CN114105406A

CN114105406A - Household wet garbage and domestic sewage treatment system and treatment method

Info

Publication number: CN114105406A
Application number: CN202111271362.0A
Authority: CN
Inventors: 沙德宏; 吴佳; 黄家骧; 许良城; 季乐
Original assignee: JIANGSU HEHAI SUPPLY AND DRAINAGE WHOLE SET EQUIPMENT CO Ltd
Current assignee: JIANGSU HEHAI SUPPLY AND DRAINAGE WHOLE SET EQUIPMENT CO Ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-03-01
Anticipated expiration: 2041-10-29
Also published as: CN114105406B

Abstract

The invention discloses a household wet garbage and domestic sewage treatment system and a treatment method, wherein the system comprises a wet garbage cleaning pool, a wet garbage crusher, a sewage receiving pool, a sewage collecting pipe and a sectional treatment device, wherein the wet garbage cleaning pool is connected with the wet garbage crusher through a pool bottom connecting pipe, and the wet garbage crusher is connected with the sewage collecting pipe; the sewage receiving tank is connected with the sewage collecting pipe through a sewage discharge pipe at the bottom of the tank; the sewage collecting pipe is connected with the sectional type treatment device; the sectional type processing device is of a barrel-shaped structure, a top cover is arranged at the top of the sectional type processing device, a section partition plate is arranged at the bottom of the sectional type processing device, and a first section device, a second section device, a third section device, a fourth section device and a fifth section device are sequentially arranged in the sectional type processing device from inside to outside. The treatment method comprises the steps of collecting and crushing wet garbage, collecting sewage and carrying out one-stage to five-stage degradation treatment, so that the wet garbage can be finally recycled after reaching the standard, and the treatment method has the advantages of high efficiency, simplicity, convenience, low energy consumption, low investment, low cost and the like.

Description

Household wet garbage and domestic sewage treatment system and treatment method

Technical Field

The invention belongs to the technical field of garbage treatment, and particularly relates to a household wet garbage and domestic sewage treatment system and a household wet garbage and domestic sewage treatment method.

Background

The rural domestic sewage is distributed in population and not easy to collect, so that the rural domestic sewage has the characteristics of multiple sources, wide pollution area, large day and night change, small night water discharge, low contents of heavy metals and toxic and harmful substances in water, and strong biodegradability mainly containing nitrogen, phosphorus and the like. At present, the treatment of domestic wastewater in villages in China is relatively lagged, and the aspects of incomplete pipe network construction, low facility coverage rate, poor operation efficiency and the like exist. Many remote rural areas even do not have any domestic sewage treatment measures, still adopt a ditch and river discharging mode, and a large amount of domestic sewage is not treated, thereby causing adverse effects on local human living environment.

Aiming at the characteristics of rural domestic sewage treatment, the development and development work of rural domestic sewage treatment technology is developed from the 80 th century in China, and a plurality of new products, new technologies and new devices are applied, such as treatment technologies and methods of an activated sludge method, a biological rotating disc, a biological filter, a stabilization pond, an oxidation ditch, an artificial wetland, biochemical integration, a purification tank and the like. However, the treatment techniques and methods have some problems, some of which cannot be buried by adopting a water drop mode; some ring structures are divided to reduce the volume load, so that the treatment is not up to the standard; some processes are only suitable for single domestic sewage, but are not suitable for being treated together with wet garbage; the structure and the flow are too complex, the sewage needs to be treated in a centralized way, and the sewage is not suitable for households. In a word, the treatment technologies and methods firstly have high investment, operation, maintenance and other costs, need large-scale construction of a pipe network, do not correspond to special rural residence environments, and cause lower use rate in rural areas; and secondly, the collection, treatment and discharge of the dispersed sewage are partially realized, and the on-site treatment and resource utilization of the wet garbage are not achieved.

Disclosure of Invention

In order to better well manage the country water polluted environment, develop a new technology meeting the development requirement of the country household sewage treatment in China and effectively solve the technical defects of the prior art, the invention provides a household wet garbage and domestic sewage treatment system and a treatment method, which have the advantages of high efficiency, simplicity, low energy consumption, low investment, low cost and the like, can be collected and treated on site, are convenient for large-scale construction, and are beneficial to large-scale popularization.

