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Method for fast repairing submerged vegetation by using water quality improvement clearance

A technology for water quality improvement and submerged vegetation, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve nutrient release, aquatic plant death, and affect aquatic plant photosynthesis, etc. question

Inactive Publication Date: 2008-08-06
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, after the modified local soil algae removal technology is implemented, the water quality improvement has a time effect, that is, the water quality is improved for a period of time, and then due to the decay and decomposition of the settled algae cells, the nutrients are released, and the increase in the nutrient content of the water body will lead to a large number of The growth of attached organisms will affect the photosynthesis of aquatic plants, inhibit their growth, and lead to the death of aquatic plants in severe cases

Method used

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  • Method for fast repairing submerged vegetation by using water quality improvement clearance
  • Method for fast repairing submerged vegetation by using water quality improvement clearance

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Experimental program
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Embodiment 1

[0020] In this embodiment, the chlorophyll-a content of the water body is 0.2mg / L, and the algae concentration converted into: 3×10 9 cells / L, the pH of the water body is 8.2, the algal cell aggregates are relatively large, and they float to the water surface, and the volume of the lake is 1m 3 , the local clean soil is the unsoaked soil on the shore of the lake, which is sieved through a 3mm×3mm sieve for use. The chitosan is food-grade chitosan produced by Jinan Haidebei Biological Company. The dosage of the modified local soil is 43mg / L (3mg / L chitosan, 40mg / L local clean soil), and the algae removal rate reaches 90% after 24 hours. 76NTU decreased to 8NTU, the transparency increased by 80cm, TN decreased from 6.2mg / L to 2.3mg / L, TP decreased from 0.27mg / L to 0.07mg / L, and the oxygen concentration at the water-sediment interface increased by 2mg / L, the water body environment is improved after algae removal, and there is no major change in water quality in 15 days of conti...

Embodiment 4

[0022] In this example, the chlorophyll-a content of the water body is 0.4 mg / L, which is converted into algae concentration: 4.3×10 9 cells / L, the pH of the water body is 8.3, the algal cell aggregates are relatively large, and they float to the water surface, and the volume of the lake is 1m 3 , the local clean soil is the unsoaked soil on the shore of the lake, which is sieved through a 3mm×3mm sieve for use. The chitosan is food-grade chitosan produced by Jinan Haidebei Biological Company. The dosage of the modified local soil is 50mg / L (2mg / L chitosan, 48mg / L local clean soil), and the algae removal rate reaches 90% after 24 hours. The 46NTU of the algae dropped to 9NTU, the transparency increased by 70cm, the TN dropped from the original 10.23mg / L to 4.03mg / L, and the TP dropped from the original 0.28mg / L to 0.08mg / L. During the 30 days of continuous monitoring, there was no major change in water quality, resulting in gaps in water quality improvement (Figure 3). Accor...

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Abstract

The invention provides a method for rapidly repairing settled plants by utilizing a water quality improvement clearance, particularly, by utilizing an algae removal technique of modified local earth to remove water bloom, decrease the concentration of nitrogen and phosphate in water, increase the water transparency, improve water quality of the eutrophic lake in a short term, and produce the water quality improvement. According to different extents of water quality improvement, various aquatic plant seeds or seeds treated with different methods and the products thereof are selected; the settled plants can rapidly grow in the water quality improvement, thus finally reaching a target of recovering the settled plants in the eutrophic lake. The technique can be used for ecologically recovering the settled plants in eutrophic lakes, rivers and landscape waters.

Description

Technical field: [0001] The invention relates to a method for quickly repairing submerged vegetation by utilizing the water quality improvement gap. The invention belongs to the technical field of eutrophic lake ecological restoration. Background technique: [0002] Eutrophication of lakes has become a major global water environment problem. In 2007, a lake algal bloom disaster broke out in China. Algal blooms deteriorate water quality and destroy ecology, and the release of algal toxins indirectly or directly threatens human health and safety. [0003] Ecological restoration is currently one of the main means to control eutrophic lakes. Among the disclosed phytoremediation methods about eutrophic water bodies, there are about the selective combination method of aquatic vegetation (CN1602657A, CN 1590319A), about the planting method of aquatic plants (CN1480411), and there are introductions that can improve the transparency of eutrophic water bodies. The method of pioneer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
Inventor 潘纲张木兰田秉晖杨波李垒
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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