CN113912185A - Low-energy-consumption rural sewage treatment device and method - Google Patents
Low-energy-consumption rural sewage treatment device and method Download PDFInfo
- Publication number
- CN113912185A CN113912185A CN202111326054.3A CN202111326054A CN113912185A CN 113912185 A CN113912185 A CN 113912185A CN 202111326054 A CN202111326054 A CN 202111326054A CN 113912185 A CN113912185 A CN 113912185A
- Authority
- CN
- China
- Prior art keywords
- sewage treatment
- aeration
- rural sewage
- inner cylinder
- low
- 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.)
- Pending
Links
- 239000010865 sewage Substances 0.000 title claims abstract description 45
- 238000005265 energy consumption Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000005273 aeration Methods 0.000 claims abstract description 30
- 238000003756 stirring Methods 0.000 claims abstract description 22
- 230000000694 effects Effects 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- 239000010802 sludge Substances 0.000 claims description 20
- 239000003570 air Substances 0.000 claims description 10
- 230000003851 biochemical process Effects 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000011112 process operation Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Images
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
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
The invention provides a low-energy-consumption rural sewage treatment device and a low-energy-consumption rural sewage treatment method, which relate to the field of rural sewage treatment and comprise an outer tank body, an inner cylinder body, a stirring mechanism and an aeration mechanism, wherein the inner cylinder body divides the inner space of the outer tank body into an outer cavity and an inner cavity which are communicated with each other, and the stirring mechanism comprises a motor, a rotating shaft and stirring blades; meanwhile, the occupied area is saved; the outer cavity of the invention forms a shrinkage area from bottom to top, and can form a gas stripping effect during aeration, thereby fully utilizing the aeration capacity of an external gas source; the sewage can effectively improve the backflow amount in the inner cylinder body, and the sewage treatment capacity and efficiency are improved; because no power equipment is installed underwater, the maintenance cost is reduced.
Description
Technical Field
The invention relates to the field of rural sewage treatment, in particular to a low-energy-consumption rural sewage treatment device and method.
Background
With the development and progress of rural agriculture in China, the number of rural tap water users is continuously increased, the generation amount of domestic sewage is also continuously increased, compared with the urban domestic sewage treatment difficulty is higher due to the shortage of infrastructure and the living dispersity, and when the domestic sewage is randomly discharged, the rural water environment has the risks of damage and pollution, so that the living environment and quality of residents are seriously influenced.
The existing domestic sewage treatment method mainly adopts a method of primary pretreatment and secondary biochemical treatment, mainly comprises a biological contact method, an SBR method, an oxidation ditch method and the like, but the existing sludge treatment system and equipment have the disadvantages of complex operation, non-compact structure, high energy consumption, low treatment efficiency and difficulty in adapting to rural areas.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects in the prior art and provides a low-energy-consumption rural sewage treatment device and method.
The invention is realized by the following technical scheme: a low-energy-consumption rural sewage treatment device, which comprises an outer tank body, an inner cylinder body, a stirring mechanism and an aeration mechanism, wherein,
the inner barrel divides the inner space of the outer tank into an outer cavity and an inner cavity which are communicated, the upper end of the inner barrel forms a water falling weir, the inner barrel is of a funnel structure which is communicated up and down, the lower part of the outer cavity is provided with a water inlet and a sludge discharge port, the water inlet and the sludge discharge port are arranged at two sides of the outer tank, and the upper part of the inner cavity is provided with a water outlet;
the aeration mechanism comprises a plurality of groups of aeration heads communicated with an external air source, and the aeration heads are arranged at the lower part of the outer cavity and positioned at the upper side of the lower end outlet of the inner cylinder;
the stirring mechanism comprises a motor, a rotating shaft and stirring blades, the motor drives the stirring blades to rotate through the rotating shaft, and the stirring blades are arranged below the aeration head.
According to above-mentioned technical scheme, preferred, the inboard upper portion of interior barrel be equipped with outer jar of body top fixed connection's inner wall, the inner wall extends downwards inside the funnel structure.
According to the technical scheme, preferably, the outer cavity is divided into an aerobic zone and an anoxic zone which are communicated up and down through the aeration head, and the water inlet is communicated with the anoxic zone.
According to the technical scheme, preferably, the inner side wall of the anoxic zone is uniformly provided with a plurality of groups of spoilers.
According to the technical scheme, preferably, the rotating shaft is arranged in the inner cylinder body, and the central axes of the rotating shaft, the inner cylinder body and the outer tank body are overlapped.
According to the technical scheme, preferably, the front end of the water outlet is provided with a water outlet weir.
