Method for reducing nitrogen and phosphorus in eutrophic water body

Abstract

The embodiment of the invention discloses a method for reducing nitrogen and phosphorus in a eutrophic water body. According to the method disclosed by the embodiment of the invention, daces, chubs, crucians and weevers in an appropriate proportion are put in the water body which is rich in the nitrogen and the phosphorus according to different feeding habits of the fishes, the number of fish fries in the water body is controlled, the content of the nitrogen and the phosphorus in the eutrophic water body are reduced, the eutrophication problem of the water body is solved, a mass of human and material resources are not needed, and the labor intensity and the economic cost are reduced; an additive does not need to be added; secondary pollution on the water body cannot be caused, and not only is the eutrophication problem of the water body solved, but also a certain economic benefit can also be increased; the period of reducing the content of the nitrogen and the phosphorus in the water body is short, the effect is good, and the application range of the method is wide.

Description

technical field [0001] The invention relates to the technical field of water body ecological restoration methods, in particular to a method for reducing nitrogen and phosphorus in eutrophic water bodies. Background technique [0002] Eutrophication is a water pollution phenomenon caused by excessive plant nutrients such as nitrogen and phosphorus. After the eutrophication of the water body, phytoplankton, especially algae, will multiply in large numbers, which will change the population and species of biomass in the water body and destroy the ecological balance of the water body. In related technologies, the problem of eutrophication is mainly solved by increasing the oxygen content of water to make anaerobic bacteria die in an oxygen-enriched environment, such as sediment dredging, water diversion flushing, mechanical aeration and other physical methods. [0003] However, the inventors found that the method of dredging the bottom mud, diverting water for flushing or mechan...

AI Technical Summary

Problems solved by technology

[0003] However, the inventors found that the method of dredging the bottom mud, diverting water for flushing or mechanical aeration requires a lot of manpower and material resources, and the amount of engineering is relatively large, resulting in high cost of sewage treatment.