CN108529829B - Buried sewage treatment equipment and sewage treatment system - Google Patents
Buried sewage treatment equipment and sewage treatment system Download PDFInfo
- Publication number
- CN108529829B CN108529829B CN201810501996.2A CN201810501996A CN108529829B CN 108529829 B CN108529829 B CN 108529829B CN 201810501996 A CN201810501996 A CN 201810501996A CN 108529829 B CN108529829 B CN 108529829B
- Authority
- CN
- China
- Prior art keywords
- tank
- sewage treatment
- aerobic tank
- buried
- aerobic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000010865 sewage Substances 0.000 title claims abstract description 119
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 238000004062 sedimentation Methods 0.000 claims abstract description 41
- 239000000945 filler Substances 0.000 claims description 65
- 238000005192 partition Methods 0.000 claims description 35
- 238000005273 aeration Methods 0.000 claims description 29
- 238000011010 flushing procedure Methods 0.000 claims description 16
- 239000002893 slag Substances 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 6
- 238000005243 fluidization Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000004065 wastewater treatment Methods 0.000 claims 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 22
- 239000001301 oxygen Substances 0.000 description 22
- 229910052760 oxygen Inorganic materials 0.000 description 22
- 239000007789 gas Substances 0.000 description 15
- 239000010802 sludge Substances 0.000 description 14
- 244000005700 microbiome Species 0.000 description 11
- 238000012856 packing Methods 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 6
- 238000005276 aerator Methods 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- 238000004891 communication Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 6
- 229910052698 phosphorus Inorganic materials 0.000 description 6
- 239000011574 phosphorus Substances 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 239000002912 waste gas Substances 0.000 description 4
- 241001148470 aerobic bacillus Species 0.000 description 3
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 150000002829 nitrogen Chemical class 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000001546 nitrifying effect Effects 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 1
- CVTZKFWZDBJAHE-UHFFFAOYSA-N [N].N Chemical group [N].N CVTZKFWZDBJAHE-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000012258 culturing Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 241001148471 unidentified anaerobic bacterium Species 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- 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
- C02F3/30—Aerobic and anaerobic processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention discloses buried sewage treatment equipment, which comprises a closed shell, an anaerobic tank, a first aerobic tank, a second aerobic tank and a sedimentation tank which are sequentially communicated in the closed shell, and a return pipe connected between the second aerobic tank and the anaerobic tank; the closed shell is further provided with a water inlet and a water outlet which are respectively communicated with the anaerobic tank and the sedimentation tank. The invention also discloses a sewage treatment system comprising the buried sewage treatment device.
Description
Technical Field
The invention relates to the field of sewage treatment, in particular to buried sewage treatment equipment and a sewage treatment system.
Background
The scale of urban sewage treatment plants in China is quite large (daily treatment of 10 ten thousand tons and even millions of tons), the daily treatment scale of town sewage treatment plants in China is only hundreds of tons to thousands of tons, and the scale of village sewage treatment plants is only several tons to hundreds of tons. According to statistics, the sewage discharge amount of 19000 construction towns, 60 tens of thousands of administrative villages and 250 tens of thousands of natural villages (collectively called villages) in China is about 55% of the total domestic sewage discharge amount in China.
With the deep progress of new rural construction in China, the requirements of people in China on life quality are obviously improved along with the development of economic life, and the treatment of village and town domestic sewage is in need of being solved. Most villages and towns are complex in topography, the pipe network is difficult to lay, municipal sewage pipe networks are difficult to access, in addition, rural domestic sewage sources in China are scattered, centralized collection and treatment are difficult to carry out, and scattered or small sewage treatment facilities are needed to treat sewage nearby. The problem of long construction period and difficult construction coordination and land sign caused by regional limitation. Meanwhile, the existence of a large number of sewage treatment stations can cause the problem of air pollution.
Disclosure of Invention
Based on this, it is necessary to provide an underground sewage treatment apparatus and a sewage treatment system for solving the problem of sewage treatment in villages and towns.
The buried sewage treatment equipment comprises a closed shell, an anaerobic tank, a first aerobic tank, a second aerobic tank and a sedimentation tank which are sequentially communicated in the closed shell, and a return pipe connected between the second aerobic tank and the anaerobic tank; the closed shell is further provided with a water inlet and a water outlet which are respectively communicated with the anaerobic tank and the sedimentation tank.
In one embodiment, a first baffle, a second baffle and a third baffle are sequentially arranged in the closed shell at intervals along a first horizontal direction, so that the closed shell is divided into the anaerobic tank, the first aerobic tank, the second aerobic tank and the sedimentation tank; the anaerobic tank is communicated with the first aerobic tank at the top of the first partition board, the first aerobic tank is communicated with the second aerobic tank at the bottom of the second partition board, and the second aerobic tank is communicated with the sedimentation tank at the top of the third partition board, so that the anaerobic tank, the first aerobic tank, the second aerobic tank and the sedimentation tank are sequentially connected in series.
In one embodiment, the water inlet and the water outlet are respectively arranged on a first side wall and a second side wall of the closed shell, which are oppositely arranged along the first horizontal direction, wherein the water inlet is positioned at the lower part of the first side wall, and the water outlet is positioned at the upper part of the second side wall.
