Ammonia removal method by ammonia nitrogen wastewater membrane integration

A technology of ammonia nitrogen wastewater and membrane integration, which is applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., to achieve resource utilization, avoid secondary pollution, and achieve discharge standards

Active Publication Date: 2013-05-08
湖南海铭特种膜有限公司
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Problems solved by technology

[0014] The beneficial effects of the present invention are: not only can obtain more than 99% ammonia nitrogen removal efficiency, realize the discharge of high-concentration ammonia-nitrogen wastewater up to the standard, but also recover more than 95% to 99% of ammonia in high-ammonia nitrogen wastewater in the form of ammonia water, and realize resource utilization , which solves the problem of reuse of waste acidic ammonium-containing waste liquid that exists in membrane absorption and deamination, avoids secondary pollution, and the integrated membrane deamination method has the advantages of low investment, simple operation, convenient operation and management, and small footprint , low cost and other advantages

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  • Ammonia removal method by ammonia nitrogen wastewater membrane integration

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Embodiment 1

[0037] Containing NH 4 The ammonia nitrogen value of CL solution is 6200mg / L, and the pH value of wastewater is 9.2. Use 0.2moL / L N a The pH value of the OH solution is always adjusted to 10, the temperature is 30°C, and after filtering through a 5 μm filter, the flow rate of the vacuum deamination circulation pump is controlled to be 30L / h, and the vacuum degree is controlled to be 100kPa. Vacuum deamination membrane components and membrane absorption deamination membrane components are selected from polypropylene laboratory-made components: the porosity is 40%, the outer diameter of the membrane filament is 0.3mm, the inner diameter is 0.22mm, and the pore diameter is 0.02-0.08μm. The area is 0.18m 2 , The effective length of the membrane module is 100mm. Within 3 hours of vacuum deamination, the ammonia nitrogen in wastewater dropped from 6200mg / L to 1116mg / L, and the efficiency of vacuum deamination reached 82%. The ammonia gas removed by vacuum is continuously absorbe...

Embodiment 2

[0041] A kind of wastewater containing ammonium sulfate, the water temperature is 45°C, the ammonia nitrogen concentration is about 15000mg / L, the wastewater treatment capacity is 8 tons / hour, the pH value of the wastewater is 4.5, and the membrane integrated deamination process is used to remove ammonia. Construct one vacuum deamination circulation tank with an effective volume of 200 tons, one membrane absorption circulation tank with an effective volume of 40 tons, one absorbent circulation tank and one absorbent buffer tank with an effective volume of 10 tons.

[0042] First introduce the waste water into the vacuum deamination circulation tank, adjust the pH to 10.5-11 in the circulation tank with 30% (W / W, mass concentration) NaOH solution, and keep it, control the water temperature at 50°C, and use vacuum deamination The circulation pump pumps the ammonia nitrogen wastewater into the vacuum degassing membrane module system, which is filtered by 10 microns and 5 microns r...

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Abstract

The invention belongs to the technical field of wastewater ammonia removal, and particularly relates to a technical method for efficient membrane ammonia removal treatment on industrial high-ammonia containing wastewater by applying an integration membrane. According to the integration membrane ammonia removal method, a vacuum membrane ammonia removal and membrane absorption ammonia removal combined two-step ammonia removal method is used for realizing efficiently low-consumption ammonia removal of wastewater. The technical method comprises the steps of: firstly removing about 80% of ammonia nitrogen in the wastewater by using a vacuum membrane ammonia removal method, and then removing about 99% of remained ammonia nitrogen in the wastewater by adopting a membrane absorption ammonia removal method, thus the total ammonia removal efficiency exceeds 99%. Ammonia removed by the vacuum membrane ammonia removal method is used for preparing about 15% ammonia water by adopting an absorption method and is recycled for production. An acidic ammonia containing waste absorption liquid generated by adopting the membrane absorption ammonia removal method returns to a vacuum membrane ammonia removal unit and is mixed with a raw material, and then vacuum ammonia removal is carried out. The method has the advantages of having high ammonia nitrogen removal rate, realizing resource utilization, solving the problem of recycling the acidic ammonium containing waste liquid existing in a membrane absorption ammonia removal method, and avoiding secondary pollution.

Description

technical field [0001] The invention relates to the technical field of deamination of waste water, in particular to an integrated deamination method for high-efficiency membrane deamination treatment of industrial high-ammonia-containing waste water by applying an integrated membrane. Background technique [0002] As a common water and air pollution, ammonia nitrogen pollution will cause great harm to human health and the ecological environment. Ammonia nitrogen is one of the main oxygen-consuming pollutants in water bodies. It is directly discharged into water bodies, which is likely to cause water pollution. The amount of ammonia nitrogen wastewater in my country is large and wide, mainly from petrochemical, metallurgical, pharmaceutical, chemical fertilizer and other industrial wastewater, as well as human and animal excrement, domestic sewage, secondary effluent from waste treatment plants, etc. [0003] At present, the main technologies for treating ammonia nitrogen was...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/20C02F1/44C02F1/58C02F101/16
Inventor 王军王樟新
Owner 湖南海铭特种膜有限公司
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