CN213112700U - Granular sludge recovery device - Google Patents
Granular sludge recovery device Download PDFInfo
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- CN213112700U CN213112700U CN202021659571.3U CN202021659571U CN213112700U CN 213112700 U CN213112700 U CN 213112700U CN 202021659571 U CN202021659571 U CN 202021659571U CN 213112700 U CN213112700 U CN 213112700U
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- 239000010802 sludge Substances 0.000 title claims abstract description 161
- 238000011084 recovery Methods 0.000 title claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 140
- 238000000926 separation method Methods 0.000 claims abstract description 38
- 238000005192 partition Methods 0.000 claims abstract description 24
- 238000001914 filtration Methods 0.000 claims abstract description 15
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 9
- 238000004064 recycling Methods 0.000 claims description 46
- 239000000706 filtrate Substances 0.000 claims description 16
- 239000008187 granular material Substances 0.000 claims description 11
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 239000010935 stainless steel Substances 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 7
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 239000010865 sewage Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 241000894006 Bacteria Species 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000009141 biological interaction Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- -1 i.e. Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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- 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 utility model provides a granular sludge recovery unit includes highly degressive district, muddy water disengagement zone and granular sludge recovery district of intaking from the upper reaches to low reaches in proper order, its characterized in that: the water inlet area, the sludge-water separation area and the granular sludge recovery area are separated by vertical partition plates, and the heights of the partition plates from the upstream to the downstream are sequentially reduced; the sludge-water separation zone comprises a first clapboard erected between the water inlet zone and the sludge-water separation zone and a filtering screen arranged on a second clapboard between the sludge-water separation zone and the granular sludge recovery zone, and the horizontal inclination angle of the filtering screen is 25-40 degrees. The utility model discloses a granular sludge recovery device can filter out the flocculent mud in the reactor when holding back and retrieving the granular sludge that bioreactor goes out the aquatic and runs off to simple structure is compact, and the suitability is strong.
Description
Technical Field
The utility model belongs to the sewage treatment field, particularly, the utility model relates to a granular sludge recovery device.
Background
In the field of sewage treatment, biological treatment technology is the mainstream technology, and a bioreactor inoculated with granular sludge is generally regarded as an energy-saving, efficient, green and environment-friendly sewage treatment device, wherein the granular sludge has good sedimentation performance and can be retained in the bioreactor under the conditions of high gas production rate and upward flow rate, so that the sludge granulation can ensure that the bioreactor can retain high-concentration sludge concentration, and the bioreactor can bear higher organic matter volume load and hydraulic load.
Granular sludge refers to one or a plurality of tiny 'ecological communities' which are suitable for the growth of bacteria and have autonomous selection and specific functions, and are formed by mutually attracting and mutually benefiting symbiotic aggregation of different bacterial populations. Sludge granulation is a complex process of physical, chemical and biological interaction, and granular aggregates formed by bacteria in the process are similar to a micro-ecosystem and are extremely rich in biological species. The granular sludge is generally in a regular spherical or ellipsoidal shape, has the density of about 1030-1080kg/m3, and has the particle size of generally 0.5-5mm, the maximum particle size can even reach 7mm, and the larger the particle size, the lower the density of the granular sludge. When the particle size of the granular sludge is larger, the inside of the granular sludge is in a hungry state, so that the activity of the granular sludge is reduced, and the sedimentation performance is poor; especially, when the sludge concentration in the reactor is too high, or the water flow impact is too large, the aeration air quantity is not properly controlled, and other process abnormalities, the phenomenon that the granular sludge is lost from the reactor exists. Flocculent sludge is generally suspended matters or mixed bacteria brought into the bioreactor by inlet water, and has a matrix competition relationship with granular sludge, and the existence of the flocculent sludge in the bioreactor can influence the mass transfer effect inside the granular sludge and increase the difficulty of the granular sludge in acquiring substrates.
The granular sludge has long propagation time and small sludge production amount, keeps normal granular sludge concentration in the reactor, reduces flocculent sludge in the bioreactor and improves the effective content of the granular sludge, and is particularly important for maintaining the high-efficiency operation of the bioreactor. The market price of the granular sludge dry matter is more than 15 ten thousand yuan/ton, and considerable economic income can be brought if the granular sludge dry matter can be effectively recycled.