In one embodiment, the device further comprises an aeration device, wherein the aeration device comprises a first perforated aeration pipe and a second perforated aeration pipe which are respectively positioned at the bottom of the first aerobic tank and the bottom of the second aerobic tank.
In one embodiment, at least two layers of first grids are arranged in the anaerobic tank at intervals along the vertical direction, at least one first filling frame is formed by the two layers of first grids, the inner wall of the closed shell and the first partition board, and the first filling frame is filled with first biological filling materials.
In one embodiment, the first biological filler comprises a hollow reticular spherical shell and a first suspended porous biological filler filled in the hollow reticular spherical shell, the filling rate of the first suspended porous biological filler in the hollow reticular spherical shell is 80% -95%, and the filling rate of the first biological filler in the first filler frame is 55% -65%.
In one embodiment, the anaerobic tank further comprises a back flushing device, wherein the back flushing device comprises a perforated flushing pipe positioned at the bottom of the anaerobic tank.
In one embodiment, at least two layers of second grids are arranged in the first aerobic tank at intervals along the vertical direction, and the two layers of second grids, the inner wall of the closed shell, the first partition plate and the second partition plate jointly form at least one second filling frame, and the second suspended porous biological filling is freely filled in the second filling frame.
In one embodiment, the filling rate of the second suspended porous biological filler in the second filler frame is 55% -65%, and the second suspended porous biological filler can form fluidization under the aeration condition.
In one embodiment, a first baffle is arranged on the upper portion of the third baffle, a first overflow weir is formed on the upper portion of the first baffle and the upper portion of the third baffle, and a dosing port is formed on the top of the second aerobic tank at a position corresponding to the first overflow weir.
In one embodiment, the sedimentation tank comprises a flow guide pipe, the flow guide pipe is communicated with the first overflow port, and the extending direction of the flow guide pipe is directed to the bottom of the sedimentation tank from the first overflow port.
In one embodiment, a second baffle is arranged on the inner wall of the closed shell at the water outlet to form a second overflow weir, a slag baffle is arranged at the second overflow weir in a suspending manner, the slag baffle is arranged at the first horizontal direction and is overlapped with the second baffle at intervals, and two side ends of the slag baffle in the second horizontal direction perpendicular to the first horizontal direction are connected with the inner wall of the closed shell.
In one embodiment, a plurality of air-water balance holes are formed in the top of the closed shell, and the air-water balance holes are communicated with the atmosphere and used for keeping balance of air pressure and water pressure in the closed shell.
In one embodiment, the closed housing is provided with an access opening, and the buried sewage treatment apparatus further comprises an access cover, wherein the access opening is plugged by the access cover so that the space between the inside and the outside of the closed housing is closed.
In one embodiment, the access opening includes first, second, third and fourth access openings corresponding to the anaerobic tank, the first aerobic tank, the second aerobic tank and the sedimentation tank, respectively, and the access cover includes first, second, third and fourth access covers corresponding to the first, second, third and fourth access openings, respectively.
A sewage treatment system comprises the buried sewage treatment equipment.
In one embodiment, the device further comprises an overhaul through pipe, wherein the buried sewage treatment device is buried underground, and the overhaul through pipe is used for communicating the overhaul port of the buried sewage treatment device with the ground.
In one embodiment, the system further comprises an intelligent monitoring system, wherein the intelligent monitoring system is used for transmitting information of the underground sewage treatment equipment to a terminal and controlling operation of the underground sewage treatment equipment according to a command of the terminal.
The buried sewage treatment equipment realizes anaerobic treatment, aerobic treatment and sedimentation treatment of sewage in a whole set of device, and meanwhile, the closed buried sewage treatment equipment can be buried underground, so that the environmental pollution is reduced, the occupied area is reduced, the device is suitable for decentralized sewage treatment, the buried sewage treatment equipment is in a closed state, waste gas generated by microorganisms in water can be degraded, the generation of peculiar smell is reduced, and the problems of high investment cost and high operation and management difficulty caused by independently configuring the waste gas treatment device are avoided. In addition, through setting up two good oxygen ponds, and will the back flow setting is in between the good oxygen pond of second with the anaerobism pond, through the treatment of the good oxygen pond of second grade in first good oxygen pond, the good oxygen pond, can fully convert the ammonia nitrogen in the sewage into inorganic nitrogen salt, the nitrate nitrogen in the good oxygen pond of second flows back to the anaerobism pond and carries out denitrification reaction and further forms nitrogen gas emission, can realize the thorough clear away of sewage total nitrogen through the good oxygen of multiple circulation and anaerobism treatment.
Drawings
FIG. 1 is a plan view of an underground sewage treatment apparatus according to an embodiment of the present invention;
FIG. 2 is a front view of an underground sewage treatment apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic view of an access cover according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view of an underground sewage treatment apparatus according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view of a second aerobic tank according to an embodiment of the present invention;
fig. 6 is a schematic structural view of an inspection tube according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following examples are given to illustrate the buried sewage treatment apparatus and the sewage treatment system of the present invention in further detail by way of example with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only. The various objects in the drawings of the embodiments are drawn to scale for ease of illustration and not to scale for actual components.
Referring to fig. 1 to 3, an embodiment of the present invention provides an underground sewage treatment apparatus, which includes a closed casing 10, an anaerobic tank 100, a first aerobic tank 210, a second aerobic tank 220, and a sedimentation tank 300, which are sequentially communicated in the closed casing 10, and a return pipe 450 connected between the second aerobic tank 220 and the anaerobic tank 100.
