CN113461259B - Treatment system for rural decentralized domestic garbage and sewage - Google Patents
Treatment system for rural decentralized domestic garbage and sewage Download PDFInfo
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- CN113461259B CN113461259B CN202110746517.5A CN202110746517A CN113461259B CN 113461259 B CN113461259 B CN 113461259B CN 202110746517 A CN202110746517 A CN 202110746517A CN 113461259 B CN113461259 B CN 113461259B
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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
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
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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
- 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
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Abstract
The invention relates to a treatment system for rural decentralized domestic waste and sewage, which comprises waste biogas devices, sewage treatment devices and reuse water storage tanks which are decentralized in residences of various peasant households, and also comprises irrigation pipelines which connect each reuse water storage tank with a farmland irrigation main canal; the biogas pipeline of the garbage biogas device is connected with a heat supply boiler and a gas stove in parallel, the hot water pipeline of the heat supply boiler is connected with a heating device and a heat exchanger, and the heat exchanger is connected with a sewage treatment device and is used for ensuring the biochemical treatment temperature of the sewage treatment device; the biogas slurry pipeline of the garbage biogas device is connected with the sewage treatment device and is used for supplementing a carbon source required by biochemical treatment of the sewage treatment device; the sewage treatment device is connected with the reuse water storage tank and is used for temporarily storing the reuse water reaching the standard after treatment.
Description
Technical Field
The invention belongs to the technical field of rural environment treatment and resource utilization, and particularly relates to a treatment system for rural decentralized domestic garbage and sewage.
Background
With the continuous deepening of the construction of new rural areas, the living standard of people in rural areas is generally improved. The important content of rural ecological environment construction is the high-efficiency treatment of rural domestic garbage and sewage. Compared with municipal domestic waste and sewage, the type of rural domestic waste and the type of pollutant composition of sewage are simpler, the treatment is easy to realize, and a lot of nutrient substances in the waste and the sewage generated in rural daily life can be recycled by people. However, the treatment of the domestic garbage and the sewage in rural areas at present also has some problems, for example, due to dispersed living, the generation sites of the domestic garbage and the sewage are relatively dispersed, the transportation and the centralized treatment of the domestic garbage are easy to realize compared with the sewage, but the construction of a conventional sewage treatment plant needs to arrange pipelines for drainage, and the treated reclaimed water needs to be transported to farmlands with wide areas for irrigation by more pipelines, so that the construction cost is higher;
disclosure of Invention
Aiming at the problems, the invention provides a treatment system for rural decentralized domestic waste and sewage, which comprises waste methane devices, sewage treatment devices and reuse water storage tanks which are decentralized in residences of various peasant households, and also comprises irrigation pipelines for connecting each reuse water storage tank with a farmland irrigation main canal;
the biogas pipeline of the garbage biogas device is connected with a heat supply boiler and a gas stove in parallel, the hot water pipeline of the heat supply boiler is connected with a heating device and a heat exchanger, and the heat exchanger is connected with a sewage treatment device and is used for ensuring the biochemical treatment temperature of the sewage treatment device;
the biogas slurry pipeline of the garbage biogas device is connected with the sewage treatment device and is used for supplementing a carbon source required by biochemical treatment of the sewage treatment device; the sewage treatment device is connected with the reuse water storage tank and is used for temporarily storing the reuse water reaching the standard after treatment.