The invention also provides a low-energy-consumption rural sewage treatment method, and the low-energy-consumption rural sewage treatment device comprises the following steps:
and (3) biochemical process: sewage enters the anoxic zone of the outer cavity along the water inlet, is mixed with air sprayed by the aeration mechanism, and then enters the aerobic zone after being mixed to form an air stripping effect, so that the sewage, sludge and air flow upwards to realize the biochemical process of the sewage;
and (3) a separation process: sewage and sludge enter the inner cavity through the water dropping weir, the sludge sinks to the lower part of the inner cavity until entering the anoxic zone, the backflow of the sludge is realized, and the treated water is discharged through the water outlet.
The invention has the beneficial effects that:
(1) the invention effectively reduces the installation quantity of equipment, greatly saves the operation energy consumption and improves the stability of the process operation; meanwhile, the occupied area is saved;
(2) the outer cavity of the invention forms a shrinkage area from bottom to top, and can form a gas stripping effect during aeration, thereby fully utilizing the aeration capacity of an external gas source;
(3) the sewage can effectively improve the backflow amount in the inner cylinder body, and the sewage treatment capacity and efficiency are improved;
(4) because no power equipment is installed underwater, the maintenance cost is reduced.
Drawings
FIG. 1 shows a schematic structural diagram according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a structure in operation according to an embodiment of the present invention;
in the figure: 1. an outer tank body; 2. an inner cylinder; 3. a stirring mechanism; 4. an aeration mechanism; 5. an outer cavity; 6. an inner cavity; 7. a water falling weir; 8. a water inlet; 9. a sludge discharge port; 10. a water inlet flow channel; 11. an aeration head; 12. an aerobic zone; 13. an anoxic zone; 14. a motor; 15. a rotating shaft; 16. stirring blades; 17. a spoiler; 18. and (4) an effluent weir.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, not all embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in the figure, the invention provides a low-energy-consumption rural sewage treatment device, which comprises an outer tank body 1, an inner cylinder body 2, a stirring mechanism 3 and an aeration mechanism 4, wherein,
the inner barrel 2 divides the inner space of the outer tank body 1 into an outer cavity 5 and an inner cavity 6 which are communicated, the upper end of the inner barrel 2 forms a water falling weir 7, the inner barrel 2 is of a funnel structure which is communicated up and down, the lower part of the outer cavity 5 is provided with a water inlet 8 and a mud discharging port 9, the water inlet 8 and the mud discharging port 9 are arranged at two sides of the outer tank body 1, the upper part of the inner cavity 6 is provided with a water outlet, the upper part of the inner side of the inner barrel 2 is provided with an inner wall which is fixedly connected with the top of the outer tank body 1, the inner wall extends downwards to the inside of the funnel structure, and a water inlet flow channel 10 entering the inner cavity 6 is formed between the inner wall and the inner barrel 2;
meanwhile, the aeration mechanism 4 comprises a plurality of groups of aeration heads 11 communicated with an external air source, the aeration heads 11 are distributed at the lower part of the outer cavity 5 and are positioned at the upper side of the outlet at the lower end of the inner barrel 2, the external air source is preferably a blower, the outer cavity 5 is divided into an aerobic zone 12 and an anoxic zone 13 which are communicated up and down through the aeration heads 11, and the water inlet 8 is communicated with the anoxic zone 13;
the stirring mechanism 3 comprises a motor 14, a rotating shaft 15 and stirring blades 16, the motor 14 drives the stirring blades 16 to rotate through the rotating shaft 15, and the stirring blades 16 are arranged below the aeration head 11.
According to the above embodiment, preferably, the inner side wall of the anoxic zone 13 is uniformly provided with a plurality of groups of spoilers 17, which can form an omnidirectional three-dimensional stirring for the mud-water mixture together with the stirring blades 16.
Further, the rotating shaft 15 is arranged in the inner cylinder 2, and the central axes of the rotating shaft 15, the inner cylinder 2 and the outer cylinder 1 are overlapped, so that the mixing uniformity of the sludge and the sewage is effectively enhanced.
Furthermore, the front end of the water outlet is provided with a water outlet weir 18 which effectively controls water flow and liquid level.
The invention also provides a low-energy-consumption rural sewage treatment method, and the low-energy-consumption rural sewage treatment device comprises the following steps:
and (3) biochemical process: sewage enters an anoxic zone 13 of the outer cavity 5 along the water inlet 8, is mixed with air sprayed by the aeration mechanism 4, enters an aerobic zone 12 after being mixed, forms an air stripping effect, and flows upwards to the top of the outer cavity 5, so that the biochemical process of the sewage is realized;
and (3) a separation process: the gas continuously rises and is discharged, the sewage and the sludge enter the inner cavity 6 through the water falling weir 7, and the sludge continuously slides downwards through the inner cavity due to the particle size and gravity difference, so that the solid-liquid separation is completed; the sludge sinks to the lower part of the inner cavity 6 until entering the anoxic zone 13, the return flow of the sludge is realized, the treated water is discharged through the water outlet, the whole separation process of gas, water and sludge only needs the air blower to complete the return flow, and compared with the traditional sewage treatment biochemical section, the internal and external return pumps are saved, and the energy consumption is reduced.
