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Method for preventing and controlling nitrogen and phosphorus non-point source pollution in farmland

A non-point source pollution, nitrogen and phosphorus technology, applied in the field of prevention and control of nitrogen and phosphorus non-point source pollution in farmland, can solve the problems of large area and poor removal effect of nitrogen and phosphorus elements, so as to reduce the use of chemical fertilizers and avoid large area The effect of spreading and reducing the emission of nitrogen and phosphorus

Inactive Publication Date: 2019-02-12
曲靖促创科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, domestic and foreign control technologies for farmland non-point source pollution mainly include vegetation buffer zone, ecological ditch, grass filter belt, constructed wetland, ecological pond, etc.; Pollution can obtain better nitrogen and phosphorus removal effect, but it occupies a large area, and it is difficult to further promote it in the case of limited land resources in our country. Although ecological ditches have also achieved some control effects on nitrogen and phosphorus emission reduction in water bodies, they have no effect on The removal effect of nitrogen and phosphorus elements is poor

Method used

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  • Method for preventing and controlling nitrogen and phosphorus non-point source pollution in farmland
  • Method for preventing and controlling nitrogen and phosphorus non-point source pollution in farmland
  • Method for preventing and controlling nitrogen and phosphorus non-point source pollution in farmland

Examples

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Embodiment 1

[0032] Such as Figure 1~3 As shown, the method for preventing and controlling farmland nitrogen and phosphorus non-point source pollution described in Example 1 includes the following prevention and control procedures:

[0033] ① Source control of farmland non-point source pollution:

[0034] When a field 1 is planting crops, use soil conditioner and chemical fertilizer to reduce the consumption of chemical fertilizer. The mass ratio of soil conditioner and chemical fertilizer per mu is 2:1. The preparation method of the soil conditioner is The biomass raw material particles with a percentage content of 20% are soaked in a 60% metal salt solution. After soaking for 10 hours, they are dried, dehydrated, and carbonized to obtain a soil conditioner. The carbonization is carried out in a tube furnace. Into nitrogen for atmosphere protection, the heating rate is 20°C / min, the carbonization temperature is 650°C, and the holding time is 1h. The biomass particles are pulverized wate...

Embodiment 2

[0045] Such as Figure 1~3 As shown, the method for preventing and controlling farmland nitrogen and phosphorus non-point source pollution described in Example 2 includes the following prevention and control procedures:

[0046] ① Source control of farmland non-point source pollution:

[0047]When a field 1 is planting crops, use soil conditioner and chemical fertilizer to reduce the consumption of chemical fertilizer. The mass ratio of soil conditioner and chemical fertilizer per mu is 2.5:1. The preparation method of described soil conditioner is to mix mass The biomass raw material particles with a percentage content of 30% are soaked in a 70% metal salt solution. After soaking for 15 hours, they are dried, dehydrated, and carbonized to obtain a soil conditioner. The carbonization is carried out in a tube furnace. Into nitrogen for atmosphere protection, the heating rate is 23°C / min, the carbonization temperature is 680°C, and the holding time is 1.5h. The biomass particle...

Embodiment 3

[0058] Such as Figure 1~3 As shown, the prevention and control method of farmland nitrogen and phosphorus non-point source pollution described in the present embodiment 3 includes the following prevention and control procedures:

[0059] ① Source control of farmland non-point source pollution:

[0060] When a field 1 is planting crops, use soil conditioner and chemical fertilizer to reduce the consumption of chemical fertilizer. The mass ratio of soil conditioner and chemical fertilizer per mu is 3:1. The preparation method of described soil conditioner is to mix mass Biomass raw material particles with a percentage content of 40% are soaked in 80% metal salt solution. After soaking for 20 hours, they are dried, dehydrated, and carbonized to obtain the soil conditioner. The carbonization is carried out in a tube furnace. Enter nitrogen for atmosphere protection, the heating rate is 25°C / min, the temperature of carbonization is 700°C, and the holding time is 2h. The biomass p...

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Abstract

The invention discloses a method for preventing and controlling nitrogen and phosphorus non-point source pollution in farmland. The method comprises the steps of control over a source of the farmlandnon-point source pollution, wherein the use amount of chemical fertilizer and chemical pesticide is reduced; 2, adoption of a farmland ditch interception system, wherein multiple longitudinal ditchesare excavated at equal intervals in the width direction of the farmland, multiple transverse ditches are excavated at equal intervals between every two adjacent longitudinal ditches, and bio-carbon layers, soil layers, bio-carbon layers and soil layers are sequentially laid in the longitudinal ditches and the transverse ditches respectively from top to bottom; 3, adoption of a farmland tail waterpurification interception system, wherein a water collection ditch communicated with the longitudinal ditches is formed in the ridge of the farmland, and a water purification device is arranged belowthe lower end of the water collection ditch and comprises a water collecting and sand setting tank, a hydrolysis acidification tank, an anaerobic sedimentation tank, an ecological purification tank and a clear water pool which are communicated with one another in sequence. According to the method, not only can residual nitrogen and phosphorus elements in the farmland be efficiently and quickly removed, but also discharge of nitrogen and phosphorus can be effectively controlled, and recycling of farmland drainage is achieved.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for preventing and controlling farmland nitrogen and phosphorus non-point source pollution. Background technique [0002] Farmland surface nitrogen and phosphorus source pollution mainly refers to various pollutants in farmland production activities, such as sediments, nutrients, pesticides, germs, etc., through runoff, leaching, and farmland drainage, etc., in the form of low concentrations and large areas. The pollution process that spreads from the pedosphere to the human circle. The formation of farmland nitrogen and phosphorus non-point source pollution is a comprehensive and complex process, including rainfall runoff process, soil erosion process, surface solute dissolution process and soil solute seepage process. These four processes are interrelated and interact. The process is affected by many factors such as soil, topography, rainf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/02A01C21/00
CPCA01B79/02A01C21/005
Inventor 不公告发明人
Owner 曲靖促创科技有限公司
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