The invention is realized by the following technical scheme:

a household wet garbage and domestic sewage treatment system comprises a wet garbage cleaning pool, a wet garbage crusher, a sewage receiving pool, a sewage collecting pipe and a sectional treatment device, wherein,

the wet garbage cleaning pool is connected with the wet garbage crusher through a pool bottom connecting pipe, and an outlet of the wet garbage crusher is connected with the sewage collecting pipe; the sewage receiving tank is connected with the sewage collecting pipe through a sewage discharge pipe at the bottom of the tank; the sewage collecting pipe is connected with the sectional type treatment device;

the sectional type treatment device is of a barrel-shaped structure, a top cover is arranged at the top of the sectional type treatment device, a bottom plate is arranged at the bottom of the sectional type treatment device, and a first section device, a second section device, a third section device, a fourth section device and a fifth section device are sequentially arranged in the sectional type treatment device from inside to outside; the outlet of the sewage collecting pipe penetrates through the top cover and is inserted into the upper part of the section of the device; the two-section device, the three-section device, the four-section device and the five-section device are all internally provided with a section partition plate;

the section of device is arranged at the innermost side of the sectional type treatment device and comprises a section of shell, a section of discharge pipe fixing plate, a section of sludge inlet pipe, a sewage distributor, a driver and a section of filler; the inlet end of the section of discharge pipe is close to the bottom of the section of device, the outlet end of the section of discharge pipe is fixed on the section of discharge pipe fixing plate, and the section of discharge pipe fixing plate is arranged at the top of the section of device; the sewage distributor is arranged below the top cover, and the outlet of the section of sludge inlet pipe is arranged at the upper part of the sewage distributor; the shell of the first section of device is a section of shell, and the area of the first section of shell, which is fixed by a section of discharge pipe, is provided with an overflow port; the driver is arranged on the bottom side surface of the section of the shell, and the driving surface faces inwards; the section of filling material is filled below the sewage distributor and is suspended in the middle of the section of device;

the second-section device is arranged on the outer side of the first-section device and comprises a second-section shell, a second-section inlet pipe fixing plate, a second-section sludge inlet pipe and a second-section filler; the second-section inlet pipe fixing plate is arranged at the top of the second-section device, the inlet end of the second-section inlet pipe is fixed on the second-section inlet pipe fixing plate, and the outlet of the second-section inlet pipe is close to the bottom of the second-section device; the shell of the second-stage device is a second-stage shell, and an overflow port is formed in the area of the third-stage inlet pipe fixing plate of the second-stage shell; the second-stage sludge inlet pipe is inserted from the upper part of the second-stage device, and the outlet of the second-stage sludge inlet pipe is close to the bottom of the second-stage device; the second-stage filler is filled in the second-stage device and suspended in the middle of the second-stage device;

the three-section device is arranged on the outer side of the two-section device and comprises a three-section shell, three-section inlet pipes, three-section inlet pipe fixing plates, three-section sludge inlet pipes and three-section fillers; the three-section inlet pipe fixing plate is arranged at the top of the three-section device, the inlet end of the three-section inlet pipe is fixed on the three-section inlet pipe fixing plate, and the outlet of the three-section inlet pipe is close to the bottom of the three-section device; the shell of the three-section device is a three-section shell, and overflow ports are formed in the areas of four sections of inlet pipe fixing plates of the three-section shell; the three sections of sludge inlet pipes are inserted from the upper parts of the three sections of devices, and the outlets of the three sections of sludge inlet pipes are close to the bottoms of the three sections of devices; the three sections of fillers are filled in the three sections of devices and suspended in the middle of the three sections of devices;

the four-section device is arranged at the outer side of the three-section device and comprises a four-section shell, a four-section inlet pipe fixing plate, a vortex air pump, an air distribution pipe and four-section fillers; the four-section inlet pipe fixing plate is arranged at the top of the four-section device, the inlet end of the four-section inlet pipe is fixed on the four-section inlet pipe fixing plate, and the outlet of the four-section inlet pipe is close to the bottom of the four-section device; the shell of the four-section device is a four-section shell, and overflow ports are formed in the four-section shell in the areas of the five-section inlet pipe fixing plates; the four-section filler is filled in the four-section device and suspended in the middle of the four-section device; the vortex air pump is arranged on the top cover, and the outlet of the vortex air pump is connected with the air distribution pipe; the air distribution pipe is arranged at the bottom of the four-section device and is arranged around a circle;

