Method for killing limnoperna lacustris in long-distance raw water conveying pipe through hydrogen peroxide

A raw water pipeline, hydrogen peroxide technology, applied in the directions of oxidized water/sewage treatment, sterilization/microdynamic water/sewage treatment, etc., can solve the problems of complicated operation, poor feasibility, threat to drinking water safety, etc. Safe and convenient, good removal effect, highly feasible effect

Inactive Publication Date: 2014-01-08
HARBIN INST OF TECH
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Problems solved by technology

[0004] In order to solve the problems that the existing methods for killing freshwater shellfish in raw water pipelines are complex in operation and poor in feasibility, and the killing method using other disinfectants may produce disinfection by-products, which threaten the

Method used

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Effect test

specific Embodiment approach 1

[0014] Specific implementation mode 1: with a water supply flow rate of 500m 3 Take a long-distance water pipeline in southern my country with a pipe diameter of more than 400mm and a water delivery distance of more than 5km as an example. Adding 7.5 days, the mortality rate of freshwater shellfish is more than 90%.

[0015] Specific embodiment two: under the condition of 25 ℃, when the concentration of hydrogen peroxide in raw water is 1mg / L, dosing continuously for 7~14 days, the mortality rate of freshwater shellfish is more than 70%, the 14th day freshwater shellfish The removal rate can reach more than 80%.

specific Embodiment approach 3

[0016] Specific implementation method three: under the condition of 25°C, when the concentration of hydrogen peroxide in the raw water is 3mg / L, continuous dosing for 8-11 days, the mortality rate of freshwater shellfish on the 8th day is more than 70%, and on the 11th day The removal rate of freshwater shellfish can reach 100%.

[0017] Embodiment 4: Under the condition of 25°C, when the concentration of hydrogen peroxide in the raw water is 5 mg / L, continuous dosing for 4 to 5 days, the mortality rate of freshwater shellfish on the 4.5th day is above 70%, and on the 5th day The mortality rate of freshwater shellfish is 100%.

[0018] Embodiment 5: Under the condition of 25°C, when the concentration of hydrogen peroxide in the raw water is 10 mg / L, continuous dosing for 4 to 6 days, the mortality rate of freshwater shellfish on the 4th day is above 70%, and on the 6th day The mortality rate of freshwater shellfish is 100%.

[0019] Embodiment 6: Under the condition of 30°C,...

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Abstract

The invention discloses a method for killing limnoperna lacustris in a long-distance raw water conveying pipe through hydrogen peroxide, and relates to a method for killing the limnoperna lacustris in a raw water conveying pipe. The method comprises the steps that the hydrogen peroxide is thrown in the long-distance raw water conveying pipe at the temperature of 20 DEG C to 30 DEG C for 4 to 14 days, and the concentration of the hydrogen peroxide in the raw water is controlled to be 1 to 10 mg/L. According to the method for killing the limnoperna lacustris in the long-distance raw water conveying pipe through the hydrogen peroxide, the hydrogen peroxide not only has the effect of killing the limnoperna lacustris, but also has the good pre-oxidation effect as pre-oxidant. The hydrogen peroxide has the good removing effect on turbidity, algae, bacteria and coilform groups, and the difficulty of the follow-up water processing technology is not increased. The method for killing the limnoperna lacustris in the long-distance raw water conveying pipe through the hydrogen peroxide can effectively control the amount of the limnoperna lacustris in raw water and in the pipe, and by means of the method, operation is safe and convenient, and the feasibility is high.

Description

technical field [0001] The invention relates to a method for killing freshwater shellfish in a raw water delivery pipeline, in particular to a method for killing freshwater shellfish in a long-distance raw water delivery pipeline with hydrogen peroxide. Background technique [0002] Water quality deterioration and biofouling problems caused by freshwater husks on water pipelines are new problems emerging in the southern water supply system. Freshwater shellfish is a kind of filter-feeding benthic animal. They will migrate and reproduce downstream along the box culvert pipeline of the water supply project, grow densely on the pipe wall, and enter the water supply plant of the main line project of the water supply network, attach to the water collection well, settle pool, block grilles, pipes and other structures. Due to the growth and metabolism of a large number of freshwater shell vegetables in the water, their respiration will consume dissolved oxygen in the water, excr...

Claims

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Application Information

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IPC IPC(8): C02F1/50C02F1/72
Inventor 刘冬梅崔福义王睿洪洁唐欢潘云皓
Owner HARBIN INST OF TECH
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