Method for treating eutrophication water body by hydrophyte

Abstract

This invention relates to a method for purifying eutrophic water body by using water plant, particularly duck-weed and polycultured with other water plants. The adsorption, absorbing and biochemical reaction of said water plants are used for removing nitrogen, phosphorus and other pollutants. The plants occupies 70-90% of the surface of the water body. This invention has advantages of: simple operation, low management cost, obvious treatment effect, no secondary pollution, the water plants can be harvested as resource, being of a popularized treatment method for eutrophic water body.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for treating eutrophic water bodies by utilizing aquatic plants, in particular to an aquatic plant treatment technology mainly based on duckweed, an aquatic floating plant. Background technique [0002] In recent years, due to the continuous growth of population and the rapid development of industry and agriculture, a large amount of nutrient-rich sewage is directly discharged into various water bodies without any treatment, resulting in accelerated eutrophication process. The eutrophication of lakes and reservoirs has become a prominent environmental problem in our country. [0003] Comprehensive approaches and countermeasures for the prevention and control of eutrophication in recent years can be summarized as: physical methods, chemical methods and biological / ecological methods. Compared with physical and chemical methods, the biological / ...

AI Technical Summary

Problems solved by technology

If the purification plants are not properly selected, not only can the eutrophic water body not be repaired, but also cause secondary pollution due to the crazy growth of plants

At present, the existing purification methods are roughly divided into two categories: one is to use large aquatic plants (water peanuts, water hyacinths, macroalgae, etc.) to purify nitrogen and phosphorus sewage. , it is difficult to remove it in time by simple mechanical methods, it takes a lot of manpower, and it is easy to stir the sediment during removal, so there is a problem of secondary pollution; and it is multi-fiber, low in nutritional value, poor in palatability, and has the risk of accumulating heavy metals, so it is difficult to be used as Animal feed can only be used as compost and biogas raw materials with low economic value, and cannot be truly recycled as a resource

[0005] Another method is to use small algae (chlorella, Scenedesmus, etc.) to purify nitrogen and phosphorus sewage, but because the volume of algae is too small, it is difficult to completely recover, so the effluent still contains a large amount of algae, and it is easy to cause secondary pollution after entering the natural water body