the five-section device is arranged on the outermost side of the sectional type treatment device and comprises an outer shell, a five-section inlet pipe fixing plate, a sludge circulating pump, a sludge circulating pipe and five-section fillers; the five-section inlet pipe fixing plate is arranged at the top of the five-section device, the inlet end of the five-section inlet pipe is fixed on the five-section inlet pipe fixing plate, and the outlet of the five-section inlet pipe is close to the bottom of the five-section device; the shell of the five-section device is an outer shell, and a water outlet connecting pipe is arranged on the upper side surface of the outer shell; the five sections of fillers are filled in the five sections of devices and suspended in the middle of the five sections of devices; the sludge circulating pump is arranged at the bottom of the five-section device, the outlet of the sludge circulating pump is connected with the inlet of the sludge circulating pipe, and the outlet of the sludge circulating pipe is respectively connected with the inlets of the first-section sludge inlet pipe, the second-section sludge inlet pipe and the third-section sludge inlet pipe.

Preferably, the crushing fineness of the wet garbage crusher is more than 45 meshes.

Preferably, the effective volume of the section of the device is more than 2 times of the total volume of the wet garbage and the domestic sewage treated every day.

Preferably, the first section of filler is an elastic three-dimensional high molecular polymer and accounts for 80% of the effective volume of the first section of device; the second-stage packing is a combined porous ring and occupies 75% of the effective volume of the second-stage device; the three-stage filler is polyhedral hollow sphere polypropylene and ceramsite with the volume ratio of 1:1, and accounts for 75% of the effective volume of the three-stage device; the four-section filler is reticular polyurethane and accounts for 75% of the effective volume of the four-section device; the five-section filler is volcanic rock, quartz sand and activated carbon, the volume ratio of the filler to the activated carbon is 1.5:0.5:1, and the filler accounts for 70% of the effective volume of the five-section device.

Preferably, the elastic polymer is a polyester amide fiber.

Preferably, the outlet of the waste water header is above the liquid level.

Preferably, the sewage collecting pipe and the section of sludge inlet pipe are inserted into a section of device at the same depth and at an intermediate position above the sewage distributor; the depth of the second-section inlet pipe and the depth of the second-section sludge inlet pipe inserted into the second-section device are the same; the three sections of inlet pipes and the three sections of sludge inlet pipes are inserted into the three sections of devices at the same depth and are arranged close to each other in parallel.

A treatment method based on the household wet garbage and domestic sewage treatment system comprises the following steps:

step 1) wet garbage in a wet garbage cleaning tank enters a wet garbage crusher through a tank bottom connecting pipe, the crushed wet garbage and sewage discharged from a sewage receiving tank through a sewage discharge pipe are merged into a sewage collecting pipe, the sewage penetrating through a top cover enters a sewage collecting pipe of a section of device and is discharged onto a sewage distributor through a sewage collecting pipe outlet, the sewage uniformly passes through a section of filler and then enters a section of discharge pipe inlet close to a section of shell, and then the sewage overflows from a section of discharge pipe outlet fixed by a section of discharge pipe fixing plate; the first section of device has the functions of collecting, storing and adjusting the sewage quantity and degrading large particles into small particles or completely degrading the large particles, and the sewage and sludge entering the first section of device are fully mixed under the action of the driver;

step 2) sewage overflows to a second-section inlet pipe inlet fixed by a second-section inlet pipe fixing plate, enters a second-section device through a second-section inlet pipe outlet, and overflows after circulating a circle of sewage and passing through a second-section filler; the two-stage device has the functions of anaerobism and small-amount small particle degradation;

step 3) sewage overflows to a three-section inlet pipe inlet which is fixed by a three-section inlet pipe fixing plate and is close to the two-section shell, and enters into a three-section device through a three-section inlet pipe outlet, and sewage flows around a circle and overflows after passing through three-section fillers; the three-section device has the function of oxygen deficiency;

step 4), sewage overflows to a four-section inlet pipe inlet which is fixed by a four-section inlet pipe fixing plate and is close to a three-section shell, enters a four-section device through a four-section inlet pipe outlet, and overflows after circulating a circle of sewage and passing through four-section fillers; the four-section device has an aerobic function, and the vortex air pump arranged on the top cover sends air into a circle of air distribution pipes surrounding the bottom of the four-section device and enters sewage of the four-section device so as to meet the process requirements;