The invention has the beneficial effects that:
(1) the invention effectively reduces the installation quantity of equipment, greatly saves the operation energy consumption and improves the stability of the process operation; meanwhile, the occupied area is saved;
(2) the outer cavity 5 of the invention forms a shrinkage area from bottom to top, and can form a gas stripping effect during aeration, thereby fully utilizing the aeration capacity of an external gas source;
(3) the sewage can effectively improve the backflow amount in the inner cylinder body 2, and the sewage treatment capacity and efficiency are improved;
(4) because no power equipment is installed underwater, the maintenance cost is reduced.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solution of the invention, and not for limiting the same; while the invention has been described in detail and with reference to the foregoing embodiments, those skilled in the art will appreciate that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A low-energy-consumption rural sewage treatment device which is characterized by comprising an outer tank body, an inner cylinder body, a stirring mechanism and an aeration mechanism, wherein,
the inner cylinder body divides the inner space of the outer tank body into an outer cavity and an inner cavity which are communicated, the upper end of the inner cylinder body forms a water falling weir, the inner cylinder body is of a funnel structure which is communicated up and down, the lower part of the outer cavity body is provided with a water inlet and a sludge discharge port, the water inlet and the sludge discharge port are arranged on two sides of the outer tank body, and the upper part of the inner cavity body is provided with a water outlet;
the aeration mechanism comprises a plurality of groups of aeration heads communicated with an external air source, and the aeration heads are arranged at the lower part of the outer cavity and positioned at the upper side of the lower end outlet of the inner barrel;
the stirring mechanism comprises a motor, a rotating shaft and stirring blades, the motor drives the stirring blades to rotate through the rotating shaft, and the stirring blades are arranged below the aeration head.
2. The rural sewage treatment plant of low energy consumption of claim 1, wherein the inner upper part of the inner cylinder is provided with an inner wall fixedly connected with the top of the outer tank body, and the inner wall extends downwards to the inside of the funnel structure.
3. The rural sewage treatment plant of claim 2 with low energy consumption is characterized in that the outer cavity is divided into an aerobic zone and an anoxic zone which are communicated up and down through the aeration head, and the water inlet is communicated with the anoxic zone.
4. The rural sewage treatment plant of claim 3 with low energy consumption is characterized in that a plurality of groups of spoilers are uniformly arranged on the inner side wall of the anoxic zone.
5. The rural sewage treatment plant of claim 3 with low energy consumption is characterized in that the rotating shaft is arranged in the inner cylinder body, and the central axes of the rotating shaft, the inner cylinder body and the outer tank body are coincident.
6. The low-energy-consumption rural sewage treatment device according to claim 3, wherein the front end of the water outlet is provided with a water outlet weir.
7. A low-energy-consumption rural sewage treatment method is characterized in that the low-energy-consumption rural sewage treatment device of any one of claims 3-6 is adopted, and the method comprises the following steps:
and (3) biochemical process: sewage enters the anoxic zone of the outer cavity along the water inlet, is mixed with air sprayed by the aeration mechanism, and then enters the aerobic zone after being mixed to form an air stripping effect, so that the sewage, sludge and air flow upwards to realize the biochemical process of the sewage;
and (3) a separation process: sewage and sludge enter the inner cavity through the water dropping weir, the sludge sinks to the lower part of the inner cavity until entering the anoxic zone, the backflow of the sludge is realized, and the treated water is discharged through the water outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111326054.3A CN113912185A (en) | 2021-11-10 | 2021-11-10 | Low-energy-consumption rural sewage treatment device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111326054.3A CN113912185A (en) | 2021-11-10 | 2021-11-10 | Low-energy-consumption rural sewage treatment device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113912185A true CN113912185A (en) | 2022-01-11 |
Family
