CN113387530A - Septic tank and application - Google Patents
Septic tank and application Download PDFInfo
- Publication number
- CN113387530A CN113387530A CN202110340858.2A CN202110340858A CN113387530A CN 113387530 A CN113387530 A CN 113387530A CN 202110340858 A CN202110340858 A CN 202110340858A CN 113387530 A CN113387530 A CN 113387530A
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- zone
- septic tank
- anaerobic
- aerobic
- baffle plate
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
Abstract
The invention belongs to the technical field of liquid dung treatment, and discloses a septic tank and application thereof, wherein the septic tank comprises a liquid dung separating zone, an anaerobic zone, an aerobic zone and a precipitation filtering zone which are sequentially communicated, and the anaerobic zone comprises a baffle plate; a first water passing port is reserved between the baffle plate and the bottom of the septic tank; an overflow port is reserved between the baffle plate and the top of the septic tank. According to the invention, the baffle plate is adopted to optimize the flow state of the anaerobic zone, and the separation of acid-producing bacteria and methanogenic bacteria is sequentially realized in the compartments which are formed in series in the water flow direction, so that the separation of two bacteria (2 compartments) or multiple bacteria (multi-compartment) is realized in a single reactor, and the anaerobic digestion effect is enhanced.
Description
Technical Field
The invention relates to the technical field of liquid dung treatment, in particular to a septic tank and application thereof.
Background
The description of the background of the invention pertaining to the related art to which this invention pertains is given for the purpose of illustration and understanding only of the summary of the invention and is not to be construed as an admission that the applicant(s) explicitly or putatively admitted the prior art of the filing date of the first-filed application of the present invention.
The volume ratio of the traditional three-grid septic tank is 2:1:3, and the septic tank mainly settles large granular substances (forms sediment) or floats (forms scum) in domestic sewage under the action of gravity; under the action of anaerobic zymophyte, partial organic matters are degraded through anaerobic fermentation, and then the primary treatment of sewage is realized. Due to the limitation of the volume of the septic tank, the hydraulic retention time of the traditional septic tank is too short, the flow state in the septic tank is slow, so that the dead water area in the septic tank is too much, the effective volume of the septic tank is reduced, the types of microorganisms in the septic tank are relatively few, the decomposition of the microorganisms on organic matters in the excrement is not facilitated, the concentration of pollutants in the effluent of the septic tank is too high due to the reasons, such as COD400mg/L, ammonia nitrogen 70mg/L, total nitrogen 75mg/L and total phosphorus 6mg/L, SS 65mg/L, the effluent is also required to be conveyed to a subsequent treatment section by a pipeline, and on one hand, pipeline leakage and odor discharged by anaerobic reaction can cause on-way pollution; on the other hand, piping and back-end treatment can increase construction investment and operating costs.
The invention develops a domestic sewage treatment technology integrating the functions of septic treatment and sewage treatment, can directly purify the toilet liquid manure to the domestic sewage discharge standard, reduce the discharge of pollutants to the environment, and can realize on-site resource utilization of the effluent
Disclosure of Invention
The invention aims to provide a septic tank and application thereof, and the invention optimizes hydraulic flow state by adopting baffle plates to promote anaerobic digestion; the filling material is added, and the sludge content in the anaerobic and aerobic areas is improved; and the filter material is added, phosphorus is removed, and other water quality indexes are guaranteed to reach the standard.
The purpose of the invention is realized by the following technical scheme:
the embodiment of the first aspect of the invention provides a septic tank, which comprises a feces and sewage separation zone, an anaerobic zone, an aerobic zone and a precipitation and filtration zone which are communicated in sequence, wherein the anaerobic zone comprises a baffle plate; a first water passing port is reserved between the baffle plate and the bottom of the septic tank; an overflow port is reserved between the baffle plate and the top of the septic tank, and a sludge reflux device is arranged between the aerobic zone and the sedimentation filtering zone.
Furthermore, the volume ratio of the manure separation zone, the anaerobic zone, the aerobic zone and the precipitation filtration zone is as follows: 2:1:1:3 or 2:2:1: 2.
