CN111704322A - Sewage treatment device based on microbial degradation and use method thereof - Google Patents
Sewage treatment device based on microbial degradation and use method thereof Download PDFInfo
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- CN111704322A CN111704322A CN202010629021.5A CN202010629021A CN111704322A CN 111704322 A CN111704322 A CN 111704322A CN 202010629021 A CN202010629021 A CN 202010629021A CN 111704322 A CN111704322 A CN 111704322A
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- microbial degradation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- 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)
- Filtration Of Liquid (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to the technical field of sewage treatment, in particular to a sewage treatment device based on microbial degradation and a using method thereof, which comprises a geosyncline, a movable filtering device, an electric lifting device, a filtered garbage cleaning device and a microbial degradation pool, the inner side of the ground groove is provided with a garbage collection bin, a primary filtering bin and a microbial degradation tank from left to right in sequence, the inner sides of the garbage collection bin and the primary filtering bin are provided with movable filtering devices, the rear sides of the movable filtering devices are provided with electric lifting devices, and the electric lifting device is positioned at the outer side of the ground groove, and a filtered garbage cleaning device is arranged right above the garbage collection bin and the primary filtering bin, the advanced filtering and cleaning work can be better carried out on the wastewater, so that the service cycle of the filtering structure is prolonged, and a better using effect is ensured.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a sewage treatment device based on microbial degradation and a using method thereof.
Background
Sewage treatment is a process of purifying sewage to meet the water quality requirement of discharging the sewage into a certain water body or reusing the sewage. Sewage treatment is widely applied to various fields such as building, agriculture, traffic, energy, petrifaction, environmental protection, urban landscape, medical treatment, catering and the like, and the sewage treatment also increasingly enters the daily life of common people, and along with the development of science and technology and the progress of human life, automobiles gradually begin to popularize, and while the automobiles are popularized, the development of the automobile washing industry is also driven, and when the automobiles are washed, a large amount of water sources are needed to be used, a large amount of waste water can be discharged, the waste water is discharged through a sewer pipeline and the like, so that a large amount of water resources are wasted, and the burden of waste water treatment is increased.
Most waste water treatment device who exists on the existing market does not set up the device that can clear up rubbish on the filter screen automatically, lead to when using for a long time, need carry out manual cleanness to rubbish on the filter screen, in order to guarantee the trafficability characteristic at water source, some waste water treatment device do not have the automatic device that carries out better taking out to filtration, lead to after long-time the use, washing and the change to filtration are comparatively complicated, be unfavorable for operation etc. consequently, propose a sewage treatment plant based on microbial degradation and application method thereof to above-mentioned problem.
Disclosure of Invention
The invention aims to provide a sewage treatment device based on microbial degradation and a using method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a sewage treatment plant based on microbial degradation, includes geosyncline, movable filter device, electric lift device, filters rubbish cleaning device and microbial degradation pond, the inboard of geosyncline is equipped with rubbish collection storehouse, prefiltration storehouse and microbial degradation pond from a left side to the right side in proper order, movable filter device is installed to rubbish collection storehouse and the inboard of prefiltration storehouse, electric lift device is installed to movable filter device's rear side, and electric lift device is located the outside of geosyncline, be equipped with directly over rubbish collection storehouse and the prefiltration storehouse and filter rubbish cleaning device.
Preferably, the movable filtering device comprises a collecting barrel, a filtering net cage, a supporting block, a water inlet pipe, a sewage pump and a water outlet pipe, wherein the collecting barrel is connected to the inner side of the garbage collecting bin in a sliding manner, the filtering net cage is connected to the inner side of the primary filtering bin in a sliding manner, the supporting block is arranged at the bottom end of the filtering net cage, a conical groove is formed in the inner side of the supporting block, the water inlet pipe is communicated with the bottom end of the conical groove, the other end of the water inlet pipe is communicated with the input end of the sewage pump, the water outlet pipe is communicated with the output end of the sewage pump, the other end of the water outlet pipe.
Preferably, the inner side of the filter net cage is sequentially provided with a quartz reverse osmosis layer, a charcoal reverse osmosis layer and an activated carbon filter layer from top to bottom.
Preferably, the collecting barrel and the top end of the inner side of the filtering net cage are fixedly connected with a connecting rod which is horizontally arranged, and the central position of the top end surface of the connecting rod is fixedly connected with a pull ring.