The utility model discloses a chinese utility model CN204999788U discloses an anaerobism granular sludge entrapment device, it includes granule entrapment device, back flush unit and granular sludge recovery unit, the inside filter core that is equipped with of granule entrapment device, granule entrapment device bottom water inlet end is connected to the delivery port of anaerobic reaction pond through water intake pipe, be equipped with inlet valve on the water intake pipe, the play water end at granule entrapment device top is connected with outlet conduit, be equipped with out the water valve on the outlet conduit, it is connected to through back flush pipe to go out the water end back flush unit, be equipped with back flush valve on the back flush pipe, granule entrapment device bottom mud discharging end is connected to granular sludge recovery unit through mud discharging pipe, the bottom of granular sludge entrapment device is equipped with the mud discharging valve.
SUMMERY OF THE UTILITY MODEL
Although the existing granular sludge recovery device such as the device disclosed in chinese utility model patent CN204999788U can capture and recover granular sludge, the device cannot effectively filter flocculent sludge, and the device has a complicated structure and is intermittently operated, requiring manual cleaning. Complicated, the complicated problem that needs manual treatment of operation of above-mentioned structure for solving existence among the prior art, the utility model provides a granular sludge recovery unit when holding back and retrieving the granular sludge that bioreactor goes out the aquatic and runs off, filters out the flocculent mud in the reactor.
The utility model provides a granule sludge recycling device, includes highly degressive intake zone, muddy water separation district and granule sludge recycling district from the upper reaches to the low reaches in proper order, its characterized in that: the water inlet area, the sludge-water separation area and the granular sludge recovery area are separated by vertical partition plates, and the heights of the partition plates from the upstream to the downstream are sequentially reduced; the sludge-water separation zone comprises a first clapboard erected between the water inlet zone and the sludge-water separation zone and a filtering screen arranged on a second clapboard between the sludge-water separation zone and the granular sludge recovery zone, and the horizontal inclination angle of the filtering screen is 25-40 degrees.
Preferably, according to the above granular sludge recycling apparatus, the sludge-water separation zone further comprises a spray head disposed above the filter screen, a filtrate collection tank formed by a first partition plate between the water inlet zone and the sludge-water separation zone and a second partition plate between the sludge-water separation zone and the granular sludge recycling zone, and a water outlet.
Preferably, according to the above granular sludge recycling apparatus, the water inlet region comprises a water inlet and a water inlet buffer tank, wherein the upstream of the water inlet is communicated with the water outlet pipeline of the bioreactor, and the downstream of the water inlet is communicated with the water inlet buffer tank.
Preferably, according to the above granular sludge recycling apparatus, the first partition plate between the water inlet zone and the sludge-water separation zone is lower than the water outlet pipe of the bioreactor.
Preferably, according to the above granular sludge recycling apparatus, wherein the height of the first partition plate between the water inlet zone and the sludge-water separation zone is 0.5 to 1 meter lower than the water outlet pipe of the bioreactor.
Preferably, according to the above granular sludge recycling apparatus, wherein the granular sludge recycling region includes a sludge collection tank and a sludge recycling pipe, and the sludge recycling pipe is communicated with the sludge recycling pump.
Preferably, according to the above granular sludge recovery apparatus, the water inlet region, the sludge-water separation region and the granular sludge recovery region form an integrated box structure, and the ratio of the areas of the bottom surfaces of the water inlet buffer tank, the filtrate collection tank and the sludge collection tank is 1:2-3: 1.
Preferably, according to the above granular sludge recycling apparatus, a bottom surface of the integrated box structure is rectangular, and an upper end of the integrated box structure is not provided with a cover plate.
Preferably, in the granular sludge recycling apparatus, the filter screen is rectangular and made of stainless steel, and the lower portion of the filter screen is made of stainless steel strips as a support member, and the area of the support member corresponds to the area of the upper portion of the sludge-water separation zone.
Preferably, according to the above granular sludge recycling apparatus, wherein the water inlet of the water inlet region is located at the front or both sides of the water inlet buffer tank.
Preferably, according to the above granular sludge recovery apparatus, the water outlet of the sludge-water separation zone is located at the bottom or at both sides of the filtrate collection tank.
Preferably, according to the granular sludge recovery device, the water inlets of the water inlet area and the water outlets of the sludge-water separation area have the same number and the same pipe diameter.
Preferably, according to the above granular sludge recycling apparatus, in the granular sludge recycling region, a sludge recycling pipe is located at the bottom of the sludge collecting tank, and the sludge recycling pipe is provided with a flushing line with a valve.