The buried sewage treatment equipment realizes anaerobic treatment, aerobic treatment and sedimentation treatment of sewage in a whole set of device. Meanwhile, the closed buried sewage treatment equipment can be buried underground, so that the environmental pollution is reduced, the occupied area is reduced, and the sewage treatment equipment is suitable for decentralized sewage treatment. Under the closed state, the buried sewage treatment equipment can degrade the generated waste gas through microorganisms in water, reduce the generation of peculiar smell and avoid the problems of high investment cost and high operation and management difficulty caused by independently configuring the waste gas treatment device.
The closed shell 10 is also provided with a water inlet 102 and a water outlet 302, the water inlet 102 is used for introducing sewage to be treated into the closed shell 10, and the water outlet 302 is used for discharging clean water after treatment. The water inlet 102 may be in communication with the anaerobic tank 100 and the water outlet 302 may be in communication with the sedimentation tank 300. The water inlet 102 and the water outlet 302 may be respectively disposed on a first sidewall and a second sidewall of the closed casing 10 disposed opposite to each other along a first horizontal direction. In an embodiment, the water inlet 102 is formed at the lower portion of the first side wall, the water outlet 302 is formed at the upper portion of the second side wall, and the water inlet 102 may be in communication with a village sewage pipe network buried underground, so that sewage is naturally introduced into the closed casing 10 without using pressure pump or other pressure equipment. Sewage enters the buried sewage treatment equipment through the water inlet 102, nitrate nitrogen is converted into nitrogen through denitrification reaction of the anaerobic tank 100 and is discharged, ammonia nitrogen forms inorganic nitrogen salt through nitrification reaction of the first aerobic tank 210 and the second aerobic tank 220, sludge or particulate matters in the sewage are precipitated through the sedimentation tank 300, and supernatant fluid is discharged through the water outlet 302. Through setting up two good oxygen ponds, and will the back flow 450 sets up between second good oxygen pond 220 with the anaerobism pond 100, through the treatment of the second good oxygen pond 200 of first good oxygen pond 210, second good oxygen pond 220, the ammonia nitrogen in the sewage fully turns into inorganic nitrogen salt, the nitrate nitrogen of second good oxygen pond 220 flows back to anaerobism pond 100 and carries out denitrification reaction and further forms nitrogen gas emission, can realize the thorough clear of sewage total nitrogen through the good oxygen of multiple circulation and anaerobic treatment. The return pipe 450 may be provided outside the closed housing 10 to separate the flow of return sewage from the flow of sewage inside the sealed housing.
In one embodiment, a first partition 410, a second partition 420 and a third partition 430 are sequentially disposed in the enclosure 10 at intervals along a first horizontal direction, so as to partition the enclosure 10 into the oxygen pressing tank 100, the first aerobic tank 210, the second aerobic tank 220 and the sedimentation tank 300, which are sequentially communicated. Further, the first anaerobic tank 100 and the first aerobic tank 210 are communicated at the top of the first partition 410, the first aerobic tank 210 and the second aerobic tank 220 are communicated at the bottom of the second partition 420, and the second aerobic tank 220 is communicated with the sedimentation tank 300 at the top of the third partition 430, so that the oxygen pressing tank 100, the first aerobic tank 210, the second aerobic tank 220 and the sedimentation tank 300 are sequentially connected in series. In an embodiment, water holes may be formed at the bottom of the second partition 420, and overflow ports may be formed at the top of the first partition 410 and the third partition 430, so that the anaerobic tank 100, the first aerobic tank 210, the second aerobic tank 220, and the sedimentation tank 300 are sequentially connected in series. When sewage enters the anaerobic tank from the water inlet 102, the sewage can flow forward in the buried sewage treatment equipment in a top-bottom-up baffling mode, so that the sewage can be fully contacted with microorganisms in biological fillers; in addition, the sealed housing 10 is divided into a plurality of reaction tanks by the partition plates, so that the structure of the sewage treatment equipment is more compact, the structure of the buried sewage treatment equipment can be further simplified, and the miniaturization of the buried sewage treatment equipment is facilitated.
Referring to fig. 4, in one embodiment, at least two first gratings 481 are disposed in the anaerobic tank 100 at intervals along the vertical direction, and the two first gratings 481, the inner wall of the closed housing 10, and the first partition 410 together form at least one first packing frame, and the first packing frame is filled with the first biological packing 104. Preferably, the first biologic filler 104 comprises a plurality of hollow reticulated spherical shells, and a first suspended porous biologic filler encased within the hollow reticulated spherical shells. The first suspended porous biological filler may have a filling rate of 80% to 95% in the hollow reticulated spherical shell. The first biological filler 104 may have a filling rate within the first filler frame of 55% to 65%. The first biological filler 104 is distributed at each position of the first filler frame, so that dead zones are avoided. The first stuffing box is divided into a plurality of independent subspaces by the plurality of hollow reticular spherical shells, so that the first suspended porous biological stuffing in the first stuffing box cannot be agglomerated, and the full contact between the stuffing and sewage is ensured. In addition, the first biological filler 104 is provided with a structure that the plurality of hollow netlike spherical shells wrap the first suspended porous biological filler, and a supporting layer is not required to be separately provided, so that the structure can be simplified; because the pores are arranged between the hollow reticular spherical shells, gaps are also formed between the first suspended porous biological fillers, suspended matters in sewage can not block the filler area, a water distribution system, a backwashing water pump and the like required in the traditional anaerobic tank are not required, the structure is further simplified, and the miniaturization of sewage treatment equipment is facilitated.
