CN113651492A - In-situ recycling treatment device and method for black water in rural household toilet - Google Patents
In-situ recycling treatment device and method for black water in rural household toilet Download PDFInfo
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- 238000011065 in-situ storage Methods 0.000 title claims abstract description 28
- 238000004064 recycling Methods 0.000 title claims abstract description 22
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 13
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- 238000002360 preparation method Methods 0.000 claims description 12
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- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 10
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- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 5
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 claims description 5
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/005—Black water originating from toilets
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/005—Combined electrochemical biological processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
- C02F3/342—Biological treatment of water, waste water, or sewage characterised by the microorganisms used characterised by the enzymes used
Abstract
The invention provides an in-situ recycling treatment device and method for black water in rural household toilets, wherein the device is composed of three-stage units, namely a pretreatment adjusting area, a microbial electrolysis strengthening treatment area and a clarification area, black water generated by flushing a toilet with water of each household enters a pretreatment tank to convert macromolecular organic matters into micromolecular organic matters through hydrolysis and acidification, then enters a microbial electrolysis system provided with conductive plastic particles and carbon fiber electrodes, weak voltage is applied to stimulate the microbial action, pollutants and pathogenic microorganisms in the black water are strengthened, the sewage finally flows into the clarification area, is deflected through a baffle and then flows out, the clarification area serves as an effluent storage tank, and the treated effluent can serve as farmland liquid fertilizer. The method has the advantages of simple and convenient operation, high efficiency, low consumption, simple and convenient operation, stable system operation, capability of recycling and harmlessly treating the black water and the like, and is suitable for treating the black water in the household toilets with small water amount.
Description
Technical Field
The invention belongs to the technical field of water treatment, and relates to a recycling treatment system for treating rural household toilet black water in situ by taking a microorganism electrolysis strengthening treatment unit as a core, which is particularly suitable for dispersed areas which are difficult to intensively treat in rural areas, and realizes independent treatment and black water recycling of each household.
Background
With the progress of rural human living environment improvement and 'toilet revolution', toilets in partial rural areas are changed into clean and sanitary water-flushing toilets, however, unlike urban complete sewer water-flushing toilets, drainage pipe networks in some rural areas are incomplete, and are limited by geographical conditions and economic factors, sewage treatment plants are not used for centralized collection and treatment, while black water contains a large amount of toilet flushing water, carbon, nitrogen and phosphorus resources and pathogenic microorganisms, once the black water is discharged in the environment without treatment, the pollution source is enlarged, and simultaneously, a large amount of energy substances cannot be recovered due to resource waste. Therefore, the in-situ treatment technology is adopted for the toilets in the rural decentralized region, so that the wastewater pollution is prevented, the transportation treatment cost is reduced, and the resource utilization is carried out.
At present, the water-flushing toilet in-situ treatment technology in China includes anaerobic fermentation to generate biogas for energy supply, artificial wetland treatment technology and the like, but because the water yield generated by each household is small and organic matters are few, the generated biogas cannot be continuously supplied with energy, and because certain suspended solids are contained, the problems of easy blockage, low treatment efficiency and the like exist in the artificial wetland technology. Therefore, an in-situ resource treatment technology suitable for the water quality characteristics of the household toilet is urgently needed to efficiently remove black water pollutants and pathogenic microorganisms, and the effluent is used as an available resource. The microbial electrolysis technology is a process of oxidizing organic matters at an anode and reducing organic matters at a cathode under the synergistic action of electrochemically active microbes and other microbes under the condition of applying weak voltage, and can effectively treat high-organic-matter-concentration wastewater. Compared with the traditional biological treatment technology, the weak point stimulation characteristic of the microbial electrolysis technology can also accelerate the conversion of the microorganisms to pollutants, and the complex bioelectrochemical process participated by different functional floras can fully realize the recycling of elements such as carbon, nitrogen, phosphorus and the like in the black water. Compared with the ecological treatment technology, the land area and the operation difficulty are reduced, and the integrated device is more convenient to implement. Compared with the existing rural sewage treatment equipment, the invention has low investment and operation cost, adopts the cheap carbon-based electrode material and the conductive plastic-carbon black filled conductive particles, and has stable chemical property and conductive performance. The technology has good black water treatment effect, can strengthen the removal of pathogenic microorganisms, and the treated sewage conforms to the agricultural irrigation water quality standard GB5084, so that the problem that the rural sewage is difficult to treat and recycle from the source when the black water is used as a nuclear system to treat rural household toilet black water in situ.