The treatment system for rural dispersive domestic garbage and sewage takes a garbage biogas device and a sewage treatment device as core parts, the garbage biogas device is used for treating domestic garbage to generate biogas and biogas slurry, the biogas can be directly used for a gas stove as a heat source for daily cooking and can be combusted as a heat source of a heat supply boiler, hot water generated by the heat supply boiler can be used for heating equipment and can be used as a heat source of a heat exchanger, heat energy is provided for the sewage treatment device in a season with lower temperature, the biochemical treatment of the sewage treatment device is ensured to be at proper temperature, and the biochemical treatment efficiency is improved; the biogas slurry contains abundant organic substances, and is introduced into the sewage treatment device to supplement a carbon source for biochemical treatment, so that the aim of improving the biochemical treatment efficiency can be fulfilled. The water body treated by the sewage treatment device can be used for daily domestic water after reaching the reclaimed water reuse standard, and can also be stored for irrigating farmlands or green plants. The treatment system for rural decentralized domestic waste and sewage provided by the invention utilizes the treatment devices for daily domestic waste and sewage in a synergistic manner, utilizes the biogas generated by waste treatment as a heat source for sewage treatment, utilizes biogas slurry as a carbon source for sewage treatment, and uses local materials; furthermore, the sewage treatment device is configured by utilizing the original garbage methane device of rural families, so that the construction cost can be greatly saved, and the resource utilization efficiency can be improved.
Optionally, the sewage treatment device comprises a pretreatment area and a microorganism treatment area from bottom to top, and the pretreatment area and the microorganism treatment area are both located in the spindle-shaped shell;
a water inlet pipe is arranged at the bottom of the pretreatment area, and a filtering device is arranged in the pretreatment area;
an air outlet device is arranged at the lower part of the microorganism processing area and is connected with an air inlet on the spindle-shaped shell through an air conveying pipe, a microorganism carrier is arranged in the microorganism processing area, and the water outlet pipe is arranged at the top of the microorganism processing area.
Optionally, the spindle-shaped shell is internally provided with an inner cavity and an outer cavity, the inner cavity is a pretreatment area and a microorganism treatment area, the outer cavity is a circuit channel and a heat preservation layer and is used for accommodating circuits, gas circuits and heat preservation hot water, and the outer wall of the outer cavity is provided with a water inlet and a water outlet.
Optionally, the pretreatment region is a vertically arranged cylindrical cavity, the cylindrical cavity enters from the bottom of the spindle-shaped shell, penetrates through the outer-layer cavity of the spindle-shaped shell and extends into the inner-layer cavity, namely, the pretreatment region is arranged at the lower part of the spindle-shaped shell; the bottom of the cylindrical cavity is provided with a water inlet pipe, and a filtering device is arranged inside the cylindrical cavity.
Optionally, the filtering device comprises a first filtering layer and a second filtering layer from top to bottom, and the first filtering layer and the second filtering layer are perpendicular to the water flow direction of the pretreatment area and used for adsorbing pollutants and small suspended particles in sewage.
Optionally, an air outlet device is arranged at the top of the cylindrical cavity of the pretreatment area, namely the air outlet device is arranged at the lower part of the microbial treatment area, a microbial carrier is arranged above the air outlet device, and the top of the microbial carrier is fixedly connected with the filter column.
Optionally, the air outlet device includes a plurality of blowing nozzles, a plurality of check valves and an air outlet pipe, and each blowing nozzle is connected to the air outlet pipe through one check valve.
Further optionally, the air outlet pipe is connected with an air inlet on the spindle-shaped shell through an air delivery pipe, and the air delivery pipe is located in the outer layer cavity of the spindle-shaped shell and penetrates through the wall surface to enter the inner layer cavity so as to be connected with the air outlet pipe.
Optionally, the microorganism carrier is divided into a plurality of vertically arranged carrier strings, and each carrier string is uniformly provided with a plurality of carrier monomers for providing attachment sites for the bacteria.
Optionally, a biogas slurry pipeline is arranged at the lower part of the garbage biogas device and is sequentially connected with the intermediate processor and a water inlet pipe of the sewage treatment device; the upper part of the garbage biogas device is provided with a biogas pipeline which is connected with the intermediate processor first and then connected with the heat supply boiler and the gas stove in parallel by the intermediate processor.
