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Method for pre-oxidizing and reinforcing coagulation of algae cells and controlling release of organic substances in algae cells

A technology of pre-oxidation of algae cells, applied in the direction of oxidized water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problem of slow oxidation of ferrous iron, and achieve the effect of simple method, excellent algae removal performance, and easy realization

Active Publication Date: 2012-10-03
清华苏州环境创新研究院
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The inventor of this case is aimed at this problem, and considers that the oxidation of ferrous iron is relatively slow, causes the KMnO proposed originally 4 -The problem of high iron concentration in the effluent of the Fe(II) process. 4 -The Fe(II) process is improved, and a part of the ferrous salt is replaced with iron salt, which is a method of pre-oxidation, strengthening the coagulation of algae cells and controlling the release of organic matter in algae cells discussed in the present invention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Eutrophic pollution occurred in the water source of a water plant, the concentration of algal cells reached 100,000 / ml, and the turbidity of raw water was 15 NTU. The flocculant used in the water plant was polyaluminum chloride. When there is no eutrophication pollution in the water source, the dosage of flocculant is 15mg / L to achieve a good removal effect, and the filtration cycle of the filter is 24 hours. However, after the above-mentioned eutrophication pollution occurred in the water source, the dosage of the flocculant was increased to 25mg / L, and the treatment effect was still unsatisfactory. The efficiency is only 80%, and the filtration cycle of the filter is shortened to 22 hours.

[0029] Adopt the method of the present invention to strengthen algae removal to the above-mentioned water source polluted by eutrophication:

[0030] 1) Potassium permanganate, ferrous sulfate and ferric sulfate are mixed with water respectively, and dissolved under sufficient st...

Embodiment 2

[0034] Eutrophic pollution occurred in the water source of a water plant, the concentration of algae cells reached 1 million / ml, the turbidity of raw water was 40NTU, and the flocculant used in the water plant was aluminum sulfate. When there is no eutrophication pollution in the water source, the dosage of flocculant is 20mg / L (calculated as aluminum) to achieve a good removal effect, and the filtration cycle of the filter is 24 hours. However, after the above-mentioned eutrophication pollution occurred in the water source, the dosage of flocculant was increased to 30mg / L, and the treatment effect was still unsatisfactory. Only 70%, the filtration period of the filter is shortened to 18 hours.

[0035] Adopt the method of the present invention to strengthen algae removal to the above-mentioned water source polluted by eutrophication:

[0036] 1) Mix calcium hypochlorite and magnesium chloride with water and dissolve under sufficient stirring to obtain a mixed aqueous solutio...

Embodiment 3

[0040] Eutrophic pollution occurred in the water source of a water plant, the concentration of algae cells reached 5 million / ml, and the turbidity of raw water was 200 NTU. The flocculant used in the water plant was polyaluminum chloride. When there is no eutrophication pollution in the water source, the dosage of flocculant is 25mg / L (calculated as aluminum) to achieve a good removal effect, and the filtration cycle of the filter is 24 hours. However, after the above-mentioned eutrophication pollution occurred in the water source, the dosage of the flocculant was increased to 50mg / L, and the treatment effect was still unsatisfactory. Only 40%, the filtration period of the filter is shortened to 15 hours.

[0041] Adopt the method of the present invention to strengthen algae removal to the above-mentioned water source polluted by eutrophication:

[0042] 1) Mix ozone with water and dissolve under sufficient stirring to obtain an aqueous solution of ozone; mix polyferrous sulf...

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Abstract

The invention belongs to the technical field of treatment of drinking water and particularly relates to a method for pre-oxidizing and reinforcing coagulation of algae cells and controlling release of organic substances in algae cells. Aiming at the eutrophicated pollution of surface water such as pools, reservoirs and the like, the invention provides a method of orderly adding pre-oxidant and ferrite, ferric salt and the like. The pre-oxidant inactivates the algae cells while the ferrite cancels the pre-oxidization to control the continuous release of the organic substances in the algae cells, and the nascent trivalent iron generated by the oxidization of ferrite and ferric salt are used as a coagulant; and the coagulation of the pre-oxidized algae cells is reinforced. The method disclosed by the invention is mainly applied to purification for drinking water factories, and is also applied to treatment of the landscape water with the target of recycling the landscape water body, pre-treatment of the eutrophicated water body and inhibition of growth of algae cells.

Description

technical field [0001] The invention belongs to the technical field of drinking water treatment, and particularly relates to a method for pre-oxidizing and strengthening the coagulation of algae cells and controlling the release of organic matter in the algae cells. 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 quality. In recent yea...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/72
Inventor 曲久辉马敏刘锐平刘会娟
Owner 清华苏州环境创新研究院
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