In one embodiment, the anaerobic tank 100 includes a back flushing gas assembly 101, and the back flushing gas assembly 101 can back flush the first biological filler 104 in the anaerobic tank 100, and because the first biological filler 104 in the anaerobic tank is not easy to be blocked, the back flushing can be realized only by the back flushing gas assembly with a simpler structure without back flushing with water. Preferably, the back flushing gas assembly 101 comprises a back flushing gas circulation pipe 101a and a perforated flushing pipe 101b which are connected, wherein the back flushing gas circulation pipe 101a is used for introducing gas in connection with an air inlet pipe outside the equipment, and the perforated flushing pipe 101b is arranged at the bottom of the anaerobic tank 100 and used for providing upward back flushing gas. In addition, when the organic matter in the water is high, the valve of the recoil gas assembly 101 of the anaerobic tank 100 is opened, and the anaerobic tank 100 can be used as a temporary aerobic area for culturing aerobic microorganisms, increasing oxygenation and removing the organic matter.
In an embodiment, at least two layers of second gratings 482 are disposed in the first aerobic tank 210 at intervals along the vertical direction, and the two layers of second gratings 482, the inner wall of the closed casing 10, the first partition 410, and the second partition 420 together form at least one second packing frame, and the second suspended porous biological packing 214 is freely packed in the second packing frame. The second suspended porous biological filler 214 in the second filler frame can form fluidization under the aeration condition to form efficient mass transfer of gas-liquid phase and three-phase in the pores, so that the degradation speed of pollutants in wastewater is high, the COD removal efficiency is high, in addition, the growth and propagation of microorganisms (such as nitrifying bacteria) with slow proliferation speed are facilitated, the impact resistance is high, the treatment efficiency is high, the operation is stable, and the sludge production amount is small. Meanwhile, the second filler frame can limit the second suspended porous biological filler 214 in a certain space area, so that the second suspended porous biological filler is prevented from losing, and remains active and is recycled. Preferably, the filling rate of the second suspended porous biological filler 214 in the second filler frame is 55% -65%. The grid can suspend the biological carrier filler, prevent the second suspended porous biological filler 214 from settling to the bottom of the tank, and increase the contact between the second suspended porous biological filler 214 and sewage. The aerobic tank is in an aeration environment, and aeration air flow at the bottom can disperse the second suspended porous biological filler 214 in the second filler frame, so that the contact area of the second suspended porous biological filler 214 and sewage is prevented from being influenced by agglomeration. In an embodiment, at least two layers of third grids 483 are disposed in the second aerobic tank 220 at intervals along the vertical direction, and the two layers of third grids 483, the inner wall of the closed casing 10, the second partition 420 and the third partition 430 together form at least one third packing frame, and the third suspended porous biological packing 224 is freely packed in the third packing frame. In an embodiment, the third suspended porous biological filler 224 may be filled in the third filler frame in the same manner as the second suspended porous biological filler 214 is filled in the second filler frame, and will not be described herein.
In an embodiment, the first suspended porous biological filler, the second suspended porous biological filler 214, and the third suspended porous biological filler 224 may be the same or different.
In one embodiment, the first bio-filler 104, the second suspended porous bio-filler 214 and the third suspended porous bio-filler 224 are suspended bio-carrier fillers, and have the advantages of large specific surface area, uniform contact, high mass transfer speed and low head loss. Microorganisms in an attached state on the surface of the suspended biological carrier filler are in an aerobic state, mainly play roles in removing organic matters and converting ammonia nitrogen into nitrate nitrogen and nitrite nitrogen, and microorganisms growing inside holes of the suspended biological carrier filler are limited by oxygen transfer to form an intermediate facultative zone and an internal anaerobic zone, so that the growth of facultative denitrifying bacteria is facilitated to play a role in denitrification. Preferably, the openings of the suspended biological carrier filler can be macropores, mesopores and micropores respectively, the macropores can have good contact conditions and anti-blocking capability, and the mesopores and the micropores can be used for fixing microbial preparations and biological enzymes so as to increase the density of microorganisms. The average residence time of biosolids of microorganisms in long generation period grown in the suspended biological carrier filler is separated from the hydraulic residence time, so that the nitrifying bacteria and the nitrosate bacteria in long generation period can be propagated. Because macropores, mesopores and micropores exist in the filler and are limited by oxygen transfer, the biological carrier filler can maintain the quantity and diversity of microorganisms for a long time, and aerobic bacteria, anoxic bacteria and anaerobic bacteria exist simultaneously, so that the broad spectrum of removing organic matters is improved. In one embodiment, the specific surface area of the suspended biological carrier filler may be 100m 2 /g(35×104m 2 /m 3 ). Compared with the conventional biological filler, the biological filler can increase the biomass by 10-20 times, the degradation speed of sewage is increased, the residence time of the sewage is shortened, and the equipment capacity is reducedAnd (3) accumulation.