Preferably, the electric lifting device comprises a hydraulic rod, a rotating motor, a driving gear, a toothed ring, a supporting rod and a winch, the hydraulic rod is installed on the rear side of the geosyncline, the supporting rod is rotatably connected to the outer side of the top end of the hydraulic rod, the toothed ring is fixedly connected to the bottom end face of the supporting rod, the inner side of the toothed ring is rotatably connected with the hydraulic rod, the rotating motor is fixedly connected to the top end of the outer side of the hydraulic rod, the driving gear is fixedly connected to the tail end of a spindle of the rotating motor, the driving gear is meshed with the toothed ring, and the winch is fixedly connected to the bottom side of the other end of the supporting.
Preferably, filter rubbish cleaning device includes filter screen, accommodate motor, shock motor and eccentric wheel, the rear end face inboard of geosyncline is inlayed and is equipped with accommodate motor, accommodate motor's main shaft outside fixedly connected with filter screen, the lateral wall of geosyncline is seted up flutedly, is located leftwards the downside of recess is equipped with the eccentric groove, the inside wall in eccentric groove is inlayed and is equipped with the shock motor, the terminal fixedly connected with eccentric wheel of main shaft of shock motor, and the eccentric wheel setting is in the inboard in eccentric groove.
A sewage treatment device based on microbial degradation and a use method thereof comprise the following steps:
the method comprises the following steps: cleaning a filter plate: firstly, adding collected waste water into the inner side of a filter net box through a filter screen, filtering larger garbage in a water source to the upper side of the filter screen, controlling an adjusting motor to rotate after a certain time of use, further driving the filter screen to rotate anticlockwise for 180 degrees, then dropping part of garbage into the inner side of a collection barrel, then rotating a vibrating motor, further driving the filter screen to vibrate continuously through an eccentric wheel, and further effectively cleaning the residual garbage on the filter screen;
step two: water source purification: the water source after filtering through the filter screen falls into filter box's inboard, then falls into the inboard bottom of just filtering the storehouse through the filtration of quartz reverse osmosis layer, charcoal reverse osmosis layer and active carbon filter layer three-layer, then carries the water source through inlet tube and outlet pipe through the dredge pump and carries out degradation treatment in the microbial degradation pond:
step three: structure cleaning: after equipment operation a period, rotate the motor and rotate, and then drive the bracing piece through driving gear and ring gear and rotate to the realization removes the upside of collecting vessel or filter box with the hoist engine, then fixes the one end of hoist rope on the pull ring, thereby drives collecting vessel or filter box with a net rebound through hoist engine and connecting rod, thereby is convenient for clear up or change it.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, through the arranged movable filtering device, after the device integrally operates for a period of time, the internal filtering structure can be conveniently cleaned and replaced, and the collected garbage can be effectively removed, so that the device is convenient to use;
2. according to the invention, the movable filtering device can be well taken out by using electric power through the arranged electric lifting device, so that not only is the manpower effectively saved, but also the working efficiency is improved;
3. according to the invention, the waste water can be better subjected to advanced filtering and cleaning work through the arranged waste filtering and cleaning device, so that the service cycle of the filtering structure is prolonged, and a better use effect is ensured.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic cross-sectional view of a movable filter device according to the present invention;
FIG. 3 is a schematic cross-sectional view of an electric lifting device according to the present invention;
FIG. 4 is a schematic view of the overall structure of the filtering garbage cleaning device according to the present invention;
FIG. 5 is a schematic cross-sectional view of the filtering garbage cleaning device according to the present invention.
In the figure: 1-geosyncline, 2-movable filtering device, 201-collecting vessel, 202-filtering net cage, 203-supporting block, 204-water inlet pipe, 205-sewage pump, 206-water outlet pipe, 207-quartz reverse osmosis layer, 208-charcoal reverse osmosis layer, 209-active carbon filtering layer, 210-connecting rod, 211-pull ring, 3-electric lifting device, 301-hydraulic rod, 302-rotating motor, 303-driving gear, 304-toothed ring, 305-supporting rod, 306-windlass, 4-filtering garbage cleaning device, 401-filter screen, 402-adjusting motor, 403-vibrating motor, 404-eccentric wheel, 405-groove, 406-eccentric wheel groove, 5-microbial degradation pool, 6-garbage collecting bin, 7-primary filtration storehouse.
