CN115417548A - Black water in-situ recycling method and equipment - Google Patents

Black water in-situ recycling method and equipment Download PDF

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Publication number
CN115417548A
CN115417548A CN202211062408.2A CN202211062408A CN115417548A CN 115417548 A CN115417548 A CN 115417548A CN 202211062408 A CN202211062408 A CN 202211062408A CN 115417548 A CN115417548 A CN 115417548A
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water
solid
communicated
manure
adsorption
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蒋进元
谭伟
宋浩洋
赫昶钧
石冬妮
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Chinese Research Academy of Environmental Sciences
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/10Treatment of sludge; Devices therefor by pyrolysis
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/13Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05DINORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
    • C05D9/00Other inorganic fertilisers
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/02Treatment of water, waste water, or sewage by heating
    • C02F1/04Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/08Thin film evaporation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/283Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Water Treatment By Sorption (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)

Abstract

The invention belongs to the technical field of black water treatment and recycling, and discloses a black water in-situ recycling method and equipment, wherein the equipment comprises the following steps: the source separation toilet is used for separating brown water and yellow water; the solid-liquid separation device is used for carrying out solid-liquid separation on the brown water to obtain separated water and solid; the drying and pyrolysis device is communicated with a solid outlet of the solid-liquid separation device; the regulating tank is communicated with the yellow water outlet of the source separation urinal and is used for regulating the water quantity and the water quality of the separated water and the yellow water to obtain mixed water; the carbon storage device is communicated with the drying pyrolysis device and is used for storing the manure-based biochar; the adsorption device is respectively communicated with the regulating tank and the carbon storage device and is used for adsorbing the mixed water by the excrement-based biochar to obtain semi-treated water; the middle water tank is respectively communicated with the adsorption device and the heater; the membrane distillation device is communicated with the adsorption device; and the water storage tank is communicated with the distillation device. The method realizes the recycling of the treatment of the excrement and the urine.

