Method for cleaning out blue algae of water area

Abstract

The present invention relates to method of eliminating blue-green algae in lake and city landscape water area, and solves the technological problems of eliminating blue-green algae from water area, recovering and utilizing algae, and controlling blue-green algae growth to transfer nitrogen and phosphate in water in high efficiency and low cost. The technological scheme of the present invention is to spray water purifying agent with the stirrer running in the blue-green algae growing water and features that the water purifying agent consists of three kinds of flocculants, including bentonite, aluminum chloride polymer and cation type polyacrylamide. The floated flocculated matter is fished, dewatered and fermented into organic fertilizer, and the filtered out water is returned to the water area.

Description

Technical field: [0001] The invention relates to a water environment protection method, in particular to a method for removing cyanobacteria from natural lakes and urban landscape waters. Background technique [0002] The eutrophication of the water body leads to a large number of blue-green algae blooms, and the death and decay of the blue-green algae releases toxins and produces stench, which will affect the water quality and cause human and animal poisoning. Since the 1990s, lakes in natural waters of my country, park lakes in urban landscape waters, and artificial lakes in residential quarters have caused blue-green algae outbreaks due to eutrophication of water bodies, seriously polluting water quality. Some natural lakes have seriously affected industrial and agricultural production, drinking water and tourism due to algal blooms. Although the country has invested huge sums of money in governance, the effect is not satisfactory. In addition, varying degrees of blue-g...

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Problems solved by technology

[0007] The present invention uses bentonite, polyaluminum chloride, and polyacrylamide as a water purifying agent compounded by three flocculants. At the same time, bentonite and polyaluminum chloride are dissolved and mixed and then sprayed with polyacrylamide respectively, which can generate a large amount of water on the water surface. The large and relatively solid floating cyanobacteria flocs create a compatible opportunity for spraying water purifiers and surface net fishing methods. The more cyanobacteria, the better the flocculation effect. Due to the improvement of water surface net fishing conditions, it is beneficial to adopt the method of direct net fishing Improve the efficiency of net fishing; and the cost of the water purifier used is low, and the cost of the water purifier consumed by the concentrated cyanobacteria water body is 0.30 yuan / m 3 Compared with the commonly used water purifier, the cost is saved by nearly half; the cleared algae residue can be recycled and fermented into organic fertilizer, which can be used for flower fertilization and turn waste into treasure to avoid secondary pollution of cyanobacteria; this method adopts the method of gradual removal, and the actual The above is to continuously transfer nitrogen and phosphorus in the water body through cyanobacteria, gradually reduce until the outbreak of cyanobacteria is controlled, and fundamentally solve the problem of eutrophication in the water body to achieve the purpose of clearing the water quality

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