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

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, shortinhibition 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 qualifiedwater 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...

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.

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