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Method for treating ammonia nitrogen wastewater

A technology for ammonia nitrogen wastewater and ammonia nitrogen, applied in chemical instruments and methods, degassed water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of low stripping efficiency, easy scaling of packing, high operating cost, etc. Achieve the effects of convenient operation, low operating cost and easy process conditions

Active Publication Date: 2013-02-27
常熟华懋纺织有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the blow-off process in the prior art has the disadvantages of low blow-off efficiency, long time, high temperature requirements, easy fouling of fillers, and high operating costs

Method used

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  • Method for treating ammonia nitrogen wastewater

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Effect test

Embodiment 1

[0023] Take industrial wastewater with an ammonia nitrogen concentration of 1000mg / L, add sodium hydroxide to adjust the pH to 12, add 0.1734g / L composite denitrification agent (the mass percentage of each component of the composite denitrification agent is: nano-iron 57.67%, polyethylene glycol Alcohol 200:42.33%), the waste water was added to the container, the gas-liquid ratio was adjusted to 1800:1, and the ammonia nitrogen removal rate reached 99.99% by ultrasonic blowing at room temperature for 60 minutes.

Embodiment 2

[0025] Take industrial wastewater with an ammonia nitrogen concentration of 2000mg / L, add sodium hydroxide to adjust the pH to 12, add 0.1567g / L composite denitrification agent (the mass percentage of each component of the composite denitrification agent is: nano-iron 63.83%, polyethylene glycol Alcohol 200:36.17%), the waste water was added to the container, the gas-liquid ratio was adjusted to 1800:1, and the ammonia nitrogen removal rate reached more than 99.21% by ultrasonic stripping at room temperature for 100 minutes.

Embodiment 3

[0027] Take industrial wastewater with an ammonia nitrogen concentration of 1000mg / L, add sodium hydroxide to adjust the pH to 12, add 0.19g / L composite denitrification agent (the mass percentage of each component of the composite denitrification agent is: nano-iron 53.06%, polyethylene glycol Alcohol 200:46.94%), the waste water was added to the container, the gas-liquid ratio was adjusted to 1400:1, and the ammonia nitrogen removal rate reached more than 98.45% by ultrasonic stripping at room temperature for 100 minutes.

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Abstract

The invention relates to an ammonia nitrogen stripping agent and method for treating high-concentration ammonia nitrogen wastewater, belonging to the technical field of sewage treatment. The composite denitrifier is composed of 53-86 wt% of nanoparticle and 14-47 wt% of organic alcohol. The prepared composite denitrifier is added into wastewater by ultrasonic air stripping according to the ratio of 0.11-0.19 g / L to regulate the pH value and gas liquid ratio, wherein the ultrasonic air stripping is carried out at normal temperature (25 DEG C). The invention overcomes the defects of low air stripping efficiency, long time, high temperature requirement, high operating cost and the like in the traditional air stripping method, only needs slight composite denitrifier, and has the advantages of low cost, low addition amount, easy acquisition and simple denitrification method.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a method for treating high-concentration ammonia nitrogen wastewater. Background technique [0002] Ammonia nitrogen mainly comes from urban domestic sewage and industrial wastewater. The concentration of ammonia nitrogen in urban domestic sewage is low, and the discharge requirements can be met through appropriate biochemical treatment. The concentration of ammonia nitrogen in industrial wastewater is high, not only from a wide range of sources, but also in the ammonia nitrogen content of wastewater discharged from different types of factories. High-concentration ammonia nitrogen wastewater mainly comes from waste water discharged from industries such as petrochemical, non-ferrous metal chemical metallurgy, fertilizer, monosodium glutamate, meat processing and breeding, and landfill leachate. Ammonia nitrogen is an important factor causing water eutrophication. Due to its la...

Claims

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Application Information

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IPC IPC(8): C02F1/20C02F1/36C02F101/16
Inventor 冯俊生赵丽华
Owner 常熟华懋纺织有限公司
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