Multi-technique coupling bio-toilet feces treatment system with subcritical hydrothermal liquidation as key point and method

A subcritical water and treatment system technology, applied in water/sewage multi-stage treatment, anaerobic digestion treatment, pyrolysis treatment of sludge, etc., can solve the problem of low harmless efficiency, long treatment period and low resource utilization efficiency and other problems, to ensure the effect of biological safety, fast reaction speed and strong biodegradability

Pending Publication Date: 2018-09-28
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, at present, domestic feces and urine are mostly treated with biological methods (aerobic activated sludge method, high-temperature rapid composting, etc.), and the traditional treatment technology has low harmless efficiency and long treatment cycle, which has great environmental and health risks.
[0005] Therefore, there is an urgent need for a treatment system and process that can solve the problems of low environmental acceptance rate of urban waste, incomplete harmlessness, and low efficiency of resource utilization

Method used

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  • Multi-technique coupling bio-toilet feces treatment system with subcritical hydrothermal liquidation as key point and method
  • Multi-technique coupling bio-toilet feces treatment system with subcritical hydrothermal liquidation as key point and method
  • Multi-technique coupling bio-toilet feces treatment system with subcritical hydrothermal liquidation as key point and method

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Experimental program
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Effect test

Embodiment 1

[0060] see figure 1 , The ecological toilet excrement and urine treatment system of the present invention is aimed at the situation that fecal matter and urine are treated separately, that is, what is stored in the material buffer tank 1 is fecal matter, and what is stored in the urine buffer tank 9 is urine.

[0061] It includes a material buffer tank 1 connected to a toilet or urinal, a subcritical hydrothermal liquefaction unit 2, a dry granulation unit 3, a high-temperature anaerobic unit 4, a biogas utilization unit 5, a combined membrane process unit 6, and a solid-liquid separation device 7 , struvite crystallization unit 8, urine buffer tank 9 and gas treatment unit 10.

[0062] Material buffer tank 1, subcritical hydrothermal liquefaction unit 2, dry granulation unit 3, high-temperature anaerobic unit 4 and biogas utilization unit 5 are connected sequentially through pipelines, urine buffer tank 9, struvite crystallization unit 8, solid-liquid The separation device 7...

Embodiment 2

[0075] The difference between this embodiment and embodiment 1 is as figure 2 As shown, the specific differences are as follows:

[0076] The feces and urine concentrate enter the material buffer tank for pre-crushing, mixing and homogenization, so that the water content and viscosity of the mixed material meet the pumping conditions, and the pH is adjusted to 7.5-12.

[0077] When the homogeneous material in the material buffer tank 1 enters the subcritical hydrothermal liquefaction unit 2, a catalyst and an oxidant are added to the subcritical hydrothermal liquefaction unit 2, and the temperature is controlled at 180°C to 260°C to achieve inactivation of pathogens, etc. The molecular level is completely decomposed into CO 2 .

[0078] In addition to the heat generated by the biogas utilization unit 5 for the subcritical hydrothermal liquefaction unit 2, part of the biogas can be used for power generation, heat supply and other purposes.

[0079] The harmless mixed materi...

Embodiment 3

[0081] see image 3 , Different from Embodiment 1 and Embodiment 2, this embodiment is aimed at the situation that: the material buffer tank 1 stores a mixture of excrement and urine.

[0082] Material buffer tank 1, subcritical hydrothermal liquefaction unit 2, dry granulation unit 3, high temperature anaerobic unit 4, urine buffer tank 9, struvite crystallization unit 8, solid-liquid separation device 7 and composite membrane process unit 6 pass The pipelines are connected in sequence, and the combined membrane process unit 6 is connected to the material buffer tank 1; the high-temperature anaerobic unit 4 is also connected to the gas treatment unit 10 and the biogas utilization unit 5 respectively.

[0083] The method for utilizing the system of this embodiment to process the mixture of feces and urine specifically includes the following steps:

[0084] 1) The mixture of feces and urine enters the material buffer tank 1 for pre-crushing and homogenization, and adjusts the ...

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Abstract

The invention discloses a multi-technique coupling bio-toilet feces treatment system with subcritical hydrothermal liquidation as a key point and a method and belongs to the technical field of chemical engineering and environment protection. The system comprises a material buffer tank, a subcritical hydrothermal liquidation unit, a drying pelletizing unit, a high-temperature anaerobic unit, a biogas utilization unit, a combined membrane process unit, a solid-liquid separation device, a struvite crystallization unit, a urea buffer tank and a gas treatment unit. By adopting the system, a subcritical hydrothermal liquidation technique is adopted as a key point, and with the combination of a high-temperature anaerobic process and biogas recycling, heat balance can be achieved; on the basis ofseparation properties of the combined membrane process unit, biosecurity of produced water for landscaping can be ensured. Feces substances are harmlessly treated and stabilized into an organic fertilizer, nitrogen and phosphorus in urea are recycled in a mode of struvite, water in excrement and urea is harmlessly treated and recycled as landscaping water, and smell is subjected to high-temperature combustion treatment, so that harmless treatment on gases, liquids and solids is achieved, and good economic benefits and economic benefits can be achieved.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and environmental protection, and in particular relates to a multi-technology coupling ecological toilet excrement and urine treatment system and method with subcritical hydrothermal liquefaction as the core. Background technique [0002] my country has a large population. With the improvement of living standards, the amount of feces produced by cities is increasing. Many cities have begun to pay attention to the treatment of feces. In the past, most of the manure was transported to agricultural production and used as fertilizer. With the large-scale operation of agricultural production, the agricultural production efficiency of manure is low, coupled with the extensive use of chemical fertilizers, and the requirements of sanitation and epidemic prevention in many large cities, manure cannot be directly fertilized without being matured, so the amount of manure accepted is decreasing day ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/10C02F9/14
CPCC02F1/44C02F3/28C02F11/10
Inventor 王树众雷杰杨闯徐甜甜杨健乔赵军
Owner XI AN JIAOTONG UNIV
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