Further, the number of the baffle plates is 1, and the baffle plates divide the anaerobic zone into a pre-anaerobic zone and a deep anaerobic zone; the volume ratio of the manure separation zone, the pre-anaerobic zone, the deep anaerobic zone, the aerobic zone and the precipitation filtration zone is 2:1:1:1: 2.
Further, the number of the baffles is more than or equal to 2.
It should be noted here that the number of the baffles is not limited, and only an appropriate number of baffles needs to be selected as needed.
Furthermore, a solar micro-aeration device is arranged at the top of the septic tank and is communicated with an aeration head at the bottom of the aerobic zone.
Furthermore, filler plates are arranged in each of the anaerobic zone, the aerobic zone and the precipitation filtering zone, and the filler plates are hollow plates with holes at the periphery; the filler plate is filled with filler; the fillers of the anaerobic zone and the aerobic zone are polyurethane fillers; the filler of the precipitation filtering area is zeolite and volcanic rock.
Furthermore, the volume of the packing plates of the anaerobic zone and the aerobic zone is 20-35% of the effective volume of the zone, the settling and filtering zone packing plates account for 45-55% of the effective volume of the zone, and the distance from the bottom of the packing plates to the bottom of the clean manure pit is 30-40% of the effective volume of the clean manure pit.
Further, the aerobic zone and the precipitation filtration zone are separated by a first baffle, the bottom of the first baffle is connected with the bottom of the septic tank, and a first water passing pipeline is arranged on the first baffle.
Furthermore, a filler plate placing position for fixing the filler plate is arranged in the septic tank.
The embodiment of the second aspect of the invention provides an application of a clean manure pit, wherein the clean manure pit is the clean manure pit, the application is that the clean manure pit and a water-saving toilet stool form a clean manure pit toilet system, and the effluent of the system directly reaches the standard and is discharged.
The embodiment of the invention has the following beneficial effects:
the flow state of the septic tank is changed by adding the baffle plate, the activity of the sludge is increased, the anaerobic digestion effect is strengthened, the amount of residual sludge generated by anaerobic treatment is small, and the cleaning period can be prolonged; the filler is added into the anaerobic section and the aerobic section of the septic tank, which is beneficial to the attachment and growth of microorganisms and strengthens the removal of nutrient substances in the septic tank. The design is easy to construct and maintain, has low cost and is suitable for rural areas with distributed living.
Drawings
Fig. 1 is a schematic view of a septic tank in the embodiment of the invention.
FIG. 2 is a schematic diagram of a packing plate structure according to an embodiment of the present invention.
Detailed Description
The present application is further described below with reference to examples.
In the following description, different "one embodiment" or "an embodiment" may not necessarily refer to the same embodiment, in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art. Various embodiments may be replaced or combined, and other embodiments may be obtained according to the embodiments without creative efforts for those skilled in the art.
The water inlet of the existing integrated sewage treatment facility is mostly the water outlet of the septic tank, and the design invention provides that after the excrement sewage directly enters, the water outlet treated by the septic tank can reach the rural domestic sewage discharge standard.
The septic tank is a great improvement on the basis of the traditional three-format septic tank. The conventional septic tank is divided into 3 compartments, and the improved clean septic tank is divided into 5 compartments. The improved septic tank is added with filler, baffle plates and solar energy aeration, and the aerobic zone is added with sludge backflow. Are beneficial to the growth of microorganisms, thereby improving the water outlet effect of the excrement cleaning pool.
With reference to the attached drawing 1, the septic tank comprises a feces and sewage separation zone 1, anaerobic zones 2 and 3, an aerobic zone 4 and a precipitation and filtration zone 5 which are sequentially communicated, wherein the anaerobic zone comprises a baffle plate; a first water passing port is reserved between the baffle plate and the bottom of the septic tank; an overflow port is reserved between the baffle plate and the top of the septic tank, and a sludge reflux device is arranged between the aerobic zone and the sedimentation filtering zone.
It should be understood that the sludge returning device may be a sludge returning pump disposed on the first baffle plate to return the sludge around the first baffle plate, and the manner of the return is not limited.