step 5) sewage overflows to an inlet of a five-section inlet pipe which is fixed by a fixing plate of the five-section inlet pipe and is close to a four-section shell, and enters a five-section device through an outlet of the five-section inlet pipe, wherein the five-section device has the functions of aerobic treatment, sedimentation and filtration, and a sludge circulating pump arranged at the bottom of the five-section device respectively sends sludge to a sewage distributor and the bottoms of the two-section device and the three-section device through a sludge circulating pipe and a first-section sludge inlet pipe, a second-section sludge inlet pipe and a third-section sludge inlet pipe;

and 6) circulating the sewage for one circle in the second-section device, the third-section device and the fourth-section device, separating the sewage by the partition plates to enter the lower section, circulating the sewage for one circle in the fifth-section device, separating the sewage by the partition plates after filling the sewage for five sections, and discharging the sewage from a water outlet connecting pipe on the side surface of the outer shell to a recycling site after reaching the standard.

The invention has the following beneficial effects:

(1) the multi-layer circulation pushing device is formed by adopting barrels with different sizes, mainly takes advection and laminar flow, has uniform water distribution, does not form short flow and dead angle, and has novel structure and reasonable flow. When sewage flows circularly in the treatment system, the sewage is degraded stage by stage in a multi-latitude step-by-stage manner, the smaller volume achieves the strongest volume load, the treatment effect is optimal, the purpose of reducing the volume of equipment is achieved, and the occupied area is small.

(2) The depth of the sewage collecting pipe entering the first section of device and the depth of the sludge inlet pipe entering the first section of device are the same, when sewage and sludge enter the first section of device together, the sewage and sludge are driven by the driver, and meanwhile, the two-section inlet pipe and the two-section sludge inlet pipe and the three-section sludge inlet pipe are close to each other in parallel, so that the sewage and sludge are mixed fully, the sewage treatment process is accelerated, the sewage treatment period is effectively shortened, and the treatment efficiency is improved.

(3) The section of the filler is reasonable in selection, scientific in proportioning, large in specific surface area, fast in microorganism biofilm formation, strong in hydraulic impact resistance and small in sludge amount.

(4) According to the process flow, various carriers, components in the device and the like are highly integrated in a smaller space range, so that the kitchen wet garbage and the domestic sewage are continuously and internally circulated in a smaller container according to a set route, fully contact with the various carriers, and are rapidly degraded by pollutants in a microbial system, thereby obtaining the superior effluent quality.

(5) The process technology treats the wet garbage and the domestic sewage in a synergistic manner, fully utilizes pollution factors such as organic carbon sources and the like in the wet garbage and the domestic sewage, establishes a positive complementary relationship for nutrient substances required by the synergistic treatment between the wet garbage and the domestic sewage, achieves a stable balanced state, utilizes resources in the wet garbage, does not need to supplement and add nutrient substances and medicine, reduces investment and operation cost, and solves the pollution problem of the wet garbage. Meanwhile, the method breaks through the constraint of the flow transmission concept, provides a new technical approach for treating the pollution of household wet garbage and domestic sewage, and has wide development prospect.

(6) The treatment system of the present invention is suitable for both underground and ground installation.

Drawings

FIG. 1 is a schematic view of a household wet garbage and domestic sewage treatment system;

FIG. 2 is a cross-sectional view taken at location A-A of FIG. 1;

in the figure: 1. a wet garbage cleaning tank; 2. a pool bottom connecting pipe; 3. a wet garbage crusher; 4. a sewage receiving tank; 5. a sewage discharge pipe; 6. a sewage collecting pipe; 7. a top cover; 8. a section of equipment; 9. a second stage device; 10. three-stage device; 11. a four-stage device; 12. five sections of devices; 13. a segment spacer plate; 14. a section of discharge pipe; 15. a second section of inlet pipe; 16. three sections of inlet pipes; 17. a fourth section of inlet pipe; 18. five sections of inlet pipes; 19. a section of discharge pipe fixing plate; 20. a two-section inlet pipe fixing plate; 21. three sections of inlet pipe fixing plates; 22. a four-section inlet pipe fixing plate; 23. five sections of inlet pipe fixing plates; 24. a water outlet connecting pipe; 25. a sludge circulating pump; 26. a sludge circulation pipe; 27. three sections of sludge inlet pipes; 28. a second-stage sludge inlet pipe; 29. a section of sludge inlet pipe; 30. a driver; 31. a vortex air pump; 32. an air distribution pipe; 33. a section of filler; 34. a second section of filler; 35. three sections of fillers; 36. four sections of fillers; 37. five sections of fillers; 38. a sewage distributor; 39. a section of shell; 40. a two-section shell; 41. three sections of shells; 42. a four-section shell; 43. an outer housing.