Description

Black water in-situ recycling method and equipment
Technical Field
The invention relates to the technical field of black water treatment and recycling, in particular to a black water in-situ recycling method and equipment.
Background
The description of the background of the invention pertaining to the related art to which this invention pertains is given for the purpose of illustration and understanding only of the summary of the invention and is not to be construed as an admission that the applicant is explicitly or implicitly admitted to be prior art to the date of filing this application as first filed with this invention.
As is well known, china is one of the countries with water shortage in the world, the per-capita water resource occupancy is only 1/4 of that in the world, and the water resource shortage and pollution problems seriously affect the national economic construction and normal life of people in China. The main component of the domestic sewage is the toilet flushing sewage which is increasingly paid more attention by people. The traditional water flush toilet almost uses clean water, 6-10L of water is used each time, and 2% of excrement is actually diluted by 98% of water, in other words, 2% of excrement pollutes 98% of water. If the toilet flushing sewage is not properly treated, the toilet flushing sewage is foul and smelly and causes a large amount of breeding of flies; feces can not be harmlessly treated, and intestinal infectious diseases and parasitic diseases are easily spread. Therefore, the requirements of increasing the living standard of people and developing economy can be met only by breaking through the limitation of the traditional flushing type toilet, developing the circulating water flushing recycling ecological toilet and realizing the source treatment and recycling of the flushing sewage.
The ecological toilet is a toilet which does not pollute the environment, can fully utilize various resources and emphasizes the concepts and functions of pollutant purification and resource recycling. At present, the research on the ecological toilet at home and abroad mainly comprises biological self-purification, biological fermentation, physical purification, manure packaging and the like. However, the current ecological toilet has the problem that the recycled materials cannot be fully utilized and recycled. Therefore, how to recycle the excrement from the source, prevent and treat the excrement pollution, and improve the recycling utilization rate and the economic benefit is a hot spot and a difficult point of current attention.
Disclosure of Invention
The embodiment of the invention aims to solve the problems of low resource utilization rate, poor economic benefit and the like of the existing ecological toilet and provides a fecaluria resource device and a method of a pyrolysis device coupled with an adsorption-membrane distillation device.
The purpose of the embodiment of the invention is realized by the following technical scheme:
the in-situ black water recycling equipment comprises:
the source separation toilet is used for separating the source to obtain brown water and yellow water;
the solid-liquid separation device is communicated with the brown water outlet of the source separation urinal and is used for carrying out solid-liquid separation on the brown water to obtain separated water and solids;
the drying and pyrolysis device is communicated with a solid outlet of the solid-liquid separation device and is used for drying and pyrolyzing the solid to obtain the manure-based biochar;
the regulating tank is communicated with the yellow water outlet of the source separation urinal and is used for regulating the water quantity and the water quality of the separated water and the yellow water to obtain mixed water;
the carbon storage device is communicated with the drying pyrolysis device and is used for storing the manure-based biochar;
the adsorption device is respectively communicated with the regulating tank and the carbon storage device and is used for adsorbing the mixed water through the manure-based biochar to obtain semi-treated water;
the middle water tank is respectively communicated with the adsorption device and the heater and is used for storing the semi-processed water;
the membrane distillation device comprises a heater, a series membrane module, a heat exchanger and a heat exchanger water injection tank, is communicated with the adsorption device and is used for distilling the semi-treated water to obtain recycled water;
and the water storage tank is communicated with the distillation device and is used for storing the reuse water.
A method for recycling excrement and urine comprises the following steps:
performing source separation on black water to obtain brown water and yellow water, performing solid-liquid separation on the brown water to obtain separated water and solid, mixing the separated water and the yellow water, adjusting the water quantity and the water quality to obtain mixed water, and drying and pyrolyzing the solid to obtain the manure-based biochar; and feeding the mixed water into an adsorption device for adsorption to obtain semi-treated water, and filtering the semi-treated water through membrane distillation to obtain recycled water.
Further, the obtained solid is dried and pyrolyzed to obtain the manure-based biochar, and the manure-based biochar is obtained by mixing, drying and pyrolyzing the solid and cellulose or hemicellulose substances.
Further, the manure-based biochar is sent into the adsorption device for adsorption of the yellow water and the separated water.
Further, the manure-based biochar is used for preparing ecological fertilizers.
Further, the manure-based biochar in the adsorption device is adsorbed and then used for preparing ecological fertilizer.
