Whole-flow multi-barrier control system and method for aldehyde halide disinfection byproducts in drinking water

A disinfection by-product, full-process technology, applied in water treatment parameter control, water/sewage multi-stage treatment, water pollutants, etc., can solve the problems of lack of full-process multi-stage barrier control strategy, dispersion, and lack of systematicness.

Pending Publication Date: 2019-08-23
SHENZHEN WATER GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, the existing control systems and methods for halogenated aldehyde disinfection by-products are relatively scattered, and mos

Method used

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  • Whole-flow multi-barrier control system and method for aldehyde halide disinfection byproducts in drinking water
  • Whole-flow multi-barrier control system and method for aldehyde halide disinfection byproducts in drinking water
  • Whole-flow multi-barrier control system and method for aldehyde halide disinfection byproducts in drinking water

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Experimental program
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Embodiment 1

[0043] A control system for realizing the aforementioned technical scheme, the integrated control flow chart is as follows figure 1 Shown:

[0044] The control system includes in turn:

[0045] (1) Risk early warning and risk level judgment module of disinfection by-products in raw water quality;

[0046] (2) One or a combination of disinfection by-product source reduction unit, generation suppression unit, and post-generation removal unit; preferably, the source reduction unit, generation suppression unit, and post-generation removal unit are connected in sequence.

[0047] (3) One or a combination of ultraviolet irradiation treatment unit or chlorine dioxide disinfection treatment unit;

[0048] (4) carbon sand filter unit, ozone-biological activated carbon (O 3 - one or a combination of BAC) depth processing units.

[0049] The specific implementation process is as follows: (1) Judging the risk level of disinfection by-products according to the early warning method of r...

Embodiment 2

[0051] A kind of realization scheme of the present invention, control flow chart sees figure 2 shown. The water plant uses Dongjiang water as the water source (surface class III water body), and the treatment process is coagulation, sedimentation, V-shaped filter tank filtration, compound chlorine dioxide or sodium hypochlorite as pre-oxidant, and sodium hypochlorite as the main disinfection. At present, sodium hypochlorite is used for disinfection, which has problems of poor sterilization effect and excessive risk of by-products such as chloral.

[0052] Relying on the upgrade and renovation project of the water plant, adjust and optimize the pre-oxidation method to inhibit the formation of chloral; strengthen and transform the conventional process, build advanced treatment facilities, optimize the removal of by-products and their precursors; optimize the disinfection method to reduce the formation of by-products ; When the water quality deteriorates, take emergency control...

Embodiment 3

[0061] A kind of realization scheme of the present invention, control flow chart sees image 3 shown. The design scale of the water plant is 35,000 m 3 / d, the raw water comes from the river, and is treated by conventional processes such as grid reaction tanks, inclined tube sedimentation tanks, and siphon filters. Pre-oxidation with high-purity chlorine dioxide and main disinfection with sodium hypochlorite. The city where the city is located has a subtropical climate in the south, with high temperature and rain all year round, and there are breeding areas in the upper reaches of the river. The raw water in the rainy season is seriously polluted by non-point sources, and there is a phenomenon of high short-term organic matter concentration. The processing effect is limited. The organic matter in the water body reacts with the disinfectant sodium hypochlorite to produce a variety of disinfection by-products, among which the problem of chloral is the most prominent, and effe...

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Abstract

The invention belongs to the technical field of disinfection of drinking water and relates to a whole-flow multi-barrier control system and method for aldehyde halide disinfection byproducts. The method comprises main contents as follows: (1) the risk grades of the disinfection byproducts are judged according to a raw-water water quality risk early warning method; (2) a single technology or a combination of a plurality of technologies in methods including source reduction, generation inhibition, removal after generation and the like is adopted against to different risk grades; (3) when above treatment measures are adopted, the risks of the aldehyde halide disinfection byproducts are still uncontrollable and the generation of the aldehyde halide disinfection byproducts can be inhibited by adopting an ultraviolet or chlorine dioxide disinfection manner; and (4) a sand filter tank can be modified into a carbon sand filter tank or an ozone-biological activated carbon (O3-BAC) deep treatment technology is built with respect to water plants which keep the risks of the aldehyde halide disinfection byproducts high for long time, so as to finally eliminate the risks.

Description

technical field [0001] The invention belongs to the technical field of drinking water disinfection, and relates to a system and method for controlling halogenated aldehyde disinfection by-products with a full-process multi-level barrier. Background technique [0002] Chlorine disinfection is the most widely used disinfection method for drinking water and has made great contributions to the protection of human life and health. However, while chlorine disinfection can kill microorganisms, it can react with organic matter in water to generate a variety of chlorinated disinfection by-products. Halogenated aldehydes are the third largest type of disinfection by-products after trihalomethanes and haloacetic acids, including Chloroacetaldehyde, Dichloroacetaldehyde, Chloroacetaldehyde, Bromoacetaldehyde, Dibromoacetaldehyde, Tribromoacetaldehyde, Bromochloroacetaldehyde, Bromodichloroacetaldehyde, Dibromochloroacetaldehyde Among them, chloral is the control index of my country's "Dr...

Claims

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Application Information

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IPC IPC(8): C02F1/76C02F1/50C02F1/32C02F1/72C02F1/28C02F1/78C02F9/04C02F9/08C02F101/36
CPCC02F1/001C02F1/283C02F1/32C02F1/725C02F1/76C02F1/78C02F9/00C02F2101/36C02F2209/29C02F2303/04
Inventor 蔡广强张金松黄河洵
Owner SHENZHEN WATER GRP CO LTD
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