Detailed Description

The invention is described in further detail below with reference to specific embodiments and with reference to the following drawings.

Example 1

A household wet garbage and domestic sewage treatment system is shown in figure 1 and comprises a wet garbage cleaning pool 1, a wet garbage crusher 3, a sewage receiving pool 4, a sewage collecting pipe 6 and a sectional type treatment device.

As shown in fig. 1, the wet garbage cleaning tank 1 is connected with the wet garbage crusher 3 through a tank bottom connecting pipe 2, and the outlet of the wet garbage crusher 3 is connected with the sewage collecting pipe 6; the sewage receiving tank 4 is connected with the sewage collecting pipe 6 through a sewage discharge pipe 5 at the bottom of the tank; the sewage collecting pipes 6 are connected with the sectional type treatment device, the number of the inlet ends of the sewage collecting pipes 6 is 2, and the number of the outlet ends of the sewage collecting pipes 6 is 1.

As shown in fig. 1, the sectional treatment device is a barrel-shaped structure, the top of the sectional treatment device is provided with a top cover 7, the bottom of the sectional treatment device is a bottom plate, and a first-section device 8, a second-section device 9, a third-section device 10, a fourth-section device 11 and a fifth-section device 12 are sequentially arranged in the sectional treatment device from inside to outside; the outlet of the header 6 passes through the top cover 7 and is inserted into the upper part of the length of equipment 8.

As shown in fig. 2, the two-stage device 9, the three-stage device 10, the four-stage device 11 and the five-stage device 12 are all provided with a stage partition plate 13 therein.

As shown in fig. 1 and 2, the segment of the device 8 is arranged at the innermost side of the sectional type processing device and comprises a segment of the shell 39, a segment of the discharge pipe 14, a segment of the discharge pipe fixing plate 19, a segment of the sludge inlet pipe 29, a sewage distributor 38, a driver 30 and a segment of the packing 33; the inlet end of the section of discharge pipe 14 is close to the bottom of the section of device 8, the outlet end of the section of discharge pipe 14 is fixed on the section of discharge pipe fixing plate 19, and the section of discharge pipe fixing plate 19 is arranged at the top of the section of device 8; the sewage distributor 38 is arranged below the top cover 7, and the outlet of the section of sludge inlet pipe 29 is arranged at the upper part of the sewage distributor 38; the shell of the first section of the device 8 is a first section of the shell 39, and the first section of the shell 39 is provided with an overflow port in the area of the first section of the discharge pipe fixing plate 19; the driver 30 is mounted on the bottom side of the length of casing 39 with the driving surface facing inwardly; the section of packing 33 is filled below the sewage distributor 38 and suspended in the middle of the section of device 8.

As shown in fig. 1 and 2, the second stage device 9 is disposed outside the first stage device 8, and includes a second stage housing 40, a second stage inlet pipe 15, a second stage inlet pipe fixing plate 20, a second stage sludge inlet pipe 28, and a second stage packing 34; the two-section inlet pipe fixing plate 20 is arranged at the top of the two-section device 9, the inlet end of the two-section inlet pipe 15 is fixed on the two-section inlet pipe fixing plate 20, and the outlet of the two-section inlet pipe 15 is close to the bottom of the two-section device 9; the shell of the two-section device 9 is a two-section shell 40, and the two-section shell 40 is provided with an overflow port in the area of the three-section inlet pipe fixing plate 21; the second-stage sludge inlet pipe 28 is inserted from the upper part of the second-stage device 9, and the outlet of the second-stage sludge inlet pipe is close to the bottom of the second-stage device 9; the secondary packing 34 is filled inside the secondary device 9 and suspended in the middle of the secondary device 9.