Use the utility model discloses a granule sludge recycling device can gain following beneficial effect: granular sludge carried in the effluent of the bioreactor can be efficiently intercepted and recovered, flocculent sludge in the bioreactor can be effectively filtered, and the effective content of the granular sludge is improved; additionally, the utility model discloses ground compact structure, convenient operation does not have the running cost, extensive applicability.
Drawings
FIG. 1 is a schematic view of the granular sludge recycling apparatus of the present invention.
Fig. 2 is a schematic view of a filter screen.
The system comprises a water inlet 1, a water inlet buffer tank 2, a first partition plate 3, a spray head 4, a filtering screen 5, a filtrate collecting tank 6, a water outlet 7, a second partition plate 8, a sludge collecting tank 9 and a sludge recycling pipe 10.
Detailed Description
After waste water or sewage are treated by the bioreactor, the treated water flows out through the water outlet pipeline, useful granular sludge and flocculent sludge having negative influence on the mass transfer effect of the granular sludge are still mixed in the water flowing out from the water outlet pipeline, as described in the background section, the granular sludge is beneficial to sewage treatment, and the flocculent sludge is unfavorable for sewage treatment, how to recover the granular sludge in the discharged water after the waste water or sewage treatment and return the bioreactor and effectively filter out the flocculent sludge is the problem of the inventor of the utility model which has been considered in the aspect of sewage treatment or waste water treatment.
The inventor of the utility model designs a granular sludge recovery device through long-term research, which can effectively recover granular sludge and filter flocculent sludge, has simple and compact structure, can be integrally arranged, can be independently formed and can be matched with any existing bioreactor, and the granular sludge recovery device is functionally divided into three regions, namely a water inlet region, a sludge water separation region and a granular sludge recovery region, in the specification, the water outlet pipeline of the bioreactor is regarded as the upstream of the granular sludge recovery device, the opposite end is regarded as the downstream, in order to ensure the smooth operation of the granular sludge recovery device, the inventor reduces the heights of the water inlet region, the sludge water separation region and the granular sludge recovery region which are sequentially arranged from the upstream to the downstream, namely, the height of the water inlet region is greater than that of the sludge water separation region, the height of the mud-water separation zone is greater than that of the granular sludge recovery zone.
As shown in FIG. 1, in the granular sludge recycling apparatus of the present invention, the water inlet area, the sludge-water separation area and the granular sludge recycling area are separated by vertical partition plates, and the heights of the partition plates from the upstream to the downstream are sequentially reduced, i.e., a first partition plate 3 is disposed between the water inlet area and the sludge-water separation area, a second partition plate 8 is disposed between the sludge-water separation area and the granular sludge recycling area, and the height of the first partition plate 3 is greater than that of the second partition plate 8, and the height of the first partition plate 3 is set to be lower than that of the outlet conduit of the bioreactor, and according to the size of most of bioreactors, the height of the first partition plate 3 is preferably set to be lower than that of the outlet conduit of the bioreactor by 0.5-1 meter.
The water inlet area comprises a water inlet 1 and a water inlet buffer groove 2, the upstream of the water inlet 1 is communicated with a water outlet pipeline (not shown in the figure) of the bioreactor, and the downstream of the water inlet 1 is communicated with the water inlet buffer groove 2. The water inlet 1 can be arranged on the front surface (preferred) of the water inlet buffer groove 2, and can also be arranged on two sides of the water inlet buffer groove 2.
The mud-water separation zone includes shower nozzle 4, filter screen 5, filtrating collecting vat 6 and delivery port 7, and filter screen 5 sets up in filtrating collecting vat 6's top, is supported by first baffle 3 and second baffle 8, and its area is enough to cover the top of mud-water separation zone, promptly, is more than or equal to the area above filtrating collecting vat 6, because first baffle 1 highly is greater than the height of second baffle 8, so filter screen 5 has a horizontal inclination beta, the utility model discloses an inventor has proved through many times of actual verification that if horizontal inclination beta is 25-40 degrees, then the effect is the best. The mesh number of the filter screen 5 can be adjusted according to the particle size of the granular sludge; the spray heads 4 are arranged above the filter screen 5 and directly spray the screen surface of the filter screen 5, and the installation height, the number and the spray angle of the spray heads 4 can be adjusted according to the blockage degree of the screen surface of the filter screen 5; the water outlet 7 may be arranged at the bottom of the filtrate collection tank 6 (preferably), or may be arranged on both sides of the filtrate collection tank 6.
