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Method for deeply removing high-concentration nitrate nitrogen in wastewater

A nitrate nitrogen, high-concentration technology, applied in the direction of chemical instruments and methods, water pollutants, water/sewage multi-stage treatment, etc., can solve the problems of difficult and thorough removal, lack of technology, poor stability, etc., to achieve economical removal, Efficient removal effect

Inactive Publication Date: 2017-06-27
NANJING INNOVATION CENT FOR ENVIRONMENTAL PROTECTION IND
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  • Abstract
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  • Application Information

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Problems solved by technology

[0008] The present invention provides an economical, high-efficiency, and cold-resistant deep removal of high-concentration nitrate nitrogen in wastewater to solve the technical problems of lack of technology, low temperature resistance, difficulty in thorough removal, and poor stability in the removal of high-concentration nitrate nitrogen in wastewater. Nitrogen method

Method used

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  • Method for deeply removing high-concentration nitrate nitrogen in wastewater

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Effect test

Embodiment 1

[0028] like figure 1 As shown, the method for the deep removal of high-concentration nitrate nitrogen in wastewater of the present embodiment is carried out in the following steps:

[0029] A. The treatment process of denitrification deep bed filter, that is, NO 3 - -N concentration of 100mg / L, pH of 6.5, temperature of 35℃ to be treated wastewater is pumped into the denitrification deep bed filter, the carbon-nitrogen ratio is adjusted to 3, the hydraulic retention time is 20min, and the concentration of nitrate nitrogen in the effluent is 50mg / L ;

[0030] B. The magnetic ion exchange resin adsorption process is to pump the effluent from the denitrification deep bed filter into the magnetic resin adsorption reactor filled with the Chinese patent application publication number CN 105461846A, and adjust the hydraulic load to 6m 3 / (m 2 h), the adsorption time is 15min, and the concentration of nitrate nitrogen in the effluent is 20mg / L;

[0031] C. The regeneration of the...

Embodiment 2

[0033] The method of deep removal of high concentration nitrate nitrogen in the waste water of the present embodiment is carried out according to the following steps:

[0034] A. The treatment process of denitrification deep bed filter, that is, NO 3 - -N concentration of 80mg / L, pH of 7, temperature of 25°C, the wastewater to be treated is pumped into the denitrification deep bed filter, the carbon-nitrogen ratio is adjusted to 4, the hydraulic retention time is 40min, and the concentration of nitrate nitrogen in the effluent is 40mg / L ;

[0035] B. The magnetic ion exchange resin adsorption process is to pump the effluent from the denitrification deep bed filter into the magnetic resin adsorption reactor filled with the Chinese patent application publication number CN 102430433A, and adjust the hydraulic load to 4m 3 / (m 2 h), the adsorption time is 25min, and the concentration of nitrate nitrogen in the effluent is 15mg / L;

[0036] C. Regeneration of magnetic ion exchan...

Embodiment 3

[0038] The method of deep removal of high concentration nitrate nitrogen in the waste water of the present embodiment is carried out according to the following steps:

[0039] A. The treatment process of denitrification deep bed filter, that is, NO 3 - -N concentration of 60mg / L, pH of 7.5, temperature of 15°C, the wastewater to be treated is pumped into the denitrification deep bed filter, the carbon-nitrogen ratio is adjusted to 6, the hydraulic retention time is 60min, and the concentration of nitrate nitrogen in the effluent is 30mg / L ;

[0040] B. The magnetic ion exchange resin adsorption process is to pump the effluent of the denitrification deep bed filter into the magnetic resin adsorption reactor filled with the Chinese patent application publication number CN 103497281A, and adjust the hydraulic load to 3m 3 / (m 2 h), the adsorption time is 45min, and the concentration of nitrate nitrogen in the effluent is 10mg / L;

[0041] C. The regeneration of the magnetic io...

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Abstract

The invention relates to a method for deeply removing high-concentration nitrate nitrogen in wastewater and belongs to the field of wastewater treatment. The method includes: treating with a denitrification deep-bed filtering tank; using magnetic ion exchange resin for absorption; regenerating the magnetic ion exchange resin. The method has the advantages that the method is economic, efficient and resistant to cold; the technical features of the denitrification deep-bed filtering tank technology and the magnetic ion exchange resin absorption technology are combined to deeply remove the high-concentration nitrate nitrogen in the wastewater.

Description

technical field [0001] The invention belongs to the field of waste water treatment, in particular to a method for deeply removing high-concentration nitrate nitrogen in waste water. Background technique [0002] In recent years, the eutrophication of water bodies has been greatly accelerated due to the excessive discharge of some plant-based nutrient elements such as nitrogen into water bodies. Nitrogen in water mainly exists in several forms such as nitrate nitrogen, nitrite nitrogen, ammonia nitrogen and organic nitrogen. Among them, the removal of nitrate nitrogen has always been a difficult point in the treatment of nitrogen pollution. At present, the main applied technologies are membrane separation technology and biochemical denitrification technology. [0003] In the field of wastewater treatment, membrane separation technology is a technology that uses artificially synthesized or natural polymer films to selectively separate pollutants in water with external energy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F1/42C02F1/48C02F3/28C02F2101/163
Inventor 姜笔存曲艳南宋均轲于伟华胡海兰谈政焱陈达王强
Owner NANJING INNOVATION CENT FOR ENVIRONMENTAL PROTECTION IND
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