Sediment covered restoring method for eutrophic water

A repair method and eutrophication technology, applied in the field of environmental governance, to achieve the effects of strong operability, easy-to-obtain materials, and high practical value

Active Publication Date: 2008-06-18
常熟紫金知识产权服务有限公司
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  • Sediment covered restoring method for eutrophic water
  • Sediment covered restoring method for eutrophic water
  • Sediment covered restoring method for eutrophic water

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Embodiment 1

[0050] Example 1, referring to Figure 2, Kunming Dianchi Lake eutrophication water sediment masking restoration method, after field investigation and optimization, the selected field site for field restoration this time is in the adjacent lake pond close to the east bank of Dianchi Lake, located in Chenggong, Kunming City 1km west of Meizi Village, Dounan Town, County.

[0051] Method and process:

[0052] (1) Selection of masking materials:

[0053] The local red soil is preferred. The laterite was collected from the east side of the Songhuaba Reservoir area (25°07′N, 102°39′E) and Kunming Baini Mountain in Kunming City, Yunnan Province in October 2002 (refer to Figure 3-1, 3-2), all are natural weathered laterites without human disturbance. When sampling, grooves were carved down from the surface to a depth of 5m.

[0054] (2) Pretreatment of masking materials: After pulverizing and mixing, all samples are air-dried (water content is 3.5%), passed through 20 mesh, then fi...

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Abstract

The invention relates to a sediment shielding and remediation method of eutrophic water body, which adopts the following steps: 1. the selection of shielding materials: the shielding material adopts clay; 2. the pretreatment of shielding material and additive: after smashed, all are sieved by 300 meshes, after then dried for 3h at 200 DEG C, and placed in drier for standby; 3. the pretreated shielding material is added with appropriate additive; 4. the shielding material in the step 3 is directly applied into the lake water body; 5. the shielding effect is tested; 6. according to the test result in the step 5, the amount of the shielding material is adjusted and the types or amounts of the additive is adjusted. Compared with the prior art, the invention has essential difference. In the invention suitable time is selected, the laterite and auxiliary materials are directly applied into the lake water body. Nitrogen, phosphor and other nutritious salts in the water body can be removed, simultaneously a layer of film is formed on the surface of the sediment so as to block the release of nitrogen, phosphor and other nutritious salts in the sediment and the floating and breeding of algae biology, thereby reaching the purpose of treatment.

Description

technical field [0001] The application relates to an environmental treatment method, in particular to a method for covering and repairing eutrophic water bottom mud. The invention is based on the national key laboratory key project "Comprehensive investigation and research on water and soil resources and ecological environment in Dianchi Lake Basin" (No. 005301), the National Natural Science Foundation of China project "Isotope Tracing Research on Soil Erosion and Sediment Sources in Dianchi Lake Basin" ( No.: 40473052) and Yunnan Provincial Environmental Protection Bureau Science and Technology Development Plan Project "Research on Algae Removal Technology Principle and Application Devices of Dianchi Lake Cyanobacteria Dormant Period" for research. Background technique [0002] With the rapid development of industry and agriculture and the acceleration of urbanization and development activities, the total discharge of industrial and agricultural production wastewater and ur...

Claims

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Application Information

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IPC IPC(8): C02F1/00E02B3/02
Inventor 杨浩
Owner 常熟紫金知识产权服务有限公司
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