The number and size of the water inlet 1 of the water inlet area and the water outlet 7 of the mud-water separation area are not limited, but the water inlet 1 and the water outlet 7 of the mud-water separation area are preferably the same in number and same in pipe diameter, and preferably have one water inlet 1 and one water outlet 7.
The granular sludge recovery area comprises a sludge collection tank 9 and a sludge recovery pipe 10, wherein the sludge recovery pipe 10 is arranged at the bottom of the sludge collection tank 9, and the sludge recovery pipe is provided with a flushing pipeline with a valve and is communicated with a sludge recovery pump (not shown in the figure).
The granular sludge recovery device of the utility model is an integrated box structure, the bottom surface of the granular sludge recovery device can be set into any convenient shape according to the use environment, the bottom surface is preferably rectangular, and the upper end of the granular sludge recovery device is not provided with a cover plate; the area ratio of the bottom surfaces of the water inlet buffer tank 2, the filtrate collecting tank 6 and the sludge collecting tank 9 is preferably 1:2-3: 1.
The utility model discloses a granular sludge recovery device's bottom surface is under the rectangular condition, and filter screen 5 also is the rectangle, and its material is preferred stainless steel, and filter screen 5 bottom surface adopts the stainless steel billet to do the support.
The utility model discloses a granular sludge recovery device's work flow does: the water treated by the bioreactor is discharged from a water outlet pipeline, enters the water inlet 1 of the granular sludge recovery device, enters the water inlet buffer tank 2 from the water inlet 1, when the liquid level entering the buffer tank 2 is higher than the first partition plate 3 between the water inlet buffer tank 2 and the filtrate collecting tank 6, the water automatically overflows to the net surface of the filter screen 5, the filtrate flows into the filtrate collecting tank 6 and is discharged from the water outlet 7, the intercepted granular sludge falls into the sludge collecting tank 9, and the granular sludge is conveyed to the bioreactor through a sludge recovery pump connected with a sludge recovery pipe 10 to realize the recovery and reutilization of the granular sludge; when more flocculent mud is contained in bioreactor discharged water, can cause the jam of certain degree to filtering screen 5's wire side, install the shower nozzle of filtering screen 5 top and carry out the injection washing of continuation to the wire side to improve filtering screen 5's filter effect.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
Example 1: adopt the utility model discloses a device is used for retrieving the granular sludge of anaerobic reactor's production, wherein: the horizontal inclination angle beta of the filtering screen 5 is 30 degrees, the water outlet 7 can be arranged at the bottom of the filtrate collecting tank 6, the filtering screen 5 is made of stainless steel, the bottom surface of the filtering screen is supported by stainless steel bars, the filtering screen is provided with a water inlet 1 and a water outlet 7, and the area ratio of the bottom surfaces of the water inlet buffer tank 2, the filtrate collecting tank 6 and the sludge collecting tank 9 is set to be 1:2: 1. After the recovery of the granular sludge, the recovery ratio of the granular sludge of the anaerobic reactor is 50 volume percent, the total mass of the recovered sludge is 0.21t/d (dry basis), the rest 50 volume percent is flocculent sludge, the recovery and utilization values are not high, and the specific experimental conditions and parameters are shown in table 1.
Example 2: the same device structure as used in example 1, except that: the bioreactor is a denitrification reactor, the horizontal inclination angle of the filtering screen 5 is 40 degrees, and the area ratio of the bottom surfaces of the water inlet buffer tank 2, the filtrate collecting tank 6 and the sludge collecting tank 9 is 1:3: 1. The recovery ratio of the granular sludge in the denitrification reactor is 80 vol%, the total mass of the recovered sludge is 0.256t/d (dried), the remaining 20 vol% is flocculent sludge, and the residual flocculent sludge is the microbes of the mixed bacteria which need to be removed from the bioreactor, and the specific experimental conditions and various parameters are shown in table 1.
Table 1 particle recovery experimental data for example 1 and example 2
Note: the total amount of VSS recovered refers to the total amount of volatile suspended solids, i.e., organic matter, recovered.
