A method for removing phosphorus and controlling algae in medium eutrophic water body

Abstract

The invention discloses a phosphorous removal and alga control method for a medium eutrophication water body. The method comprises the steps: barricading; adding chemicals into the water body and stirring; dredging sediment; fixing phosphorous of sediment and the like. According to the method, kieselguhr and straw are applied to the phosphorous removal treatment of an eutrophication water body; the concentration of phosphorous in a lake and a reservoir is reduced gradually by removing the phosphorous from the water body and breaking the ratio of nitrogen to phosphorous in the water body; the phosphorus enrichment in the sediment is removed by dredging, and the release of the phosphorus in the sediment to the water body is lightened, so that the limited growing environment of the phosphorous is constructed to inhibit the growth of algae in the water body and reduce the frequency and intensity of algal bloom. Compared with the prior art, the phosphorous removal and alga control method adopts multi-stage adsorption precipitation and sediment dredging to reduce the phosphorous stage by stage; is simple in process, economical, effective and good in treatment effect, and is particularly suitable for phosphorous removal and alga control of a local water area of small and medium sized or large sized eutrophication water bodies at a medium eutrophication level; the condition of limited growing environment is constructed, and the water quality can be improved obviously.

Description

technical field [0001] The invention belongs to the technical field of resource and environment protection, and in particular relates to a method for removing phosphorus and controlling algae in medium-rich nutrient water. Background technique [0002] With the rapid development of the economy, a large amount of industrial wastewater and domestic sewage are discharged into surface water bodies such as rivers and lakes, and these wastewaters carry a large amount of nutrients. Due to the discharge of elements such as nitrogen and phosphorus, and the lack of necessary circulation in the water body, the rapid reproduction of algae and other plankton is caused, the dissolved oxygen in the water body decreases, the water quality deteriorates, and fish and other organisms die in large numbers, resulting in eutrophication of the water body. The in-situ treatment technologies used to control the growth of algae include various methods such as reducing the light on the water surface, ...

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