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Method for inactivating invertebrates in water supply system and application thereof

A technology for invertebrates and water supply systems, which is applied to the field of invertebrate inactivation in water supply systems, can solve the problems of long time and large dose, and achieve the effects of small dose, convenient operation and fast killing speed.

Active Publication Date: 2014-05-28
SHENZHEN WATER GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] (2) The required dose is large and the time is long
At the same time, due to the relatively large safety risks of pesticides such as pyrethrins, WHO stipulates that permethrin in drinking water quality standards should be less than 20 μg / L, and even in some specific countries, pesticides (including pyrethrins or Permethrin) is not allowed to be put into drinking water

Method used

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  • Method for inactivating invertebrates in water supply system and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] As attached figure 1 As shown, the method of inactivating invertebrates in the water supply system includes the following steps:

[0045] Step (1): Add free carbon dioxide to increase the concentration of free carbon dioxide in the water supply system, reduce the oxygen carrying capacity of invertebrate hemoglobin, and then inactivate the invertebrates in the water supply system

[0046] This is specifically: adding bicarbonate or carbonate solution and dilute acid solution to the target structure, and using acid-base neutralization reaction to generate free carbon dioxide.

[0047] Add sodium bicarbonate to the target structure at a ratio of 0.42g / L. The sodium bicarbonate solution and the filter material of the filter were thoroughly mixed for 5 minutes by air flushing. Filter material includes activated carbon filter material (broken carbon, columnar carbon) and quartz sand filter material. Then, within 2 minutes, a 0.005 mol / L dilute hydrochloric acid solution of the sa...

Embodiment 2

[0055] The method of inactivating invertebrates in the water supply system includes the following steps:

[0056] Step (1): Add free carbon dioxide to increase the concentration of free carbon dioxide in the water supply system, reduce the oxygen carrying capacity of invertebrate hemoglobin, and then inactivate the invertebrates in the water supply system

[0057] The free gaseous carbon dioxide is produced by the free carbon dioxide generator, and the free carbon dioxide solution is delivered to the target structure and the pipe network, and the free carbon dioxide solution fully contacts the invertebrates in the filter during the air flushing. The free carbon dioxide concentration in the target structure and pipe network is 0.2g / L.

[0058] Step (2): Remove inactivated invertebrates from the water supply system

[0059] After reacting for 15 minutes, remove the inactivated invertebrates from the target structure and pipe network by air-water backwashing, and air-water combined backw...

Embodiment 3

[0061] The method of inactivating invertebrates in the water supply system includes the following steps:

[0062] Step (1): Add free carbon dioxide to increase the concentration of free carbon dioxide in the water supply system, reduce the oxygen carrying capacity of invertebrate hemoglobin, and then inactivate the invertebrates in the water supply system

[0063] After being pressurized directly by a pressurized water jet, the finished liquid carbon dioxide is delivered to the target structure and pipe network to increase the concentration of free carbon dioxide in the water of the structure. The free carbon dioxide concentration in the target structure and pipe network is 1.0g / L.

[0064] Step (2): Remove inactivated invertebrates from the water supply system

[0065] After reacting for 1 min, the inactivated invertebrates in the target structure and pipe network are removed by flushing with water.

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Abstract

The invention provides a method for inactivating invertebrates in a water supply system. The method comprises the following steps of: (1) adding an inactivator into the water supply system; and (2) removing the inactivated invertebrates, wherein the inactivator is free carbon dioxide. The invention also provides application of the method in killing invertebrates such as insect larvae, nematodes, rotifers, shellfishes and annelids in the water supply system. The invertebrates in the water supply system are inactivated by increasing the concentration of the free carbon dioxide in the water supply system and reducing the oxygen carrying capacity of the hemoglobin of the invertebrates, so the method has the advantages of wide application range, environmental friendliness, no pollution, high killing speed and high inactivation ratio as high as 90 to 100 percent. In addition, the method also has the advantages of convenient system operation, low operating cost, high practicability and capability of being combined with other processes.

Description

Technical field [0001] The invention relates to drinking water treatment technology, in particular to a method and application for inactivating invertebrates in a water supply system. Background technique [0002] Invertebrate (Invertebrate) is an animal without a spine on the back, and its species accounts for 95% of the total number of animal species. They are the primitive forms of animals and are the general term for all phyla in the animal kingdom except protozoa and vertebrate subphylums. There are many kinds of invertebrates and they are widely distributed. They are found in surface water and groundwater in lakes, reservoirs, etc. all over the world. [0003] According to surveys, during a one-year study of water source reservoirs in some cities in my country, more than fifty kinds of microaquatic animals (genus) were discovered, among which the dominant species is the chironomid larva (commonly known as bloodworm). , Nematodes, water fleas and other invertebrates. They en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/66
Inventor 张金松刘丽君尤作亮尹文超赵建树
Owner SHENZHEN WATER GRP CO LTD
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