Disclosure of Invention
Aiming at the defects, the invention provides the device and the method for treating black water in situ in rural household toilets, which are simple and convenient to operate, have high efficiency and low consumption, are simple and convenient to operate, have stable system operation and can treat the black water in a recycling and harmless manner.
The invention provides the following technical scheme: the utility model provides a rural family lavatory black water normal position resourceful treatment device, includes preliminary treatment regulatory region, microorganism electrolysis strengthening treatment district and tertiary treatment clarification district, preliminary treatment regulatory region upper portion is provided with first gas vent, microorganism electrolysis strengthening treatment district upper portion is provided with the second gas vent, microorganism electrolysis strengthening treatment district is provided with anode region, negative pole district, external DC power supply and resistance, the anode region intussuseption is filled with carbon black conductive plastic granule, and the centre inserts the carbon rod as anode electrode, be provided with the carbon fiber brush of twining on the titanium silk as cathode electrode in the negative pole district, anode electrode with cathode electrode both ends connecting wire forms closed circuit.
Further, a stirring device is arranged in the pretreatment adjusting area.
Further, a baffle is vertically arranged in the third-stage treatment clarification area.
Further, the particle size of the carbon black conductive plastic particles is 2cm-3 cm.
Further, the working voltage of the external direct current power supply is 0.8V.
Further, the raw materials for preparing the carbon black conductive plastic particles comprise the following components in parts by weight:
further, the particle size of the nano iron oxide particles is 10 nm-30 nm; the nanometer isThe iron oxide is alpha-Fe2O3、β-Fe2O3、γ-Fe2O3、Fe3O4Or FeO.
Further, the preparation method of the carbon black conductive plastic particles comprises the following steps:
s1: immersing the nanometer iron oxide particles in parts by weight in a sodium hydroxide solution with the concentration of 8-10% for 1-1.5 h, then cleaning for 1-2 times by using distilled water to remove oil stains on the surface, then immersing for 60min by using dilute hydrochloric acid with the mass fraction concentration of 2% to remove oxides on the surface, cleaning for 1-2 times by using distilled water, and drying for later use;
s2: dissolving the potassium persulfate in parts by weight in 300-500 ml of distilled water, adding the activated carbon in parts by weight, the polyaniline in parts by weight and the nano iron oxide particles obtained after the treatment in the step S1 into a potassium persulfate solution, stirring at the rotating speed of 200-300 rpm at the temperature of 60-80 ℃ for 1-2 h, continuously adding the N, N' -methylene bisacrylamide in parts by weight during stirring, and then standing for 10 min;
s4: and (3) filtering the precipitate particles obtained in the step S2 by using a polyvinylidene fluoride filter membrane, cleaning for 3-5 times by using ethanol and distilled water at the bottom, and airing in a cool environment to obtain the carbon black conductive plastic particles.