The intermediate processor comprises a tank body, a first stirrer and a first sludge discharge port, the first stirrer is arranged in the tank body, the first sludge discharge port is arranged at the bottom of the tank body, quick lime is placed in the tank body, a biogas slurry pipeline is connected with the lower part of the tank body and is used for introducing biogas slurry into the tank body, the biogas pipeline is connected with the bottom of the tank body and is used for introducing biogas into the biogas slurry in the tank body, the biogas pipeline is arranged at the top of the tank body at the outlet of the intermediate processor, and the filtered biogas is introduced into a subsequent heat supply boiler and a subsequent gas stove.
One end of a first channel of the heat exchanger is connected with a hot water pipeline of the heat supply boiler, the other end of the first channel of the heat exchanger is connected with heating equipment, one end of a second channel of the heat exchanger is connected with a reuse water storage tank, and the other end of the second channel of the heat exchanger is connected with a water inlet of an outer cavity of the fusiform shell.
Drawings
Fig. 1 is a structural diagram of the treatment system for rural decentralized domestic waste and sewage.
FIG. 2 is a schematic structural view of the sewage treatment apparatus.
Fig. 3 is a schematic structural view of the air outlet device.
In the attached drawings, 1-a garbage biogas device, 101-a biogas pipeline, 102-a biogas slurry pipeline, 2-a sewage treatment device, 201-a pretreatment area, 202-a microorganism treatment area, 203-a spindle-shaped shell, 204-an inner layer cavity, 205-an outer layer cavity, 3-a reuse water storage tank, 4-a farmland irrigation main canal, 5-a heat supply boiler, 501-a hot water pipeline, 6-a gas stove, 7-heating equipment, 8-a heat exchanger, 9-a water inlet pipe, 10-a first bracket, 11-a water inlet valve, 12-an air outlet device, 1201-a blowing nozzle, 1202-a one-way valve, 1203-an air outlet pipe, 13-microorganism carriers, 14-a filter column, 15-an air delivery pipe, 16-a gas booster pump and 17-an external spraying device, 18-a water outlet pipe, 19-a pollutant detector, 20-an instrument box, 21-a solar panel, 22-an intermediate processor and 23-a sewage storage tank.
Detailed Description
The treatment system for rural decentralized domestic waste and sewage according to this embodiment, as shown in fig. 1-3, includes a waste biogas device 1, a sewage treatment device 2, and reuse water storage tanks 3, which are decentralized in each farmer residence, and further includes irrigation pipes connecting each reuse water storage tank 3 with a farm irrigation main canal 4;
the biogas pipeline 101 of the garbage biogas device 1 is connected in parallel with a heat supply boiler 5 and a gas stove 6, a hot water pipeline 501 of the heat supply boiler 5 is connected with a heating device 7 and a heat exchanger 8, and the heat exchanger 8 is connected with the sewage treatment device 2 and is used for ensuring the biochemical treatment temperature of the sewage treatment device 2;
the biogas slurry pipeline 102 of the garbage biogas device 1 is connected with the sewage treatment device 2 and is used for supplementing carbon sources required by biochemical treatment of the sewage treatment device 2; the sewage treatment device 2 is connected with a reuse water storage tank 3 and is used for temporarily storing the reuse water reaching the standard after treatment.
Optionally, the sewage treatment device 2 comprises a pretreatment area 201 and a microorganism treatment area 202 from bottom to top, and the pretreatment area 201 and the microorganism treatment area 202 are both located inside a spindle-shaped shell 203;
the bottom of the pretreatment area 201 is provided with a water inlet pipe 9, and a filtering device is arranged inside the pretreatment area;
an air outlet device 16 is arranged at the lower part of the microorganism processing area and is connected with an air inlet 11 on the spindle-shaped shell through an air conveying pipe 13, a microorganism carrier 15 is arranged inside the microorganism processing area, and the water outlet pipe 9 is arranged at the top of the microorganism processing area.
