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Method for purifying water by using aquatic-floating-plant floating bed

A technology for floating plants and water purification, applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc. The effect of secondary pollution

Active Publication Date: 2014-11-05
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the natural state, when the temperature is lower than the frost point, the floating plants wither or die; and in the stormy area of ​​the lake, they are constantly damaged by the wind and waves, and they cannot survive the winter

Method used

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  • Method for purifying water by using aquatic-floating-plant floating bed
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  • Method for purifying water by using aquatic-floating-plant floating bed

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Experimental program
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Effect test

Embodiment 1

[0034] (1) Analysis of the main environmental factors affecting floating plants

[0035] Wind and waves have a major impact on the growth of floating plants, causing direct mechanical damage. If effective measures are not taken, it will be difficult for plants to grow in the wind and wave area of ​​the lake. Experiments have shown that the introduction of Litella philodendron into the enclosure, the coverage is 100%, and the cumulative loss reaches 60% in less than a month, which shows that it is not easy to restore floating plants in the stormy area of ​​the lake. This is due to the up-and-down motion of the waves, which causes the roots, stems and leaves of floating plants to move relative to each other and damage each other. In the natural state, the amount of damage is much greater than the amount of growth, so it is almost impossible to survive normally. There is no precedent for long-term successful cultivation. Therefore, reducing the impact of wind and waves is a prer...

Embodiment 2

[0050] Compared with Embodiment 1, the only difference is that in this embodiment, the floating bed with bamboo raft structure has a single length of 8m, and the interval between any two adjacent floating bed belts is 500m. The dominant species of floating plants on the floating bed of bamboo raft structure is Lithium philodendron, and its initial stocking density is 1.2kg / m 2 . The experimental results show that when the wind and waves are strong (wave height 0.57m), the wave penetration rate is 0.54, and the floating bed of floating plants can reduce the suspended solids content in the surface water by 14 mg / L; The content of suspended solids in the surface water decreased by 8 mg / L, and these results were significantly lower than in Example 1. Therefore, the length of the bamboo raft affects its wave-dissipating effect to a certain extent, and increasing the length of the floating bed can improve its wave-dissipating effect; moreover, the interval between the floating bed ...

Embodiment 3

[0052] Compared with Example 1, the difference lies in that the mesh of the net structure floating bed is 1 cm. The dominant species of floating plants is Eclipta philodendron, and its initial stocking density is 1.2kg / m 2 . The monitoring found that the growth of Lithuania philodendron dropped sharply, only half of that when the mesh was 2cm. On-site observations show that Aurantia chinensis is not easy to pass through the mesh, and its growth is greatly restricted. Therefore, too small a mesh is not suitable for the growth of Aurantia chinensis, and the optimal mesh is 2.3cm.

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Abstract

The invention belongs to the technical field of ecological restoration and relates to a technology for purifying water of large-wind-wave water areas by using an aquatic-floating-plant floating bed. The technology comprises the steps of adopting a structured floating bed, so as to improve environmental conditions, such as wind wave and transparency, lower the root-stem-leaf relative motion, mutual friction and drift among floating plants and construct habitat conditions suitable for the floating plants, carrying out child care on the floating plants, and exerting the pioneering effect of floating plant biocoenosis, so as to improve the water quality of lakes and provide favorable conditions for the resumption of submerged plants. According to the technology, network-structured floating beds made from special mesh bags and bamboo-rafted floating beds made from wave-dissipating bamboo rafts are taken as a carrier, so as to lower wind wave disturbance and drift caused by the wind wave disturbance and improve basic environmental conditions; dominant floating plants are screened through integrating the characteristics of water purification time, purification effect, wind wave resistance, easiness in maintenance and the like and are subjected to floating bed cultivation; for floating plant resumed water areas, hibernation protection and removal techniques are adopted, so as to prevent secondary pollution caused by plant residues.

Description

technical field [0001] The invention belongs to the technical field of ecological restoration, and relates to a method for purifying water quality by using a floating bed of aquatic floating plants in a stormy water area. Background technique [0002] The eutrophication of the water body leads to the lack of pollution of fresh water resources, the overall destruction of the water ecosystem, and the extinction of aquatic plants; while the improvement of the basic environmental conditions creates the necessary and suitable habitat for the recovery and conservation of aquatic higher plants, which is the basis for ecosystem restoration. and premise. [0003] According to the multi-stable theory of lakes, there are clear water systems (grass lakes) dominated by large aquatic higher plants and strong self-purification capabilities in lakes, and turbid water systems dominated by phytoplankton (algae lakes). To build a grass-type lake system, the environmental conditions must be im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
CPCY02W10/10
Inventor 秦伯强董百丽胡春华高光
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
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