Combined sterilizing and algae-removing technology of sewerage by efficient oxidation process

An oxidation method and sewage technology, which is applied in the direction of oxidized water/sewage treatment, sterilization/microdynamic water/sewage treatment, etc., can solve the problems of not being widely used, low sterilization and algae removal effect, and decreased biocidal ability, etc., to achieve Inhibition of algae regeneration, long-term sterilization and algae removal, and prevention of water blooms

Inactive Publication Date: 2009-01-28
BEIJING UNIV OF CHEM TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

Chlorine dioxide is difficult to solve the problem that a large number of algae die and deposit on the bottom of the water, and are decomposed by microorganisms to consume dissolved oxygen in the water, resulting in water deterioration.
The bactericidal and algae-removing effect of sodium hypochlorite is lower than that of chlorine dioxide, and its biocidal ability decreases significantly with the increase of pH value. Therefore, it has not been widely used at home and abroad at present.

Method used

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  • Combined sterilizing and algae-removing technology of sewerage by efficient oxidation process
  • Combined sterilizing and algae-removing technology of sewerage by efficient oxidation process

Examples

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Embodiment 1

[0027] 1) Oxygen was prepared by pressure swing adsorption to produce O 2 gas;

[0028] 2) with the O prepared in step 1) 2 The gas is passed into the ozone generator to produce O 3 gas;

[0029] 3) Send the untreated eutrophication raw river water into the gas-liquid mixer, and use the negative pressure generated in the gas-liquid mixer to make the O prepared in step 2) 3 The gas is introduced into the gas-liquid mixer (O 3 The feed rate of gas is 4mg / L water), after standing at room temperature for 48 hours, fully stir, to eliminate remaining O 3 Impact;

[0030] 4) Electrolyze saturated brine in the electrolysis device to prepare ClO 2 gas;

[0031] 5) Send the effluent in step 3) into the gas-liquid mixer, and use the negative pressure generated in the gas-liquid mixer to remove the ClO prepared in step 4) 2 The gas is introduced into the gas-liquid mixer (ClO 2 The amount of gas introduced is 6mg / L water), and left at room temperature for 48 hours;

[0032] 6) F...

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Abstract

The combined sterilization alga-removal process to sewage by efficient oxidation process pertains to the chemical oxidation sterilization alga-removal field. The problems of secondary pollution, short inhibition aging, and the like, exist in the present chemical oxidation sterilization alga-removing process. In the process of the invention, ozone with high oxidation activity and chlorine dioxide are combined for sterilization and alga-removing, and the specific steps are that: ozone is passed into the water in suspense (the inlet amount of O3 is 2-10 mg/l water), after the water rests for 48 hours at room temperature and is stirred, then ClO2 gas (the inlet amount of ClO2 gas is 6-10 mg/l water) is passed into the water, after the water rests for 48 hours at room temperature, the qualified water is obtained by filtration. The process of the invention is simple, cost is low, the rate of sterilization alga-removal can reach up to 99%, left poison and second pollution do not exist, disinfection and sterilization alga-removal to the water used in aquaculture, recycling water, water used for townscape, oilfield injection water and hospital sewage terminal can be radically realized.

Description

technical field [0001] The invention belongs to the field of chemical oxidation method for sterilization and algae removal, and in particular relates to a combined ozone and chlorine dioxide sterilization and algae removal process, which is suitable for eliminating and inhibiting the reproduction of bacteria and algae in large-area polluted water bodies. Background technique [0002] Eutrophication of water body is one of the most important water pollution problems facing the world today. With the process of urbanization and the development of social economy, the water quality has deteriorated sharply, the degree of eutrophication has intensified, algae blooms have occurred frequently, and the functions of water bodies have been greatly damaged. The mass reproduction of algae has brought many adverse effects to production and life, so the research and development of effective and feasible algicidal technology is an urgent problem to be solved in our country. [0003] The ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/78C02F1/76C02F1/50
Inventor 周俊波赵红许虹
Owner BEIJING UNIV OF CHEM TECH
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