Optionally, the spindle-shaped shell 203 has an inner cavity and an outer cavity inside, the inner cavity 204 is a pretreatment area and a microorganism treatment area, the outer cavity 205 is a circuit channel and a heat insulation layer for accommodating circuits, gas circuits and heat insulation hot water, and the outer wall of the outer cavity 205 is provided with a water inlet and a water outlet.
Optionally, a first support 10 is disposed at an outer side of a bottom of the spindle-shaped housing 203, and is used for supporting the spindle-shaped housing 203.
Optionally, the pretreatment region 201 is a vertically disposed cylindrical cavity, the cylindrical cavity enters from the bottom of the spindle-shaped shell 203, penetrates through the outer-layer cavity 205 of the spindle-shaped shell, and extends into the inner-layer cavity 204, that is, the pretreatment region 201 is disposed at the lower portion of the spindle-shaped shell 203; the bottom of the cylindrical cavity is provided with a water inlet pipe 9, the interior of the cylindrical cavity is provided with a filtering device, and the water inlet pipe 9 is provided with a water inlet valve 11 for controlling the water inlet of the pretreatment area 201 in real time.
Optionally, filter equipment is equipped with first filter layer and second filter layer from top to bottom, and the filtering material of first filter layer is green zeolite and biochar for adsorb the pollutant in the sewage, and the filtering material of second filter layer is fibre ball and polypropylene wool for adsorb pollutant and the tiny particle suspended solid in the sewage.
Optionally, a grid is arranged below the second filter layer and used for intercepting large suspended particles in the sewage.
Sewage enters the pretreatment area 201 from the water inlet pipe 9, sequentially passes through the grating, the second filter layer and the first filter layer, and gradually filters or adsorbs pollutant particles in the sewage, so that a foundation is laid for biochemical treatment of the subsequent microbial treatment area 202.
Optionally, an air outlet device 12 is disposed at the top of the cylindrical cavity of the pretreatment region 201, that is, the air outlet device 12 is disposed at the lower portion of the microbial treatment region 202, a microbial carrier 13 is disposed above the air outlet device 12, and the top of the microbial carrier 13 is fixedly connected to the filter column 14.
Optionally, the air outlet device 12 includes a plurality of blowing nozzles 1201, a plurality of check valves 1202, and an air outlet pipe 1203, each blowing nozzle 1201 is connected to the air outlet pipe 1203 through one check valve 1202, the air supplied into the air outlet pipe 1203 enters the microorganism treatment area 202 through the blowing nozzle 1201 and provides oxygen or inert gas, and the check valve 1202 is configured to prevent the sewage from flowing back into the air outlet pipe 1203.
Further optionally, the air outlet pipe 1203 is connected to an air inlet on the spindle-shaped housing 203 through an air delivery pipe 15, and the air delivery pipe 15 is located in the outer layer cavity 205 of the spindle-shaped housing and penetrates through the wall surface to enter the inner layer cavity 204, so as to be connected to the air outlet pipe 1203.
Further optionally, a gas booster pump 16 is disposed on the air delivery pipe 15, and is used for increasing the pressure of the air entering from the air inlet, so that the air is smoothly ejected from the air blowing nozzle 1201.
Optionally, the microorganism carrier 13 is divided into a plurality of vertically arranged carrier strings, each carrier string is uniformly provided with a plurality of carrier monomers, and the shape of each carrier monomer is selected from a circle, a triangle, a square, a fork and a star, and is used for providing attachment sites for the bacteria.
Optionally, the filter column 14 is disposed at the upper part of the microorganism treating area 202, and an adsorbing material, such as green zeolite and biochar, is disposed in the filter column 14 for finally adsorbing the purified wastewater.
The sewage filtered and purified by the pretreatment area 201 enters the microbial treatment area 202 and is fully contacted with the microbial carriers 13, the air outlet device 12 provides oxygen or inert gas for the microbial treatment area 202, and simultaneously disturbs the sewage to promote the contact of the sewage and the microbial carriers 13; the biochemically treated sewage flows upwards and passes through the filter column 14 to finish final adsorption and purification, and the sewage reaches the standard of reclaimed water reuse.
