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A method for water ecological environment protection based on aquatic plant harvesting

A technology for aquatic plants and environmental protection, applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc., can solve problems such as aggravating eutrophication of water bodies, decay, and reduction of transmitted light, so as to prevent madness Growth and occurrence of algae blooms, good and stable water quality, promotion of sedimentation to the bottom of the lake

Inactive Publication Date: 2016-11-16
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, it should be noted that in eutrophic water bodies, aquatic plants tend to grow in large numbers under suitable conditions, spreading across the entire water surface, reducing the transmitted light and dissolved oxygen in the water.
Moreover, the inter- and intra-species competition of aquatic plants causes the death and decay of the plants and deteriorates the water quality.
In addition, after the growth period ends, a large number of aquatic plants will die, and the nutrients absorbed and assimilated during the growth period will be released back into the water body, causing re-pollution and aggravating the degree of eutrophication of the water body.

Method used

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  • A method for water ecological environment protection based on aquatic plant harvesting
  • A method for water ecological environment protection based on aquatic plant harvesting
  • A method for water ecological environment protection based on aquatic plant harvesting

Examples

Experimental program
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Effect test

Embodiment 1

[0015] Embodiment one reed harvesting experiment

[0016] A 2m×3m quadrat was set up near the Yulinglong Waters of Yuanmingyuan, Beijing (N 40°00′31″, E 116°18′34″) to conduct harvesting experiments of emergent plants Reed, labeled N1, N2, N3, S1 , S2, S3. The first harvest was carried out on May 14, 2011. N1, N2, and N3 were harvested at a height of 40 cm on the water surface, and S1, S2, and S3 were harvested at the water surface. The harvesting situation is shown in Table 1.

[0017] Table 1 The first harvest of reed

[0018]

[0019] Two weeks after harvesting, due to the higher harvesting heights of N1, N2, and N3, new shoots appeared from the stem nodes in each plot, and each plant had 2-3 new shoots; S1, S2, and S3 each had 1-2 shoots New shoots.

[0020] Two months apart, that is, on July 18, 2011, the sample plots S3 and N3 were harvested for the second time. The harvest height was the same as that of the first harvest. The control sample plot 1 was the reeds ar...

Embodiment 2

[0029] Embodiment two submerged plants harvest experiment

[0030] Harvesting experiments of submerged plants were carried out in the Yulinglong water area of ​​Beijing Yuanmingyuan and nearby water areas, and the water quality was tracked and monitored. When the submerged plants in Yulinglong waters grow over the water surface, harvest them and set up sampling points to monitor the water quality; set up sampling points at the water inlet of Yulinglong waters, and the submerged plants in this part of the waters will not be harvested; in Yulinglong A control point was set up in the nearby waters of the water area, and there were almost no submerged plants growing in this part of the waters. Water samples are collected every half month, and monitoring indicators include: temperature, pH, dissolved oxygen (DO), chemical oxygen demand (COD), total phosphorus (TP), phosphate, total nitrogen (TN), nitrate nitrogen, ammonia nitrogen . The annual average COD, TP, TN, and DO contents...

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Abstract

A water eco-environment protection method based on water plant harvesting. The invention relates to a water eco-environment protection method, which is characterized in that water plants are cultivated in a water body or naturally recovered water plants are utilized; nitrogen and phosphorous nutrients are absorbed by water plant growth; the water plants are harvested in growth period by manual work or waterweed harvesting equipment so as to promote the regrowth of the water plants; harvesting is carried out for multiple times, ends in the growth period and is carried out for the last time after the water plants grow seeds or vegetative propagule so as to extract the nitrogen and phosphorus nutrients from water in the form of water plant residues. The invention aims to maximize the accumulated biomass of the water plants during the whole growth period or optimize the water quality purifying effect and simultaneously remove nutrients in the water body and deposits, alleviate the eutrophication process of the water body and prevent the water plants from decaying and polluting the water body once again. The method provided by the invention is suitable for daily ecological maintenance of shallow lakes, urban landscape water, slow flow rivers, small reservoirs, wetlands and ponds.

Description

technical field [0001] The invention relates to a water ecological environment protection method, in particular to an ecological maintenance method that utilizes artificial or aquatic plant harvesting equipment to harvest aquatic plants during the growth period to remove nutrient salts in lakes, maintain lake landscapes and stabilize water quality, and is suitable for shallow water lakes , Daily ecological maintenance of urban landscape water bodies, slow-flowing rivers, small reservoirs, wetlands, and ponds. Background technique [0002] In recent years, eutrophication has become one of the increasingly serious problems in the lake ecosystem. The main reason is that a large amount of inorganic nutrients such as nitrogen and phosphorus required by organisms are input into the lake, which causes algae and other plankton to multiply rapidly, and the dissolved oxygen in the water body decreases. deterioration, and even cause a large number of fish and other organisms to die. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/32
CPCY02W10/10
Inventor 陈灏姜义帅姜鲁
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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