Detailed Description
Detailed Description
Example 1: referring to fig. 1-5, the present invention provides a technical solution:
the utility model provides a sewage treatment plant based on microbial degradation, including geosyncline 1, movable filter device 2, electric lift device 3, filter rubbish cleaning device 4 and microbial degradation pond 5, geosyncline 1's inboard is equipped with rubbish collection storehouse 6 from a left side to the right side in proper order, prefiltration storehouse 7 and microbial degradation pond 5, movable filter device 2 is installed to rubbish collection storehouse 6 and the inboard of prefiltration storehouse 7, electric lift device 3 is installed to movable filter device 2's rear side, and electric lift device 3 is located geosyncline 1's the outside, rubbish collection storehouse 6 is equipped with filter rubbish cleaning device 4 with prefiltration storehouse 7 directly over.
The movable filtering device 2 comprises a collecting barrel 201, a filtering net cage 202, a supporting block 203, a water inlet pipe 204, a sewage pump 205 and a water outlet pipe 206, wherein the collecting barrel 201 is connected to the inner side of a garbage collecting bin 6 in a sliding manner, the filtering net cage 202 is connected to the inner side of a primary filtering bin 7 in a sliding manner, the supporting block 203 is arranged at the bottom end of the filtering net cage 202, a conical groove is formed in the inner side of the supporting block 203, the water inlet pipe 204 is communicated with the bottom end of the conical groove, the other end of the water inlet pipe 204 is communicated with the input end of the sewage pump 205, the output end of the sewage pump 205 is communicated with the water outlet pipe 206, the other end of the water outlet pipe 206 is communicated with the microbial degradation pool 5, the sewage pump 205 is arranged at the inner side of the supporting block 203, and after the device integrally operates for a, the inner side of the filtering net cage 202 is sequentially provided with a quartz reverse osmosis layer 207, a charcoal reverse osmosis layer 208 and an activated carbon filtering layer 209 from top to bottom, the arrangement is convenient for better purifying a water source, the top ends of the inner sides of the collecting barrel 201 and the filtering net cage 202 are fixedly connected with a connecting rod 210 which is horizontally arranged, the central position of the top end surface of the connecting rod 210 is fixedly connected with a pull ring 211, the arrangement can be better matched with an electric lifting device to take out the collecting barrel 201 and the filtering net cage 202, the electric lifting device 3 comprises a hydraulic rod 301, a rotating motor 302, a driving gear 303, a toothed ring 304, a supporting rod 305 and a winch 306, the rear side of the geosyncline 1 is provided with the hydraulic rod 301, the outer side of the top end of the hydraulic rod 301 is rotatably connected with the supporting rod 305, the bottom end surface of the supporting rod 305 is fixedly connected with the toothed ring 304, the inner side of the toothed ring 304 is rotatably connected with the hydraulic, the tail end of the main shaft of the rotating motor 302 is fixedly connected with a driving gear 303, the driving gear 303 is meshed with a gear ring 304, the bottom side of the other end of the supporting rod 305 is fixedly connected with a winch 306, and the arrangement can be used for well taking out the movable filtering device by utilizing electric power, so that the labor is effectively saved, and the working efficiency is improved; filter rubbish cleaning device 4 and include filter screen 401, adjusting motor 402, shock motor 403 and eccentric wheel 404, ground groove 1's rear end face inboard inlays and is equipped with adjusting motor 402, adjusting motor 402's the main shaft outside fixedly connected with filter screen 401, ground groove 1's lateral wall is seted up fluted 405, the downside that is located left recess 405 is equipped with eccentric wheel groove 406, the inside wall of eccentric wheel groove 406 inlays and is equipped with shock motor 403, shock motor 403's the terminal fixedly connected with eccentric wheel 404 of main shaft, and eccentric wheel 404 sets up the inboard at eccentric wheel groove 406, this kind of setting can be better carry out leading filtration and cleaning work to waste water, thereby the cycle that filtration structure used has been prolonged, thereby better result of use has been guaranteed.
