Method and system for treating high ammonia-nitrogen wastewater

A technology for ammonia nitrogen wastewater and high ammonia nitrogen, applied in water/sewage treatment, chemical instruments and methods, special compound water treatment, etc., can solve the problems of low ammonia nitrogen removal rate, limited industrial application, long reaction time, etc., and achieve ammonia nitrogen removal rate High, reusable, high value, easy to operate

Active Publication Date: 2017-10-13
中工环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there have been many studies on struvite precipitation, but there are common problems such as long reaction time and low removal rate of ammonia nitrogen, which seriously limit the industrial application of anaerobic fermentation method to treat wastewater

Method used

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  • Method and system for treating high ammonia-nitrogen wastewater
  • Method and system for treating high ammonia-nitrogen wastewater
  • Method and system for treating high ammonia-nitrogen wastewater

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Embodiment Construction

[0023] In order to enable those skilled in the art to better understand the technical solutions of the present invention, a method and system for treating high ammonia nitrogen wastewater provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0024] The action mechanism of the present invention is: by crystallizing the ammonia ion in the influent water and the magnesium ion and phosphate ion in the auxiliary solution according to an equal stoichiometric ratio to produce "struvite" (magnesium ammonium phosphate hexahydrate MAP) crystals to achieve The effect of reducing ammonia nitrogen in water can be expressed by the following equation:

[0025]

[0026]

[0027]

[0028] After crystallization, the treated low ammonia nitrogen wastewater and nano-scale magnesium ammonium phosphate crystals are separated by gravity to achieve solid-liquid separation.

[0029] The method for treating ammonia and nitrogen in wastewater propose...

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Abstract

The invention discloses a method and system for treating high ammonia-nitrogen wastewater. By taking effluent water containing high ammonia nitrogen content after anaerobic fermentation as influent water and taking a phosphate and magnesium salt mixed solution as an auxiliary solution, a liquid-liquid hypergravity reactor is utilized to enhance the mass transfer effect during mixing of the two liquid phases; crystallized and settling magnesium ammonium phosphate crystals are collected at the bottom of the reactor by means of the reaction-settlement integrated hypergravity reactor while the two liquid phases react; the liquid phases after the reaction overflow at the top of the reactor to produce effluent water; and the magnesium ammonium phosphate crystals are discharged at the bottom of the reactor.

Description

Technical field [0001] The invention belongs to the technical field of wastewater treatment, and specifically relates to a method and system for processing high ammonia nitrogen wastewater. A liquid-liquid supergravity reactor mixes high ammonia nitrogen wastewater with a phosphate solution and a magnesium salt solution to quickly generate magnesium ammonium phosphate. The "dung stone" crystal is a method of reducing ammonia nitrogen in wastewater and recycling ammonia nitrogen for reuse. Background technique [0002] The method of using microorganisms to treat wastewater has been almost mature in my country. Among them, anaerobic fermentation is a commonly used wastewater treatment method, but the ammonia nitrogen content in the effluent is very high during the treatment process. As the water contains a small amount of magnesium ions and phosphate ions, magnesium ammonium phosphate precipitates in pumps, pipelines and other equipment during the transportation process and adhere...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/58B01J19/18B01J19/32C01B25/45C02F101/16
CPCB01J19/1806B01J19/32B01J2219/32286C01B25/451C02F1/586C02F2101/16C02F2305/04
Inventor 苏本生徐圣凯马欣欣王雯刘广青
Owner 中工环境科技有限公司
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