The conventional septic tank is too slow in flow state, and in the long-term use process of the septic tank, the fluid stirs less sludge at the bottom of the septic tank, and the baffle plate is added in the anaerobic zone, so that the flowing path of the fluid is standardized, the disturbance of the fluid to the sludge at the bottom is enhanced, the short flow is prevented, and the growth of microorganisms is facilitated.
The invention strengthens the rural sewage treatment effect by the following modes:
1. baffle plate: the baffle plate mainly functions to increase the mass transfer efficiency and the contact area between the sewage and the microorganisms.
2. Filling: polyurethane sponge filler is added into the aerobic and anaerobic zones to provide a larger attachment area for microorganisms; zeolite and volcanic rock filler are added into the precipitation filtering area, so that the other indexes of the effluent reach the standard while the phosphorus removal is enhanced.
3. Anaerobic and aerobic treatment modes: through the organic cooperation of two different anaerobic and aerobic environmental conditions and different types of microbial floras, the biological organic fertilizer has the functions of removing organic matters, nitrogen and phosphorus.
4. Sludge backflow: because aeration in the aerobic tank can cause great disturbance to sludge, and the sludge in the aerobic tank can be greatly lost into the sedimentation filter tank, so that the treatment effect of the aerobic zone can be reduced.
The packing plate is at a certain distance from the bottom of the container, so that blockage can be well prevented.
Baffles may be added to the anaerobic zone at each 1/3 or 1/4 of the length of the anaerobic zone.
In some embodiments of the present invention, the volume ratio of the fecal sewage separating area 1, the anaerobic area, the aerobic area 4 and the precipitation filtering area 5 is: 2:1:1:3 or 2:2:1: 2.
The volume ratio of the excrement separation zone, the anaerobic zone, the aerobic zone and the precipitation filtration zone can be 2:1:1:3 or 2:2:1:2, according to technical specifications of rural three-grid type household toilet construction, the volume ratio of each grid of the traditional three-grid type septic tank is 2:1:3, and when the volume ratio of the clean septic tank is 2:1:1:3 or 2:2:1:3, the volume of the anaerobic zone is reserved or increased, so that the anaerobic digestion effect is enhanced.
In some embodiments of the invention, the number of baffles is 1, the baffles divide the anaerobic zone into a pre-anaerobic zone 2 and a deep anaerobic zone 3; the volume ratio of the manure separation zone 1, the pre-anaerobic zone 2, the deep anaerobic zone 3, the aerobic zone 4 and the precipitation filtration zone 5 is 2:1:1:1: 2.
In some embodiments of the invention, the number of baffles is greater than or equal to 2.
In some embodiments of the invention, the top of the septic tank is provided with a solar micro-aeration device 6 which is communicated with an aeration head 601 at the bottom of the aerobic zone.
Through the action of nitrobacteria, ammonia nitrogen in the sewage is degraded under the condition of sufficient oxygen content, and meanwhile, the COD value in the sewage is reduced to a lower level, so that the sewage is purified.
The aeration mode adopts micropore aeration, and the design can effectively avoid the blockage of the pipeline due to the sludge generated by treating the waste water, prolong the service life and improve the oxygen utilization rate. The aeration head is located the clean manure pit bottom, and the microorganism obtains oxygen more balanced in this kind of aerobic tank, and is more abundant.
In some embodiments of the present invention, each of the anaerobic zone, the aerobic zone 4 and the precipitation filtration zone 5 is provided with a filler plate 8, and the filler plate 8 is a hollow plate with openings 802 at the periphery (the hollow 801 is a filler filling zone); the filler plate is filled with filler; the fillers of the anaerobic zone and the aerobic zone 4 are polyurethane fillers; the filler of the precipitation filtering area 5 is zeolite and volcanic rock. The addition of the filler plates 8 facilitates the attachment and growth of microorganisms.