The using method comprises the following steps:
the method comprises the following steps: cleaning a filter plate: firstly, the collected waste water is added into the inner side of the filter net cage 202 through the filter screen 401, larger garbage in a water source can be filtered to the upper side of the filter screen 401, then after the waste water is used for a certain time, the adjusting motor 402 is controlled to rotate, the filter screen 401 is driven to rotate anticlockwise for 180 degrees, then part of the garbage can fall to the inner side of the collecting barrel 201, then the vibrating motor 403 rotates, and the filter screen 401 is driven to vibrate continuously through the eccentric wheel 404, so that the residual garbage on the filter screen 401 is cleaned effectively;
step two: water source purification: the water source filtered by the filter screen 401 falls into the inner side of the filter net cage 202, then falls into the inner bottom end of the primary filter bin 7 after being filtered by the quartz reverse osmosis layer 207, the charcoal reverse osmosis layer 208 and the activated carbon filter layer 209, and then is conveyed into the microbial degradation tank 5 for degradation treatment through the sewage pump 205 by the water inlet pipe 204 and the water outlet pipe 206:
step three: structure cleaning: after the equipment runs for a period of time, the rotating motor 302 rotates, and then the driving gear 303 and the toothed ring 304 drive the supporting rod 305 to rotate, so that the winch 306 is moved to the upper side of the collecting barrel 201 or the filtering net cage 202, then one end of a rope of the winch 306 is fixed on the pull ring 211, and the winch 306 and the connecting rod 310 drive the collecting barrel 201 or the filtering net cage 202 to move upwards, thereby being convenient for cleaning or replacing the collecting barrel 201 or the filtering net cage 202.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (7)
1. The utility model provides a sewage treatment plant based on microbial degradation, includes geosyncline (1), activity filter equipment (2), electric lift device (3), filters rubbish cleaning device (4) and microbial degradation pond (5), its characterized in that: the utility model discloses a garbage collection device, including geosyncline (1), garbage collection storehouse (6), prefiltration storehouse (7) and microbial degradation pond (5) are equipped with in proper order from a left side to the right side in the inboard of geosyncline (1), movable filter (2) are installed to garbage collection storehouse (6) and the inboard of prefiltration storehouse (7), electric lift device (3) are installed to the rear side of movable filter (2), and electric lift device (3) are located the outside of geosyncline (1), be equipped with directly over garbage collection storehouse (6) and prefiltration storehouse (7) and filter rubbish cleaning device (4).
2. The sewage treatment plant based on the microbial degradation of claim 1, wherein: the movable filtering device (2) comprises a collecting barrel (201), a filtering net box (202), a supporting block (203), a water inlet pipe (204), a sewage pump (205) and a water outlet pipe (206), wherein the collecting barrel (201) is connected to the inner side of a garbage collecting bin (6), the filtering net box (202) is connected to the inner side of a primary filtering bin (7) in a sliding mode, the supporting block (203) is arranged at the bottom end of the filtering net box (202), a conical groove is formed in the inner side of the supporting block (203), the bottom end of the conical groove is communicated with the water inlet pipe (204), the other end of the water inlet pipe (204) is communicated with the input end of the sewage pump (205), the water outlet pipe (206) is communicated with the output end of the sewage pump (205), the other end of the water outlet pipe (206) is communicated with a microbial degradation pool (5), and the sewage pump (205.
3. The sewage treatment plant based on the microbial degradation of claim 2, wherein: the inner side of the filtering net box (202) is sequentially provided with a quartz reverse osmosis layer (207), a charcoal reverse osmosis layer (208) and an activated carbon filtering layer (209) from top to bottom.
4. The sewage treatment plant based on the microbial degradation of claim 2, wherein: the collecting barrel (201) and the top end of the inner side of the filtering net box (202) are fixedly connected with a connecting rod (210) which is horizontally arranged, and the central position of the top end surface of the connecting rod (210) is fixedly connected with a pull ring (211).
5. The sewage treatment plant based on the microbial degradation of claim 1, wherein: electric lift device (3) include hydraulic stem (301), rotate motor (302), driving gear (303), ring gear (304), bracing piece (305) and hoist engine (306), hydraulic stem (301) is installed to the rear side of geosyncline (1), the top outside of hydraulic stem (301) is rotated and is connected there is bracing piece (305), the bottom end face fixedly connected with ring gear (304) of bracing piece (305), and the inboard and hydraulic stem (301) of ring gear (304) rotate and be connected, the outside top fixedly connected with of hydraulic stem (301) rotates motor (302), the terminal fixedly connected with driving gear (303) of the main shaft of rotation motor (302), and intermeshing between driving gear (303) and ring gear (304), the other end bottom side fixedly connected with hoist engine (306) of bracing piece (305).
