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Method for purifying eutrophication water body

A technology of eutrophication and water body, applied in the field of water treatment, it can solve the problems of large bubble size, high power consumption and wide area.

Inactive Publication Date: 2008-03-12
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The air bubbles produced by the microporous air distribution method are relatively large in size, generally larger than several hundred microns or even more than 1 mm, resulting in low efficiency of dissolved air, and algae cannot be well removed by air flotation
Pressurized air distribution requires pressurized equipment, and an air flotation tank needs to be built in the treatment plant, and it is equipped with dosing equipment, high-pressure air flotation equipment, etc., which has a large area, large investment costs, and high power consumption. Easy to corrode, the processing method is not flexible enough, etc.

Method used

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  • Method for purifying eutrophication water body

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Effect test

Embodiment 1

[0012] Fig. 1 is a schematic diagram of the method for purifying eutrophic water body of the present invention. In the polluted pool 1, select a place with poor circulation and easy to form stagnant water, and set the ejection port 3 of the microbubble generator 2 near the bottom of the pool. In order to promote the diffusion of microbubbles, the water intake 4 of the microbubble generating device 2 is deviated from the outlet 3, and a bioreactor 5 equipped with spiral packing is arranged near the outlet 3. Figure 2 is a schematic diagram of a bioreactor equipped with spiral packing. A mixture of nitrifying bacteria, nitrosifying bacteria and denitrifying bacteria is attached to the filler.

Embodiment 2

[0014] For a pool 1 with an area of ​​about 5m x 20m and a water depth of 2m, a microbubble generating device 2 is used for purification. After the device 2 started to operate, it was confirmed that milky white microbubbles could be seen to diffuse in a mist form from the discharge port 3, and a bioreactor 5 containing microorganisms such as nitrifying bacteria, nitrosifying bacteria and denitrifying bacteria was installed near the discharge port 3. After the microbubble generating device 2 starts to operate, invisible microorganisms flow out from the bioreactor 5, are captured at the interface of the microbubbles, and spread to the whole pond. Microorganisms and microbubbles are adsorbed when they encounter algae and suspended matter, and gather to form flocs that cover the entire water surface. Since the algae and suspended solids in the water are physically removed and biodegraded as flocs, the water transparency of the pool 1 is greatly improved.

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Abstract

A method to purify eutrophication water body mainly purifies the eutrophication water body through the combination technics of micro-bubble air flotation and biological contact oxidation. The present invention is characterized in that micro-bubbles with a diameter in the range of 80 nm to 500Mu m which can stay 2 to 10 minutes in the water body are injected in more closed water bodies like lakes and pools and an organism reactor provided with helix fillers is arranged at the exits of the micro-bubbles. As the organism reactor contains a mixed mycelium of nitrosomona, nitrosobacteria and denitrifying bacteria, the present invention can not only play a role of decontamination and denitriding, the micro-bubbles can be able to be carriers of microorganisms that can lead the mixed mycelium to float to the surface. Simultaneously, the present invention takes a floccule formed of algaes, suspension corpuscles and water-solubility pollutants adhered on the micro-bubbles as the nutrient source to degrade the pollutants in water, thereby reaching the goal of purifying the water body with high efficiency.

Description

Technical field: [0001] The invention belongs to the technical field of water treatment, and relates to a method and a device for purifying eutrophic water body through a combination process of micro-bubble air flotation and biological contact oxidation. Background technique: [0002] Eutrophication is a phenomenon of water body aging, which usually refers to the phenomenon of water quality pollution caused by excessive nitrogen, phosphorus and other plant nutrients in relatively closed water bodies such as lakes and ponds. Due to the enrichment of nutrients such as nitrogen and phosphorus in the water body, some characteristic algae (mainly blue-green algae, green algae) and other plankton will multiply rapidly, the production capacity of the water body will increase, and the dissolved oxygen content in the water body will decrease, resulting in algae, planktonic Water quality deterioration and pollution in which organisms, plants, aquatic organisms and fish decline or even...

Claims

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Application Information

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IPC IPC(8): C02F1/24C02F3/08
CPCY02W10/10
Inventor 汪群慧黄培坤滕树兵侯文华隋克俭菊池隆重石原和美
Owner UNIV OF SCI & TECH BEIJING
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