Further, the reuse water is stored in the tank for flushing the toilet.
The embodiment of the invention has the following beneficial effects:
1) The functions of in-situ treatment and resource utilization of solid excrement, collection and recycling of urine and the like are realized;
2) The brown water passes through a solid-liquid separation device, so that the solid enters a high-temperature furnace to be carbonized into biochar, and the biochar is added into an adsorption pretreatment device to be utilized, thereby realizing the circulation of the brown water in a toilet system. In addition, the high-temperature pyrolysis of the excrement can kill germs in the excrement.
3) The adsorption pretreatment aims at adsorbing a part of nutrient substances (38.6 percent of the nutrient substances can be adsorbed) in the yellow water, reducing membrane pollution while carrying out resource utilization, and reducing ammonia volatilization of membrane distillation.
4) The excrement-based biochar in the adsorption device is used for preparing ecological fertilizer after adsorption, so that in-situ recycling of the excrement source of the toilet is realized, secondary pollution and economic cost caused by excrement collection and transportation are reduced, and economic, environmental and social benefits are remarkable.
Drawings
FIG. 1 is a flow chart of the black water in-situ recycling method and the recycling method in the black water in-situ recycling device;
FIG. 2 is a schematic structural diagram of a recycling device in the black water in-situ recycling method and apparatus of the present invention.
Detailed Description
The present application is further described below with reference to examples.
In the following description, different "one embodiment" or "an embodiment" refers to different embodiments, but not necessarily the same embodiment, in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art. Various embodiments may be replaced or combined, and other embodiments may be obtained according to the embodiments without creative efforts for those skilled in the art.
With reference to fig. 2, an in-situ recycling apparatus for black water includes:
the source separation toilet is used for separating the source to obtain brown water and yellow water;
the solid-liquid separation device 1 is communicated with the brown water outlet of the source separation urinal and is used for carrying out solid-liquid separation on the brown water to obtain separated water and solids;
the drying and pyrolysis device 11 is communicated with a solid outlet of the solid-liquid separation device 1 and is used for drying and pyrolyzing the solid to obtain the manure-based biochar;
the adjusting tank 2 is communicated with the yellow water outlet of the source separation urinal and is used for adjusting the water quantity and the water quality of the separated water and the yellow water to obtain mixed water;
the carbon storage device 13 is communicated with the drying pyrolysis device 11 and is used for storing the manure-based biochar;
the adsorption device 12 is respectively communicated with the regulating tank 2 (the middle of which is connected with a water passing pump 3) and the carbon storage device and is used for adsorbing the mixed water by the manure-based biochar to obtain semi-treated water;
an intermediate water tank 10 which is respectively communicated with the adsorption device 12 and the heater 9 and is used for storing the semi-processed water;
the membrane distillation device comprises a heater 9, a series membrane module 8, a heat exchanger 4 and a heat exchanger water injection tank 5, is communicated with the adsorption device 12, and is used for distilling the semi-treated water to obtain recycled water;
and the water storage tank 6 is communicated with the membrane distillation device (a vacuum pump 7 is arranged in the middle) and is used for storing the reuse water.
With reference to the attached drawing 1, a method for recycling excrement and urine comprises the following steps:
performing source separation on black water to obtain brown water and yellow water, performing solid-liquid separation on the brown water to obtain separated water and solid, mixing the separated water and the yellow water to obtain mixed water, and drying and pyrolyzing the solid to obtain the manure-based biochar; and feeding the mixed water into an adsorption device for adsorption to obtain semi-treated water, and filtering the semi-treated water through membrane distillation to obtain recycled water.
The brown water passes through a solid-liquid separation device, so that the solid enters a high-temperature furnace to be carbonized into biochar, and the biochar is added into an adsorption pretreatment device for utilization, thereby realizing the circulation of the brown water in a toilet system. In addition, the excrement can be killed by pyrolyzing the excrement at high temperature.
The adsorption pretreatment aims at adsorbing a part of nutrient substances (38.6 percent of the nutrient substances can be adsorbed) in the yellow water, reducing membrane pollution while carrying out resource utilization, and reducing ammonia volatilization of membrane distillation.
In some embodiments of the present invention, the drying and pyrolyzing the obtained solid to obtain the fecal biochar is mixing the solid with cellulose or hemicellulose substances, drying and pyrolyzing the mixture to obtain the fecal biochar.
Cellulose or hemicellulose, and biochar prepared by carbonizing the cellulose or hemicellulose and excrement at high temperature, so as to improve the adsorption capacity of the biochar.
