Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for reducing chlorite as disinfection by-product of drinking water

A technology for disinfection by-products and chlorite, which is applied in chemical instruments and methods, neutralized water/sewage treatment, oxidized water/sewage treatment, etc. The problems of large dosage and troubles in water plants can improve the safety of water quality and reduce the content of chlorite.

Inactive Publication Date: 2013-08-28
SHENZHEN SHENSHUI BAOAN WATER
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, due to raw water quality factors, the dosage of chlorine dioxide is often relatively large. When water plants apply chlorine dioxide pre-oxidation and disinfection processes, the content of by-product chlorite in the water is often difficult to meet the standard in a stable way. Seeking a breakthrough to solve a common problem that has plagued water plants applying chlorine dioxide pre-oxidation and disinfection processes for many years

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for reducing chlorite as disinfection by-product of drinking water
  • Method for reducing chlorite as disinfection by-product of drinking water
  • Method for reducing chlorite as disinfection by-product of drinking water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1 A water plant in Shenzhen City reduces the treatment method of disinfection by-product chlorite in the factory water

[0028] Raw water situation

[0029] The raw water is reservoir water, and the water source is subject to organic pollution. It belongs to Class III surface water quality, with an average turbidity of 14.03 NTU, a maximum manganese content of 0.46 mg / L, and an average of 37.2 million algae cells per liter. It has obvious high algae and low Features of turbidity and organic micro-pollution.

[0030] Chlorine Dioxide Preparation

[0031] Using the complete set of equipment from Shenzhen Suriman Company, the preparation method is as follows: sodium chlorate, sulfuric acid (70% concentration by mass) and hydrogen peroxide (50% concentration by mass) are mixed and reacted to prepare chlorine dioxide (gaseous state, purity 95%) %).

[0032] figure 1 For the present invention reduces the method flowchart of drinking water disinfection by-produc...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for processing drinking water, in particular to a method for reducing chlorite as the disinfection by-product of drinking water. In the method, chlorine dioxide gas is first used to preoxidate raw water, lime is then added to regulate the pH value, coagulant is then added, coagulation, sedimentation and filtration are carried out to remove turbidity, and sodium hypochlorite solution is added for disinfection. Under the premise of ensuring that drinking water can meet the disinfection effect, the method which adopts the chlorine dioxide for preoxidation and the sodium hypochlorite for disinfection can greatly reduce the content of the chlorite as the disinfection by-product and ensure that the content of the chlorite can absolutely meet the requirement of the national standard on drinking water, thus greatly enhancing the safety of water quality.

Description

technical field [0001] The invention relates to a drinking water treatment method, in particular to a method for reducing drinking water disinfection by-product chlorite. Background technique [0002] In the process of surface raw water treatment, the water plant must include the addition of disinfectants to disinfect the water body. Depending on the quality of the raw water, it usually also includes adding an oxidant to pre-oxidize the raw water to oxidize the organic matter and algae in the water. At present, it is common to use chlorine dioxide as a pre-oxidant and disinfectant in small and medium-sized water plants in China, and it is also used in a few large water plants. [0003] However, theory and practice show that about 70% of chlorine dioxide disinfection is directly converted into chlorite, a carcinogenic and mutagenic by-product of disinfection. "National Drinking Water Hygienic Standard" (GB5749-2006) stipulates that the maximum limit of chlorite by-product s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/72C02F1/66C02F1/52C02F1/50
Inventor 黄晓东汪义强文汉华陈鹰
Owner SHENZHEN SHENSHUI BAOAN WATER
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com