide of a small amount of concentration just can finally destroy nucleic acid by changing cell membrane permeability, infringement synthetic cell enzyme and proteinic function.
5NaClO
2+5HCl
?4ClO
2+5NaCl+HCl+H
2O
The dioxide peroxide associating chloramines disinfection that this patent proposed, utilize chlorite that dioxide peroxide produces deactivation to nitrobacteria in sterilizing process, reach the purpose of control nitrification, utilize the lasting disinfection of chloramines, reduce the number of heterotrophic bacteria in the pipe network.
Summary of the invention
The object of the present invention is to provide a kind of water treatment sterilization method of controlling the water supply network nitrification, in the control nitrification, effectively control the bacterial growth in the pipe network.
A kind of water treatment sterilization method of controlling the water supply network nitrification that the present invention proposes, the characteristics of its technical scheme are the heterotrophic organisms that utilizes in dioxide peroxide and the chloramines deactivation pipe network, nitrobacteria in the chlorite deactivation pipe network that utilizes dioxide peroxide and produce in sterilizing process has reached the control to the pipe network nitrification.
A kind of water treatment sterilization method of controlling the water supply network nitrification that the present invention proposes, this method are to utilize dioxide peroxide and chlorite the deactivation of nitrobacteria to be reached the effect of control pipe network nitrification.
A kind of water treatment sterilization method of controlling the water supply network nitrification that the present invention proposes, concrete steps are:
Add the 0.8-1.0mg/L dioxide peroxide in pending water, add the 1.5-2.0mg/L chloramines behind the sterilization 25-35min and proceed sterilization, the output water chlorine residue is at 0.3-1.0 mg/L.
A kind of water treatment sterilization method of controlling the water supply network nitrification that the present invention proposes, concrete steps are:
At same some an adding 0.8-1.0mg/L dioxide peroxide and the 1.5-2.0mg/L chloramines of adding of pending water, the output water chlorine residue is at 0.3-1.0 mg/L.
The present invention proposes to control the water treatment sterilization method of chloramines disinfection pipe network nitrification, this technology can be utilized the deactivation to nitrobacteria of the chlorite that produces in dioxide peroxide and the sterilizing process, control the generation of nitrification, reduce the dosage of chloramines simultaneously, have the following advantages:
(1) nitrobacteria in the deactivation water cost-effectively;
(2) dosage of reduction water Central Asia chlorate content, chloramines;
(3) produce the concurrent disinfection effect, improve the deactivation efficient of nitrobacteria and heterotrophic organism.
Description of drawings
Fig. 1 is the dioxide peroxide that adds earlier of the present invention, after add the chloramines process flow sheet.
Fig. 2 is for adding dioxide peroxide and chloramines process flow sheet simultaneously.
Embodiment
Further specify the present invention below by embodiment.
Embodiment 1
Technology as shown in Figure 1, to the water outlet disinfection of drinking water plant filter tank, add the 0.8-1.0mg/L dioxide peroxide in the clean water basin import, enter the clean water basin 30min that carries out disinfection behind the thorough mixing, then add the 1.5-2.0mg/L chloramines in the clean water basin outlet, the output water chlorine residue is at 0.3-1.0mg/L.
Embodiment 2
Technology to the water outlet disinfection of drinking water plant filter tank, adds 0.8-1.0mg/L dioxide peroxide, 1.5-2.0mg/L chloramines simultaneously in the clean water basin import as shown in Figure 2, and the output water chlorine residue is at 0.3-1.0mg/L.
Experimental result shows, after at first adding 0.8-1.0mg/L dioxide peroxide 30min, then add the 1.5-2.0mg/L chloramines, ammonia oxidizing bacteria inactivation ratio 1.7 log-2.0 log behind the 24h, heterotrophic bacterium inactivation ratio 2.6 log-2.9 log, residual chlorine amount remains on 0.3-1.2mg/L.
Breadboard test-results shows, a little adds 0.8-1.0mg/L dioxide peroxide and 1.5-2.0mg/L chloramines same adding, ammonia oxidizing bacteria inactivation ratio 1.8-2.1 log behind the 24h, and heterotrophic bacterium inactivation ratio 2.8-3.2 log, residual chlorine amount remains on 0.3-1.2mg/L.
Pilot plant test data in certain water factory show, adopt respectively simultaneously and add the 0.8-1.0mg/L dioxide peroxide with priority, 1.5-2.0mg/L chloramines, move 12 months data presentation continuously, simulation pipe network system water outlet nitrous acid nitrogen index is not seen remarkable increase, nitrification does not take place, and the chlorine residue of simulation pipe network system tip is at 0.3-1.0mg/L.
Claims (2)
1. water treatment sterilization method of controlling the water supply network nitrification, it is characterized in that concrete steps are: in pending water, add the 0.8-1.0mg/L dioxide peroxide, add the 1.5-2.0mg/L chloramines behind the sterilization 25-35min and proceed sterilization, the output water chlorine residue is at 0.3-1.0 mg/L.
2. water treatment sterilization method of controlling the water supply network nitrification is characterized in that concrete steps are: add pending water same and add a 0.8-1.0mg/L dioxide peroxide and a 1.5-2.0mg/L chloramines, the output water chlorine residue is at 0.3-1.0 mg/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110075846 CN102120639A (en) | 2011-03-29 | 2011-03-29 | Water treatment disinfection method for controlling nitration of water supply pipe network |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110075846 CN102120639A (en) | 2011-03-29 | 2011-03-29 | Water treatment disinfection method for controlling nitration of water supply pipe network |
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| CN102120639A true CN102120639A (en) | 2011-07-13 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9955698B2 (en) | 2015-10-28 | 2018-05-01 | Buckman Laboratories International, Inc. | Microbicidal compositions including a monochloramine and a peracid, and methods of using the same |
| US10212937B2 (en) | 2015-10-28 | 2019-02-26 | Buckman Laboratories International, Inc. | Microbicidal aqueous solutions including a monochloramine and a peracid, and methods of using the same |
| CN111480656A (en) * | 2020-04-30 | 2020-08-04 | 同济大学 | Method suitable for efficiently preparing high-concentration disinfectant monochloramine in water works |
| CN116693012A (en) * | 2023-05-06 | 2023-09-05 | 同济大学 | Method for sterilizing and cooperatively and rapidly removing ammonia nitrogen in overflow sewage of drainage pipeline containing chlorine disinfectant |
-
2011
- 2011-03-29 CN CN 201110075846 patent/CN102120639A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 《水处理技术》 20090228 查甫更等 二氧化氯-氯胺顺序投加联合消毒对饮用水中卤乙酸控制研究 第1.3，1.5，2.1节 1-2 第35卷, 第2期 2 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9955698B2 (en) | 2015-10-28 | 2018-05-01 | Buckman Laboratories International, Inc. | Microbicidal compositions including a monochloramine and a peracid, and methods of using the same |
| US10212937B2 (en) | 2015-10-28 | 2019-02-26 | Buckman Laboratories International, Inc. | Microbicidal aqueous solutions including a monochloramine and a peracid, and methods of using the same |
| CN111480656A (en) * | 2020-04-30 | 2020-08-04 | 同济大学 | Method suitable for efficiently preparing high-concentration disinfectant monochloramine in water works |
| CN116693012A (en) * | 2023-05-06 | 2023-09-05 | 同济大学 | Method for sterilizing and cooperatively and rapidly removing ammonia nitrogen in overflow sewage of drainage pipeline containing chlorine disinfectant |
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Application publication date: 20110713 |