Nitrogen phosphor interception undercurrent dam

An undercurrent, nitrogen and phosphorus technology, applied in water/sludge/sewage treatment, application, biological water/sewage treatment, etc., can solve the problems of non-operation, waste of construction funds, expensive treatment and maintenance costs, etc.

Inactive Publication Date: 2012-06-27
AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the high cost of treatment and maintenance, the existing sewage treatment plants are often in the state of intermittent operation or no operation at all, resulting in the waste of a large amount of construction funds and the deterioration of environmental pollution
In addition

Method used

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  • Nitrogen phosphor interception undercurrent dam
  • Nitrogen phosphor interception undercurrent dam

Examples

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Embodiment Construction

[0022] A kind of nitrogen and phosphorus intercepting subsurface flow dam, its width is according to the structure of farmland drainage ditches or surface flow constructed wetland, length 4-8m, height 70-90cm, permeable walls on both sides are determined according to the height of nitrogen and phosphorus intercepting subsurface flow dam, thickness is 40cm, by The porous bricks are interlaced, and the inside of the permeable wall is filled with a layer of large-size gravel (cobblestones, broken bricks, slag, etc.) near the water inlet, and then the gravel particle size is gradually reduced to fill until the other side of the permeable wall. The filling height of the gravel layer is 40-50cm, and a soil layer of 30-40cm high is covered on the gravel layer, and evergreen shrubs are planted on the soil, such as holly, euonymus, privet, berberis, boxwood, heather and other shrubs, and evergreen lawns Such as perennial ryegrass, tall fescue, bluegrass, small crown flower and so on.

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Abstract

The invention relates to an undercurrent dam which is applied in a farmland ecological trench to intercept substances such as nitrogen, phosphor and the like. According to the invention, water permeable walls are arranged at the two sides. A gravel filter layer is arranged in the middle of the water permeable walls. A soil cover layer is disposed over the gravel filter layer. A vegetable system is planted on the soil cover layer. The undercurrent dam can be placed in a farmland drainage channel and a surface flow wetland. In the surface flow wetland system, when sewage flows through the undercurrent dam, hydraulic retention time can be effectively increased; in addition, due to the arrangement of the gravel filter layer, suspending pollutants in the water body can be settled and absorbed, and plants on the undercurrent dam can effectively absorb eutrophicated pollutants such as nitrogen, phosphor and the like in the water body. Finally, sewage treatment effect of a common surface flow wetland is increased.

Description

technical field [0001] The invention relates to a nitrogen and phosphorus intercepting undercurrent dam, in particular to a nitrogen and phosphorus intercepting undercurrent dam applied to farmland ecological ditches to intercept nitrogen, phosphorus and other substances. Background technique [0002] The seasonal utilization rate of chemical fertilizers in my country is low (34.2%), especially the utilization rate of nitrogen fertilizer is only 30%-35%, which is 10-20 percentage points lower than that of developed countries. However, the problem of environmental pollution caused by increasing fertilizer input has become increasingly prominent. This agricultural production model based on high chemical fertilizer input has also directly accelerated the consumption of important natural resources. [0003] With the use of high-intensity agrochemicals, the loss of nitrogen, phosphorus and other pollutants in farmland has become an important factor causing water eutrophication. ...

Claims

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Application Information

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IPC IPC(8): C02F3/32E02B13/00
CPCY02W10/10
Inventor 杨殿林赵建宁张贵龙秦伟宋晓龙
Owner AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI
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