Method for reinforcing coacervation algae removal and controlling release of intracellular substances

A technology of substances and algae cells, applied in the field of strengthening coagulation to remove algae and controlling the release of intracellular substances, can solve the problems of increased disinfection by-products, poor coagulation and algae removal effect, etc., to reduce turbidity and particle concentration, engineering Low investment cost and improved removal effect

Active Publication Date: 2012-02-08
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an economical, effective and easy-to-apply method in engineering for drinking water plants that use high-algae water as the water source and have poor coagulation and algae-removal effects, so as to effectively improve the algae-removal effect and control intracellular metabolism The release of substances, thereby reducing the problem of increased disinfection by-products caused by the release of intracellular substances in the subsequent disinfection process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Eutrophic pollution occurred in the water source of a water plant, the concentration of algae cells reached 50 million / ml, the turbidity of raw water was 10NTU, and the flocculant used in the water plant was polyaluminum chloride. When no eutrophication pollution occurs, the flocculant dosage is 15mg / L to achieve a good removal effect, and the filtration cycle is 24 hours. However, after eutrophication pollution occurred, the dosage of flocculant was increased to 30mg / L, and the treatment effect was still unsatisfactory. The turbidity of water after sinking and filtration increased, and the removal rate of algae cells after sinking was only 50%. The filter cycle is shortened to 20 hours.

[0020] Adopt the method of the present invention to strengthen algae removal: 1) Potassium permanganate and ferric chloride are dissolved under sufficient stirring, obtain the mixed solution that potassium permanganate and ferric chloride are formed, wherein potassium permanganate and...

Embodiment 2

[0022] Eutrophic pollution occurred in the water source of a water plant, the concentration of algae cells reached 200 million / ml, and the turbidity of raw water was 20NTU. The flocculant used in the water plant was polyaluminum chloride. When no eutrophication pollution occurs, the flocculant dosage is 15mg / L to achieve a good removal effect, and the filtration cycle is 24 hours. However, after eutrophication pollution occurred, the dosage of flocculant was increased to 30mg / L, and the treatment effect was still unsatisfactory. The turbidity of water after sinking and filtration increased, and the removal rate of algae cells after sinking was only 50%. The filter cycle is shortened to 16 hours.

[0023] Adopt method of the present invention to strengthen algae removal: 1) Potassium permanganate and ferric sulfate are dissolved under sufficient stirring, obtain the mixed solution that potassium permanganate and ferric sulfate are formed, wherein the mol ratio of potassium perm...

Embodiment 3

[0025] A certain degree of eutrophication occurred in the water source of a water plant. The concentration of algae cells was 4 million / ml, and the turbidity of raw water was 5 NTU. The flocculant used in the water plant was aluminum sulfate. When no eutrophication pollution occurs, the flocculant dosage is 12mg / L to achieve a good removal effect, and the filtration cycle is 24 hours. The increase of the concentration of algae cells in the raw water led to an increase in the number of algae cells after filtration to 600,000 / ml, and the filtration period of the filter was shortened to 22 hours.

[0026]Adopt the method of the present invention to strengthen algae removal: 1) Potassium permanganate and ferric chloride are dissolved under sufficient stirring, obtain the mixed solution that potassium permanganate and ferric chloride are formed, wherein potassium permanganate and trichloro The molar ratio of ferric oxide is 1:10. 2) Add the mixed solution composed of potassium perm...

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Abstract

The invention which belongs to the technical field of drinking water treatment especially relates to a method for reinforcing the coacervation algae removal and controlling the release of intracellular substances in the process of high algae water treatment. The invention which aims at the eutrophication pollution of surface water sources of lakes, reservoirs and the like provides a method for improving the algae cell removal effect of technologies of coagulation, deposition and filtration of a water work with the combined action of potassium permanganate and a ferric salt, wherein the appropriate oxidation effect of potassium permanganate inactivates and inhibits the activity of algae cells and controls the release of intracellular metabolites, and In situ MnO2 which is in situ generatedthrough a reduction reaction of potassium permanganate deposits on the surface of the algae cells to improve the settlement performance of the algae cells; and the electrical neutralization of the ferric salt allows the potential of the surface of the algae cells to be improved, and In situ Fe(OH)3 which is in situ generated through a hydrolysis reaction of the ferric salt deposits on the surfaceof the algae cells to improve the potential and the settlement performance of the surface of the algae cells. The method of the invention which is mainly applied to the purification in the drinking water work can also be applied to landscape water treatment which aims at the landscape water reuse and the water source pretreatment of the eutrophication water to inhibit the growth of the algae cells.

Description

technical field [0001] The invention belongs to the technical field of drinking water treatment, and in particular relates to a method for removing algae and controlling the release of intracellular substances by strengthening coagulation in the process of treating high-algae water. Background technique [0002] Lakes, reservoirs, etc. are commonly used surface water sources. For example, my country's Beijing, Shanghai, Harbin, the urban agglomeration around Taihu Lake, and cities along the Yellow River all use lake or reservoir water as their surface water source. However, due to the discharge of nutrient sources such as nitrogen and phosphorus, many lakes and reservoirs with the function of drinking water sources show different degrees of eutrophication trends, and may lead to algal blooms under suitable environmental conditions, becoming a source of water pollution. It is an important hidden danger in the process of plant treatment and the safety of drinking water qualit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/72
Inventor 曲久辉刘会娟刘锐平马敏
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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