Treatment method of farmland wastewater

A treatment method and technology for wastewater, applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. Environmental and economic benefits, low one-time investment, and simple equipment

Inactive Publication Date: 2015-12-02
云南省环境科学研究院(中国昆明高原湖泊国际研究中心)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the device can effectively treat farmland wastewater, the device is small in size, difficult to expand the scale of treatment, and is prone to clogging, requiring frequent replacement of charcoal

Method used

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  • Treatment method of farmland wastewater
  • Treatment method of farmland wastewater

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 with figure 2 As shown, (1) the farmland wastewater collected in the storage tank 1 is discharged into the plant-enhanced sedimentation pond 2 with evergreen floating plants;

[0032] (2) The farmland wastewater treated by the plant-enhanced sedimentation pond 2 enters the upflow multi-stage percolation system 3, where the filler of the multi-stage percolation system is zeolite molecular sieve, and the general formula of zeolite molecular sieve is (Na, K) x (Mg,Ca,Sr,Ba……) y ·[Al x +ySin-(x+2y)O 2n ]·MH 2 O; The thickness of the filler is 8-15cm; this embodiment takes the 4-stage percolation system as an example;

[0033] (3) The farmland wastewater treated by the multi-stage infiltration system 3 enters the biological stability pond 4;

[0034] (4) The farmland wastewater treated by the biological stabilization pond 4 enters the multi-level surface flow wetland 5. In this embodiment, a 2-level surface flow wetland is taken as an example.

Embodiment 2

[0039] Such as figure 1 with figure 2 As shown, (1) the farmland wastewater collected in the storage tank 1 is discharged into the plant-enhanced sedimentation pond 2 with evergreen floating plants;

[0040] (2) The farmland wastewater treated by the plant-enhanced sedimentation pond 2 enters the upflow multi-stage percolation system 3, where the filler of the multi-stage percolation system is zeolite molecular sieve, and the general formula of zeolite molecular sieve is (Na, K) x (Mg,Ca,Sr,Ba……) y ·[Al x +ySin-(x+2y)O 2n ]·MH 2 O; The thickness of the filler is 8-15cm; this embodiment takes the 3-stage percolation system as an example;

[0041] (3) The farmland wastewater treated by the multi-stage infiltration system 3 enters the biological stability pond 4;

[0042] (4) The farmland wastewater treated by the biological stabilization pond 4 enters the multi-level surface flow wetland 5. In this embodiment, a 3-level surface flow wetland is taken as an example.

Embodiment 3

[0047] Such as figure 1 with figure 2 As shown, (1) the farmland wastewater collected in the storage tank 1 is discharged into the plant-enhanced sedimentation pond 2 with evergreen floating plants;

[0048] (2) Farmland wastewater after treatment in the plant-enhanced sedimentation pond 2 enters the upflow multi-stage percolation system 2, wherein the filler of the multi-stage percolation system is zeolite molecular sieve, and the general formula of zeolite molecular sieve is (Na, K) x (Mg,Ca,Sr,Ba……) y ·[Al x +ySin-(x+2y)O 2n ]·MH 2 O; The thickness of the filler is 8-15cm; this embodiment takes the 3-stage percolation system as an example;

[0049] (3) The farmland wastewater treated by the multi-stage infiltration system 3 enters the biological stability pond 4;

[0050] (4) The farmland wastewater treated by the biological stabilization pond 4 enters the multi-level surface flow wetland 5. In this embodiment, a 3-level surface flow wetland is taken as an example.

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Abstract

The invention discloses a treatment method of farmland wastewater, belonging to the technical field of wastewater treatment. The method comprises the following steps: (1) discharging farmland wastewater collected to a conditioning and storage tank into a plant reinforced precipitation pond with evergreen floating plants; (2) sending the farmland wastewater treated by the plant reinforced precipitation pond into an upstream multistage infiltration system; (3) sending the farmland wastewater treated by the multistage infiltration system into a biological stabilization pond; and (4) sending the farmland wastewater treated by the biological stabilization pond into a multistage surface flow wetland. The farmland wastewater containing high nitrate nitrogen pollutants is treated by a treatment technique which is mainly based on anaerobic denitrification and assisted by ecological wetland filtration and plant absorption; and thus, the method solves the problems of poor treatment effect, high investment and maintenance cost and the like in other farmland wastewater treatment methods, and has obvious environmental benefit and economic benefit.

Description

Technical field [0001] The invention belongs to the technical field of wastewater treatment, and specifically relates to a method for treating farmland wastewater. Background technique [0002] Farmland irrigation wastewater is very different from domestic sewage. Farmland irrigation wastewater, especially the irrigation wastewater in vegetable planting areas, is mainly polluted by nutrients such as nitrogen and phosphorus due to the large amount of fertilizer and pesticide application, and the nitrogen mainly exists in the form of nitrate nitrogen, and the pH value has not changed significantly. Its main characteristics are small quantity, wide coverage, dispersion, and large fluctuations in water quality and quantity. At present, irrigation wastewater in most planting areas of the country is still not effectively treated. Farmland irrigation wastewater not only destroys the local ecological environment, but is also one of the main sources of surface water pollution. [0003] At...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 吴文卫杨逢乐赵磊李文卿叶金利田军李转寿
Owner 云南省环境科学研究院(中国昆明高原湖泊国际研究中心)
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