The invention also provides an in-situ recycling treatment method for the black water in the rural household toilet by adopting the device, which comprises the following steps:
1) firstly, introducing black water in a rural household toilet into the pretreatment regulation area, slowly stirring the black water under the action of the stirring device for hydrolysis and acidification, hydrolyzing and fermenting complex organic matters under the action of microbial exoenzyme, breaking chains of macromolecular substances into micromolecule dissolved organic matters, then sequentially entering an anaerobic fermentation hydrogen-producing, acetic acid-producing and methane-producing stage, and discharging a small amount of methane, hydrogen and carbon dioxide gas from the first discharge port; the complex organic matters are feces and the like;
2) the black water treated in the pretreatment adjusting area enters the microorganism electrolysis strengthening treatment area, and the method comprises the following steps ofThe organic matters are decomposed and removed by the electrochemical active microorganisms and other microorganisms generated by long-term operation of the anode, on one hand, the microbial flora enriched in biomembranes can grow on the surface of the carbon black conductive plastic particles in the anode area to strengthen the treatment of pollutants, and on the other hand, electrons and H are generated when the microbial flora containing the electrochemical active bacteria degrade the organic matters+、CO2、CH4In the process of electrochemically active microorganism metabolism, electrons are transferred from the inside of cells to an anode carbon rod electrode outside the cells, then reach a cathode under the action of potential difference provided by a power supply through an external direct-current power supply, and the electrons and protons are combined at the cathode to generate hydrogen;
3) and the black water treated by the microorganism electrolysis strengthening treatment area is discharged out of the device through the three-stage treatment clarification area, so that the in-situ resource treatment of the black water is completed.
The invention has the beneficial effects that:
1. the rural household toilet black water in-situ recycling treatment device and method provided by the invention are simple and convenient to operate, have the advantages of high efficiency, low consumption, simple and convenient operation, stable system operation, capability of recycling and harmlessly treating black water and the like, and are suitable for treating the black water of the household toilet with small water amount.
2. The invention provides an in-situ recycling treatment device and method for rural household toilet black water, wherein the black water generated by flushing a toilet with water of each household enters a pretreatment tank firstly, macromolecular organic matters are converted into micromolecular organic matters through hydrolysis acidification, then the micromolecular organic matters enter a microbial electrolysis system provided with conductive plastic particles and carbon fiber electrodes, weak voltage is applied to stimulate the microbial action, pollutants and pathogenic microorganisms in the black water are treated in a strengthening mode, the sewage finally flows into a clarification area, is deflected by a baffle and then flows out, the clarification area serves as an effluent storage tank, and the treated effluent can serve as farmland liquid fertilizer.
3. The invention provides an in-situ recycling treatment device and method for rural household toilet black water, wherein black water generated by flushing a toilet with water of each household is subjected to self-preparation to obtain carbon black conductive carbon black by modifying nano iron oxide particles, activated carbon and conductive high polymer polyaniline through arranging a microbial electrolysis strengthening treatment area in the middlePlastic particles capable of undergoing redox reaction Fe-2e → Fe at the anode2+-e-→Fe3+The reductive action of Fe can open and break the ring of organic matter in the system, change its chemical and physical properties, and can utilize Fe3+With OH-The flocculated material obtained by reduction Fe (OH)3Increasing the complexation of heavy metal ions with the heavy metal ions, increasing the further removal of the heavy metal ions and the attachment of organic matters, reducing the hydrogen ions at the anode, and removing H on the surface of the anode+Obtain electrons transferred by a closed loop to generate hydrogen gas, 2H++2e-→2[H]→H2The method is beneficial to the generation of high-efficiency clean gas energy substances, thereby achieving three purposes.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
FIG. 1 is an overall schematic view of the in-situ recycling treatment device for black water in rural household toilets provided by the invention.
In the figure: 1. a pretreatment conditioning zone; 2. a stirring device; 3. a first exhaust port; 4. a microorganism electrolysis strengthening area 5 is a titanium wire; 6. a carbon fiber brush; 7. a second exhaust port; 8. the external direct current power supply; 9. a resistance; 10. a carbon rod; 11. filling conductive particles; 12. a clarification zone; 13. and a baffle plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1, the in-situ recycling device for black water in rural household toilets provided in this embodiment 1 includes a pretreatment regulation area 1, a microbial electrolysis strengthening treatment area 4 and a three-stage treatment clarification area 12, the upper portion of the pretreatment regulation area 1 is provided with a first exhaust port 3, the upper portion of the microbial electrolysis strengthening treatment area 4 is provided with a second exhaust port 7, and the device is characterized in that the microbial electrolysis strengthening treatment area 4 is provided with an anode area, a cathode area, an external direct current power supply 8 and a resistor 9, the anode area is filled with carbon black conductive plastic particles 11, a carbon rod 10 is inserted in the middle of the anode area as an anode electrode, a carbon fiber brush 6 wound on a titanium wire 5 as a cathode electrode is arranged in the cathode area, and two ends of the anode electrode and the cathode electrode are connected with a conducting wire to form a closed loop.