ID=79245901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111326054.3A Pending CN113912185A (en) | 2021-11-10 | 2021-11-10 | Low-energy-consumption rural sewage treatment device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113912185A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4585556A (en) * | 1982-06-14 | 1986-04-29 | Agrozet, Koncernova Obchodna Organizacia | Arrangement for removal of sludge separated by flotation in the biological activating cleaning of waste waters using a fluid filtration |
| JPH09323092A (en) * | 1996-06-04 | 1997-12-16 | Hokoku Kogyo Co Ltd | Sewage treating device |
| WO2014005540A1 (en) * | 2012-07-06 | 2014-01-09 | Jinmin Li | Apparatus and method for biological sewage treatment |
| CN207313246U (en) * | 2017-09-27 | 2018-05-04 | 上海梅思泰克水环境技术有限公司 | A kind of sanitary sewage disposal multiple elements design integrated apparatus |
| CN208856996U (en) * | 2018-08-17 | 2019-05-14 | 绿地环保科技股份有限公司 | A kind of integrated A2O sewage-treatment plant |
| CN112047461A (en) * | 2020-09-22 | 2020-12-08 | 天津壹新环保工程有限公司 | SBR (sequencing batch reactor) biological integrated wastewater treatment tank |
| CN112250186A (en) * | 2020-10-09 | 2021-01-22 | 北京华益德环境科技有限责任公司 | High-efficiency synchronous nitrification and denitrification reactor |
| CN216106232U (en) * | 2021-11-10 | 2022-03-22 | 天津壹新环保工程有限公司 | Rural sewage treatment plant of low energy consumption |
-
2021
- 2021-11-10 CN CN202111326054.3A patent/CN113912185A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4585556A (en) * | 1982-06-14 | 1986-04-29 | Agrozet, Koncernova Obchodna Organizacia | Arrangement for removal of sludge separated by flotation in the biological activating cleaning of waste waters using a fluid filtration |
| JPH09323092A (en) * | 1996-06-04 | 1997-12-16 | Hokoku Kogyo Co Ltd | Sewage treating device |
| WO2014005540A1 (en) * | 2012-07-06 | 2014-01-09 | Jinmin Li | Apparatus and method for biological sewage treatment |
| CN207313246U (en) * | 2017-09-27 | 2018-05-04 | 上海梅思泰克水环境技术有限公司 | A kind of sanitary sewage disposal multiple elements design integrated apparatus |
| CN208856996U (en) * | 2018-08-17 | 2019-05-14 | 绿地环保科技股份有限公司 | A kind of integrated A2O sewage-treatment plant |
| CN112047461A (en) * | 2020-09-22 | 2020-12-08 | 天津壹新环保工程有限公司 | SBR (sequencing batch reactor) biological integrated wastewater treatment tank |
| CN112250186A (en) * | 2020-10-09 | 2021-01-22 | 北京华益德环境科技有限责任公司 | High-efficiency synchronous nitrification and denitrification reactor |
| CN216106232U (en) * | 2021-11-10 | 2022-03-22 | 天津壹新环保工程有限公司 | Rural sewage treatment plant of low energy consumption |
Non-Patent Citations (2)
| Title |
|---|
| 刘伟等: "《污水处理工程调试与运营》", vol. 1, 武汉理工大学出版社, pages: 75 * |
| 罗湘成: "《中国基础水利、水资源与水处理实务》", vol. 1, 28 February 1998, 武汉理工大学出版社, pages: 1195 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5961756B2 (en) | Biological sewage treatment apparatus and method | |
| CN216106232U (en) | Rural sewage treatment plant of low energy consumption | |
| CN201193209Y (en) | Internal circulating anaerobic reactor | |
| CN205241342U (en) | Circulation formula anaerobic reactor | |
| CN114716014A (en) | Integrated domestic sewage treatment device | |
| CN203319735U (en) | Dissolved air floatation device | |
| CN109019856A (en) | Cyclic hardening outgassing anaerobic reactor in a kind of centrifugation | |
| CN101481176A (en) | Water distribution apparatus and method for up-flow anaerobic sludge bed | |
| CN113912185A (en) | Low-energy-consumption rural sewage treatment device and method | |
| CN217265067U (en) | Novel sewage biochemical equipment | |
| CN216191396U (en) | Rural sewage treatment plant of low energy consumption assembled | |
| CN101508486A (en) | Anaerobic reactor tridimensional flow agitating apparatus | |
| CN205838669U (en) | Anaerobic fermentation reaction unit | |
| CN214004151U (en) | Integrated flocculation precipitation equipment | |
| CN115159652A (en) | Electrolyte processing system | |
| CN210559995U (en) | High solid sludge anaerobic digestion mixing system | |
| CN209952846U (en) | Production system for preparing inorganic high-molecular composite polymer polyaluminum ferric chloride | |
| CN203392970U (en) | Air dissolution and electrolysis integrated air floatation equipment | |
| CN202755247U (en) | Closed type flotation stripping machine | |
| CN219689499U (en) | Water treatment equipment capable of self-sucking sewage | |
| CN211078585U (en) | Ultramicro power sewage treatment equipment | |
| CN217103239U (en) | UASB reactor with high-efficient circulation system | |
| CN214270526U (en) | Circulating filter device for water purification plant | |
| CN218951146U (en) | Sewage treatment vertical integrated equipment | |
| CN108773902A (en) | A kind of integral life sewage biochemical treatment system |
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 |