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A method for preventing and treating freshwater shellfish in raw water pipelines

A technology for freshwater shell vegetables and raw water pipes, which is applied to the device, application, animal husbandry and other directions of capturing or killing insects, and achieves the effects of reliable control effect, low control cost and low control raw material.

Inactive Publication Date: 2016-08-24
NANTONG UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there are no literature reports on the chemical control of shellfish organisms. For the killing of shellfish organisms in pipelines, chemical agents are the main method, especially chlorine is the most widely used

Method used

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  • A method for preventing and treating freshwater shellfish in raw water pipelines

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Control test of productive freshwater shellfish:

[0020] The chlorine gas dosing test is carried out on the DN1000 raw water pipe. The purpose of the test is to test the amount of chlorine gas that the raw water needs to consume, so as to determine the dosage of chlorine gas.

[0021] The test process is as follows:

[0022] Open the valves (3 pieces) along the raw water pipe, and the water flow rate is 1000m 3 / h, then add chlorine to the raw water pipe, the flow rate of the chlorinator is 50kg / d, and the calculated chlorine dosage is 2mg / l. The pipeline has a total length of 1.7km and a flow rate of 1000m 3 Theoretical residence time is 1.33 hours when / h. Sampling and testing after 1 hour showed that the concentration of residual chlorine was 1.5 mg / l. After 20 minutes of continuous dosing, the residual chlorine was detected as 2.0 mg / l, that is, the valves at both ends of the DN1000 raw water pipe were closed, and chlorine addition was stopped. At this time, the...

Embodiment 2

[0032] Freshwater shellfish killing test in the laboratory:

[0033] 1. Reagent: sodium hypochlorite

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Abstract

The invention discloses a method for preventing and controlling freshwater shellfish in raw water pipelines, and its innovative point is that it includes the steps of determining the dosage of chlorine gas, adding chlorine to remove freshwater shellfish, and washing the pipeline. The method for preventing and treating freshwater shell vegetables in raw water pipelines of the present invention continuously adds chlorine, controls the concentration of chlorine gas at 1-2 mg / l, and controls the residual chlorine within 0.5 mg / l, without producing a large amount of disinfection by-products to the raw water. Under the premise, the control effect is reliable, safe and long-lasting. Generally, after using this control method for about a week, freshwater shell vegetables will die in large quantities, and the bivalves will be fully produced and show obvious signs of death; the control raw materials of the present invention are low , the cost of prevention and treatment is low, the prevention and control method is simple and easy to operate, and will not cause secondary pollution.

Description

technical field [0001] The invention relates to a method for preventing and controlling freshwater shellfish in raw water pipelines, and belongs to the field of chemical method prevention and control. Background technique [0002] Freshwater shellfish can secrete silk and firmly attach to hard objects through the silk. Freshwater shellfish usually does not move after the larva metamorphoses and attaches to the pipe. It passively filters organic debris and lower animals in the water with gills. Food sources and suitable growth environment promote massive growth and reproduction. Water temperature will also affect the metabolism of freshwater shellfish, but it has greater adaptability to temperature changes, and has a strong ability to withstand drying. The body length of freshwater shellfish is very small when it develops into larvae, generally only a few hundred microns, and the adult shell is tens of millimeters long. When it is a larvae, it responds obviously to light. Un...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01M1/20
Inventor 石健顾宇人顾圣全曹林春徐永进陈浩然
Owner NANTONG UNIVERSITY
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