Example 2
On the basis of example 1, a stirring device 2 is arranged in the pretreatment adjusting area 1.
Example 3
On the basis of the embodiment 1, a baffle 13 is vertically arranged in the clarification area 12 of the third-stage treatment.
Example 4
On the basis of example 1, the particle diameter of the carbon black conductive plastic particles is 2cm-3 cm. The particle size of the carbon black conductive plastic particles can be selected according to the actual microbial electrolysis effect to be achieved.
Example 5
In example 1, the operating voltage of the applied dc power supply was 0.8V.
Example 6
This example provides a raw material for preparing carbon black conductive plastic particles in the apparatus of example 1, which comprises the following components in parts by weight:
the particle size of the nano iron oxide particles is 10 nm; the nano iron oxide is alpha-Fe2O3
The preparation method of the carbon black conductive plastic particles comprises the following steps:
s1: immersing 25 parts of nano iron oxide particles in 8% sodium hydroxide solution for 1 hour, then cleaning for 2 times by using distilled water to remove oil stains on the surface, then soaking for 60min by using 2% dilute hydrochloric acid to remove oxides on the surface, cleaning for 2 times by using distilled water, and drying for later use;
s2: dissolving 3 parts of potassium persulfate in 300ml of distilled water, adding 50 parts of activated carbon, 20 parts of polyaniline and the nano iron oxide particles obtained after the treatment in the step S1 into a potassium persulfate solution, stirring at the rotating speed of 200rpm at the temperature of 60 ℃ for 1h, continuously adding 2 parts of N, N' -methylene bisacrylamide during stirring, and then standing for 10 min;
s4: and (4) filtering the precipitate particles obtained in the step (S2) by using a polyvinylidene fluoride filter membrane, cleaning for 3 times by using ethanol and distilled water at the bottom, and airing in a cool environment to obtain the carbon black conductive plastic particles.
Example 7
The preparation raw material of the carbon black conductive plastic particles provided by the embodiment is different from the preparation raw material of the carbon black conductive plastic particles in the embodiment 6, and comprises the following components in parts by weight:
the particle size of the nano iron oxide particles is 20 nm; the nano iron oxide is gamma-Fe2O3Any one of the above.
The preparation method of the carbon black conductive plastic particles comprises the following steps:
s1: 30 parts of nano iron oxide particles gamma-Fe2O3Immersing in 9% sodium hydroxide solution for 1.25h, cleaning with distilled water for 1 time to remove oil stain on the surface, soaking with 2% dilute hydrochloric acid for 60min to remove oxide on the surface, cleaning with distilled water for 1 time, and oven drying;
s2: dissolving 4 parts of potassium persulfate in 400ml of distilled water, adding 55 parts of activated carbon, 30 parts of polyaniline and the nano iron oxide particles obtained after the treatment in the step S1 into a potassium persulfate solution, stirring at the temperature of 70 ℃ and the rotating speed of 250rpm for 1.5h, continuously adding 2.5 parts of N, N' -methylene bisacrylamide during stirring, and then standing for 10 min;
s4: and (4) filtering the precipitate particles obtained in the step S2 by using a polyvinylidene fluoride filter membrane, cleaning for 4 times by using ethanol and distilled water at the bottom, and airing in a cool environment to obtain the carbon black conductive plastic particles.
