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Method for synchronously treating human manure and urine and microbial desalting tank

A technology for simultaneous processing and human excrement, applied in the field of human excrement and urine processing

Active Publication Date: 2017-01-11
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the content of ammonia nitrogen in fresh urine is higher than the content of phosphate, so in the existing magnesium ammonium phosphate crystallization technology, magnesium ions and phosphate are basically added at the same time, and the amount of magnesium ions added is based on ammonia nitrogen. The benchmark can make the ammonia nitrogen in the urine reach the maximum recovery, and the recovery rate of ammonia nitrogen and phosphate is above 90%.
[0005] According to the existing technical solutions, although the crystallization technology of magnesium ammonium phosphate can recover ammonia nitrogen and phosphate in human urine to a certain extent, it needs to add a large amount of magnesium ions and phosphate

Method used

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  • Method for synchronously treating human manure and urine and microbial desalting tank

Examples

Experimental program
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Effect test

Embodiment 1

[0068] Take 1L of urine as the experimental sample, add magnesium chloride according to the ratio of the amount of magnesium ions and phosphate ions in the urine to 1:1, and after pretreatment with magnesium ammonium phosphate crystallization, the concentration of ammonia nitrogen in the urine is 374.5mg / L , the concentration of phosphate was 17.64mg / L, and the recoveries of ammonia nitrogen and phosphate were 30% and 93%, respectively.

[0069] The effluent pretreated by ammonium magnesium phosphate crystallization enters the desalination chamber of the microbial desalination tank; the crushed human feces and water are added to the anode chamber of the microbial desalination tank according to the volume ratio of 1:1 as fuel; 0.066mol / L K H 2 PO 4 and K of 0.035mol / L 2 HPO 4 ·3H 2 O was added to the cathode compartment of the microbial desalination cell as a buffer. When the hydraulic retention time is 6h, the concentrations of ammonia nitrogen and phosphate in the efflue...

Embodiment 2

[0071] Take 1L of urine as the experimental sample, add magnesium chloride according to the ratio of the amount of magnesium ions and phosphate ions in the urine to 1.3:1, and after pretreatment with magnesium ammonium phosphate crystallization, the concentration of ammonia nitrogen in the urine is 363.8mg / L , the concentration of phosphate was 12.6mg / L, and the recoveries of ammonia nitrogen and phosphate were 32% and 95%, respectively.

[0072] The effluent pretreated by ammonium magnesium phosphate crystallization enters the desalination chamber of the microbial desalination tank; the crushed human feces and water are added to the anode chamber of the microbial desalination tank according to the volume ratio of 0.9:1 as fuel; 0.036mol / L K H 2 PO 4 and K of 0.025mol / L 2 HPO 4 ·3H 2 O was added to the cathode compartment of the microbial desalination cell as a buffer. When the hydraulic retention time is 6h, the concentrations of ammonia nitrogen and phosphate in the eff...

Embodiment 3

[0074] Take 1L of urine as the experimental sample, add magnesium chloride according to the ratio of the amount of magnesium ions and phosphate ions in the urine to 1.5:1, and after pretreatment with magnesium ammonium phosphate crystallization, the concentration of ammonia nitrogen in the urine is 374.5mg / L , the concentration of phosphate was 17.64mg / L, and the recoveries of ammonia nitrogen and phosphate were 30% and 93%, respectively.

[0075] The effluent pretreated by ammonium magnesium phosphate crystallization enters the desalination chamber of the microbial desalination tank; the crushed human feces and water are added to the anode chamber of the microbial desalination tank according to the volume ratio of 1.1:1 as fuel; 0.05mol / L K H 2 PO 4 and K of 0.05mol / L 2 HPO 4 ·3H 2 O was added to the cathode compartment of the microbial desalination chamber as a buffer. When the hydraulic retention time is 6h, the concentrations of ammonia nitrogen and phosphate in the e...

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Abstract

The invention provides a method for synchronously treating human manure and urine. The method comprises the following steps: carrying out ammoniomagnesium phosphate crystallization pretreatment on human urine to obtain a crystallization pretreatment solution; and carrying out denitrification and dephosphorization treatment on the crystallization pretreatment solution and human manure by a microbial desalting tank, wherein the mass ratio of the magnesium ions in the ammoniomagnesium phosphate crystallization pretreatment process to the phosphate ions in the urine is (0.9-2):1. The method provided by the invention can treat ammonia nitrogen and phosphates in the human urine only by adding a small amount of magnesium ions. The experimental result on the method provided by the invention shows that the maximum removal rate for ammonia nitrogen in the urine can reach 94.4%, and the maximum removal rate for phosphates can reach 99%.

Description

technical field [0001] The invention relates to the technical field of human waste treatment, in particular to a method for synchronously treating human waste and a microbial desalination pool. Background technique [0002] Magnesium ammonium phosphate (Magnesium ammonium phosphate, MAP) crystallization method is a kind of treatment method of human urine commonly used, and its main principle is: by adding magnesium chloride hexahydrate in the urine, generate magnesium ammonium phosphate crystal, the urine in the urine Ammonia nitrogen and phosphate are collected and removed. The reaction equation of magnesium ammonium phosphate crystallization process is: [0003] Mg 2+ +NH 4+ +PO 4 3- +6H 2 O→MgNH 4 PO 4 ·6H 2 O↓. [0004] Fresh urine contains about 525mg / L of ammonia nitrogen, about 185mg / L of phosphate, and basically does not contain magnesium ions. The molecular formula of magnesium ammonium phosphate produced by crystallization is MgNH 4 PO 4 , It can be se...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F11/02H01M8/16
CPCC02F3/005C02F3/34C02F11/02C02F2001/5218C02F2203/006H01M8/16Y02E60/50
Inventor 张宝刚李云龙李家欣杨盟
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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