Optionally, the sewage treatment device 2 further comprises an external spraying device 17, and the top of the spindle-shaped housing 203 is connected to the external spraying device 17 through a water outlet pipe 18, and is used for spraying the water body reaching the standard to the outside, and irrigating green plants or crops on site. Specifically, the bottom of outlet pipe 18 communicates the top in microbiological treatment area 202 to run through outer cavity 205 of fusiform shell, and outside spray set 17 is connected on the top of outlet pipe 18, outside spray set 17 includes a plurality of shower to evenly distributed becomes the umbrella-type, the one end that outlet pipe 18 was kept away from to the shower is equipped with the mouth that sprays for outwards spray the sewage after handling, irrigates farmland or green planting.
Optionally, a plurality of spraying openings are uniformly formed in the spraying pipe, so that the spraying density is increased.
Optionally, a rotating device is arranged at the bottom of the external spraying device 17, and can drive the spraying pipe to horizontally rotate, so that the spraying area is increased.
Optionally, a pollutant detector 19 is arranged above the filter column 14, the pollutant detector 19 is in communication connection with an instrument box 20, and the instrument box 20 is arranged on the outer side surface of the spindle-shaped shell 203 or is arranged at another place convenient for observation.
As an embodiment, the contaminant detector 19 is connected to the instrument box 20 through a wire, the instrument box 20 is disposed on the outer side of the spindle-shaped housing 203, and the wire is disposed in the outer cavity 205 of the spindle-shaped housing and penetrates the inner cavity 204 to connect to the contaminant detector 19.
As another embodiment, the pollutant detector 19 is connected with the meter box 20 in a communication mode, and the meter box 20 is arranged in the kitchen of a farmer and is arranged side by side with the electric meter and the water meter, so that unified observation of personnel is facilitated.
The pollutant detector 29 is selected from an ammonia nitrogen detector, a COD detector and a total phosphorus detector, and is used for monitoring whether the water body treated by the filter column 14 meets the reuse standard in real time, if the water body meets the standard, the water body is discharged from the water outlet pipe 18, and if the water body does not meet the standard, the water body stays in the microorganism treatment area 202 and continues to be treated.
Optionally, be equipped with pollutant display and stand-by power supply in the instrument box 20, pollutant display communication connection pollutant detector 19, stand-by power supply passes through the circuit connection gaseous booster pump 16, rotating device and pollutant display.
Optionally, a solar panel 21 is arranged above the external spraying device 17, the solar panel 21 is supported by a second support, the bottom of the second support is fixedly connected to the outer surface of the spindle-shaped housing 203, and the solar panel 21 is connected to the gas booster pump 16, the rotating device and the pollutant display through a circuit to provide electric energy.
Before operation, a proper amount of sewage submerging filter columns 14 are placed, microbial liquid is inoculated for early-stage membrane hanging, at the moment, the air outlet device 12 is started to operate, and the sewage in the microbial treatment area 202 is blown with oxygen or filled with inert gas.
When in operation, rural domestic sewage enters the pretreatment area 201 from the sewage inlet pipe 9, sequentially flows through the grating, the first filter layer and the second filter layer, enters the microorganism treatment area 202, and microorganisms on the microorganism carriers 13 and in the water body have a degradation effect on the sewage; along with the water flow direction, the filter column 14 finally filters and adsorbs the pollutants in the sewage again, and finally the sewage is discharged into the reuse water storage tank 3 through the water outlet pipe 18 or is sprayed and irrigated through the external spraying device 17.
Meanwhile, the pollutant detector 19 monitors the pollutant index of the microorganism treatment area 202 in real time in the operation process, and controls the retention time of the sewage in the inner cavity 204 according to the running sewage flow rate of the monitoring data adjusting device in real time, so as to optimize the effluent quality.
