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A system and method for automatic and efficient purification of total nitrogen in water body

A technology for purification systems and water bodies, applied in chemical instruments and methods, water treatment parameter control, biological water/sewage treatment, etc. effect, low cost of operation, effect of improving hydraulic conditions

Active Publication Date: 2020-01-14
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Aiming at the serious problems of excessive total nitrogen in water body, large investment, high operation cost and poor process flexibility of existing sewage treatment methods, the present invention provides an automatic and efficient purification method for total nitrogen in water body

Method used

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  • A system and method for automatic and efficient purification of total nitrogen in water body
  • A system and method for automatic and efficient purification of total nitrogen in water body
  • A system and method for automatic and efficient purification of total nitrogen in water body

Examples

Experimental program
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Effect test

Embodiment 1

[0049] Four parts are set up in a river course: purification system 1, modification system 2, total nitrogen detection system 3, and denitrification and denitrification system 4. The purification system 1, the total nitrogen detection system 3, and the denitrification denitrification system 4 are connected in sequence, and the modification system 2 is connected to the purification system 1.

[0050] In the purification system 1, the geotextile 1-4 is arranged under the floating body 1-1 in a wrapping state, wherein the bottom and the side are arranged with the geotextile 1-4. The gravel 1-3 is located at the bottom wrapped by the geotextile and is close to the geotextile 1-4, the biochar substrate 1-2 is located on the top of the gravel 1-3, and the plants 1-5 are planted on the biochar substrate 1-2. Oxygen is supplied to microorganisms on the biochar matrix 1-2 through the action of plant roots, and nitrification is improved.

[0051] The material of the floating body 1-1 i...

Embodiment 2

[0066] Others are the same as embodiment 1.

[0067] Case 2: TN 2~5mg / L;

[0068] The PLC controller 3-2 controls the reflux pump 4-3, and the reflux ratio is 50-80%.

[0069] The water quality before and after treatment by this method is shown in Table 2.

[0070] Table 2 embodiment 2 water quality situation before and after treatment

[0071] index pH Total nitrogen content TN(mg / L) NH 3 -N (mg / L)

Embodiment 3

[0073] Others are the same as embodiment 1.

[0074] Case 3: TN 5~8mg / L;

[0075] The PLC controller 3-2 controls the reflux pump 4-3, and the reflux ratio is 100-150%.

[0076] The water quality before and after treatment by this method is shown in Table 3.

[0077] Table 3 embodiment 3 water quality situation before and after treatment

[0078] index pH Total nitrogen content TN(mg / L) NH 3 -N (mg / L)

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Abstract

The invention discloses an automatic efficient purification system for total nitrogen of water and a method of the automatic efficient purification system. The system comprises a purification system (1), a modification system (2), a total nitrogen detection system (3) and a denitrification system (4), wherein the purification system (1), the total nitrogen detection system (3) and the denitrification system (4) are sequentially connected, and the modification system (2) is connected to the purification system (1); the purification system (1) is used for supplying oxygen to microbes on a biochar matrix by using plant root system action and improving nitrification. The modification system (2) is used for carrying out aeration modification on the biochar matrix (1-2) through an aeration pump(2-1), so as to improve the microbial activity of the biochar matrix (1-2). The total nitrogen detection system (3) is used for monitoring total nitrogen in water, and the denitrification system (4) is started up to perform refluxing when the total nitrogen exceeds a set standard value, so as to improve hydraulic conditions and improve a denitrification effect. The system and the method are high in denitrification efficiency, good in treatment effect, small in investment and low in operating cost, biochar is subjected to resource-converting utilization, and in-situ purification does not need afloor area.

Description

technical field [0001] The invention belongs to the fields of environmental protection and water body restoration, and in particular relates to an automatic and high-efficiency purification method for total nitrogen in water bodies. Background technique [0002] Total nitrogen is generally considered to be the sum of nitrate nitrogen, nitrite nitrogen, ammonia nitrogen and organic nitrogen. The ammonia nitrogen in the water body generates nitrate under the action of oxygen, and further forms nitrate. At the same time, the nitrite and nitrate in the water body are transformed into nitrogen gas by microorganisms under anoxic conditions. Total nitrogen reflects the main indicator of eutrophication in water bodies. Among them, the "Surface Water Environmental Index Standard" (GB3838-2002) clearly pointed out that the standard of Class III is 1.0 mg / L, the standard of Class IV is 1.5 mg / L, and the standard of Class V is 2.0 mg / L; Ammonia nitrogen pollution is dominant, and orga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/32C02F3/34C02F3/30
CPCC02F3/305C02F3/32C02F3/34C02F2003/003C02F2203/006C02F2203/008C02F2209/005C02F2209/14C02F2209/16C02F2209/22C02F2301/046
Inventor 沈晓笑马吴成赵子龙邵孝侯
Owner HOHAI UNIV
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