In some embodiments of the invention, the volume of the packing plates of the anaerobic zone and the aerobic zone is 20-35% of the effective volume of the zones, and in practical engineering, 20%, 30% and 35% can be adopted; the filler plate of the precipitation separation area accounts for 45-55% of the effective volume of the area, and 45%, 50% and 55% can be selected in practical engineering. The volume of the packing plate is not suitable to be too large, so that sludge can be deposited due to too large volume, and the effective volume is reduced. Too small to be beneficial to the growth of anaerobic bacteria such as the group of bacteroides fragilis, prevotella chromogenes and porphyromonas, ureaplasma urealyticum, fusobacterium nucleatum, gram negative anaerobic bacilli, gram negative anaerobic cocci, gram positive anaerobic cocci, clostridium perfringens, other comamoebae, gram positive anaerobic bacilli.
The distance between the bottom of the filler plate 8 and the bottom of the clean manure pit is 30-40% of the effective volume height of the clean manure pit; in actual engineering, 30%, 35% and 40% can be taken, the proportion of the distance between the filler plate and the bottom of the septic tank is not too large, and the septic tank is easily blocked due to too large distance; it is not suitable for too small an area to which too small microorganisms are attached, which is not conducive to the growth of obligate anaerobes, microaerophilic anaerobes, and facultative anaerobes.
The filler plates should be perforated with holes staggered all around, and the aperture should be smaller than the diameter of the filler.
The service life of different fillers is considered, and the specific surface area of each filler is different. Therefore, the combination of industrial filler and natural filler is selected as a bacterial carrier, insoluble organic matters in the sewage are converted into soluble organic matters by virtue of microorganisms, and macromolecular organic matters are hydrolyzed into micromolecular organic matters.
In some embodiments of the present invention, the aerobic zone 4 and the sedimentation filter zone 5 are separated by a first baffle 504, the bottom of the first baffle 504 is connected with the bottom of the clean manure tank, a gap is left between the top of the first baffle 504 and the top of the clean manure tank, and a water passing pipe is arranged on the first baffle 504.
The baffle is positioned according to the volume ratio of each grid,
in some embodiments of the invention, the clean manure pit is provided with a filler plate rest 7 for fixing the filler plate.
The top of the septic tank is provided with exhaust ports 101 and 501, the front end of the excrement separating area 1 is provided with a water inlet 102, and the tail end of the sedimentation filtering area 5 is provided with a water outlet 502.
The application of the clean manure pit is that the clean manure pit is formed, and the clean manure pit and the water-saving toilet stool form a clean manure pit toilet system. The problems of selection and proportion of the filler are optimized, and the solar aeration is beneficial to the growth of aerobic microorganisms. Baffle plates are added in the anaerobic zone to divide the anaerobic zone into a 2 nd grid and a 3 rd grid, so that the flow state of the anaerobic zone is optimized by adding the baffle plates, and the growth of microorganisms in the anaerobic zone is facilitated.
By adding the baffle plate in the anaerobic zone, the fluid state is optimized, the flow path of the fluid is increased, and the disturbance of the fluid to the sludge is strengthened; the filler is added, so that the attachment growth of microorganisms is facilitated, and the amount of microorganisms in the liquid and the sludge of the septic tank can be increased, so that the activity of the sludge is increased; the increase of aerobic aeration is beneficial to the growth of aerobic microorganisms and autotrophic bacteria (nitrifying bacteria) and the increase of the sludge activity in an aerobic zone.
In some embodiments, the inside of the septic tank is also provided with a filler plate rest 101.
It should be understood that the parts not described in the present application are all the components and parameters common in the field of septic tanks, such as a viewing port and a manure washing port at the top of the septic tank, the manure washing port is located above the anaerobic zone, a reserved port is further provided at the top of the septic tank, and the like, and the detailed description is omitted.
The equipment applied to the integrated treatment specifically comprises the following devices:
construction installation
Clean manure pit
The sites of the clean manure pits are uniformly arranged according to village construction planning, and the clean manure pits are leeward and exposed to the sun, have slightly higher terrain, firm soil and low underground water level.
The construction process flow of the glass fiber reinforced plastic septic tank comprises the following steps: positioning and paying-off → digging a foundation pit → processing a base cushion layer → placing equipment in place → flushing water in the pit → layered backfilling → building a connecting well and an inspection well → hardening the ground.
