Membrane distillation system and method for resource recovery of urine

A technology of resource recovery and membrane distillation, which is applied in the field of membrane distillation systems for urine resource recovery, can solve problems such as inability to achieve resource recovery well, and achieve the effect of reduction

Inactive Publication Date: 2020-07-28
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the way of recycling urine is mainly to use it as fertilizer after decomposing, but this method has certain limitations and cannot realize resource recovery well.

Method used

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  • Membrane distillation system and method for resource recovery of urine

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Effect test

Embodiment 1

[0035] Such as figure 1 As shown, Embodiment 1 of the present invention provides a membrane distillation process system and method for recycling urine resources, mainly active separation of sanitary appliances 1, heating device 2, membrane distillation device 3, crystallization device 4, condensation device, etc. composition.

[0036] In embodiment 1, the urine is separated by the source separation sanitary appliance 1; the source separation sanitary appliance 1 is connected to the heating device 2; the urine is heated by the heating device 2 and then imported into the membrane distillation device 3; The feed side is concentrated and then poured into the crystallization device 4; the condensation side of the membrane distillation device 3 is connected in series with the condensation device 5, so that the temperature on the condensation side is controlled at 15-20 °C; under the action of the vapor pressure difference, water vapor permeates the hydrophobic membrane on the cold w...

Embodiment 2

[0040] Such as figure 1As shown, in the membrane distillation process system and method for resource recovery of urine provided in Example 2, the source separation sanitary appliance is to separate feces and urine; the heating device is used to raise the temperature of urine, which is the follow-up membrane distillation device Provide raw material liquid; membrane distillation device is the main recovery device for urine, mainly composed of feed side, hydrophobic membrane, air gap side and reflux water side, the urine enters the feed side after heating, due to the feed side and reflux water The temperature difference on the side forms a vapor pressure difference, and water vapor enters the air gap side through the hydrophobic membrane, and is condensed on the air gap side by the low temperature of the reflux water side to form liquid water to realize water recovery; the crystallization device is concentrated on the feed side of the membrane distillation device The urine is cry...

Embodiment 3

[0044] Such as figure 1 As shown, a source separation urine nitrogen and phosphorus recovery and water reuse system and method provided in Example 3 includes the following steps:

[0045] Step 1. The urine flows into the heating device through the source separation sanitary appliance, so that the temperature of the urine rises to above 50°C;

[0046] Step 2. The heated urine flows into the membrane distillation device through flowmeter control, the urine is concentrated on the feed liquid side, and the water vapor is condensed on the air gap side through the hydrophobic membrane;

[0047] Step 3. The concentrated urine is poured into the crystallization device to form solid fertilizer through crystallization.

[0048] Step 4, the high-purity water formed after the condensation of water vapor can be used for toilet flushing, irrigation or further treatment;

[0049] Step 5: The membrane distillation condensed water is connected to the condensed water device on the side, and t...

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Abstract

The invention provides a membrane distillation system and method for resource recovery of urine, belonging to the technical field of water treatment. According to the invention, source separation of urine is conducted by utilizing a source separation sanitary appliance; a heating device is arranged to heat the urine and provide raw liquid for a subsequent membrane distillation device; the membranedistillation device is arranged as a main recovery device of the urine and is mainly composed of a feeding side, a hydrophobic membrane, an air gap side and a backflow water side; the urine enters the feeding side after being heated, a steam pressure difference is formed due to a temperature difference between the feeding side and the backflow water side, steam penetrates through the hydrophobicmembrane to enter the air gap side, and the steam is condensed to form liquid water at the air gap side under the influence of low temperature of the backflow water side to achieve water recycling; and a crystallization device is arranged to crystallize the concentrated urine on the feeding side of the membrane distillation device, so urea, nitrogen and phosphorus are recycled.

Description

technical field [0001] The invention relates to the technical field of recovery and treatment of urine resources, in particular to a membrane distillation system and method for recovery of urine resources. Background technique [0002] Studies have shown that in human daily sewage, urine provides 90% of nitrogen, 50% of phosphorus and 10% of COD in domestic sewage, and is the main source of nitrogen and phosphorus in domestic sewage. Traditional biochemical treatment methods treat domestic sewage and remove nitrogen, phosphorus and other resources in sewage, which not only produces more losses, but also wastes resources in domestic sewage, especially urine. Therefore, separating and collecting urine from the source can greatly reduce the difficulty of domestic sewage treatment, and it is also conducive to the recovery of resources in urine at the source. Nutrients such as urea, nitrogen, and phosphorus in urine can be returned to farmland and vegetable fields as fertilizer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/08
CPCC02F1/08
Inventor 姚宏胡智丰
Owner BEIJING JIAOTONG UNIV
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