The sewage treatment device 2 is provided with the spindle-shaped shell 203, the spindle-shaped shell 203 provides a larger space for the pretreatment area 201 and the microorganism reaction area 202, a relatively large amount of thalli can be stored to treat sewage, the biomass of microorganisms can be conveniently regulated, the sewage treatment efficiency is improved, the occupied area of the whole device cannot be increased, the space is saved, and the installation is convenient; the sewage treatment device 2 occupies a small area, and is convenient for distributed sewage treatment and device maintenance and management; the external spraying device 17 sprays and irrigates the treated sewage, so that the sewage treatment device integrates the functions of recovery, treatment and disposal; the sewage treatment device is provided with a solar cell panel 21 for power supply, the operation and management are simple and convenient, the pollutant detector 19 and the instrument box 20 can monitor pollutants, and the treatment effect can be mastered in real time.
The sewage treatment device 2 can be arranged on the ground or buried underground, when the sewage treatment device 2 is arranged on the ground, preferably in a sunny place, the outer side surface of the spindle-shaped shell 203 is coated with black paint, so that heat absorption is facilitated, and the temperature in the microorganism treatment area 202 is kept; preferably on green grounds, to facilitate in situ sprinkling by said external sprinkling means 17. When the sewage treatment device 2 is buried underground, only the upper half part of the water outlet pipe 18 and the external spraying device 17 are exposed out of the ground, so that spraying is convenient, and the spindle-shaped shell 203 and related pipelines are buried underground, so that the occupied area can be saved, and the underground environment has a positive effect on the constant temperature of the microorganism treatment area 202.
The waste biogas device 1 is a conventional device for producing biogas by fermenting domestic waste used in rural families, and the invention is not particularly limited.
Optionally, a biogas slurry pipeline 102 is arranged at the lower part of the garbage biogas device 1, and the biogas slurry pipeline 102 is sequentially connected with the intermediate processor 22 and the water inlet pipe 9 of the sewage treatment device 2; the upper part of the garbage biogas device 1 is provided with a biogas pipeline 101, the biogas pipeline 101 is firstly connected with the intermediate processor 22, and then the intermediate processor 22 is connected with the heat supply boiler 5 and the gas stove 6 in parallel.
The intermediate processor 22 comprises a tank body, a first stirrer and a first sludge discharge port, the first stirrer is arranged inside the tank body, the first sludge discharge port is arranged at the bottom of the tank body, quick lime is placed in the tank body, the biogas slurry pipeline 102 is connected with the lower part of the tank body and feeds biogas slurry into the tank body, the biogas pipeline 101 is connected with the bottom of the tank body and feeds biogas into the biogas slurry in the tank body, the biogas pipeline 101 is arranged at the top of the tank body at the outlet of the intermediate processor 22, and the filtered biogas is fed into the subsequent heat supply boiler 5 and the gas stove 6.
As the biogas generated by the household garbage contains 30-40% of carbon dioxide, the carbon dioxide is neither combustible nor combustion-supporting under the common conditions, the combustion of methane can be influenced, and simultaneously, carbon elements in the carbon dioxide can not be recycled, which is a problem in the utilization of rural biogas. In addition, the biogas slurry generated by the household garbage contains rich organic matters and possibly toxic and harmful substances generated in the fermentation process, and can be directly used as a carbon source to introduce new pollutants into the sewage, so the biogas slurry needs to be used after the early treatment.
The intermediate processor 22 is arranged in the treatment system, quicklime is placed in the intermediate processor 22, the quicklime generates calcium hydroxide when meeting water after biogas slurry is introduced, the quicklime and slaked lime have a certain purification effect on the biogas slurry, the biogas slurry is preheated by utilizing the heat released by the reaction of the quicklime, and the purified and preheated biogas slurry can be used as a carbon source of the sewage treatment device. After the biogas is introduced into the intermediate processor 22, the slaked lime in the biogas slurry has a certain effect on the solidification of the carbon dioxide, can absorb the carbon dioxide in the biogas to generate limestone and simultaneously improve the methane content. The excessive hydrated lime and limestone are deposited on the bottom of the tank body and are discharged from the first sludge discharge port.