Example 8
The preparation raw material of the carbon black conductive plastic particle provided by the embodiment is different from the preparation raw material of the embodiment 6 in that the preparation raw material comprises the following components in parts by weight:
the particle size of the nano iron oxide particles is 30 nm; the nano iron oxide is Fe3O4。
The preparation method of the carbon black conductive plastic particles comprises the following steps:
s1: 35 parts of nano iron oxide particles Fe3O4Immersing in 10% sodium hydroxide solution for 1.5h, cleaning with distilled water for 2 times to remove oil stains on the surface, soaking with 2% dilute hydrochloric acid for 60min to remove oxides on the surface, cleaning with distilled water for 2 times, and oven drying;
s2: dissolving 5 parts of potassium persulfate in 500ml of distilled water, adding 60 parts of activated carbon, 40 parts of polyaniline and the nano iron oxide particles obtained after the treatment in the step S1 into a potassium persulfate solution, stirring at the temperature of 80 ℃ at the rotating speed of 300rpm for 2 hours, continuously adding 3 parts of N, N' -methylene bisacrylamide during stirring, and then standing for 10 min;
s4: and (4) filtering the precipitate particles obtained in the step (S2) by using a polyvinylidene fluoride filter membrane, then cleaning for 5 times by using ethanol and distilled water at the bottom, and airing in a cool environment to obtain the carbon black conductive plastic particles.
Example 9
The embodiment provides an in-situ recycling treatment method for black water in rural household toilets, which comprises the following steps:
1) firstly, introducing black water in a rural household toilet into a pretreatment adjusting area 1, slowly stirring the black water under the action of a stirring device 2 for hydrolysis and acidification, hydrolyzing and fermenting complex organic matters such as excrement and the like under the action of microbial exoenzyme, breaking chains of macromolecular substances into micromolecule dissolved organic matters, then sequentially performing anaerobic fermentation to produce hydrogen, acetic acid and methane, and generating a small amount of methane, hydrogen and carbon dioxide gas and discharging the methane, hydrogen and carbon dioxide gas from a first discharge port 3;
2) the black water treated by the pretreatment regulating area 1 enters a microorganism electrolysis strengthening treatment area 4, the organic matters are decomposed and removed by the electrochemical active microorganisms and other microorganisms generated by long-term operation of the anode, on one hand, the microorganism flora rich in biomembrane enrichment is grown on the surface of the carbon black conductive plastic particles 11 in the anode area to strengthen the treatment of pollutants, and on the other hand, the microorganism flora containing the electrochemical active bacteria generates electrons and H when degrading the organic matters+、CO2、CH4In the process of metabolism of electrochemically active microorganisms, electrons are transferred from the inside of cells to an anode carbon rod electrode outside the cells, then the electrons reach a cathode under the action of potential difference provided by an external direct-current power supply (8) and are combined with protons at the cathode to generate hydrogen, the reaction system can rapidly degrade dominant strains of the black water under weak electric stimulation, pollutants and pathogenic microorganisms are sufficiently enhanced, and the recycling and harmless utilization of the black water are realized;
3) the black water treated by the microorganism electrolysis strengthening treatment area 4 passes through a discharge device of a three-stage treatment clarification area 12 to complete the in-situ resource treatment of the black water.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (9)
1. An in-situ recycling treatment device for black water in rural household toilets comprises a pretreatment adjusting area (1), a microorganism electrolysis strengthening treatment area (4) and a three-stage treatment clarification area (12), a first exhaust port (3) is arranged at the upper part of the pretreatment adjusting area (1), a second exhaust port (7) is arranged at the upper part of the microorganism electrolysis strengthening treatment area (4), it is characterized in that the microorganism electrolysis strengthening treatment area (4) is provided with an anode area, a cathode area, an external direct current power supply (8) and a resistor (9), the anode area is filled with carbon black conductive plastic particles (11), a carbon rod (10) is inserted in the middle to be used as an anode electrode, and a carbon fiber brush (6) which is used as a cathode electrode and is wound on the titanium wire (5) is arranged in the cathode area, and the two ends of the anode electrode and the two ends of the cathode electrode are connected with leads to form a closed loop.
2. The in-situ recycling treatment device for the black water in rural household toilets according to claim 1, wherein a stirring device (2) is arranged in the pretreatment adjusting area (1).