Experiments show that the utility model discloses a granule sludge recycling device can gain following beneficial effect: 1. the granular sludge carried in the effluent of the bioreactor can be efficiently intercepted and recovered; 2. flocculent sludge in the bioreactor can be effectively filtered out, and the effective content of granular sludge is improved; 3. the structure is compact, the safety and the reliability are realized, and the operation is convenient; 4. the investment cost is low, the operation cost is avoided, the practicability is high, and the applicability is wide.
Various changes or modifications may be made to the invention without departing from the spirit and principles of the invention, and such changes or modifications are intended to be included within the scope of the invention.
Claims (10)
1. The utility model provides a granule sludge recycling device, includes highly degressive intake zone, muddy water separation district and granule sludge recycling district from the upper reaches to the low reaches in proper order, its characterized in that: the water inlet area, the sludge-water separation area and the granular sludge recovery area are separated by vertical partition plates, and the heights of the partition plates from the upstream to the downstream are sequentially reduced; the mud-water separation area comprises a first clapboard (3) arranged between the water inlet area and the mud-water separation area and a filtering screen (5) arranged on a second clapboard (8) arranged between the mud-water separation area and the granular sludge recovery area, and the horizontal inclination angle of the filtering screen (5) is 25-40 degrees.
2. The granular sludge recycling apparatus according to claim 1, wherein the sludge-water separating area further comprises a spray head (4) disposed above the filter screen (5), a filtrate collecting tank (6) formed by a first partition plate (3) between the water inlet area and the sludge-water separating area and a second partition plate (8) between the sludge-water separating area and the granular sludge recycling area, and a water outlet (7).
3. The granular sludge recycling apparatus according to claim 2, wherein the water inlet zone comprises a water inlet (1) and a water inlet buffer tank (2), wherein the upstream of the water inlet (1) is communicated with the water outlet pipe of the bioreactor, and the downstream of the water inlet (1) is communicated with the water inlet buffer tank (2).
4. The granular sludge recycling apparatus according to claim 1 or 2, wherein the first partition (3) between the water inlet zone and the sludge-water separation zone has a height lower than the outlet conduit of the bioreactor.
5. The granular sludge recycling apparatus according to claim 3, wherein the granular sludge recycling area includes a sludge collection tank (9) and a sludge recycling pipe (10), the sludge recycling pipe (10) communicating with a sludge recycling pump.
6. The granular sludge recycling apparatus according to claim 5, wherein the water inlet zone, the sludge-water separation zone and the granular sludge recycling zone form an integrated box structure, wherein the ratio of the areas of the bottom surfaces of the water inlet buffer tank (2), the filtrate collecting tank (6) and the sludge collecting tank (9) is 1:2-3: 1.
7. The granular sludge recycling apparatus according to claim 1 or 2, wherein the filter screen (5) has a rectangular shape and is made of stainless steel, and the lower portion of the filter screen is made of stainless steel strips as a support member having an area corresponding to the upper portion of the sludge-water separation zone.
8. The granular sludge recycling apparatus of claim 3, wherein the inlet (1) of the inlet water zone is located at the front or both sides of the inlet water buffer tank (2).
9. The granular sludge recycling apparatus according to claim 2, wherein the water outlet (7) of the sludge-water separation zone is located at the bottom or on both sides of the filtrate collection tank (6).
10. The granular sludge recycling apparatus according to claim 6, wherein in the granular sludge recycling zone, a sludge recycling pipe (10) is located at the bottom of the sludge collection tank (9), and the sludge recycling pipe (10) is provided with a flushing line with a valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021659571.3U CN213112700U (en) | 2020-08-11 | 2020-08-11 | Granular sludge recovery device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021659571.3U CN213112700U (en) | 2020-08-11 | 2020-08-11 | Granular sludge recovery device |
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| CN213112700U true CN213112700U (en) | 2021-05-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114380479A (en) * | 2021-12-30 | 2022-04-22 | 江苏博一环保科技有限公司 | Fold spiral shell formula sludge dewatering system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114380479A (en) * | 2021-12-30 | 2022-04-22 | 江苏博一环保科技有限公司 | Fold spiral shell formula sludge dewatering system |
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Effective date of registration: 20231220 Address after: 443003 No. 168, Chengdong Avenue, Yichang, Hubei Patentee after: ANGELYEAST Co.,Ltd. Patentee after: Keke Dala Angel Yeast Co.,Ltd. Address before: 443003 No. 168, Chengdong Avenue, Yichang, Hubei Patentee before: ANGELYEAST Co.,Ltd. |