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A combined farmland non-point source sewage purification device, its purification process and its application

A sewage purification and combined technology, applied in water/sewage treatment, biological water/sewage treatment, water/sewage treatment equipment, etc., can solve the problems of reducing the eutrophication of farmland non-point source pollution and receiving water body, and achieve maintenance Convenient management, simple production, reduced risk and degree of effect

Active Publication Date: 2020-08-18
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a combined farmland sewage treatment device and method, the purpose of which is to overcome the problem of farmland non-point source pollution, and to effectively control nitrogen in farmland non-point source pollution by erecting a combined farmland non-point source sewage purification device between the farmland and the farmland drainage ditch Phosphorus concentration, thereby reducing the degree of eutrophication of farmland non-point source pollution receiving water body

Method used

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  • A combined farmland non-point source sewage purification device, its purification process and its application
  • A combined farmland non-point source sewage purification device, its purification process and its application
  • A combined farmland non-point source sewage purification device, its purification process and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] refer to figure 1 As shown, a certain farmland 2 has an area of ​​about 10 mu, and there is a field ridge 3 on the edge of the field, and a field drainage ditch 4 on the outside of the field ridge. The width of the drainage ditch is about 6m, and the depth is about 1.3m. A combined farmland non-point source sewage purification device 1 is arranged between the field ridge and the drainage ditch.

[0031] The combined farmland non-point source sewage purification device is composed of the unit 9 of the combined farmland non-point source sewage purification device with different levels and heights fixed and assembled by bolts 8, and the whole is in the shape of a ladder. Space 6 is filled with lightweight porous composite ceramsite filter material. When the sewage passes through the combined farmland non-point source sewage purification device, water falls from the steps to achieve the effect of automatic aeration and oxygenation, which is beneficial to the growth of micr...

Embodiment 2

[0048] Others are the same as in Example 1, the ratio of attapulgite and corn stalk powder is 3:1.

[0049] The pollutant removal situation before and after the treatment of Example 2 is shown in Table 2.

[0050] Table 2 Example 2 Pollutant removal situation before and after treatment

[0051]

Embodiment 3

[0053] Others are the same as in Example 1, the ratio of attapulgite and corn stalk powder is 5:1.

[0054] The pollutant removal situation before and after the treatment of Example 3 is shown in Table 3.

[0055] Table 3 Example 3 Pollutant removal situation before and after treatment

[0056]

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Abstract

The invention discloses a combined type farmland surface source sewage purification device as well as a purification technology and application thereof. The stepped combined type farmland surface source sewage purification device is arranged between a farmland and a water drainage ditch; light-weight porous composite ceramsite filled into the device provides enough oxygen gas for microorganism degradation pollutants; an opening is formed in a farmland ridge to introduce farmland sewage; farmland drained water passes through stairs of a purification device to form water fall, so that the concentration of dissolved oxygen in water and the hydraulic retention time are improved; and output water is drained into the water drainage ditch so that the farmland drained water flows through a water quality purifier as much as possible to be treated. The combined type farmland surface source sewage purification device has the advantages of good surface source pollution nitrogen and phosphorus purification effect, convenience for maintenance and management, less engineering investment, simplicity in production and low construction price, can realize industrial production and is not limited by time, seasons, places and the like.

Description

technical field [0001] The invention belongs to the fields of environmental protection and agricultural non-point source pollution control, and more specifically relates to a convenient treatment method for effectively reducing nitrogen, phosphorus and organic pollutants in farmland sewage. Background technique [0002] Farmland non-point source pollution has become the main cause of eutrophication in many water bodies in my country, and its contribution rate exceeds point source pollution from urban domestic sewage and industry. Water pollution caused by farmland non-point source will be the biggest challenge for China's sustainable development one. Farmland non-point source pollutants produced by farmland drainage are relatively complex and vary with the types of fertilizers and pesticides applied, but generally they are mainly nitrogen, phosphorus, organic matter and pesticide residues. Effective control of nitrogen and phosphorus concentrations in farmland non-point sour...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/00
CPCC02F3/00C02F2201/002
Inventor 许明张璐璐薛朝霞方芳操家顺
Owner HOHAI UNIV
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