Water treatment method for reducing chlorpyrifos pollution

A technology for water treatment and chlorpyrifos, which is applied in the field of water treatment and can solve the problems of filter clogging and low removal efficiency.

Inactive Publication Date: 2011-05-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of clogging and low removal efficiency of the filter caused by the oxidation method or the use of powdered activated carbon to remove chlorpyrifos from water in the filtration process, and to provide a water treatment method for reducing chlorpyrifos pollution

Method used

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0007] Specific embodiment one: the water treatment method step of reducing chlorpyrifos pollution in the present embodiment is as follows: one, wood powder activated carbon is made into homogeneous suspended wood powder activated carbon emulsion with water, then adds wood powder to the water intake place to be treated Activated carbon emulsion, so that the content of wood powder activated carbon in water is 10mg / L~60mg / L, the wood powder activated carbon emulsion is mixed with water and input into the water pipeline to flow with the water flow, the contact time of wood powder activated carbon and water flow is 2h; 2. Steps The water treated in the first step passes through the stabilizing well and the reaction tank respectively, and the polyaluminum chloride coagulant is added according to the dosage of 30mg / L before passing through the reaction tank; After pool, sand filter and disinfection, the water will be produced (chlorpyrifos content is 14.12μg / L-18.67μg / L).

[0008] T...

specific Embodiment approach 2

[0009] Specific embodiment two: the water treatment method of reducing chlorpyrifos pollution in this embodiment is as follows: one, wood powder activated carbon is made into wood powder activated carbon emulsion with water, then adds wood powder activated carbon emulsion to the water intake place to be treated, makes the wood powder activated carbon emulsion in water The content of powdered activated carbon is 10mg / L. Wooden powdered activated carbon emulsion is mixed with water and input into the water pipeline to flow with the water flow. The contact time between woody powdered activated carbon and water flow is 2h; and reaction tank, before passing through the reaction tank, add polyaluminum chloride coagulant according to the dosage of 30mg / L; three, after the water treated in step 2 is passed through the reaction tank, sedimentation tank, sand filter and disinfection, that is The water obtained (the content of chlorpyrifos is 17.42 μg / L); the content of chlorpyrifos in th...

specific Embodiment approach 3

[0010] Specific embodiment three: the water treatment method of reducing chlorpyrifos pollution in this embodiment is as follows: one, wood powder activated carbon is made into wood powder activated carbon emulsion with water, then adds wood powder activated carbon emulsion to the water intake of the water to be treated to make the wood powder activated carbon emulsion in the water The content of powdered activated carbon is 20mg / L. Wooden powdered activated carbon emulsion is mixed with water and input into the water pipeline to flow with the water flow. The contact time between woody powdered activated carbon and water flow is 2h; Well and reaction tank, add polyaluminum chloride coagulant according to the dosage of 30mg / L before passing through the reaction tank; 3. After the water treated in step 2 is passed through the reaction tank, sedimentation tank, sand filter and disinfection, Promptly get water (chlorpyrifos content is 15.68 μ g / L); The chlorpyrifos content in the w...

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Abstract

The invention discloses a water treatment method for reducing chlorpyrifos pollution, relates to the water treatment method, and solves the problems of blockage of a filter tank and low removal efficiency which are caused by an oxidation method or a filter process for removing chlorpyrifos in water by using powdered activated carbon. The method comprises the following steps of: 1, adding wood powdered activated carbon emulsion into a water intake of water to be treated to keep the wood powdered activated carbon content in the water at 10 to 60mg / L; 2, adding a polyaluminium chloride coagulant after the water treated in the step 1 passes through a stable pressure well and before the water passes through a reaction tank; and 3, sterilizing the water which is treated in the step 2 and passes through the reaction tank, a sedimentation tank and a sand filter tank to obtain outlet water. By the method, the chlorpyrifos in the water (the removal rate of the chlorpyrifos in the water is more than 89 percent) can be effectively removed; meanwhile, the problems of blockage of the filter tank and floating residues in the water which are caused by the adsorbed powdered activated carbon in the filter process are solved, and the quality of the outlet water is improved.

Description

technical field [0001] The invention relates to a water treatment method. Background technique [0002] Chlorpyrifos is an organophosphorus pesticide that is widely used and replaces highly toxic pesticides such as methamidophos and parathion. Whether this high-efficiency and low-toxicity pesticide has long-term effects on the human body, especially on children, is currently being questioned. widespread attention at home and abroad. During its large-scale use, chlorpyrifos has become one of the important risk pollutants of urban water source water pollution due to the potential danger of excessive use of pesticides and pesticide leakage caused by transportation accidents. In recent years, with the aggravation of water source water pollution, many water plants have added pretreatment or advanced treatment links to strengthen the treatment capacity, but these water plants are generally designed to deal with continuous, conventional, and slightly polluted water source water qu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/52C02F1/28
Inventor 李伟光李鑫公绪金
Owner HARBIN INST OF TECH
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