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Source separation urine treatment system and method

A technology of treatment system and source separation, applied in the field of source separation urine treatment system, can solve the problems of not realizing sewage resource utilization, poor economy, huge environmental and ecological harm, etc.

Active Publication Date: 2022-07-01
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, the main way to treat urine is to use mixed treatment with urban sewage, but the treatment process adopted by sewage treatment plants is mainly based on removal, which has not realized the recycling of sewage, which seriously wastes resources
[0003] A large number of researchers regard urine as the main research object. For example, the Chinese invention patent CN102167434A discloses a method for recovering nitrogen and phosphorus in urine. The nitrogen and phosphorus in urine are formed into struvite, and the recovery rate reaches more than 95%. , but the abuse of antibiotics leads to a large amount of drugs remaining in urine wastewater. The process of forming struvite will simultaneously adsorb antibiotics to its surface and return them to the soil, which will lead to the migration of antibiotics in urine into nature, which is harmful to the environment and Huge ecological hazard; Chinese patent CN110015792A discloses a photocatalytic urine treatment and recycling device, which has high manufacturing cost, high energy consumption and poor economy

Method used

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  • Source separation urine treatment system and method

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preparation example Construction

[0030] The source separation urine treatment system provided by the present invention includes a nutrient element recovery system connected with the water recovery system. In the present invention, the nutrient element recovery system is filled with adsorption material, and the adsorption material includes iron-based biochar material; the present invention has no special requirements on the specific structure of the nutrient element recovery system. In the present invention, the preparation method of the iron-based biochar material preferably includes the following steps:

[0031] (1) pyrolysis and carbonization of biomass material to obtain biomass porous carbon material;

[0032] (2) Impregnating the biomass porous carbon material in a ferric nitrate solution, adjusting the pH value of the obtained impregnating feed solution to strong alkaline, and performing a hydrothermal reaction to obtain the iron-based biochar material.

[0033] In the present invention, the biomass ma...

Embodiment 1

[0053] A source separation urine treatment system such as figure 1 As shown, it consists of a water recovery system, a nutrient recovery system and an antibiotic removal system. use figure 1 The system shown processes source separated urine as follows:

[0054] First, the stored source-separated urine is injected into the water recovery system by a pump to realize water recovery and urine concentration: the water recovery system is a membrane distillation (polytetrafluoroethylene membrane) process, and the temperature of the urine is raised to 50 °C using a heating device. ℃, the vapor pressure difference required by the membrane distillation process is reached, and the urine is concentrated on the feed side, and the concentration rate is 40% (that is, the ratio of the volume of urine after membrane distillation to the volume of urine before membrane distillation), which is convenient for subsequent resources. chemical and harmless treatment;

[0055] Then, the concentrated...

Embodiment 2

[0058] A source separation urine treatment system such as figure 1 As shown, it consists of a water recovery system, a nutrient recovery system and an antibiotic removal system. use figure 1 The system shown processes source separated urine as follows:

[0059] First, use a pump to inject the stored source-separated urine into the water recovery system to achieve water recovery and urine concentration: the water recovery system is a membrane distillation (polytetrafluoroethylene membrane) process, and a heating device is used to raise the urine temperature to 55 °C ℃, the vapor pressure difference required by the membrane distillation process is reached, and the urine is concentrated on the feed side, and the concentration rate is 50% (that is, the ratio of the volume of urine after membrane distillation to the volume of urine before membrane distillation), which is convenient for subsequent resources. chemical and harmless treatment;

[0060] Then, the concentrated urine i...

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Abstract

The invention provides a source separation urine treatment system and method, and relates to the technical field of sewage treatment. The source separation urine treatment system provided by the invention comprises a water recovery system, a nutrient element recovery system and an antibiotic removal system which are connected in sequence. According to the invention, a membrane distillation device is arranged in the water recovery system, so that water in the source separation urine can be recovered, the urine is concentrated, the concentration of substances in the urine is improved, and subsequent treatment is facilitated; the nutrient element recovery system takes an iron-based biochar material as an adsorption material to adsorb and recover nutrient elements in the urine, so as to realize resourceful treatment of the urine; according to the antibiotic removal system, a mushroom dreg biochar catalyst serves as a catalytic material and cooperates with an oxidizing agent to conduct catalytic oxidation on urine, antibiotics in the urine are degraded, and harmless treatment of the urine is achieved. When the system provided by the invention is used for treating the source separation urine, the low-carbon resource harmless treatment of the source separation urine can be realized.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a source separation urine treatment system and method. Background technique [0002] As a kind of domestic sewage, urine accounts for about 2% of urban sewage. At the same time, urine is rich in a large number of nutrients, and its recycling and reuse are of great significance. However, the main way to treat urine at present is to use mixed treatment with urban sewage, but the treatment process adopted by the sewage treatment plant is mainly based on removal, and does not realize the recycling of sewage, which is a serious waste of resources. [0003] A large number of researchers take urine as the main research object. For example, Chinese invention patent CN102167434A discloses a method for recovering nitrogen and phosphorus in urine. The nitrogen and phosphorus in urine are formed into struvite, and the recovery rate reaches more than 95%. However, the abuse of antib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04B01J23/04B01J20/20B01J20/30
CPCC02F9/00B01J23/04B01J20/20C02F1/725C02F1/283C02F1/447
Inventor 不公告发明人
Owner BEIJING JIAOTONG UNIV