One end of the first channel of the heat exchanger 8 is connected with a hot water pipeline 501 of the heat supply boiler, the other end of the first channel of the heat exchanger 8 is connected with the heating device 7, one end of the second channel of the heat exchanger 8 is connected with the reuse water storage tank 3, and the other end of the second channel of the heat exchanger 8 is connected with a water inlet of the outer cavity 203 of the fusiform shell. The heat generated by the methane combustion heats the water in the heat supply boiler 5, is used for heating and heat exchange, and the treated reclaimed water reaching the standard absorbs the heat of the boiler water in the heat exchanger 8 and returns to the sewage treatment device 2, so that the heating and heat preservation effects for biochemical treatment are improved.
Optionally, the treatment system further comprises a sewage storage tank 23, the domestic sewage is gathered into the sewage storage tank 23 and then connected with the water inlet pipe 9 of the sewage treatment device 2 through a pipeline, and when the water yield of the domestic sewage is large, the domestic sewage can be stored in the sewage storage tank 23 firstly; preferably, a second stirrer and a second sludge discharge port are arranged in the sewage storage tank 23, the sewage storage tank 23 can play a role of double charging of the regulating tank and the sedimentation tank, sewage is firstly subjected to standing and sedimentation to precipitate larger pollutants, the larger pollutants are discharged through the second sludge discharge port, and then the sewage is stirred by the second stirrer, so that the purpose of homogenization is achieved.
Optionally, the top end of the water outlet pipe 18 is connected with the reuse water storage tank 3 for temporarily storing the water body reaching the standard after treatment, and meanwhile, the reuse water storage tank 3 can also play a role of a secondary sedimentation tank to further purify the water body.
Optionally, the treatment system can flexibly select different types of microorganisms to carry out biofilm formation on the microorganism carrier 13 according to the characteristics of the pollutants in the domestic sewage, and the pollutants are degraded in a targeted manner. For example, if the concentration of COD in the wastewater is high, the common COD degrading bacteria are selected, and if the concentration of ammonia nitrogen in the wastewater is high, the anaerobic ammonium oxidation bacteria or nitrification/denitrification bacteria are selected.
Optionally, the treatment system may be provided with a plurality of sewage treatment devices 2 according to the type and concentration of the pollutants in the domestic sewage, and the sewage treatment devices are connected in series, that is, the water outlet pipe of the previous sewage treatment device is connected with the water inlet pipe of the next sewage treatment device, and the types of the microorganisms of different sewage treatment devices may be different or the same.
Optionally, each farmer family sets up a reuse water storage tank 3, and reuse water storage tank 3 is connected with field irrigation main canal 4 through irrigation pipe for converge unnecessary post-treatment water into field irrigation main canal 4, in order to be ready for field irrigation.