As shown in fig. 1 and 2, the three-stage device 10 is arranged outside the two-stage device 9, and includes a three-stage housing 41, a three-stage inlet pipe 16, a three-stage inlet pipe fixing plate 21, a three-stage sludge inlet pipe 27, and a three-stage filler 35; the three-section inlet pipe fixing plate 21 is arranged at the top of the three-section device 10, the inlet end of the three-section inlet pipe 16 is fixed on the three-section inlet pipe fixing plate 21, and the outlet of the three-section inlet pipe 16 is close to the bottom of the three-section device 10; the shell of the three-section device 10 is a three-section shell 41, and overflow ports are formed in the areas of four sections of inlet pipe fixing plates 22 of the three-section shell 41; the three sections of sludge inlet pipes 27 are inserted from the upper part of the three sections of devices 10, and the outlets of the three sections of sludge inlet pipes are close to the bottom parts of the three sections of devices 10; the three-stage packing 35 is filled in the three-stage device 10 and suspended in the middle of the three-stage device 10.

As shown in fig. 1 and 2, the four-section device 11 is disposed outside the three-section device 10, and includes a four-section housing 42, a four-section inlet pipe 17, a four-section inlet pipe fixing plate 22, a vortex air pump 31, an air distribution pipe 32, and a four-section filler 36; the four-section inlet pipe fixing plate 22 is arranged at the top of the four-section device 11, the inlet end of the four-section inlet pipe 17 is fixed on the four-section inlet pipe fixing plate 22, and the outlet of the four-section inlet pipe 17 is close to the bottom of the four-section device 11; the shell of the four-section device 11 is a four-section shell 42, and the four-section shell 42 is provided with an overflow port in the area of the five-section inlet pipe fixing plate 23; the four-section packing 36 is filled in the four-section device 11 and suspended in the middle of the four-section device 11; the vortex air pump 31 is arranged on the top cover 7, and the outlet of the vortex air pump is connected with the air distribution pipe 32; the air distribution pipe 32 is arranged at the bottom of the four-section device 11 and is arranged around a circle.

As shown in fig. 1 and 2, the five-stage device 12 is disposed at the outermost side of the sectional treatment device, and includes an outer shell 43, a five-stage inlet pipe 18, a five-stage inlet pipe fixing plate 23, a sludge circulation pump 25, a sludge circulation pipe 26 and a five-stage filler 37; the five-section inlet pipe fixing plate 23 is arranged at the top of the five-section device 12, the inlet end of the five-section inlet pipe 18 is fixed on the five-section inlet pipe fixing plate 23, and the outlet of the five-section inlet pipe 18 is close to the bottom of the five-section device 12; the shell of the five-section device 12 is an outer shell 43, and the upper side surface of the outer shell 43 is provided with a water outlet connecting pipe 24; the five-section filling material 37 is filled in the five-section device 12 and suspended in the middle of the five-section device 12; the sludge circulating pump 25 is installed at the bottom of the five-section device 12, the outlet of the sludge circulating pump is connected with the inlet of the sludge circulating pipe 26, and the outlet of the sludge circulating pipe 26 is respectively connected with the inlets of the first-section sludge inlet pipe 29, the second-section sludge inlet pipe 28 and the third-section sludge inlet pipe 27.

In a preferable mode, the wet garbage crusher 3 is a special device capable of determining the capacity according to the generation amount of household garbage, and the crushing fineness is more than 45 meshes.

In a preferred embodiment, the effective volume of the section of the device 8 is more than 2 times of the total volume of the wet garbage and domestic sewage treated each day, namely, when the sewage enters the treatment system of the embodiment, the sewage in the previous period is gradually pushed forward, and the sewage stored in the treatment system in the previous period reaches the qualified requirement, so that the next treatment period is started. The time requirement is effectively processed under the normal rule.

In the treatment system, each section of device is a functional area consisting of barrel bodies with different sizes, wherein one section of device 8 has the functions of collecting, storing and adjusting sewage quantity and degrading large particles into small particles or until the large particles are completely degraded, the second section of device 9 has the functions of anaerobism and degrading small particles, the third section of device 10 has the function of oxygen deficiency, the fourth section of device 11 has the function of aerobiosis, and the fifth section of device 12 has the functions of aerobiosis, sedimentation and filtration.