Paying-off and grooving pit
And excavating a base groove according to the model size, elevation and ash discharge line according to the model of the septic tank. Under the condition of higher underground water level, the pit groove is excavated to be drained.
Treating a base mat
When underground water or a soft base layer exists in a construction site of the glass fiber reinforced plastic septic tank, a C10 concrete cushion is poured firstly, and a sand cushion layer with the thickness of 100mm is paved. And after the basic cushion layer is treated, a sand cushion layer of 5 cm-10 cm is made on the cushion layer.
With the equipment in place
Check if the device is intact. The water inlet and outlet directions of the equipment are accurately found, the glass fiber reinforced plastic septic tank is hoisted into a foundation tank after foundation treatment by a crane, and after the equipment is in place, whether the equipment is installed correctly is checked.
Flushing in pool
And after the equipment is in place and meets the requirements, injecting water into the equipment. When water is injected, water with the height of 1/3 degrees is injected into the tank body, soil is enclosed under the glass fiber reinforced plastic septic tank to stabilize the glass fiber reinforced plastic septic tank, and then water is synchronously injected into the tank body according to the backfill height.
Layered backfill
And mounting, placing in place, injecting water, and then backfilling in time. The backfilling can be carried out according to the virtual paving thickness of each layer of 250mm, and the backfilling is preferably carried out by manual tamping without local violent impact or mechanical backfilling so as to prevent the tank body from being damaged.
Building connecting well and inspection well
When the backfill reaches a certain height, an inlet and an outlet connecting well and an inspection well are installed, and the bottoms of the connecting well and the inspection well are required to be made into concrete cushions.
Hardened ground
The covering soil of the glass fiber reinforced plastic septic tank is not less than 1.5m, and the hardening treatment is carried out.
Solar micro-aeration
The solar micro-aerator is installed by paying attention to the place where the solar panel is placed, glass cannot be separated, and shading plants, security windows or other solid shelters cannot be arranged on the left and the right; and opening the solar panel bracket, and keeping the solar panel and the horizontal plane to form an angle of 30-45 degrees and to be placed towards the south. The solar panel is forbidden to be hung or horizontally placed; regularly clear up the dirt on solar panel surface, guarantee the normal generating efficiency of solar panel.
It should be noted that, when the conditions allow, the mains supply is preferentially used to ensure the stable operation of the device
The cleaning cycle time is prolonged through the improved septic tank, and compared with the traditional septic tank, the minimum cleaning cycle time can be prolonged to 110-120 days, so that the effective volume of the clean septic tank can be utilized for a longer time; wherein the amount of microorganisms is increased by 20-30% compared with the traditional three-grid septic tank, wherein the improved environment is particularly beneficial to the growth of the lunar monmonas, the bacteroides fragilis, the clostridium perfringens and the clostridium histolyticum.
The invention integrates the functions of the three-grid septic tank and the improved AO technology, the traditional AO technology has overhigh operation cost and difficult later maintenance, and the improved AO technology has low operation cost and simple maintenance and is suitable for being used in distributed rural areas. The domestic sewage COD, ammonia nitrogen, total phosphorus and SS treated by the equipment are respectively reduced to 45mg/L, 4mg/L, 10mg/L, 0.5mg/L and 8mg/L, the rural domestic sewage discharge standard can be achieved, and the higher discharge requirement can be met by reducing the concentration of effluent pollutants by optimizing the partition volume ratio, adjusting the types of fillers and optimizing the operation parameters.
It should be noted that the above embodiments can be freely combined as necessary. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A septic tank is characterized in that the septic tank comprises a feces and sewage separation zone, an anaerobic zone, an aerobic zone and a precipitation filtering zone which are sequentially communicated, wherein the anaerobic zone comprises a baffle plate; a first water passing port is reserved between the baffle plate and the bottom of the septic tank; an overflow port is reserved between the baffle plate and the top of the septic tank, and a sludge reflux device is arranged between the aerobic zone and the sedimentation filtering zone.
2. The septic tank of claim 1, wherein the volume ratio of the manure separation zone, the anaerobic zone, the aerobic zone and the precipitation filtration zone is: 2:1:1:3 or 2:2:1: 2.