The invention separates the closed shell 10 into the independent anaerobic tank 100, the first aerobic tank 210, the second aerobic tank 220 and the sedimentation tank 300 by installing the baffle plates, so that anaerobic treatment, aerobic treatment and sedimentation treatment are carried out in a whole set of device, and the structure of sewage treatment equipment is simplified. The biological stuffing is limited in the fixed area range by the installation grille. Therefore, when equipment is assembled, equipment preparation and implementation can be realized in different places through the cooperation of the detachable partition plate, the grille and the biological filler, and the construction and construction process is simplified.
The buried sewage treatment equipment further comprises an aeration device. In one embodiment, the aeration device includes a first aerator pipe assembly 211 and a second aerator pipe assembly 221 respectively disposed in a first aerobic tank 210 and a second aerobic tank 220, and the first aerator pipe assembly 211 and the second aerator pipe assembly 221 may be disposed in the first aerobic tank 210 and the second aerobic tank 220, respectively. Preferably, the first aeration pipe assembly 211 comprises a first gas flow pipe 211a and a first perforated aeration pipe 211b which are connected, the second aeration pipe assembly 221 comprises a second gas flow pipe 221a and a second perforated aeration pipe 221b which are connected, the first gas flow pipe 211a and the second gas flow pipe 221a are respectively used for introducing gas in connection with an air inlet pipe outside the closed shell 10, and the first perforated aeration pipe 211b and the second perforated aeration pipe 221b are respectively arranged at the bottoms of the first aerobic tank 210 and the second aerobic tank 220 for aeration. The two-section structure of the gas circulation pipe and the perforated aeration pipe can ensure that the sewage circulation process does not block the pipeline and realize bottom aeration.
Since the first perforated aeration pipe 211b is provided at the bottom of the first aerobic tank 210 while the communication between the anaerobic tank 100 and the aerobic tank 200 is provided at the top of the first partition 410, the effect of the aeration of the first aerobic tank 210 on the anaerobic treatment of the anaerobic tank 100 can be reduced; the second perforated aeration pipe 221b is disposed at the bottom of the second aerobic tank 220, while the first aerobic tank 210 is disposed at the bottom of the second partition 420, so that the concentration density of aerobic bacteria at the bottom of the tank is relatively high, and it can be ensured that sewage can be efficiently treated by the aerobic bacteria when entering the second aerobic tank 220 from the first aerobic tank 210, thereby further improving the treatment effect of organic matters. The positions of the first perforated aeration pipe 211b and the second perforated aeration pipe 221b, the positions of the anaerobic tank 100, the first aerobic tank 210 and the second aerobic tank 220, and the two-stage aerobic treatment of the first aerobic tank 210 and the second aerobic tank 220 are matched with each other, so that the efficiency of the anaerobic treatment and the aerobic treatment is improved together.
Preferably, the first aerobic tank 210 and the second aerobic tank 220 may be connected to a dissolved oxygen monitor, by which dissolved oxygen in the first aerobic tank 210 and the second aerobic tank 220 is monitored in real time, and when the amount of oxygen detected by the dissolved oxygen monitor meets the use requirement, the first aerator pipe assembly 211 and the second aerator pipe assembly 221 may be controlled to intermittently aerate, for example, to intermittently operate a blower. Intermittent aeration can save running cost.
In an embodiment, the enclosure 10 further includes a first emptying port 103 formed at the bottom of the anaerobic tank 100, a second emptying port 203 formed between the bottoms of the first aerobic tank 210 and the second aerobic tank 220, and a third emptying port 303 formed at the bottom of the sedimentation tank 300, where when equipment maintenance and emptying are required or periodic sludge discharge is required, the emptying ports can be opened to discharge from the bottom, and in general, the sewage treatment apparatus of the present application hardly generates residual sludge in the sewage treatment process, and only needs to be maintained once for 6-12 months. The first aerobic tank 210 and the second aerobic tank 220 are communicated at the bottom, and sewage in the first aerobic tank 210 and the second aerobic tank 220 can be discharged from the second emptying port 203.
Referring to fig. 5, in an embodiment, a plurality of air-water balance holes 440 are further formed at the top of the closed casing 10, and the air-water balance holes 440 are in communication with the atmosphere for maintaining the balance of the air pressure and the water pressure in the closed casing 10, so that the sewage forms a stable self-flowing in the closed casing 10. The air-water balance holes 440 are in an open state, and the plurality of air-water balance holes 440 may be respectively formed at the top of each independent tank body.
In one embodiment, the third partition 430 has a first overflow port 222 near the top, and the second aerobic tank 220 and the sedimentation tank 300 are connected through the first overflow port 222. The upper portion of the third partition 430 is provided with a first baffle (e.g., an L-shaped baffle), the first baffle and the upper portion of the third partition 430 form a first overflow weir 223, and a dosing port 224 is provided at a position of the top of the second aerobic tank 220 corresponding to the first overflow weir 223. The upper portion of the third partition 430 is an upper portion having the first overflow port 222. A dosing tube 225 may be further provided in the dosing port 224, the dosing tube 225 passing through the dosing port 224 and being inserted into the first overflow weir 223. When total phosphorus of the inflow water is higher and biological phosphorus removal is difficult to treat and reaches the standard, a phosphorus removal agent can be added into the sedimentation tank 300 through the agent adding pipe 225, the phosphorus removal agent enters the first overflow weir 223 through the agent adding pipe 225, sewage and the agent are uniformly mixed through hydraulic stirring and then enter the sedimentation tank 300, and the purpose of phosphorus removal is achieved.
