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Method for treating ammonia nitrogen wastewater

A technology of ammonia nitrogen wastewater and ammonia nitrogen, applied in the field of treating ammonia nitrogen wastewater by microwave field, can solve the problems of high cost and low efficiency, and achieve the effects of low investment and operation cost, scientific and reasonable process, and simple and easy operation

Inactive Publication Date: 2011-04-06
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: low efficiency and high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: the ammonia nitrogen concentration of ammonia nitrogen waste water is 5000mg / l, and initial volume is 100ml, adds 8.0g modified active carbons, puts into microwave power and is 600W, and the microwave reactor that temperature is 117 ℃ radiates 8min, measures the ammonia nitrogen concentration of effluent: 227mg / l, volume is about 20ml, NH in wastewater before treatment 3 -N absolute content is 500mg, NH in treated wastewater 3 The absolute content of -N is 4.54mg, and the removal rate of ammonia nitrogen is 99.09%.

Embodiment 2

[0026] Example 2: The ammonia nitrogen concentration of the ammonia nitrogen wastewater is 2000 mg / l, the initial volume is 100 ml, 6.0 grams of modified activated carbon is added, and the microwave power is 600 W, and the temperature is radiated in a microwave reactor at 117 ° C for 8 minutes to measure the concentration of ammonia nitrogen in the effluent The ammonia nitrogen removal rate is 30.2mg / l, the volume is about 30ml, and the removal rate of ammonia nitrogen is 98.5%.

Embodiment 3

[0027] Example 3: The concentration of ammonia nitrogen is 1000 mg / l, the initial volume is 100 ml, 1.5 g of modified activated carbon is added, the microwave power is 500 W, and the temperature is 117 ° C in a microwave reactor for 6 minutes of radiation, and the concentration of ammonia nitrogen in the effluent is 11.4 mg / l, the volume is about 50ml, and the removal rate of ammonia nitrogen is 98.6%.

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Abstract

The invention relates to a method for treating ammonia nitrogen wastewater, which comprises the steps of: removing ammonia nitrogen under the irradiation of a microwave field; before removing the ammonia nitrogen, sequentially measuring the ammonia nitrogen concentration of the ammonia nitrogen wastewater and adding the operation of modifying active carbon, wherein the ammonia nitrogen mass ratioof the modified active carbon to the ammonia nitrogen wastewater is 2-212:1; adding the modified active carbon to the ammonia nitrogen wastewater to form a liquid and solid mixture solution; and removing the ammonia nitrogen of the liquid and solid mixture solution under the irradiation of the microwave field. The modified active carbon is used for modifying active carbon by using one or more of sodium hydroxide, potassium hydroxide, sodium chloride, potassium chloride, sodium metasilicate nonahydrate, hydrochloric acid and sulfuric acid. The time for removing the ammonia nitrogen under the irradiation of the microwave field is 4-15min, and the temperature is 50-117 DEG C. The method can also be used for continuously treating the wastewater by using a solid-carrying active carbon modifying method, has the advantages of scientific and reasonable process, low investment and operation cost and high removing efficiency, and is simple and easy to operate.

Description

technical field [0001] The invention relates to a wastewater treatment technology, in particular to a method for treating ammonia nitrogen wastewater by utilizing a microwave field. Background technique [0002] Ammonia nitrogen wastewater can be produced in many industrial processes, such as food processing, leather manufacturing and catalyst preparation, especially when ammonia water is directly added in the catalyst preparation process. The serious consequences of a large amount of high-concentration ammonia nitrogen wastewater being discharged are: algal blooms in rivers and lakes, and red tides in oceans. These phenomena will lead to the lack of oxygen in the water body, the death of fish, etc., and at the same time reduce the self-purification ability of the water body, seriously endangering the living environment of human beings. Therefore, countries all over the world attach great importance to the control of water pollution. [0003] At present, the treatment meth...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/30
Inventor 周继承姚燕高令飞
Owner XIANGTAN UNIV
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