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Submerged ecological bed for purifying eutrophic waterbody and application thereof

A kind of eutrophication and ecological bed technology, applied in the field of lake water pollution control, can solve the problems of undeveloped and other problems, achieve the effects of low construction and operation costs, wide application range, and strong resistance to water flow impact

Inactive Publication Date: 2010-04-07
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Researchers at home and abroad have conducted extensive research on the eutrophication of lake water and developed a series of technologies. The water plant-aquatic microorganism system plays a role in the eutrophic water body. Submerged plants absorb water body nutrients-microbes anaerobically strengthen the denitrification process to denitrify and then transform-the device for removing water body nutrients has not yet been developed. Therefore, the development of such projects The device has positive significance for the treatment of eutrophic lake water

Method used

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  • Submerged ecological bed for purifying eutrophic waterbody and application thereof
  • Submerged ecological bed for purifying eutrophic waterbody and application thereof
  • Submerged ecological bed for purifying eutrophic waterbody and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In the pilot test, a 4m×4m×2.5m pool was used as the reaction vessel. Two pools of the same size are injected with 25m 3 Put the submerged ecological bed in the pool, its frame is made of ABS engineering plastics, the outside is fixed with steel wire, the size is 1.5m×1m×1m, the height of the microbial bed 4 is 0.2m, and two can be installed at each end Pull-out boxes, the size of each box is 0.5m×0.5m×0.2m, and the height of the submerged plant bed 3 is 0.8m. The submerged plant beds 3 of the two submerged ecological beds are all placed with 1 kg of Elodea, and the microbial bed 4 of one of the submerged ecological beds is placed with a 1.5 kg carrier, which is loaded with indigenous nitrogen cycle bacteria (comprising ammonifying bacteria, sub Nitrifying bacteria, nitrifying bacteria, and denitrifying bacteria), another one without any substance for comparison, and an aeration device 1 as a backup device (Xingde high-efficiency energy-saving microporous aeration syst...

Embodiment 2

[0040] Experiments were carried out in lakes. The pollution in the lake area mainly comes from non-point source pollution, such as fish farming and other sewage discharges and domestic sewage discharged by residents in the lake area.

[0041] The structure of the submerged ecological bed is made of ABS engineering plastics, and the outside is fixed with steel wires. The size is 4m×2m×1.5m. The size of the body is 1m×1m×0.2m, and the height of the submerged plant bed 3 is 1.3 meters. Since the water quality of the lake is not heavily polluted and does not affect the ecological restoration, the aeration device 1 (Xingde high-efficiency and energy-saving microporous aeration system XD-40) is a backup device. The submerged plant bed 3 randomly places Elodea, hornwort, black algae, and chrysanthemum (wet weight is 10kg in total), and the microbial bed 4 places 8-10kg of carriers loaded with indigenous nitrogen cycle bacteria (including ammonifying bacteria, nitrosifying bacteria, ...

Embodiment 3

[0044] An experiment was carried out in a river channel connecting Taihu Lake. The water quality was generally inferior to V category. The pollution characteristics were mainly nitrogen-containing nutrient salts and organic pollutants, and the dissolved oxygen content was low. Since the river channel is responsible for the shipping function, the submerged depth of the submerged ecological bed is required to be outside the range that affects shipping, and the channel entering the lake is generally narrow. Compared with the large lake surface, it is easier to maintain the submerged ecological bed. The buoyancy of this project is set Adjusting device 2 (Benthos2040 series glass float) and iron block anchoring device 6 change the submerged depth by adjusting the buoyancy. The submerged ecological bed of this project adopts a PVC structure with a size of 2m×1.5m×1.5m, of which the diameter of the bottom aeration pipe is 0.1m, the height of the microbial bed 4 is 0.2m, and two drawab...

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Abstract

The invention discloses a submerged ecological bed for purifying eutrophic waterbody and an application thereof, belonging to the technical field of water environmental pollution treatment. The submerged ecological bed mainly comprises a submerged plant bed, a microbe bed, a buoyancy regulating device and an anchoring device. The upper layer of the submerged ecological bed is submerged plant, and the lower layer thereof is microbe; the lower layer microbe bed is disassemble for increasing the microbe amount at any time; the submerged ecological bed is provided with the buoyancy regulating device for regulating submerge depth and combines with each bed body by the anchoring device at the bottom part thereof; a fine bubble aerator is arranged at the bottom part thereof for fine bubble aerating; the submerged plant at the upper layer of the submerged ecological bed can generate oxygen gas by photosynthesis to form an aerobic-anaerobic microenvironment near roots, thus being favor of converting nitrogen in waterbed into gases such as N2O, N2 and the like for overflowing and lowering nitrogen content in waterbody; in addition, the growth of the submerged plant can absorb a large number of nitrogen and phosphorus from the waterbody, thus playing an important role in lake waterbody restoration by using mutually beneficial symbiotic relationship of the two parts.

Description

technical field [0001] The invention relates to lake water environment pollution control technology, more specifically, a submerged ecological bed for purifying eutrophic water body and its application in the prevention and control of lake water environment pollution. Background technique [0002] With the rapid development of my country's economy and the acceleration of urban and rural construction, the pollution of lake water environment is becoming more and more serious, mainly manifested in the sharp decrease of water area, the aggravation of lake eutrophication, the damage of lake ecosystem, and the serious lake silting. The main reasons are as follows: : Pollution of lake water by industrial sewage, domestic sewage, and agricultural non-point source discharges along the lake; seine farming in the lake destroys the lake water ecosystem, and the bait put in accelerates the eutrophication of the lake; air pollution in the watershed around the lake is dry and wet Subsidence ...

Claims

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Application Information

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IPC IPC(8): C02F3/32C02F3/34
Inventor 李正魁陈祈春王月明吴凯石鲁娜冯露露
Owner NANJING UNIV
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