In the treatment system, the fillers of each section are different, and the filler 33 of one section is elastic three-dimensional high molecular polymer and occupies 80 percent of the effective volume of the device 8 of one section; the second-stage packing 34 is a combined porous ring and occupies 75% of the effective volume of the second-stage device 9; the three-stage filler 35 is polyhedral hollow sphere polypropylene and ceramsite with the volume ratio of 1:1, and occupies 75% of the effective volume of the three-stage device 10; the four-section filler 36 is reticular polyurethane and occupies 75% of the effective volume of the four-section device 11; the five-section filler 37 is volcanic rock, quartz sand and activated carbon, the volume ratio is 1.5:0.5:1, and the five-section filler accounts for 70% of the effective volume of the five-section device 12.

In a preferred embodiment, the outlet of the waste water header 6 into a section of the device 8 is not inserted below the liquid level. The sewage in one section of the device 8 is high in inlet and low in outlet, the just-entering sewage is more oil-stained, the oil is generally floated above the liquid level due to the fact that the specific gravity of the oil is smaller than that of water, if the oil overflows from the upper side, the undegraded oil stains can be moved backwards, and if the outlet of the sewage collecting pipe 6 is inserted below the liquid level, the undegraded oil stains can also be moved backwards.

In a preferred embodiment, the sewage collecting pipe 6 is inserted into a section of the device 8 at the same depth as the section of the sludge inlet pipe 29 and at an intermediate position above the sewage distributor 38; the depth of the second-stage inlet pipe 15 and the depth of the second-stage sludge inlet pipe 28 inserted into the second-stage device 9 are the same; the three sections of inlet pipes 16 and the three sections of sludge inlet pipes 27 are inserted into the three sections of devices 10 to the same depth and are arranged in parallel and close to each other.

Example 2

A method for treating household wet garbage and domestic sewage is based on a treatment system described in embodiment 1, and is shown in figures 1 and 2, wherein the direction shown by an arrow in the figures is the flowing process direction of sewage in the treatment system, and the method comprises the following specific steps:

(1) wet garbage in a wet garbage cleaning pool 1 enters a wet garbage crusher 3 through a pool bottom connecting pipe 2, the crushed wet garbage and sewage discharged from a sewage receiving pool 4 through a sewage discharge pipe 5 are merged into a sewage collecting pipe 6, the sewage penetrating through a top cover 7 and entering the sewage collecting pipe 6 of a section of device 8 is discharged onto a sewage distributor 38 through an outlet of the sewage collecting pipe 6, uniformly passes through a section of filler 33 and then enters an inlet of a section of discharge pipe 14 close to a section of shell 39, and then overflows through an outlet of a section of discharge pipe 14 fixed by a section of discharge pipe fixing plate 19. The sewage and sludge entering the first section of the device 8 are fully mixed under the action of the driver 30.

One section of the device 8 has the functions of collecting, storing, regulating the amount of sewage and degrading large particles into small particles or until complete degradation. The first stage of packing 33 is a polyester amide fiber and occupies 80% of the effective volume of the first stage of device 8. The effective volume of the first section of the device 8 in the embodiment is 2.15 times of the total volume of the wet garbage and the domestic sewage treated daily.

The pollution index of wet garbage and domestic sewage in a section of device 8 reaches 31.72% (wherein the solid particles reach 90.65%).

(2) The sewage overflows to the inlet of the second-section inlet pipe 15 fixed by the second-section inlet pipe fixing plate 20, enters the second-section device 9 through the outlet of the second-section inlet pipe 15, and flows around one circle to overflow after passing through the second-section filler 34.

The two-stage device 9 has the functions of anaerobic treatment and small-amount small-particle degradation. The second stage packing 34 is a combined porous ring, and occupies 75% of the effective volume of the second stage device 9.

The degradation rate of the pollution index of the wet garbage and the domestic sewage in the two-stage device 9 reaches 24.87% (the remaining fine particles reach 99.79%).

(3) The sewage overflows to the inlet of the three-section inlet pipe 16 fixed by the three-section inlet pipe fixing plate 21 and close to the two-section shell 40, enters the three-section device 10 through the outlet of the three-section inlet pipe 16, and overflows after circulating a circle of sewage and passing through the three-section filler 35.

The three-stage device 10 has an oxygen deprivation function. The three-section filler 35 is polyhedral hollow sphere polypropylene and ceramsite, the volume ratio is 1:1, and the three-section filler accounts for 75% of the effective volume of the three-section device 10.