Claims (7)
1. A treatment system for rural decentralized domestic waste and sewage is characterized by comprising waste biogas devices, sewage treatment devices and reuse water storage tanks which are decentralized in residences of various peasants, and also comprising irrigation pipelines which connect each reuse water storage tank with a farmland irrigation main canal;
the biogas pipeline of the garbage biogas device is connected with a heat supply boiler and a gas stove in parallel, the hot water pipeline of the heat supply boiler is connected with a heating device and a heat exchanger, and the heat exchanger is connected with a sewage treatment device and is used for ensuring the biochemical treatment temperature of the sewage treatment device;
the biogas slurry pipeline of the garbage biogas device is connected with the sewage treatment device and is used for supplementing a carbon source required by biochemical treatment of the sewage treatment device; the sewage treatment device is connected with the reuse water storage tank and is used for temporarily storing the reuse water reaching the standard after treatment;
the sewage treatment device comprises a pretreatment area and a microorganism treatment area from bottom to top, wherein the pretreatment area and the microorganism treatment area are both positioned in the spindle-shaped shell;
the spindle-shaped shell is internally provided with an inner layer cavity and an outer layer cavity, the inner layer cavity is a pretreatment area and a microorganism treatment area, the outer layer cavity is a line channel and a heat preservation layer and is used for containing a line, a gas circuit and heat preservation hot water, and the outer wall of the outer layer cavity is provided with a water inlet and a water outlet;
the lower part of the garbage biogas device is provided with a biogas slurry pipeline which is sequentially connected with an intermediate processor and a water inlet pipe of a sewage treatment device;
the upper part of the garbage biogas device is provided with a biogas pipeline which is connected with the intermediate processor first and then connected with the heat supply boiler and the gas stove in parallel by the intermediate processor; quicklime is placed in a tank body of the intermediate processor and used for removing biogas slurry and carbon dioxide in the biogas, and simultaneously, the biogas slurry is preheated by using reaction heat;
one end of the first channel of the heat exchanger is connected with a hot water pipeline of the heat supply boiler, and the other end of the first channel of the heat exchanger is connected with heating equipment;
one end of a second channel of the heat exchanger is connected with the reuse water storage tank, and the other end of the second channel is connected with a water inlet of the outer layer cavity of the fusiform shell.
2. The treatment system according to claim 1, wherein the bottom of the pretreatment area is provided with a water inlet pipe, and the inside of the pretreatment area is provided with a filtering device;
an air outlet device is arranged at the lower part of the microorganism processing area and is connected with an air inlet on the spindle-shaped shell through an air conveying pipe, a microorganism carrier is arranged in the microorganism processing area, and a water outlet pipe is arranged at the top of the microorganism processing area.
3. The treatment system according to claim 2, wherein the pretreatment area is a vertically arranged cylindrical cavity which enters from the bottom of the spindle-shaped shell, penetrates through the outer layer cavity of the spindle-shaped shell and extends into the inner layer cavity, and the pretreatment area is arranged at the lower part of the spindle-shaped shell;
the bottom of the cylindrical cavity is provided with a water inlet pipe, and the inside of the cylindrical cavity is provided with a filtering device;
the filtering device is provided with a first filtering layer and a second filtering layer from top to bottom.
4. The treatment system of claim 3, wherein an air outlet device is arranged at the top of the cylindrical cavity of the pretreatment area, the air outlet device is arranged at the lower part of the microorganism treatment area, a microorganism carrier is arranged above the air outlet device, and the top of the microorganism carrier is fixedly connected with the filter column.
5. The processing system of claim 4, wherein the air outlet device comprises a plurality of air blowing nozzles, a plurality of one-way valves and an air outlet pipe, and each air blowing nozzle is connected to the air outlet pipe through one-way valve; the air outlet pipe is connected with an air inlet on the spindle-shaped shell through an air conveying pipe, and the air conveying pipe is located in the outer layer cavity of the spindle-shaped shell and penetrates through the wall surface to enter the inner layer cavity so as to be connected with the air outlet pipe.
6. The processing system of claim 4, wherein the microorganism carrier is divided into a plurality of vertically arranged carrier strings, and a plurality of carrier monomers are uniformly arranged on each carrier string and used for providing attachment sites for the thalli.
7. The treatment system of claim 1, wherein the intermediate processor comprises a tank, a first agitator and a first sludge discharge port, the first agitator is disposed inside the tank, and the first sludge discharge port is disposed at the bottom of the tank;
the biogas slurry pipeline is connected with the lower part of the tank body, and biogas slurry is introduced into the tank body;
the biogas pipeline is connected with the bottom of the tank body, biogas is introduced into biogas slurry in the tank body, the biogas pipeline is arranged at the top of the tank body at the outlet of the intermediate processor, and the filtered biogas is introduced into a subsequent heat supply boiler and a subsequent gas stove.
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