Method for hamessing eutrophication of water body and bred hyacinth

Abstract

A method for controlling the the ultrophication of water body and eliminating the water hyacinth features that a remotely controlled ship with the cutting blades installed to a rotating axle is used to shear the water hyacinth for making it become broken pieces, and the hydrophilic resin blocks with ion exchange function and mesh structure is used on the water surface for planting land plants to absorb the nutrients (N, P, etc) from water.

Description

technical field [0001] The invention relates to a method for controlling water body pollution, in particular to a method for controlling water body eutrophication and the water hyacinth it breeds. technical background [0002] Water hyacinth (Eichhornia crassipes Solm.), also known as Eichhornia crassipes Solm., is a perennial floating aquatic plant of the genus Eichhornia crassipes in the family Eichhornia. It was introduced into my country from South America as an ornamental plant in the last century, and later it was widely introduced all over the country as a feed crop for pigs and other livestock, but it was no longer used as a feed crop for various reasons and was discarded in various waters. The reproductive ability of water hyacinth is extremely strong, but its growth rate is limited in oligotrophic water bodies, and it will not pose harm to the water bodies; however, its growth rate in eutrophic water bodies is very surprising, especially because it is an introduced...

AI Technical Summary

Problems solved by technology

[0018] (4) Untreated sewage from livestock farms: it contains high amounts of nitrogen and phosphorus;

[0023] (2) Sewage treatment: This is the most fundamental method to prevent the water body from developing into eutrophic water body, but it can only prevent the water body from being polluted again, and it is basically ineffective for the already formed eutrophic state.

This method has a good effect on the treatment of limited water bodies, but it is powerless for such open and huge water bodies as rivers, lakes and reservoirs.

[0025] (4) Aquatic plant method: plant aquatic plants in eutrophic water bodies, such as emergent plants, floating leaf plants, submerged plants, etc., wherein emergent plants and floating leaf plants are generally planted in the shallow water area on the bank of the water body, and Submerged plants can also be planted in deeper waters, but they have little effect due to weak light

But this method has a fatal weakness - when algal blooms or red tides occur in eutrophic water bodies, these aquatic animals themselves will face extinction!

[0027] (6) Planting method on water: Chinese patent CN1031482C discloses a method for planting plants on water, which is actually a kind of soilless cultivation (hydroponics) without substrate. Because it does not need substrate, it simply wraps plants with sponge If the roots are placed on the surface of the water, the plants will grow poorly and need to be fertilized. However, fertilization in eutrophic water bodies will not control eutrophication, but will aggravate eutrophication.

[0028] Japan is a country with a very developed economy and technology, but it uses various current technologies to control the country's eutrophic Lake Biwa (an area of ​​about 600KM 2 ), it took 25 years and a total cost of about 18.5 billion U.S. dollars (about 150 billion yuan) to restore its water quality to Class IV standards; my country's Dianchi Lake (area 297KM 2 ) governance, so far more than 4 billion yuan has been invested, but there is still little effect. Facing the disappointed eyes and various doubts of the world, its governance time has been extended to 2030, and the predicted cost will reach 75 billion yuan ("China Environment News" 2001- 8-13 version 4)

It can be seen that the application of current technology to control water eutrophication will take a long time and cost a lot

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