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Method for removing ammonia from salicylamide-containing wastewater

A technology containing salicylamide and salicylamide, applied in chemical instruments and methods, neutralized water/sewage treatment, multi-stage water/sewage treatment, etc., can solve problems such as difficult treatment and easy crystallization, and achieve the goal of improving efficiency Effect

Inactive Publication Date: 2017-05-10
SUZHOU EDGECROSS MEMBRANE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is: provide a kind of deammonification method of salicylamide-containing wastewater, to solve the problems in the prior art that salicylamide-containing wastewater is prone to crystallization and difficult to handle, and improve the treatment efficiency of salicylamide-containing wastewater

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  • Method for removing ammonia from salicylamide-containing wastewater

Examples

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Comparison scheme
Effect test

Embodiment 1

[0036] Example 1, the concentration of ammonia nitrogen in a certain salicylamide-containing wastewater is 1000 mg / L, and the pH value of the solution is 6.3. Pass the salicylamide-containing wastewater into the circulation system, inject the ammonia water with a concentration of 1.5mol / L into the ammonia water injection port of the circulation system, adjust the pH value of the salicylamide-containing wastewater, keep the pH value at about 8, and pass through 5 microns After the filter is filtered, the temperature of the wastewater is kept at about 36 degrees by using the circulation storage tank, and the flow rate of the wastewater in the circulation system is controlled to be 0.1m / s. After 20 hours of circulation treatment, the removal efficiency reaches 78%. It takes 40 hours for conventional deamination to treat the same concentration and volume of salicylamide-containing wastewater, and the deamination effect is not as good as the method used in this example. The method o...

Embodiment 2

[0037] Example 2, the concentration of ammonia nitrogen in certain salicylamide-containing wastewater is 1000 mg / L, and the pH value of the solution is 6.3. Pass the salicylamide-containing wastewater into the circulation system, inject the ammonia water with a concentration of 1.5mol / L into the ammonia water injection port of the circulation system, adjust the pH value of the salicylamide-containing wastewater, keep the pH value at about 8, and pass through 5 microns After filtering through the filter, use the circulating storage tank to keep the wastewater temperature at about 36 degrees. At the same time, in each process, the salicylamide-containing wastewater is stirred, especially in the circulating storage tank, the salicylamide-containing wastewater must be continuously treated Stir to keep the concentration of salicylamide-containing wastewater uniform between parts, and control the flow rate of wastewater in the circulation system to 0.1m / s. After 20 hours of circulati...

Embodiment 3

[0038] Example 3, the concentration of ammonia nitrogen in certain salicylamide-containing wastewater is 1000 mg / L, and the pH value of the solution is 6.3. Pass the salicylamide-containing wastewater into the circulation system, inject ammonia water with a concentration of 1.5mol / L at the ammonia injection port of the circulation system, adjust the pH value of the salicylamide-containing wastewater, keep the pH value at about 10, and pass through 5 microns After filtering through the filter, use the circulating storage tank to keep the wastewater temperature at about 36 degrees. At the same time, in each process, the salicylamide-containing wastewater is stirred, especially in the circulating storage tank, the salicylamide-containing wastewater must be continuously treated Stir to keep the concentration between the parts of the salicylamide-containing wastewater even, and control the flow rate of the wastewater in the circulation system to be 0.1m / s. After 20 hours of circulat...

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Abstract

The invention discloses a method for removing ammonia from salicylamide-containing wastewater. The method comprises the following steps: 01) establishing a circulation system for treating salicylamide-containing wastewater; 02) injecting ammonia water into the salicylamide-containing wastewater, and regulating the pH value of the salicylamide-containing wastewater, so that the salicylamide-containing wastewater is alkaline; 03) enabling the alkaline salicylamide-containing wastewater to enter a circulating storage tank, and controlling the temperature of the circulating storage tank; 04) opening a pumping system, and circulating the salicylamide-containing wastewater in the circulating storage tank so as to pass through a membrane contactor; 05) performing ammonia removal treatment on the salicylamide-containing wastewater by utilizing the membrane contactor; and 06) repeatedly cycling the steps 02) to 05) until ammonia removal treatment of the salicylamide-containing wastewater is completed.

Description

technical field [0001] The invention relates to the fields of wastewater treatment and chemistry, in particular to a method for deammonizing wastewater containing salicylamide. Background technique [0002] In industrial production, common water pollution and air pollution mainly come from ammonia nitrogen pollution. Usually, industrial wastewater contains a large amount of ammonia nitrogen solution. Therefore, how to deal with ammonia nitrogen in industrial wastewater is an urgent problem to be solved. [0003] In the prior art, there are mainly biological deamination methods, membrane deamination methods, chemical precipitation methods and the like. The biological deamination method is difficult to use in large quantities due to its high cost, and the chemical precipitation method will cause secondary pollution and other problems. Therefore, the common treatment method is membrane deamination method. [0004] The existing membrane deamination method generally directly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/16
CPCC02F9/00C02F1/001C02F1/44C02F1/66C02F2101/16
Inventor 丁飞金利峰
Owner SUZHOU EDGECROSS MEMBRANE TECH
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