In one embodiment, the sedimentation tank 300 further includes a flow guiding pipe 304, the flow guiding pipe 304 is in communication with the first overflow port 222, and the extending direction of the flow guiding pipe 304 is directed from the first overflow port 222 to the bottom of the sedimentation tank 300. After the agent is added, sludge exists in the sewage, mud-water separation can be achieved through the diversion pipe 304, and the sludge is guided to settle to the bottom of the sedimentation tank 300.
In an embodiment, the bottom of the sedimentation tank 300 is provided with a sludge collecting pipe 305, the sludge collecting pipe 305 may be a perforated sludge collecting pipe 305, the sludge collecting pipe 305 is communicated with the emptying port of the sedimentation tank 300, and the perforated sludge collecting pipe 305 may utilize the water pressure in the tank to discharge the sludge. When the buried sewage treatment equipment is used for sewage treatment, the sludge yield is low, and sludge can be discharged once in 12-24 months.
In one embodiment, a second baffle (e.g., an L-shaped baffle) may be provided on the inner wall of the enclosure 10 at the water outlet 302 to form a second weir 307. A slag blocking plate 306 may be suspended at the second overflow weir 307, the slag blocking plate 306 may be spaced from and overlapped with the second baffle in the first horizontal direction, and two ends of the slag blocking plate 306 in the second horizontal direction perpendicular to the first horizontal direction are connected with the inner wall of the closed casing 10. The clear water can be intercepted by the slag trap 306 before flowing into the second overflow weir 307 if the water contains scum.
In an embodiment, the buried sewage treatment apparatus includes an access cover, and the surface of the closed casing 10 is provided with an access opening, and the access cover seals the access opening so that the space between the inside and the outside of the closed casing 10 is closed. In one embodiment, the access ports include first, second, third and fourth access ports 461, 462, 463 and 464 corresponding to the anaerobic tank 100, the first, second and third aerobic tanks 210, 220 and 300, respectively, and the access cover 470 includes first, second, third and fourth access covers 470, 470 and 470 corresponding to the first, second, third and fourth access ports 461, 462, 463 and 464, respectively. The separately provided access covers 470 facilitate monitoring and maintenance of the anaerobic tank 100, the first aerobic tank 210, the second aerobic tank 220, and the sedimentation tank 300, respectively. Preferably, the first access cover 470, the second access cover 470, the third access cover 470 and the fourth access cover 470 are respectively flange-coupled with the anaerobic tank 100, the first aerobic tank 210, the second aerobic tank 220 and the sedimentation tank 300. The flange connection is convenient to detach.
The embodiment of the invention also provides a sewage treatment system which comprises the buried sewage treatment equipment.
Referring to fig. 6, in one embodiment, the sewage treatment system further includes a service pipe 500, the buried sewage treatment apparatus is buried in the ground, and the service pipe 500 communicates the service port of the buried sewage treatment apparatus with the ground. Preferably, the service pipe 500 includes independent service pipes 500 corresponding to the anaerobic tank 100, the first aerobic tank 210, the second aerobic tank 220, and the settling tank 300. In an embodiment, the first access hole 461, the second access hole 462, the third access hole 463 and the fourth access hole 464 correspond to the first access pipe 500, the second access pipe 500, the third access pipe 500 and the fourth access pipe 500, respectively, and the anaerobic tank 100, the first aerobic tank 210, the second aerobic tank 220 and the sedimentation tank 300 can be serviced by the first access pipe 500, the second access pipe 500, the third access pipe 500 and the fourth access pipe 500.
In one embodiment, the sewage treatment system further comprises an intelligent monitoring system, wherein the intelligent monitoring system is used for transmitting information of the underground sewage treatment equipment to a terminal and controlling operation of the underground sewage treatment equipment according to a command of the terminal. The unattended and remote monitoring of the buried sewage treatment equipment is realized, such as real-time detection of sewage discharge flow, remote control of pump on-off and the like. The intelligent monitoring system can provide reliable technical data for management and operation of the buried sewage treatment equipment, and reduces cost.
In an embodiment, the intelligent monitoring system comprises a data acquisition system, a data transmission system and a supervision terminal system.
The data acquisition system can be arranged at the field end of the buried sewage treatment equipment, the information acquisition system can comprise a Programmable Logic Controller (PLC), the PLC can be connected with the buried sewage treatment equipment, and the data information of the buried sewage treatment equipment is acquired through the PLC.
The data transmission system may include a general packet radio service module (GPRS), and allocating a fixed IP address to the GPRS module enables data collected by the PLC to be transmitted to the supervisory terminal. And the data security is good through the fixed IP address transmission. Preferably, the data transmission system may include a firewall through which access addresses are filtered and masked.
The supervisory terminal system may include listening software and management software, the listening software may be configured to receive data signals transmitted by the GPRS module remotely, including instantaneous traffic, accumulated traffic, parameters of an analysis meter, and the like. The monitoring software can store the obtained data into a database for the management software to use. Preferably, the monitoring software can issue a command, and the command is transmitted to the buried sewage treatment equipment through the data transmission system to control the buried sewage treatment equipment to execute the command, so that dynamic bidirectional management is realized.
