Method for recovering and removing nitrogen and phosphor in urine by ammoniomagnesium phosphate crystal method

A technology of magnesium ammonium phosphate and crystallization method, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve problems such as difficult recovery, and achieve the effects of fast reaction speed, simple operation and simple reaction process

Inactive Publication Date: 2010-08-25
SHENYANG JIANZHU UNIVERSITY
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Problems solved by technology

However, the current drainage system mixes urine with high concentration of nitrogen and phosphorus with other sewage, diluting the nutrients, and it is difficult to recover in the sewage treatment process

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  • Method for recovering and removing nitrogen and phosphor in urine by ammoniomagnesium phosphate crystal method
  • Method for recovering and removing nitrogen and phosphor in urine by ammoniomagnesium phosphate crystal method
  • Method for recovering and removing nitrogen and phosphor in urine by ammoniomagnesium phosphate crystal method

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Embodiment Construction

[0020] Figures 1-4 are photos of the state of recovered products and precipitates of the present invention, and their clarity does not affect the understanding of the technical solution of the present invention.

[0021] Due to the low C / N in urine, PO 4 3- The concentration is much greater than 10mg / L and NH 4 + High concentrations can inhibit microorganisms, so direct biological methods cannot achieve good nitrogen and phosphorus removal effects. Magnesium ammonium phosphate crystallization (MAP, also known as struvite) method is an effective technology for removing high-concentration ammonia nitrogen and high-concentration phosphate in wastewater. 4 + , PO 4 3- and Mg 2+ The reaction produces MgNH 4 PO 4 ·6H 2 O crystallization, a method of separation from wastewater by gravity settling. The high concentration of nitrogen and phosphorus in urine determines the feasibility of this method. It can simultaneously convert nitrogen and phosphorus, the two most importa...

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Abstract

The invention discloses a method for recovering and removing nitrogen and phosphor in urine by an ammoniomagnesium phosphate crystal method, relating to a method for recovering and removing the nitrogen and phosphor in urine and recovering the reaction product of the urine through urine source separation. The method for recovering and removing the nitrogen and phosphor comprises the following steps: evenly stirring the urine, regulating the pH value of the urine by utilizing NaOH solution the mass fraction of which is 10%, adding reaction precipitant, stirring, precipitating, filtering and drying to obtain the ammoniomagnesium phosphate crystal. Therefore, nitrogen and phosphor load on domestic sewage is reduced, and the product can also be utilized as manure for agriculture, so the method of the invention is a sustainable sewage disposal technology.

Description

technical field [0001] The invention relates to the technical field of ecological sanitation sewage resource utilization, in particular to a method for recovering and removing nitrogen and phosphorus in urine by ammonium magnesium phosphate crystallization. Background technique [0002] "Ecological sanitation" is a sewage management and sanitation system that embodies the characteristics of sustainability both ecologically and economically. It aims to promote the development of the existing sewage and waste collection and treatment systems towards a sustainable "circular economy". A new concept of ecological economy. Traditional urban sewage treatment is to mix various domestic sewage including feces and urine. As a result, the sewage has a high nitrogen and phosphorus load, which is difficult to be effectively removed by conventional activated sludge treatment processes. After the treated water with incomplete nitrogen and phosphorus removal is discharged into the water bo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/45
Inventor 傅金祥王智唐玉兰赵玉华马兴冠由昆张荣新周东旭
Owner SHENYANG JIANZHU UNIVERSITY
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