The degradation rate of the pollution index of the wet garbage and the domestic sewage in the three-stage device 10 reaches 22.03 percent.

(4) The sewage overflows to the inlet of the four-section inlet pipe 17 fixed by the four-section inlet pipe fixing plate 22 and close to the three-section shell 41, enters the four-section device 11 through the outlet of the four-section inlet pipe 17, and flows out after flowing through the four-section filler 36. The vortex air pump 31 arranged on the top cover 7 sends air into the air distribution pipe 32 which surrounds the bottom of the four-section device 11 in a circle and enters the sewage of the four-section device 11 so as to meet the process requirements.

The four-stage device 11 has an aerobic function. The four-stage packing 36 is reticulated polyurethane, which accounts for 75% of the effective volume of the four-stage device 11.

The degradation rate of the pollution index of wet garbage and domestic sewage in the four-section device 11 reaches 13.46 percent.

(5) The sewage overflows to the inlet of the five-section inlet pipe 18 fixed by the five-section inlet pipe fixing plate 23 and close to the four-section shell 42, and enters the five-section device 12 through the outlet of the five-section inlet pipe 18, and the sludge circulating pump 25 arranged at the bottom of the five-section device 12 sends the sludge to the sewage distributor 38 and the bottoms of the two-section device 9 and the three-section device 10 respectively through the first-section sludge inlet pipe 29, the second-section sludge inlet pipe 28 and the third-section sludge inlet pipe 27 through the sludge circulating pipe 26.

The five-section device 12 has the functions of aerobic treatment, sedimentation and filtration.

(6) The sewage is separated by the section partition plate 13 and enters the lower section after circulating for one circle in the second section device 9, the third section device 10 and the fourth section device 11, and is separated by the section partition plate 13 after circulating for one circle in the fifth section device 12, and is discharged to a recycling place after reaching the standard from the water outlet connecting pipe 24 on the side surface of the outer shell 43 after passing through the five sections of packing 37.

The five-section filler 37 is volcanic rock, quartz sand and activated carbon, the volume ratio is 1.5:0.5:1, and the five-section filler accounts for 70% of the effective volume of the five-section device 12.

The degradation rate of the pollution index of the wet garbage and the domestic sewage in the five-section device 12 reaches 7.11 percent, and the total degradation rate reaches 99.19 percent.

Claims

1. A household wet garbage and domestic sewage treatment system is characterized by comprising a wet garbage cleaning pool, a wet garbage crusher, a sewage receiving pool, a sewage collecting pipe and a sectional type treatment device, wherein,

2. The system for treating household wet garbage and domestic sewage according to claim 1, wherein the crushing fineness of the wet garbage crusher is 45 meshes or more.

3. The system of claim 1, wherein the effective volume of the section of the device is more than 2 times the total volume of wet garbage and domestic sewage treated daily.

4. The system for treating household wet garbage and domestic sewage according to claim 1, wherein the first section of filler is elastic stereo high molecular polymer, and occupies 80% of the effective volume of the first section of device; the second-stage packing is a combined porous ring and occupies 75% of the effective volume of the second-stage device; the three-stage filler is polyhedral hollow sphere polypropylene and ceramsite with the volume ratio of 1:1, and accounts for 75% of the effective volume of the three-stage device; the four-section filler is reticular polyurethane and accounts for 75% of the effective volume of the four-section device; the five-section filler is volcanic rock, quartz sand and activated carbon, the volume ratio of the filler to the activated carbon is 1.5:0.5:1, and the filler accounts for 70% of the effective volume of the five-section device.

5. The system as claimed in claim 4, wherein the elastic polymer is a polyester amide fiber.

6. The system of claim 1, wherein the outlet of the header is above the liquid level.

7. The system of claim 1, wherein the sewage collection pipe and the sludge inlet pipe are inserted into a device at the same depth and at an intermediate position above the sewage distributor; the depth of the second-section inlet pipe and the depth of the second-section sludge inlet pipe inserted into the second-section device are the same; the three sections of inlet pipes and the three sections of sludge inlet pipes are inserted into the three sections of devices at the same depth and are arranged close to each other in parallel.

8. The treatment method of the household wet garbage and domestic sewage treatment system based on any one of claims 1-7, characterized by comprising the following steps: