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Processing method of high-concentration organic ammonia nitrogen waste water

A technology of ammonia nitrogen wastewater and treatment method, which is applied in mechanical oscillation water/sewage treatment, water/sewage multi-stage treatment, oxidized water/sewage treatment, etc. problems, to achieve the effect of improving the degradation rate and saving energy

Inactive Publication Date: 2010-01-13
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The main defect of the air stripping method is that it can only blow off the inorganic ammonia in the wastewater, and the removal effect on the organic ammonia nitrogen is not obvious. As a result, the COD content in the effluent is still high, which cannot meet the discharge standard, and it is not easy to adopt in the future. Biodegradation
In addition, since NH 3 The physical property of being extremely soluble in water makes it difficult to reduce the ammonia nitrogen content to below 100mg / L by the simple air stripping process, so it is necessary to consider the necessity of combining stripping with other new and efficient wastewater treatment processes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take 50 mL of high-concentration organic ammonia nitrogen wastewater (the concentration of ammonia nitrogen is 2000 mg / L), which contains biurea, urea, and hydrazine hydrate. After heating to 50°C in a water bath in an ultrasonic reactor, directly add 2.5 mol / L sodium hydroxide solution to the wastewater to adjust its pH value to 13. Turn on intermittent ultrasound, and use 0.5min ON, 0.5min OFF cycle, and at the same time, 1mL 30% H 2 o 2 Add dropwise to waste water. Intermittent ultrasonic treatment for 20 minutes, the ultrasonic frequency is 30kHz, and the power is 50W. The removal rate of organic ammonia nitrogen in the treated wastewater is 75%.

Embodiment 2

[0024] Take 50mL of high-concentration organic ammonia nitrogen wastewater (the concentration of ammonia nitrogen is 4000mg / L), which contains biurea, urea, and hydrazine hydrate. After heating to 60°C in a water bath in an ultrasonic reactor, adjust the pH to 11 with 2.5mol / L sodium hydroxide solution, enter the reactor, turn on the intermittent ultrasonic, and use 1min ON, 1minOFF to carry out periodically. At the same time, 1mL of 30% H 2 o 2 Add dropwise to waste water. Intermittent ultrasonic treatment was performed for 60 minutes, the ultrasonic frequency was 40kHz, and the power was 100W. The removal rate of organic ammonia nitrogen in the treated wastewater is 93%.

Embodiment 3

[0026] Take 50mL of high-concentration organic ammonia nitrogen wastewater (the concentration of ammonia nitrogen is 4000mg / L), which contains biurea, urea, and hydrazine hydrate. After heating to 70°C in a water bath in an ultrasonic reactor, adjust the pH to 9 with 2.5mol / L sodium hydroxide solution, enter the reactor, turn on intermittent ultrasonic, and use 5min ON, 5minOFF to carry out periodically, and at the same time, add 1mL of 40% H 2 o 2 Add dropwise to waste water. Intermittent ultrasonic treatment was performed for 120 minutes, the ultrasonic frequency was 120kHz, and the power was 350W. The removal rate of organic ammonia nitrogen in the treated wastewater was 83%.

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Abstract

The invention discloses a processing method of organic ammonia nitrogen waste water, which is used for processing the high-concentration organic ammonia nitrogen waste water generated during the production of an ADC foaming agent. The method adopts a synergistic action technique of intermittent ultrasonic waves and hydrogen peroxide and comprises the following steps: a. increasing waste water temperature, and regulating the pH value of the waste water; and b. degrading the waste water under the synergistic action of the intermittent ultrasonic waves and the hydrogen peroxide. The invention enhances the cavitation effect of the ultrasonic waves, optimizes the reaction mass transfer, reduces the ultrasonic processing energy consumption of the organic waste water and enhances the elimination efficiency of organic ammonia nitrogen.

Description

technical field [0001] The invention relates to a treatment method for high-concentration organic ammonia-nitrogen wastewater, in particular to a method for synergistically treating high-concentration organic ammonia-nitrogen wastewater by using power intermittent ultrasonic waves combined with hydrogen peroxide oxidation. Background technique [0002] With the continuous development of industrial and agricultural production and the increasing urban population, the emission of nitrogenous compounds has increased sharply in recent years, which has become the main source of environmental pollution and has attracted attention from all walks of life. In particular, the random discharge of a large amount of non-degradable nitrogen-containing organic matter causes a large number of algae and other microorganisms in the water body to multiply, resulting in eutrophication of the water body, which seriously threatens the survival of humans and aquatic organisms. Ammonia nitrogen wast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F1/36C02F1/66C02F1/72C02F101/38
Inventor 文利雄吴笛陈建峰
Owner BEIJING UNIV OF CHEM TECH
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