Preferably, the sewage treatment system may further comprise an artificial wetland system, the artificial wetland system may be communicated with the water outlet of the buried sewage treatment device, and the synergistic effect of the microorganisms, the substrate and the plants in the artificial wetland system can realize the deep removal of organic matters, phosphorus and suspended matters in the sewage treated by the buried sewage treatment device.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (14)
1. The buried sewage treatment equipment is characterized by comprising a closed shell, an anaerobic tank, a first aerobic tank, a second aerobic tank and a sedimentation tank which are sequentially communicated in the closed shell, and a return pipe connected between the second aerobic tank and the anaerobic tank; wherein, the closed shell is also provided with a water inlet and a water outlet which are respectively communicated with the anaerobic tank and the sedimentation tank;
a first baffle, a second baffle and a third baffle are sequentially arranged in the closed shell at intervals along the first horizontal direction so as to divide the closed shell into the anaerobic tank, the first aerobic tank, the second aerobic tank and the sedimentation tank; the anaerobic tank is communicated with the first aerobic tank at the top of the first partition board, the first aerobic tank is communicated with the second aerobic tank at the bottom of the second partition board, and the second aerobic tank is communicated with the sedimentation tank at the top of the third partition board, so that the anaerobic tank, the first aerobic tank, the second aerobic tank and the sedimentation tank are sequentially connected in series;
at least two layers of first grids are arranged in the anaerobic tank at intervals along the vertical direction, at least one first filling frame is formed by the two layers of first grids, the inner wall of the closed shell and the first partition board, and first biological filling materials are filled in the first filling frame;
the first biological filler comprises a hollow reticular spherical shell and a first suspended porous biological filler filled in the hollow reticular spherical shell, the filling rate of the first suspended porous biological filler in the hollow reticular spherical shell is 80-95%, and the filling rate of the first biological filler in the first filler frame is 55-65%;
the device comprises a perforated gas flushing pipe positioned at the bottom of the anaerobic tank, and the device can perform gas back flushing on a first biological filler in the anaerobic tank, oxygenate the anaerobic tank and convert the anaerobic tank into an aerobic tank.
2. The apparatus according to claim 1, wherein the water inlet and the water outlet are provided on a first side wall and a second side wall of the closed housing which are disposed opposite to each other in the first horizontal direction, respectively, wherein the water inlet is located at a lower portion of the first side wall, and the water outlet is located at an upper portion of the second side wall.
3. The buried sewage treatment apparatus according to claim 2, further comprising an aeration device including a first perforated aeration pipe and a second perforated aeration pipe at the bottom of the first aerobic tank and the bottom of the second aerobic tank, respectively.
4. The underground sewage treatment device according to claim 1, wherein at least two layers of second grids are arranged in the first aerobic tank at intervals along the vertical direction, the two layers of second grids, the inner wall of the closed shell, the first partition plate and the second partition plate form at least one second filling frame together, and the second suspended porous biological filling is freely filled in the second filling frame.
5. The buried sewage treatment apparatus of claim 4, wherein the second suspended porous biological filler has a filling rate of 55% to 65% in the second filler frame, and the second suspended porous biological filler is capable of forming fluidization under aeration conditions.
6. The underground sewage treatment device according to claim 1, wherein a first baffle is arranged on the upper portion of the third baffle, a first overflow weir is formed on the upper portions of the first baffle and the third baffle, and a dosing port is formed on the top of the second aerobic tank at a position corresponding to the first overflow weir.
7. The apparatus according to claim 6, wherein the sedimentation tank comprises a draft tube, the draft tube is communicated with the first overflow port, and an extending direction of the draft tube is directed from the first overflow port to a bottom of the sedimentation tank.
8. The underground sewage treatment device according to claim 2, wherein a second baffle plate is arranged on the inner wall of the closed shell at the water outlet to form a second overflow weir, a slag blocking plate is arranged at the second overflow weir in a suspended manner, the slag blocking plate is arranged at intervals overlapping with the second baffle plate in the first horizontal direction, and two side ends of the slag blocking plate in the second horizontal direction perpendicular to the first horizontal direction are connected with the inner wall of the closed shell.
9. The apparatus according to claim 1, wherein a plurality of air-water balance holes are provided at the top of the closed housing, and the air-water balance holes are communicated with the atmosphere for maintaining the balance of the air pressure and the water pressure in the closed housing.
10. The buried sewage treatment apparatus of claim 1, wherein the closed housing is provided with an access opening, the buried sewage treatment apparatus further comprising an access cover that seals the access opening so as to seal between the inside and the outside of the closed housing.
11. The buried sewage treatment apparatus of claim 10, wherein the access opening comprises first, second, third and fourth access openings corresponding to the anaerobic tank, the first aerobic tank, the second aerobic tank and the sedimentation tank, respectively, and the access cover comprises first, second, third and fourth access covers corresponding to the first, second, third and fourth access openings, respectively.
12. A sewage treatment system comprising the buried sewage treatment apparatus according to any one of claims 1 to 11.
13. The wastewater treatment system of claim 12, further comprising a service pipe, the buried wastewater treatment apparatus being buried underground, the service pipe communicating the service port of the buried wastewater treatment apparatus with the ground.