3. The in-situ recycling treatment device for the black water in rural household toilets according to claim 1, wherein a baffle (13) is vertically arranged in the third-stage treatment clarification zone (12).
4. The in-situ resource treatment device for the black water in rural household toilets according to claim 1, wherein the particle size of the carbon black conductive plastic particles is 2cm-3 cm.
5. The in-situ resource treatment device for the black water in rural household toilets according to claim 1, wherein the working voltage of the external direct current power supply is 0.8V.
6. The in-situ recycling treatment device for black water in rural household toilets according to claim 1, wherein the preparation raw material of the carbon black conductive plastic particles comprises the following components in parts by weight:
7. the in-situ recycling treatment device for the black water in rural household toilets according to claim 6, wherein the particle size of the nano iron oxide particles is 10 nm-30 nm; the nano iron oxide is alpha-Fe2O3、β-Fe2O3、γ-Fe2O3、Fe3O4Or FeO.
8. The in-situ resource treatment device for the black water in rural household toilets according to claim 6, wherein the preparation method for the carbon black conductive plastic particles comprises the following steps:
s1: immersing the nanometer iron oxide particles in parts by weight in a sodium hydroxide solution with the concentration of 8-10% for 1-1.5 h, then cleaning for 1-2 times by using distilled water to remove oil stains on the surface, then immersing for 60min by using dilute hydrochloric acid with the mass fraction concentration of 2% to remove oxides on the surface, cleaning for 1-2 times by using distilled water, and drying for later use;
s2: dissolving the potassium persulfate in parts by weight in 300-500 ml of distilled water, adding the activated carbon in parts by weight, the polyaniline in parts by weight and the nano iron oxide particles obtained after the treatment in the step S1 into a potassium persulfate solution, stirring at the rotating speed of 200-300 rpm at the temperature of 60-80 ℃ for 1-2 h, continuously adding the N, N' -methylene bisacrylamide in parts by weight during stirring, and then standing for 10 min;
s4: and (3) filtering the precipitate particles obtained in the step S2 by using a polyvinylidene fluoride filter membrane, cleaning for 3-5 times by using ethanol and distilled water at the bottom, and airing in a cool environment to obtain the carbon black conductive plastic particles.
9. The in-situ resource treatment method for the black water in the rural household toilet according to any one of the devices of claims 1 to 8, which is characterized by comprising the following steps:
1) firstly, introducing black water in a rural household toilet into the pretreatment adjusting area (1), slowly stirring under the action of the stirring device (2) for hydrolysis and acidification, hydrolyzing and fermenting complex organic matters under the action of microbial exoenzyme, breaking chains of macromolecular substances into micromolecule dissolved organic matters, then sequentially entering an anaerobic fermentation hydrogen-producing and acetic acid-producing stage and a methane-producing stage, and producing a small amount of methane, hydrogen and carbon dioxide gas and discharging the methane, hydrogen and carbon dioxide gas from the first discharge port (3);
2) the black water treated by the pretreatment regulating area (1) enters the microorganism electrolysis strengthening treatment area (4), the organic matters are decomposed and removed by utilizing electrochemically active microorganisms and other microorganisms generated by long-term operation of the anode, on one hand, microorganism flora rich in biomembrane enrichment can grow on the surface of the carbon black conductive plastic particles (11) in the anode area to strengthen treatment pollutants, and on the other hand, electrons and H are generated when the microorganism flora containing the electrochemically active bacteria degrade the organic matters+、CO2、CH4In the process of metabolism of the electrochemical active microorganisms, electrons are transferred from the inside of cells to an anode carbon rod electrode outside the cells, then the electrons reach a cathode under the action of potential difference provided by an external direct current power supply (8) and are combined with protons at the cathode to generate hydrogen;
3) the black water treated by the microorganism electrolysis strengthening treatment area (4) is discharged out of the device through the three-stage treatment clarification area (12), and the in-situ resource treatment of the black water is completed.
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