Treatment system for treating eutrophic water body by duckweed
A technology of eutrophication and treatment system, applied in biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc.
Inactive Publication Date: 2013-03-06
GUANGXI ACAD OF SCI
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Problems solved by technology
These methods are mainly aimed at large natural water bodies that have been polluted, and solve the problem of eutrophication in the water body, which has certain limitations.
Method used
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[0016] The implementation of the present invention will be described below.
[0017] 1. Build the infrastructure required for water injection and purifier to collect drainage according to the attached drawings.
[0018] 2. Inject a certain amount of water and plant duckweed in the purification unit. When duckweed covers 1 / 2 of the water surface, the treatment of eutrophic water can be carried out.
[0019] 3 Eutrophication water is injected through the water injection unit. The control of the flow rate and velocity is based on the fact that the duckweeds on the water can remain relatively still and there is still a certain gap between the duckweeds. This can achieve the best processing effect.
[0020] 4. The water slowly passes through the duckweed area, and flows into the collection and discharge unit from the surrounding mesh holes to complete the whole process of water treatment.
[0021] 5. When the density of duckweed is too high and overlaps each other, harvest a ce...
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The invention provides a treatment system for treating eutrophic water body by duckweed, which is mainly used for removing nutrient elements such as nitrogen, phosphorus and the like in water body. The system comprises three parts: a water injection unit (1, 2, 3), a duckweed purification unit (4, 5, 6), and a collection draining unit (7). The duckweed purification unit is round, and is closely connected with the lower collection draining unit at the periphery; the water injection unit is located at the center of the duckweed purification unit. Eutrophic water is directly injected into a duckweed effective purification area, flows to the periphery from the circle center along a radial direction with a slow flow speed, and is purified through absorption and adsorption by the duckweed; therefore, nutrient elements such as nitrogen, phosphorus and the like as well as some other pollutants are removed from the eutrophic water body. The purified water flows into the collection draining unit through a screen mesh. The method can thoroughly remove nutrient elements such as nitrogen, phosphorus and the like, has no secondary pollution problem, is simple in operation, and low in operation cost; the gained duckweed can be used as forage and raw materials for energy production.
Description
technical field [0001] The invention relates to a biological treatment system for treating eutrophic water bodies, more specifically, the invention relates to a biological treatment system for removing nitrogen, phosphorus and other nutrient elements in water bodies by using duckweed. Background technique [0002] At present, the sewage and wastewater discharged from people's daily life, some factories, farms, etc. are often rich in nutrients such as nitrogen and phosphorus. The discharge of these sewage and wastewater into the natural environment will cause eutrophication of natural water bodies and excessive algal blooms. Water blooms occur due to reproduction, such as Taihu Lake, Chaohu Lake, etc. are typical examples, which eventually affect the stability of the entire water ecosystem and bring huge losses to human production and life. The denutrient treatment of sewage wastewater has become a very urgent problem. [0003] In the treatment of wastewater and sewage, biol...
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Inventor 王溪森黄日波黎贞崇陈东师德强张红岩莫祺晖
Owner GUANGXI ACAD OF SCI