14. The wastewater treatment system of claim 12, further comprising an intelligent monitoring system for transmitting information of the buried wastewater treatment plant to a terminal and controlling operation of the buried wastewater treatment plant according to a command of the terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810501996.2A CN108529829B (en) | 2018-05-23 | 2018-05-23 | Buried sewage treatment equipment and sewage treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810501996.2A CN108529829B (en) | 2018-05-23 | 2018-05-23 | Buried sewage treatment equipment and sewage treatment system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108529829A CN108529829A (en) | 2018-09-14 |
| CN108529829B true CN108529829B (en) | 2024-03-29 |
Family
ID=63472614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810501996.2A Active CN108529829B (en) | 2018-05-23 | 2018-05-23 | Buried sewage treatment equipment and sewage treatment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108529829B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005028266A (en) * | 2003-07-10 | 2005-02-03 | Maezawa Ind Inc | Sewage treatment method and sewage treatment equipment |
| CN204644075U (en) * | 2015-05-14 | 2015-09-16 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of resettlement of affected residents town domestic sewage treatment system |
| CN204675952U (en) * | 2015-03-26 | 2015-09-30 | 杭州晟宇环保科技有限公司 | The buried sewage treatment equipment that a kind of low noise sound pitch is integrated |
| CN205170620U (en) * | 2015-11-26 | 2016-04-20 | 北京城市排水集团有限责任公司 | Bury formula biomembrane AO technology sewage treatment groove |
| CN205222959U (en) * | 2015-12-18 | 2016-05-11 | 桑德集团有限公司 | Integrated sewage treatment equipment |
| CN205295067U (en) * | 2015-11-16 | 2016-06-08 | 济南龙派节能环保工程有限公司 | Bury formula integrative sewage treatment device |
| CN208617643U (en) * | 2018-05-23 | 2019-03-19 | 北京华明广远环境科技有限公司 | Buried sewage treatment equipment and sewage disposal system |
-
2018
- 2018-05-23 CN CN201810501996.2A patent/CN108529829B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005028266A (en) * | 2003-07-10 | 2005-02-03 | Maezawa Ind Inc | Sewage treatment method and sewage treatment equipment |
| CN204675952U (en) * | 2015-03-26 | 2015-09-30 | 杭州晟宇环保科技有限公司 | The buried sewage treatment equipment that a kind of low noise sound pitch is integrated |
| CN204644075U (en) * | 2015-05-14 | 2015-09-16 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of resettlement of affected residents town domestic sewage treatment system |
| CN205295067U (en) * | 2015-11-16 | 2016-06-08 | 济南龙派节能环保工程有限公司 | Bury formula integrative sewage treatment device |
| CN205170620U (en) * | 2015-11-26 | 2016-04-20 | 北京城市排水集团有限责任公司 | Bury formula biomembrane AO technology sewage treatment groove |
| CN205222959U (en) * | 2015-12-18 | 2016-05-11 | 桑德集团有限公司 | Integrated sewage treatment equipment |
| CN208617643U (en) * | 2018-05-23 | 2019-03-19 | 北京华明广远环境科技有限公司 | Buried sewage treatment equipment and sewage disposal system |
Non-Patent Citations (2)
| Title |
|---|
| 聂梅生.水工业工程设计手册 水工业工程设备.中国建筑工业出版社,2000,第1051页. * |
| 郑兴灿，李亚新.污水除磷脱氮技术.中国建筑工业出版社,1998,第285页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108529829A (en) | 2018-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204824550U (en) | A device for rural domestic sewage treatment | |
| CN103708617B (en) | Assembled stereoscopic A2/O reaction tank for rural dispersible sewage treatment | |
| CN105084650A (en) | Microaeration circulation integrated sewage biological ecological processing system and method | |
| CN109879546A (en) | A kind of dispersant type domestic wastewater processing system and treatment process | |
| CN109502917A (en) | A kind of residents underground powerless integration compound bio sewage-treatment plant and technique | |
| CN111960534A (en) | ECR sewage treatment device | |
| CN108529829B (en) | Buried sewage treatment equipment and sewage treatment system | |
| CN208617643U (en) | Buried sewage treatment equipment and sewage disposal system | |
| CN211141827U (en) | Small-size self-loopa sewage treatment device | |
| CN212476449U (en) | Integrated domestic sewage treatment equipment aiming at infiltration culture and industrial wastewater | |
| CN205133239U (en) | Synchronous AO biofilm reactor of nido | |
| CN214142004U (en) | Treatment system of decentralized sewage | |
| CN212504215U (en) | Sewage treatment purifier | |
| CN211712878U (en) | Sewage treatment equipment | |
| CN211338961U (en) | Sewage treatment device adopting down-flow type anaerobic biological filter combined process | |
| CN209522733U (en) | A kind of residents underground powerless integration compound bio sewage-treatment plant | |
| CN209890440U (en) | Can bury formula integration sewage purification device | |
| CN210065324U (en) | Water dispersing equipment | |
| CN210795922U (en) | Vertical flow type A2O-MBBR gas stripping inner loop sewage treatment plant | |
| CN210065304U (en) | Sewage treatment unit | |
| CN209010326U (en) | A kind of integrated sewage treating apparatus of optimization | |
| CN112142260A (en) | Treatment system and method for decentralized sewage | |
| CN110950494A (en) | Integrated equipment for distributed domestic sewage treatment | |
| CN217377660U (en) | Sewage treatment equipment | |
| CN219972018U (en) | Rural distributed sewage treatment equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |