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Process method and device for advanced treatment of nitrate nitrogen in water

A technology of advanced treatment and process method, applied in the field of water treatment, can solve the problems of huge consumption of reducing agent, large consumption of regeneration liquid, application limitation, etc., to reduce the loss of self-active denitrification filter material, reduce the amount of treated water, save energy Effects of processing costs

Pending Publication Date: 2021-01-26
艾西姆(辽宁)环境技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The consumption of reducing agent is huge, the cost is high, and it is rarely used in the treatment of municipal sewage
[0010] In summary, the existing technologies have certain application limitations, and it is urgent to develop a nitrate nitrogen removal process with a wide range of applications, low investment and operating costs, and easy operation and management.
[0011] In the improvement of the above-mentioned existing sewage denitrification process, the improvement of the regeneration solution of the ion exchange method is expected to achieve the effect of reaching the standard of total nitrogen treatment without large-scale modification and expansion; The exchange method is simple, convenient, low cost, stable residue, and no secondary pollution. However, due to the strong selectivity of the conventional ion exchange method, complex manufacturing, high cost, and large consumption of regeneration solution
Therefore, it is very limited in application

Method used

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  • Process method and device for advanced treatment of nitrate nitrogen in water
  • Process method and device for advanced treatment of nitrate nitrogen in water

Examples

Experimental program
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Effect test

Embodiment 1

[0054] A device for advanced treatment of nitrate nitrogen in water, the schematic diagram of which is shown in figure 1 , including treatment process equipment and regeneration process equipment;

[0055] Treatment process equipment includes nitrate nitrogen wastewater storage tank 1, ion exchange security filter 2, ion exchange tank 3, nitrate nitrogen online monitoring equipment 4, effluent pool 5; regeneration process equipment includes regeneration liquid storage tank 6, dilution tank 7, Self-active denitrification filter 8, ultrafiltration system 9, reverse osmosis system 10 and electric drive ion membrane 11;

[0056] Wherein, the ion exchange tank 3 is provided with a water inlet, a water outlet, a regenerated liquid inlet and a regenerated liquid outlet, and the ion exchange tank 3 is provided with a polymer phenolic synthetic material with an exchange capacity of 15-30 mg / g. An inlet valve is also arranged above the ion exchange tank 3 for balancing the air pressure...

Embodiment 2

[0072] A device for advanced treatment of nitrate nitrogen in water is the same as that in Embodiment 1, except that a security filter is provided between the ultrafiltration system and the reverse osmosis system.

[0073] A process for advanced treatment of nitrate nitrogen in water, comprising the following steps:

[0074] Step 1: Adsorption

[0075] The mass concentration of nitrate nitrogen in the nitrate nitrogen wastewater in the nitrate nitrogen wastewater storage tank is 10-500mg / L;

[0076] Pass the nitrate nitrogen wastewater in the nitrate nitrogen wastewater storage tank through the ion exchange security filter to remove the sludge suspended matter produced by the front-end conventional nitrification treatment of the sewage, enter the ion exchange tank, and use the polymer nitrate nitrogen adsorbent for adsorption , after adsorption, the effluent from which nitrate radicals have been removed will be discharged to the effluent pool after being tested by the nitrate...

Embodiment 3

[0086] A device for advanced treatment of nitrate nitrogen in water, same as embodiment 1.

[0087] A process for advanced treatment of nitrate nitrogen in water, comprising the following steps:

[0088] Step 1: Adsorption

[0089] The mass concentration of nitrate nitrogen in the nitrate nitrogen wastewater in the nitrate nitrogen wastewater storage tank is 10-500mg / L;

[0090]Pass the nitrate nitrogen wastewater in the nitrate nitrogen wastewater storage tank through the ion exchange security filter to remove the sludge suspended matter produced by the front-end conventional nitrification treatment of the sewage, enter the ion exchange tank, and use the polymer nitrate nitrogen adsorbent for adsorption , after adsorption, the effluent from which nitrate radicals have been removed will be discharged to the effluent pool after being tested by the nitrate nitrogen online monitoring equipment. ;

[0091] Step 2: Regeneration

[0092] Adding a sodium chloride solution with a ...

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Abstract

The invention discloses a process method and device for advanced treatment of nitrate nitrogen in water, and belongs to the field of nitrate nitrogen wastewater treatment processes. Nitrate nitrogen wastewater is absorbed through a macromolecular nitrate nitrogen adsorbent to obtain nitrate-removed effluent, and the nitrate-removed effluent is discharged after the nitrate-removed effluent is detected to reach the standard; when the effluent does not reach the standard, a sodium chloride solution with the mass percentage concentration of 35% is added into the macromolecular nitrate nitrogen adsorbent for regeneration, a self-activity denitrification process is conducted after obtained regenerated waste liquid is diluted, and the effluent obtained after the self-activity denitrification process is sequentially subjected to ultrafiltration, reverse osmosis and electrodialysis concentration to serve as fresh regenerated liquid; and both the reverse osmosis fresh water and the electrodialysis fresh water are used as diluents of regenerated waste liquid. The process is high in automation degree, easy to manage, small in equipment investment and low in operation cost. According to the method, the macromolecular nitrate nitrogen adsorbent is adopted to adsorb nitrate nitrogen in the water, the regenerated waste liquid is filtered out through self-activity denitrification, and the method has the advantages that no waste liquid or waste gas is discharged, and the process cleanliness is high.

Description

technical field [0001] The invention relates to the field of water treatment, and belongs to a process for treating nitrate nitrogen wastewater, in particular to a process method and a device for advanced treatment of nitrate nitrogen in water. Background technique [0002] With the increasingly prominent problem of water pollution in our country, the improvement of urban sewage treatment and discharge standards has become the general trend and has attracted more and more attention from the state and the public. At present, the municipal sewage effluent water quality indicators in most areas have taken the lead in raising the standard to the surface category IV water body, and some areas have already raised the standard to the surface category III water body. The existing operation technology of many sewage plants is difficult to meet the above indicators. The relevant pools were built according to the early standards, and the existing equipment cannot be expanded by hardwar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/42C02F9/14C02F101/16C02F3/30
CPCC02F1/42C02F9/00C02F2101/163C02F3/28C02F2001/422C02F1/444C02F1/441C02F1/4693C02F2303/16C02F3/302
Inventor 王惠丰王富民
Owner 艾西姆(辽宁)环境技术有限公司
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