In some embodiments of the invention, the fecal-based biochar is fed to the adsorption device for adsorption of the yellow water and separated water. The brown water passes through a solid-liquid separation device, solid enters a high-temperature furnace (the temperature rising parameter is 20 ℃/min, the pyrolysis temperature is 250-650, the pyrolysis time is 30-60 min, and can be adjusted), carbonization is carried out to prepare biochar, and the biochar is added into an adsorption pretreatment device for utilization.
In some embodiments of the invention, the manure-based biochar is used to produce an ecological fertilizer.
In some embodiments of the invention, the manure-based biochar in the adsorption device is used for preparing ecological fertilizer after being adsorbed.
In some embodiments of the invention, the reuse water is stored in a tank for flushing a toilet.
The device realizes water circulation of the integrated system and N, P resource utilization, and partial energy of membrane distillation is supplied by solar energy. The adsorption removal rate and membrane distillation removal rate results are shown in table 1:
TABLE 1
Mixed water Adsorption removal Rate (%) Film distillation removal rate (%)
TN 15.22 96
TP 18.9 99
NH 4 + -N 38.6 87-90
PO 4 3- -P 8.15 99
Some specific examples are given below:
the black water is separated into yellow water and brown water through the source separation toilet, the yellow water enters the regulating tank, and the brown water is separated into solid and separated water through the solid-liquid separation device. And (3) the separated water enters an adjusting tank, the solid enters a drying pyrolysis device to be dried at the temperature of 150 ℃, and the solid is pyrolyzed for 1 hour at the temperature of 250-600 ℃ to obtain the manure-based biochar. The excrement-based biochar enters an adsorption device, N and P elements in the yellow water are adsorbed by stirring at 50r/min, and the adsorbed solid is taken out for a certain time. The mixed water after adsorption enters a membrane distillation device, and the mixed water is purified in a vacuum state at the temperature of about 80 ℃ so as to obtain clean water. As is clear from Table 2, the treatment results are shown in Table 2, and it is understood from Table 2 that the apparatus and the method of the present invention can achieve the treatment of toilet water up to the standard.
Figure BDA0003826828350000051
Figure BDA0003826828350000061
It should be noted that the above embodiments can be freely combined as necessary. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. The in-situ black water recycling equipment is characterized by comprising:
the source separation toilet is used for separating the source to obtain brown water and yellow water;
the solid-liquid separation device is communicated with the brown water outlet of the source separation urinal and is used for carrying out solid-liquid separation on the brown water to obtain separated water and solids;
the drying and pyrolysis device is communicated with a solid outlet of the solid-liquid separation device and is used for drying and pyrolyzing the solid to obtain the manure-based biochar;
the regulating tank is communicated with the yellow water outlet of the source separation urinal and is used for regulating the water quantity and the water quality of the separated water and the yellow water to obtain mixed water;
the carbon storage device is communicated with the drying pyrolysis device and is used for storing the manure-based biochar;
the adsorption device is respectively communicated with the regulating tank and the carbon storage device and is used for adsorbing the mixed water through the manure-based biochar to obtain semi-treated water;
the middle water tank is respectively communicated with the adsorption device and the heater and is used for storing the semi-processed water;
the membrane distillation device comprises a heater, a series membrane module, a heat exchanger and a heat exchanger water injection tank, is communicated with the adsorption device and is used for distilling the semi-treated water to obtain recycled water;
and the water storage tank is communicated with the membrane distillation device and is used for storing the reuse water.
2. A method for recycling excrement and urine is characterized by comprising the following steps:
performing source separation on black water to obtain brown water and yellow water, performing solid-liquid separation on the brown water to obtain separated water and solid, mixing the separated water and the yellow water, adjusting the water quantity and the water quality to obtain mixed water, and drying and pyrolyzing the solid to obtain the manure-based biochar; and feeding the mixed water into an adsorption device for adsorption to obtain semi-treated water, and filtering the semi-treated water through membrane distillation to obtain recycled water.
3. A method as defined in claim 2, wherein the step of recycling the feces and urine,
the obtained solid is dried and pyrolyzed to obtain the manure-based biochar, and the manure-based biochar is obtained by mixing the solid with cellulose or hemicellulose, drying and pyrolyzing the mixture.
4. A method as claimed in claim 2, wherein the fecal biochar is fed into the adsorption device for adsorption of the yellow water and the separated water.
5. A method as claimed in claim 2, wherein the manure-based biochar is used to produce ecological fertilizer.
6. A method as defined in claim 2, wherein the organic carbon is used for preparing ecological fertilizer after adsorbing the organic carbon.
7. A method as claimed in claim 2, wherein the reuse water is stored in a tank for flushing toilets.
CN202211062408.2A 2022-09-01 2022-09-01 Black water in-situ recycling method and equipment Pending CN115417548A (en)

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