Method for deep treatment of nitrate nitrogen in wastewater based on electrochemistry and resin combining technology

A combined process and advanced treatment technology, applied in the field of nitrate nitrogen, can solve the problems of filter membrane pollution, high power consumption, low ozone utilization rate, etc., and achieve the effects of simple operation process, good regeneration performance and stable operation effect.

Inactive Publication Date: 2019-04-16
QUANZHOU INST FOR ENVIRONMENTAL PROTECTION IND NANJING UNIV
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

CN 106186592A proposes "a device for removing nitrate nitrogen in resin desorption liquid and its application process", but the ozone advanced oxidation method has the disadvantages of low ozone utilization rate and high power consumption; CN 206203954U proposes "membrane module electrodialysis online In the process of "resin regeneration device", there are problems of high operating cost, membrane pollution and pollutants still need to be treated after separation; desorption liquid disposal technologies such as enhanced coagulation have high operating costs, and there is no resource for desorption liquid It is difficult to truly solve industrial problems

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  • Method for deep treatment of nitrate nitrogen in wastewater based on electrochemistry and resin combining technology

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Effect test

Embodiment 1

[0028] like figure 1 As shown, the method for advanced treatment of nitrate nitrogen in waste water based on electrochemical and resin combination process provided by the present invention comprises the following steps in sequence:

[0029] A. Resin adsorption process, pass the wastewater to be treated with a nitrate nitrogen concentration of 20mg / L through a 10ml resin column, adjust the influent flow rate to 6BV / h, and stop the adsorption when the adsorption reaches the breakthrough point;

[0030] B. Saturated resin regeneration process, that is, the resin adsorbed and saturated in the resin reactor is discharged into the resin regenerator, and 100ml of 12% sodium chloride solution is used as the regenerant, and the volume ratio of the regenerant to the resin is 10:1 to obtain 10ml Fresh resin and 100ml desorption solution, the concentration of nitrate nitrogen in the desorption solution is 947.98mg / L;

[0031] C, desorption solution treatment process, the 100ml desorption...

Embodiment 2

[0036] The method for advanced treatment of nitrate nitrogen in wastewater based on electrochemical and resin combination process provided by the present invention comprises the following steps in sequence:

[0037] A. Resin adsorption process, pass the wastewater to be treated with a nitrate nitrogen concentration of 45mg / L through a 10ml resin column, adjust the influent flow rate to 6BV / h, and stop the adsorption when the adsorption reaches the breakthrough point;

[0038]B, saturated resin regeneration process, is about to discharge the saturated resin in the resin reactor into the resin regenerator, use 12% sodium chloride solution of 100ml as regenerant, the volume ratio of regenerant and resin is 10:1, obtain 10ml of fresh resin and 100ml of desorption solution, the concentration of nitrate nitrogen in the desorption solution is 913.94mg / L;

[0039] C, desorption solution treatment process, the 100ml desorption solution obtained in step B is about to be electrolyzed, an...

Embodiment 3

[0044] The method for advanced treatment of nitrate nitrogen in wastewater based on electrochemical and resin combination process provided by the present invention comprises the following steps in sequence:

[0045] A. Resin adsorption process, pass the wastewater to be treated with a nitrate nitrogen concentration of 80mg / L through a 10ml resin column, adjust the influent flow rate to 6BV / h, and stop the adsorption when the adsorption reaches the breakthrough point;

[0046] B. Saturated resin regeneration process, that is, the resin adsorbed and saturated in the resin reactor is discharged into the resin regenerator, and 100ml of 12% sodium chloride solution is used as the regenerant, and the volume ratio of the regenerant to the resin is 10:1 to obtain 10ml Fresh resin and 100ml desorption solution, the concentration of nitrate nitrogen in the desorption solution is 950.11mg / L;

[0047] C, desorption solution treatment process, the 100ml desorption solution obtained in the ...

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Abstract

The invention relates to a method for deep treatment of nitrate nitrogen in wastewater based on electrochemistry and a resin combining technology, belongs to the field of deep treatment and recyclingof wastewater, and aims at providing the method for efficiently removing nitrate nitrogen in the wastewater. The method comprises the steps of a resin adsorption technology, a saturated resin desorption technology, a resin desorption liquid treatment technology and a resin regeneration technology. According to the method, resin desorption liquid is subjected to a catalytic reduction technology through the adsorption and desorption circulating technologies on nitrate nitrogen in the wastewater with the assistance of resin in combination with electrocatalysis, and nitrate nitrogen in the wastewater is jointly removed. The aim of recycling and harmless treatment is achieved for treatment of desorption liquid, and the requirement for recycling the resin is met.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a method for advanced treatment of nitrate nitrogen in waste water based on an electrochemical and resin combination process. Background technique [0002] Due to the continuous progress of commerce, industry, and agriculture, the nitrogen content in various water bodies such as industrialized production sewage, domestic sewage, and drinking water sources continues to increase. Nitrogen is one of the important factors that cause water eutrophication and pollution, and its excessive discharge has a great impact on the wastewater treatment process of urban water plants. The study pointed out that the adoption of advanced treatment technology in sewage treatment plants can greatly alleviate the eutrophication problem caused by the increase of nitrogen concentration in receiving natural water bodies. In order to protect public health and the ecological environme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F101/16
CPCC02F1/285C02F1/42C02F1/467C02F9/00C02F2001/422C02F2101/163C02F2303/16
Inventor 胡大波张莉邱玉胡喆季荣李爱民
Owner QUANZHOU INST FOR ENVIRONMENTAL PROTECTION IND NANJING UNIV
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