3. A septic tank as claimed in claim 2 wherein the number of baffles is 1, the baffles dividing the anaerobic zone into a pre-anaerobic zone and a deep anaerobic zone; the volume ratio of the manure separation zone, the pre-anaerobic zone, the deep anaerobic zone, the aerobic zone and the precipitation filtration zone is 2:1:1:1: 2.
4. The septic tank of claim 1, wherein the number of baffles is greater than or equal to 2.
5. The septic tank of claim 1, wherein the top of the septic tank is provided with a solar micro-aeration device which is communicated with an aeration head at the bottom of the aerobic zone.
6. The septic tank of claim 1, wherein a filler plate is arranged in each of the anaerobic zone, the aerobic zone and the sedimentation and filtration zone, and the filler plate is a hollow plate with openings at the periphery; the filler plate is filled with filler; the fillers of the anaerobic zone and the aerobic zone are polyurethane fillers; the filler of the precipitation filtering area is zeolite and volcanic rock.
7. The clean manure pit of claim 6, wherein the volume of the packing plates of the anaerobic zone and the aerobic zone is 20-35% of the effective volume of the area, the packing plates of the sedimentation and filtration zone account for 45-55% of the effective volume of the area, and the distance from the bottom of the packing plates to the bottom of the clean manure pit is 30-40% of the height of the effective volume of the clean manure pit.
8. The septic tank of claim 1, wherein the aerobic zone and the sedimentation and filtration zone are separated by a first baffle plate, the bottom of the first baffle plate is connected with the bottom of the septic tank, and a first water passing pipeline is arranged on the first baffle plate.
9. The septic tank of claim 1, wherein a filler plate rest for fixing the filler plate is arranged in the septic tank.
10. The application of the clean manure pit is characterized in that the clean manure pit is the clean manure pit as claimed in any one of claims 1 to 9, the clean manure pit and the water-saving toilet stool form a clean manure pit toilet system, and the effluent of the system is directly discharged after reaching the standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110340858.2A CN113387530A (en) | 2021-03-30 | 2021-03-30 | Septic tank and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110340858.2A CN113387530A (en) | 2021-03-30 | 2021-03-30 | Septic tank and application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113387530A true CN113387530A (en) | 2021-09-14 |
Family
ID=77617584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110340858.2A Pending CN113387530A (en) | 2021-03-30 | 2021-03-30 | Septic tank and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113387530A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000271583A (en) * | 1999-01-19 | 2000-10-03 | Inax Corp | Septic tank |
| WO2012062688A2 (en) * | 2010-11-08 | 2012-05-18 | Borda E. V. Bremen Overseas Research And Development Association | Modular system for anaerobic treatment of faecal sludges from residential wastewaters and method for the anaerobic treatment of faecal sludges from residential wastewaters |
| CN110316903A (en) * | 2019-04-25 | 2019-10-11 | 湖南艾布鲁环保科技股份有限公司 | A kind of livestock and poultry feces qualified discharge processing unit and implementation method |
| CN211813981U (en) * | 2019-11-21 | 2020-10-30 | 福建省融旗建设工程有限公司 | Septic tank adopting pretreatment and biological contact |
-
2021
- 2021-03-30 CN CN202110340858.2A patent/CN113387530A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000271583A (en) * | 1999-01-19 | 2000-10-03 | Inax Corp | Septic tank |
| WO2012062688A2 (en) * | 2010-11-08 | 2012-05-18 | Borda E. V. Bremen Overseas Research And Development Association | Modular system for anaerobic treatment of faecal sludges from residential wastewaters and method for the anaerobic treatment of faecal sludges from residential wastewaters |
| CN110316903A (en) * | 2019-04-25 | 2019-10-11 | 湖南艾布鲁环保科技股份有限公司 | A kind of livestock and poultry feces qualified discharge processing unit and implementation method |
| CN211813981U (en) * | 2019-11-21 | 2020-10-30 | 福建省融旗建设工程有限公司 | Septic tank adopting pretreatment and biological contact |
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Application publication date: 20210914 |
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