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Method and equipment for treating ammonia-nitrogen wastewater

A treatment method and wastewater treatment technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of poor versatility, poor treatment effect, narrow application range, etc., to achieve Ease of expansion, stable continuous operation, and reduced production costs

Inactive Publication Date: 2017-01-04
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0009] At present, in actual projects, a single treatment process is mostly used to treat high ammonia nitrogen wastewater, but there are the following deficiencies: poor treatment effect, narrow application range and poor versatility

Method used

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  • Method and equipment for treating ammonia-nitrogen wastewater

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Embodiment Construction

[0034] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0035] 1) pH adjustment stage: the waste water enters the adjustment tank (1) through the water inlet pipe (1-1) and is mixed with sodium hydroxide solution to adjust the pH value to between 10 and 11;

[0036] 2) Blow-off stage: send the waste water with adjusted pH value into the blow-off tower (3), air enters from the bottom of the blow-off tower (3), and carry out three-stage blow-off successively to the waste water, and the blow-off tower (3) The tail gas is collected into the tail gas treatment device (3-6) through the tail gas collection pipeline (3-5);

[0037] 3) struvite precipitation reaction stage: the waste water after the above blow-off treatment is sent into the struvite precipitation reactor (5), and magnesium chloride and disodium hydrogen phosphate are added to form magnesium ammonium phosphate precipitation with the ammonia nitrogen in...

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Abstract

The invention discloses a method and equipment for treating ammonia-nitrogen wastewater. The method for treating the wastewater comprises the following steps of a pH regulating stage, an air stripping reaction stage, a struvite settling reaction stage, a deep treatment stage and a sludge discharging stage in sequence. The equipment mainly comprises a regulating tank, an air stripping tower, a struvite settling reactor, a zeolite filter and a water producing tank which are sequentially connected in series. The method and equipment for treating the ammonia-nitrogen wastewater have the advantages that through pH value regulation, ammonia and nitrogen in the wastewater are converted into a free state and then are stripped through air introduced into the wastewater, and ammonia and nitrogen remaining in the wastewater are removed and recycled through a struvite settling reaction method; finally, a zeolite adsorption tower is used for adsorption, ammonia and nitrogen in the wastewater are deeply removed, and it is ensured that produced water is discharged up to the standard; the method and equipment for treating the ammonia-nitrogen wastewater are stable in treatment effect, simple in technological process, high in ammonia-nitrogen removing rate, short in reaction time, small in occupied area and the like.

Description

technical field [0001] The invention relates to a method and equipment for organic industrial wastewater, in particular to a method and equipment for treating ammonia nitrogen wastewater. Background technique [0002] Due to serious water pollution, wastewater containing ammonia nitrogen must be treated to meet the standard before it can be discharged. For the treatment of ammonia nitrogen wastewater, technologies such as stripping method, ion exchange method, struvite precipitation reaction method, biological method, evaporation method, reverse osmosis method and ion exchange method can be used. [0003] The stripping method can be used to remove dissolved gases and certain volatile substances in wastewater. This method is to pass the gas into the wastewater, make it fully contact with the wastewater, make the dissolved gas and some volatile solutes in the wastewater pass through the gas-liquid interface, and transfer to the gas phase, so as to achieve the purpose of remov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 曹井国林玉科刘肖宁立群杨宗政于俊利
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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