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A method and system for treating high ammonia nitrogen wastewater

An ammonia nitrogen wastewater, high ammonia nitrogen technology, applied in water/sewage treatment, chemical instruments and methods, special compound water treatment and other directions, can solve the problems of limited industrial application, low ammonia nitrogen removal rate, long reaction time, etc., to achieve reuse value High, high ammonia nitrogen removal rate, convenient operation effect

Active Publication Date: 2020-11-20
中工环境科技有限公司
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  • 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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  • A method and system for treating high ammonia nitrogen wastewater
  • A method and system for treating high ammonia nitrogen wastewater
  • A 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 solution 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 mechanism of action of the present invention is: by crystallizing the ammonium ions in the influent and the magnesium ions and phosphate ions in the auxiliary solution according to the equistoichiometric ratio to generate "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 used to achieve solid-liquid separation by gravity.

[0029] In the wastewater ammonia nitrogen treatment method pr...

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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 treating high ammonia nitrogen wastewater. A liquid-liquid supergravity reactor quickly generates ammonium magnesium phosphate "bird" after mixing high ammonia nitrogen wastewater with phosphate solution and magnesium salt solution. Bezoar" crystals are a method to reduce ammonia nitrogen in wastewater and recover ammonia nitrogen for reuse. Background technique [0002] The method of using microorganisms to treat wastewater has developed almost mature in our country. Among them, anaerobic fermentation is a widely used wastewater treatment method at present, but the ammonia nitrogen content in the effluent during the treatment process is very high. Since the water contains a small amount of magnesium ions and phosphate ions, magnesium ammonium phosphate precipitates will be produced in the pumps, pipelines and other equipment durin...

Claims

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Application Information

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Patent Type & Authority Patents(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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