Physical treatment method for directly adsorbing lake eutrophic water body by using natural zeolite powder

A natural zeolite, eutrophication technology, applied in adsorption water/sewage treatment, energy wastewater treatment, etc., can solve the problems of large investment, high maintenance cost, high cost, and achieve large exchange capacity, high capacity utilization rate, and low cost. Effect

Pending Publication Date: 2011-05-25
张媛洁
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Problems solved by technology

The cost of chemical treatment is high, and there are many residual chemical elements, so it is used in industrial production. Biological treatment, such as artificial wetlands, has remarkable purification effects, but it has huge investment, large area, and is affected by geographical features and winter and winter conditions in the north of the Yangtze River. The impact of freezing weather in early spring can not operate, and even in the southern winter after the death and decay of organisms, the maintenance cost is high, which affects and restricts the promotion and use of constructed wetlands
[0006] Physical treatment overcomes the shortcomings of the above two treatment methods. It has low treatment costs, is easy to construct, sav...

Method used

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Examples

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Effect test

example 1

[0017] Plateau hanging lakes, such as Qilu Lake in Tonghai County, Yunnan Province, have no natural large-scale water replenishment system and large-scale water leakage drainage system, and only rely on annual average rainfall to replenish water sources. One hundred million cubic meters, the lake is relatively calm. This type of lake is characterized by difficulty in replacing the polluted water body, the ecological state of the lake itself is fragile, and its self-repair ability has been reduced due to years of pollution. Based on the perimeter of the lake and the population concentration area adjacent to the lake, the heavily polluted area along the lake should be released with a powder of 200 mesh or more at 4 to 6 per thousand of the total amount of water in the area. For the relatively lightly polluted waters in the center of the lake, 0.5 to 3 / 1000 of the powder below 200 mesh is used in the total area.

example 2

[0019] Plain lakes, such as East Lake and its sub-lakes, Taihu Lake, and Chaohu Lake in Wuhan, which have a relatively serious degree of eutrophication, have natural large-scale water supply systems (regardless of pollution factors) and large-scale water leakage drainage systems to replace water bodies. The lake area is nearly One hundred or more than one hundred square kilometers, the water volume of the lake exceeds one billion cubic meters, and the lake water is relatively flowing. This kind of lake is characterized by relatively easy replacement of polluted water bodies. Although the lake itself is fragile, it still has the ability to repair itself. In the present invention, the natural zeolite powder of 80 mesh or more and 120 mesh or less is directly thrown into the lake water body, and the total amount thereof is controlled below 0.5 / 1000. During the flood discharge period of the rainy season, a large amount of water is discharged, and such particles with relatively larg...

example 3

[0021]Deep-water lakes, such as Fuxian Lake and Yangzonghai Lake in Yunnan, have deep and clear water, and the sediments on the bottom of the lake have not yet formed muddy form, and these lakes are typical controlled lakes. The ecosystem structure is extremely simple and fragile, and the water change cycle lasts for more than a hundred years. Once eutrophication occurs, it will not be cured. This type of lake is only controlled to prevent it from developing towards water body nutrition. For this type of deep-water lake, the present invention uses natural powder with a larger diameter of 40-70 mesh natural zeolite particles, and the total amount is controlled below one ten-thousandth to prevent its occurrence. Nutritious and control polluting elements.

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Abstract

The invention relates to a physical treatment method for directly adsorbing a lake eutrophic water body by using natural zeolite powder. The powder of 40 to 300 meshes or even less than 40 meshes is directly put into the lake eutrophic water body; the natural zeolite powder has capacity of adsorbing pollution elements and high exchange capacity, and directly adsorbs nitrogen, phosphorus, benzene, arsenic and other metal elements in the eutrophic water body; the effect of removing pollutants is better, the exchange capacity is highest and the capacity utilization rate is also highest when the particle size of the natural zeolite powder is smaller; and the powder of different particle sizes is adopted according to different types of lakes, and the characteristic that the effect is more obvious when specific surface area is larger is exerted. A practical method which saves time, labor and treatment cost, and is worthy of being selected by domestic pollution treatment enterprises, easy to implement and quick in response is provided for domestic lake eutrophication physical treatment.

Description

technical field [0001] The invention relates to a physical treatment method for natural zeolite powder to directly adsorb eutrophic water bodies in lakes Background technique [0002] Zeolite is the general term for non-metallic minerals of the zeolite group, including a series of hydrated calcium, sodium, barium, and potassium calcium silicate minerals. Zeolite is a natural and cheap mineral whose structure is a frame-like structure of aluminosilicate A salt crystal with many holes and channels inside. Zeolite has a huge specific surface area (400-800m 2 / g), and the balance cations on the zeolite framework are not tightly combined with the framework, so it is easy to exchange with the cations in water, so the zeolite has good adsorption and exchange performance. Due to different composition and origin, it can be divided into zeolite Na[ALSi 2 ]·H 2 O, calcium zeolite Ca[Al 2 Si 3 o 10 ]·H 2 O. Clinoptilolite, chabazite, sodium zeolite, stilbite and other dozens of ...

Claims

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Application Information

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IPC IPC(8): C02F1/28
CPCY02W10/37
Inventor 张玉明张媛洁
Owner 张媛洁
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