Water treatment disinfection method for controlling nitration of water supply pipe network

A technology of nitrification and disinfection methods, applied in the directions of oxidized water/sewage treatment, sterilization/microdynamic water/sewage treatment, etc., can solve the problems of consumption of chloramines, poor control effect of polynitrification, etc., and achieve improved inactivation. The effect of efficiency

Inactive Publication Date: 2011-07-13
TONGJI UNIV
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AI Technical Summary

Problems solved by technology

When severe nitrification occurs, the nitrite nitrogen produced by AOB oxidizing ammonia nitrogen will react with chloramine and consume a large amount of chloramine, resulting in the release of more ammonia nitrogen for ammonia oxidizing bacteria. This is also a simple addition of chloramine. One of the reasons for poor control of polynitrification

Method used

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  • Water treatment disinfection method for controlling nitration of water supply pipe network
  • Water treatment disinfection method for controlling nitration of water supply pipe network
  • Water treatment disinfection method for controlling nitration of water supply pipe network

Examples

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Effect test

Embodiment 1

[0022] Such as figure 1 The process shown is to disinfect the effluent from the filter of the drinking water plant, add 0.8-1.0mg / L chlorine dioxide to the inlet of the clear water tank, mix it thoroughly and enter the clear water tank for disinfection for 30 minutes, and then add 1.5- 2.0mg / L chloramine, the residual chlorine in factory water is 0.3-1.0mg / L.

Embodiment 2

[0024] Such as figure 2 The process shown is to disinfect the effluent from the filter of the drinking water plant, and add 0.8-1.0mg / L chlorine dioxide and 1.5-2.0mg / L chloramine to the inlet of the clean water tank at the same time, and the residual chlorine in the factory water is 0.3-1.0mg / L.

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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 [0001] The invention relates to a combined disinfection technology for controlling the nitrification of a water supply pipe network, in particular to a water treatment and disinfection method for controlling the nitrification of a water supply pipe network, belonging to the technical field of disinfection in water treatment. Background technique [0002] In order to adapt to the strict requirements of microbial indicators and disinfection by-product control in the new drinking water hygiene standards, control the generation of by-products in the process of drinking water disinfection to improve the chemical safety of drinking water and ensure the microbial contamination of drinking water during the distribution process. Safety, the application of chloramine as primary disinfectant and secondary disinfectant is gradually widespread. With the extensive application of chloramine as a disinfectant, it is found that nitrification is prone to occur in the pipe netw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/76C02F1/50
Inventor 周玲玲张永吉曾果邓慧萍
Owner TONGJI UNIV
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