6. The sewage treatment plant based on the microbial degradation of claim 1, wherein: filter rubbish cleaning device (4) and include filter screen (401), accommodate motor (402), vibrate motor (403) and eccentric wheel (404), the rear end face inboard of geosyncline (1) is inlayed and is equipped with accommodate motor (402), the main shaft outside fixedly connected with filter screen (401) of accommodate motor (402), the lateral wall of geosyncline (1) is seted up fluted (405), is located the left the downside of recess (405) is equipped with eccentric wheel groove (406), the inside wall of eccentric wheel groove (406) is inlayed and is equipped with vibrates motor (403), vibrate terminal fixedly connected with eccentric wheel (404) of main shaft of motor (403), and eccentric wheel (404) set up the inboard in eccentric wheel groove (406).
7. The use method of the sewage treatment device based on the microbial degradation as claimed in the claims 1-6, is characterized in that: the method comprises the following steps:
the method comprises the following steps: cleaning a filter plate: firstly, collected waste water is added into the inner side of a filter net box (202) through a filter net (401), larger garbage in a water source can be filtered to the upper side of the filter net (401), then after the waste water is used for a certain time, an adjusting motor (402) is controlled to rotate, the filter net (401) is further driven to rotate 180 degrees anticlockwise, then part of the garbage can fall into the inner side of a collecting barrel (201), then a vibrating motor (403) rotates, and the filter net (401) is further driven to vibrate continuously through an eccentric wheel (404), so that the residual garbage on the filter net (401) is effectively cleaned;
step two: water source purification: the water source after filtering through filter screen (401) falls into the inboard of filter box (202), then falls into the inboard bottom of primary filter storehouse (7) through the filtration of quartz reverse osmosis layer (207), charcoal reverse osmosis layer (208) and active carbon filter layer (209) three-layer, then carries the degradation processing in little biodegradable pond (5) through inlet tube (204) and outlet pipe (206) with the water source through dredge pump (205):
step three: structure cleaning: after equipment operation a period, rotation motor (302) rotate, and then drive bracing piece (305) through driving gear (303) and ring gear (304) and rotate, thereby realize moving collecting vessel (201) or the upside of filtering net case (202) with hoist engine (306), then fix the one end of hoist engine (306) rope on pull ring (211), thereby drive collecting vessel (201) or filtering net case (202) rebound through hoist engine (306) and connecting rod (310), thereby be convenient for clear up or change it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010629021.5A CN111704322A (en) | 2020-07-01 | 2020-07-01 | Sewage treatment device based on microbial degradation and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010629021.5A CN111704322A (en) | 2020-07-01 | 2020-07-01 | Sewage treatment device based on microbial degradation and use method thereof |
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| CN111704322A true CN111704322A (en) | 2020-09-25 |
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| CN202010629021.5A Pending CN111704322A (en) | 2020-07-01 | 2020-07-01 | Sewage treatment device based on microbial degradation and use method thereof |
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| KR20040088148A (en) * | 2003-04-09 | 2004-10-16 | 이동거 | Wastewater disposal plant and wastewater disposal method |
| CN206901977U (en) * | 2017-04-11 | 2018-01-19 | 江西浩德实业有限公司 | A kind for the treatment of tank with biodegrading tank |
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| CN210448268U (en) * | 2019-08-14 | 2020-05-05 | 江苏汉光实业股份有限公司 | Waste residue filter equipment is used in production of special agent of high transparent packaging film of polyene |
| CN210786389U (en) * | 2019-08-30 | 2020-06-19 | 山东汇创环保设备有限公司 | Bury formula sewage treatment device |
| CN210885346U (en) * | 2019-08-12 | 2020-06-30 | 渤海今日（天津）科技有限公司 | River waste water purifies biomembrane filtration equipment |
-
2020
- 2020-07-01 CN CN202010629021.5A patent/CN111704322A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040088148A (en) * | 2003-04-09 | 2004-10-16 | 이동거 | Wastewater disposal plant and wastewater disposal method |
| CN206901977U (en) * | 2017-04-11 | 2018-01-19 | 江西浩德实业有限公司 | A kind for the treatment of tank with biodegrading tank |
| CN209835845U (en) * | 2019-04-26 | 2019-12-24 | 郑州市环境保护监测中心站 | Sewage treatment filter equipment |
| CN210885346U (en) * | 2019-08-12 | 2020-06-30 | 渤海今日（天津）科技有限公司 | River waste water purifies biomembrane filtration equipment |
| CN210448268U (en) * | 2019-08-14 | 2020-05-05 | 江苏汉光实业股份有限公司 | Waste residue filter equipment is used in production of special agent of high transparent packaging film of polyene |
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Application publication date: 20200925 |