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Process for treating and recycling ammonia nitrogen wastewater

An ammonia nitrogen wastewater and process technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, infiltration/dialysis water/sewage treatment, etc., can solve secondary pollution, non-compliance with clean production requirements, pollutants There are no problems such as recycling, and the effects of preventing secondary pollution, high permeation speed and desalination performance, and reducing investment and operating costs are achieved.

Active Publication Date: 2012-07-11
HANGZHOU BLUETEC ENVIRONMENTAL TECH +1
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AI Technical Summary

Problems solved by technology

Not only is it easy to cause secondary pollution, but the pollutants have not been recycled, which does not meet the requirements of clean production
[0004] Most domestic ammonia nitrogen wastewater treatment does not systematically analyze the process characteristics in the processing process from the perspectives of clean production, water balance, and resource recovery, and conduct comprehensive wastewater treatment

Method used

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  • Process for treating and recycling ammonia nitrogen wastewater
  • Process for treating and recycling ammonia nitrogen wastewater

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Embodiment Construction

[0014] The ammonia-nitrogen wastewater entering the process of the present invention should preferably be pre-treated first. The pre-treatment can adopt the traditional treatment method for ammonia-nitrogen wastewater --- precipitation separation, so that the wastewater is pre-treated to the following indicators: CODcr: 60-100mg / l; suspended solids content: below 100 mg / l; pH: 6-9. The above parameters can also be adjusted according to the needs of subsequent processing.

[0015] With reference to the accompanying drawings, the ammonia nitrogen wastewater entering the process of the present invention is first processed in step (1): the ammonia nitrogen wastewater is treated with an ultrafiltration system, and small particle suspended matter and colloids are removed by ultrafiltration (UF); in step (1) In the process, the recovery rate of ultrafiltration is controlled at more than 90%, and the removal rate of the total suspended solids TSS reaches more than 90%. The above par...

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Abstract

The invention provides a process for treating and recycling ammonia nitrogen wastewater. In the process, the ammonia nitrogen wastewater is treated by an ultrafiltration system. The process has the energy conservation characteristics that: combination is reasonable, investment cost and operation cost are reduced, water resources in the wastewater are efficiently separated by membrane separation technology, the process is performed at normal temperature, phase change is avoided and the like. The wastewater passes through a membrane and then is recycled, ammonium salt in the wastewater is treated at proper time, waste materials are changed into things of value, and external zero emission is realized. The nanofiltered concentrated water flows back to the inlet side of electroosmosis to be treated, so that external wastewater zero emission is realized and the ammonium salt is collected furthest.

Description

technical field [0001] The invention relates to a process for treating and recycling ammonia nitrogen wastewater. Background technique [0002] With the rapid development of my country's industry, the production of ammonia nitrogen wastewater has more and more serious impact on the environment, and the large discharge of ammonia nitrogen and chloride ions will cause great harm to the environment. Excessive concentration of ammonia nitrogen in the water body will lead to rich oxidation of the water body, deterioration of water resources, and at the same time, it will also have a certain impact on human health. The massive discharge of chloride ions will also lead to changes in soil structure, which will cause great harm to crops and underground buildings. At present in our country, the treatment of ammonia nitrogen wastewater is still a problem to be solved urgently. Therefore, it is of great practical significance to study the technology of treating ammonia nitrogen wastewa...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06C02F1/469C02F1/44C02F101/16
Inventor 楼永通李嘉
Owner HANGZHOU BLUETEC ENVIRONMENTAL TECH
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