Method for purifying eutrophic water in ecological agriculture

An ecological agriculture and eutrophication technology, applied in chemical instruments and methods, agriculture, agricultural fishing, etc., can solve the problems of high eutrophication in rivers and lakes, achieve strong adaptability, miscellaneous food habits, and avoid spreading disasters Effect

Inactive Publication Date: 2014-08-13
SHANGHAI XINTAO NEW ENERGY TECH DEVCO
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Problems solved by technology

[0004] In order to overcome the disadvantages that N and P in the water discharged from sewage treatment often still exceed the standard, and the degree of eutroph

Method used

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  • Method for purifying eutrophic water in ecological agriculture
  • Method for purifying eutrophic water in ecological agriculture

Examples

Experimental program
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Example Embodiment

[0027] The specific implementation method is as follows:

[0028] Several net cages with a length of 10 meters, a width of 6.7 meters and a height of 0.8 meters were made, and three triangular net rafts with a length of 9 meters, a width of 1.9 meters and a height of 0.5 meters were arranged in the middle of each net cage. The submerged plant Hydrilla rosenbergii is planted at the bottom of the cage, and its area is 25-35% of the area under the raft. Shrimp nests are installed on the upper, middle and lower positions of the raft. The number of shrimp nests is equal to the number of crayfish. Place the net cage In the sewage, the top of the net raft is 2-5cm higher than the water surface; water hyacinth is placed in the net raft, and the area occupied by the water hyacinth is 30-60% of the net cage area, and there is still a small amount of duckweed on the water surface. The area is 1-2% of the net cage area. Emergent plants are planted between the net rafts, which are convenie...

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Abstract

The invention relates to a method for purifying eutrophic water in ecological agriculture. According to the method, a plurality of net cages are put in an eutrophic water body, each net cage is provided with three net rafts in the middle, and 0.5m wide areas for oxygenating and growing small insects like mosquitoes are arranged around the net rafts; floating plants resisting eutrophic water are planted on the water surface of the net rafts, submerged plants resisting eutrophic water are planted at the bottoms of the net cages, emergent aquatic plants resisting eutrophic water are planted in the middle of the net rafts, animals resisting eutrophic water are raised in the water, under the irradiation of the sun, the aquatic plants absorb organic matters like nitrogen and phosphorus in the eutrophic water to grow, and give off oxygen, and the aquatic animals are fed on the aquatic plants; the floating plants, the submerged plants and the emergent aquatic plants are planted according to a certain proportion, the aquatic animals are raised, and people can catch the aquatic animals in the net cages at regular intervals to cook; an ecological balance of system of eutrophic water and sunshine-aquatic plant-aquatic animal-food of people is formed, one or two aquatic plants or animals are prevented from overgrowing, and the eutrophic water is purified.

Description

technical field [0001] The invention relates to an ecological purification technology of nutrient-rich water such as rivers and lakes, namely a method for purifying nutrient-rich water in ecological agriculture. Background technique [0002] Ecological agriculture is a modern agriculture that is established in accordance with the principles of ecology and economics, using modern scientific and technological achievements and modern management methods, as well as the effective experience of traditional agriculture, and can obtain high economic, ecological and social benefits. Ecological agriculture utilizes the essence of traditional agriculture and modern scientific and technological achievements to form two virtuous circles in ecology and economy through artificial design of ecological engineering, coordination between development and the environment, and contradictions between resource utilization and protection. Unification of great benefits. According to incomplete stati...

Claims

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Application Information

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IPC IPC(8): C02F3/32A01G31/00A01G33/00A01K61/00
CPCY02A40/81Y02P60/60Y02W10/10Y02W10/37
Inventor 王祖连
Owner SHANGHAI XINTAO NEW ENERGY TECH DEVCO
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