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Method for treating ammonia nitrogen waste water containing vanadium using natural clinoptilolite

A technology of clinoptilolite and ammonia nitrogen wastewater, which is applied in the field of treating vanadium-containing ammonia nitrogen wastewater and wastewater by using natural clinoptilolite, can solve the problems of complicated process, high operating cost, and low treatment efficiency of ammonia nitrogen wastewater treatment methods, and achieve the goal of equipment The effect of simplicity, low processing cost, and convenient operation

Inactive Publication Date: 2009-03-11
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The above ammonia nitrogen wastewater treatment methods have not been widely used so far due to low treatment efficiency, high operating costs, and complicated processes.

Method used

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  • Method for treating ammonia nitrogen waste water containing vanadium using natural clinoptilolite
  • Method for treating ammonia nitrogen waste water containing vanadium using natural clinoptilolite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The ammonia nitrogen concentration of the treated vanadium-containing ammonia nitrogen wastewater is 20mg / L, pH=5, and temperature is 20°C.

[0033] 1. Wastewater treatment: Pass the vanadium-containing ammonia-nitrogen wastewater through the ion exchange column equipped with 50g of natural clinoptilolite with a particle size of 0.5-2mm at a flow rate of 30ml / min. The final concentration of ammonia nitrogen in the effluent is 4mg / L, and the installed The ion exchange column with clinoptilolite adsorbs ammonia nitrogen to the breakthrough point;

[0034] 2. Clinoptilolite regeneration: After NaCl and NaOH are prepared into a mixed solution with a concentration of 5.0g / L at a mass ratio of 3:7, the mixed solution is used as a regenerating agent for clinoptilolite, and the flow rate is 15ml / min. The flow rate passes through an ion exchange column equipped with 50 g of clinoptilolite that has adsorbed ammonia nitrogen to reach the breakthrough point, and repeats the passage...

Embodiment 2

[0037] The ammonia nitrogen concentration of the treated vanadium-containing ammonia nitrogen wastewater is 100mg / L, pH=4, and temperature is 25°C.

[0038] 1. Wastewater treatment: pass the vanadium-containing ammonia-nitrogen wastewater through the ion exchange column equipped with 100g of natural clinoptilolite with a particle size of 0.5-2mm at a flow rate of 80ml / min. The ion exchange column of zeolite adsorbs ammonia nitrogen to the breakthrough point;

[0039] 2. Clinoptilolite regeneration: After NaCl and NaOH are prepared into a mixed solution with a concentration of 5.0g / L according to the mass ratio of 4:8, the mixed solution is used as the regeneration agent of clinoptilolite, and the flow rate is 10ml / min. The flow rate passes through an ion-exchange column equipped with 100 g of clinoptilolite that has adsorbed ammonia nitrogen to reach the breakthrough point, repeats the passage 3 times, and the time for each passage is 4 hours to obtain the filtrate of ammonium...

Embodiment 3

[0042] The ammonia nitrogen concentration of the treated vanadium-containing ammonia nitrogen wastewater is 350mg / L, pH=5, and temperature is 22°C.

[0043] 1. Wastewater treatment: Pass the vanadium-containing ammonia-nitrogen wastewater through the ion exchange column equipped with 150g of natural clinoptilolite with a particle size of 0.5-2mm at a flow rate of 60ml / min. The ion exchange column of zeolite adsorbs ammonia nitrogen to the breakthrough point;

[0044] 2. Clinoptilolite regeneration: After NaCl and NaOH are prepared into a mixed solution with a concentration of 5.0g / L according to the mass ratio of 5:9, the mixed solution is used as the regeneration agent of clinoptilolite, and the flow rate is 20ml / min. The flow rate passes through an ion exchange column equipped with 150 g of clinoptilolite that has adsorbed ammonia nitrogen to reach the breakthrough point, repeats the passage twice, and the time for each passage is 3 hours to obtain the filtrate of ammonium c...

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Abstract

The invention provides a method for processing vanadium ammonia nitrogen contained waste water by a natural clinoptilolite. The method comprises the steps: the waste water of which the pH value is between 4 and 7, the temperature is between 20 and 25 DEG C and the ammonia nitrogen concentration is between 20mg / L and 600 mg / L passes through an ion exchange column filled with the natural clinoptilolite at a flow rate of between 10 and 80ml / min; after the ammonia nitrogen concentration in yielding water is reduced to 8mg / L below, NaCl and NaOH are prepared into mixed solution the concentration of which is 5g / L according to the mass ratio of between 2 and 5 to between 5 and 9, then the mixed solution passes through a clinoptilolite adsorption column which adsorbs the ammonia nitrogen and reaches the breakthrough point at a flow rate of between 8 and 20ml / min, and the regeneration is performed for 2 to 5 hours for 2 to 4 times to obtain filtrate of ammonium chloride and the clinoptilolite which is eluted and adsorbs the ammonia nitrogen. The regenerated clinoptilolite is dried at a temperature of 105 DEG C for recycling, and the filtrate of the ammonium chloride is concentrated for recycling. The method has the advantages of low cost of waste water treatment, less investment and large waste water processing quantity; besides, the operation is simple, the ammonium chloride can be recycled, thus the method is an economical and feasible approach for processing the vanadium ammonia nitrogen contained waste water.

Description

technical field [0001] The invention relates to a method for treating waste water, in particular to a method for treating waste water containing vanadium and ammonia nitrogen by using natural clinoptilolite, and belongs to the technical field of metallurgy and environmental protection. Background technique [0002] The vanadium-containing ammonia-nitrogen wastewater mainly comes from the industrial wastewater discharged during the vanadium precipitation stage during the metallurgical vanadium extraction process. This kind of wastewater has a high concentration of ammonia nitrogen. If it is directly discharged into the water without treatment, it will make the water eutrophic and promote algae Breeding, consuming a large amount of dissolved oxygen in water, resulting in the death of aquatic organisms, and serious pollution such as water odor. Ammonia nitrogen will produce NO under the action of dissolved oxygen in water, nitrous bacteria and nitric acid bacteria 2 - and NO ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/42
Inventor 魏昶李存兄樊刚梁艳辉
Owner KUNMING UNIV OF SCI & TECH
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