CN207566985U - A kind of eutrophication closes water body ex-situ repair system - Google Patents
A kind of eutrophication closes water body ex-situ repair system Download PDFInfo
- Publication number
- CN207566985U CN207566985U CN201721525994.4U CN201721525994U CN207566985U CN 207566985 U CN207566985 U CN 207566985U CN 201721525994 U CN201721525994 U CN 201721525994U CN 207566985 U CN207566985 U CN 207566985U
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- Prior art keywords
- water body
- ditches
- irrigation canals
- dystopy
- eutrophication
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- 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.)
- Expired - Fee Related
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 95
- 238000012851 eutrophication Methods 0.000 title claims abstract description 23
- 238000011066 ex-situ storage Methods 0.000 title claims abstract description 17
- 230000008439 repair process Effects 0.000 title claims abstract description 17
- 230000002262 irrigation Effects 0.000 claims abstract description 51
- 238000003973 irrigation Methods 0.000 claims abstract description 51
- 238000012545 processing Methods 0.000 claims abstract description 41
- 239000000945 filler Substances 0.000 claims abstract description 27
- 239000003814 drug Substances 0.000 claims abstract description 6
- 230000003247 decreasing effect Effects 0.000 claims abstract description 4
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical class O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 22
- 239000003818 cinder Substances 0.000 claims description 15
- 238000005192 partition Methods 0.000 claims description 10
- 238000005273 aeration Methods 0.000 claims description 8
- 239000002360 explosive Substances 0.000 claims description 8
- 229910021536 Zeolite Inorganic materials 0.000 claims description 7
- 239000010457 zeolite Substances 0.000 claims description 7
- 239000000523 sample Substances 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000012856 packing Methods 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 2
- 238000000746 purification Methods 0.000 abstract description 4
- 241000196324 Embryophyta Species 0.000 description 13
- 239000010410 layer Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical compound [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 description 4
- 239000006096 absorbing agent Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005189 flocculation Methods 0.000 description 4
- 230000016615 flocculation Effects 0.000 description 4
- 230000000050 nutritive effect Effects 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 241000195493 Cryptophyta Species 0.000 description 2
- 240000003826 Eichhornia crassipes Species 0.000 description 2
- 244000207740 Lemna minor Species 0.000 description 2
- 235000006439 Lemna minor Nutrition 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 2
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 235000001855 Portulaca oleracea Nutrition 0.000 description 2
- 244000046101 Sophora japonica Species 0.000 description 2
- 235000010586 Sophora japonica Nutrition 0.000 description 2
- 239000005422 algal bloom Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- -1 nitrogen phosphorus Chemical class 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- 238000006213 oxygenation reaction Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 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 1
- 238000010521 absorption reaction Methods 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000001038 titanium pigment Substances 0.000 description 1
Classifications
-
- 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
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Water Treatment By Sorption (AREA)
- Cultivation Of Plants (AREA)
Abstract
The utility model discloses a kind of eutrophication to close water body ex-situ repair system, irrigation canals and ditches are handled including being set on at least two-stage dystopy on the outside of closing water body, every grade of dystopy processing irrigation canals and ditches overhead height is successively decreased successively by outside to closing water body to be set in drop, elevator pump between closing water body and outermost dystopy processing irrigation canals and ditches is set, is included in the dystopy processing irrigation canals and ditches：The denitrogenation filler unit being filled in dystopy processing irrigation canals and ditches；Floating bed plant unit at the dystopy processing irrigation canals and ditches water surface；And the emergent dosing unit of medicament is added into denitrogenation filler unit.In the utility model, water body will be closed by elevator pump to be pumped into outermost dystopy processing irrigation canals and ditches, treated, and water body flows automatically successively into next stage processing irrigation canals and ditches, in every level-one irrigation canals and ditches, it is acted synergistically by denitrogenation filler unit, floating bed plant unit and emergent dosing unit and carries out purified treatment, final purification water outlet is flowed back in closing water body.
Description
Technical field
The utility model is related to technical field of sewage, and in particular to a kind of eutrophication closing water body showering system
System.
Background technology
In recent years, it is beautifying city living environment, has built many big and small artificial lakes, but it is most of such
Lake for it is static or the poor closing slow flow water bodies of mobility, and easily by resident living sewage, house refuse, ground rain
The pollution of water runoff etc. causes body eutrophication, and algal bloom finally causes black and odorous water, not only loses artificial
The Landscaping function in lake has also seriously affected the living environment of surrounding resident.
For body eutrophication treatment technology mainly there is flocculating setting, filtration, purification, ecological floating island, dredging to dredge,
The methods of bottom is aerated, but be difficult to reach expected treatment effect using these prior arts.Wherein flocculation sedimentation be directly to
Medicament is added in water body, algae cohesion is made to sink under water, water body can be made to restore transparency, but the algae to sink under water quickly
Polluter can be discharged again again after rotting, and body eutrophication cannot be effected a radical cure；Ecological floating island utilizes plant absorption water body
In the nutritive salt such as nitrogen phosphorus, while there is preferable landscape effect, but acted on for sudden algal bloom limited；Dredging is dug
The methods of mud, bottom aeration, can purify water in a short time, but quantities is larger, and processing cost is high.
The method for repairing eutrophication water is combined using materialization technology and biotechnology at present and achieves preferable effect,
Such as the Chinese invention patent document of Publication No. CN 103951144A discloses processing unit and the side of a kind of nutrient laden waste water
Method, including water absorber, magnetic flocculation device, disc unit reoxygenation device, floating bed device, the water absorber extracts eutrophication and gives up
The deposit of surface layer of water bed mud and its Interstitial Water；The magnetic flocculation device is connected with water absorber, and water absorber is extracted
Eutrophic wastewater forms magnetic floc sedimentation；The disc unit reoxygenation device side is connected with magnetic flocculation device, and opposite side is with floating
Bed apparatus is connected, and disc unit reoxygenation device is made of disk mechanism, magnetic kind retracting device and nanometer microbubble generator, magnetic
Disc mechanism carries out Magneto separate to magnetic floc sedimentation, forms magnetic sludge, recycles magnetic kind retracting device recycling magnetic kind；Nanometer is micro-
Purified eutrophic wastewater is fused into gas-liquid homogeneous flow by bubble generator；The floating bed device refers to water plant ecology
Floating bed.
Utility model content
The utility model provides a kind of eutrophication closing water body ex-situ repair system, and apparatus structure is simple, treatment effect
It is good.
A kind of eutrophication closes water body ex-situ repair system, which is characterized in that including being set on the outside of closing water body extremely
Few two-stage dystopy processing irrigation canals and ditches, every grade of dystopy processing irrigation canals and ditches overhead height is successively decreased successively by outside to closing water body side to be set in drop
It puts, closes and elevator pump is set between water body and outermost dystopy processing irrigation canals and ditches, include in the dystopy processing irrigation canals and ditches：
The denitrogenation filler unit being filled in dystopy processing irrigation canals and ditches；
Floating bed plant unit at the dystopy processing irrigation canals and ditches water surface；
And the emergent dosing unit of medicament is added into denitrogenation filler unit.
In the utility model, centered on closing water body, dystopy handles irrigation canals and ditches height by increasing successively except interior, at dystopy
Reason irrigation canals and ditches, which can be arranged on closing water body side, can also surround closing water body setting, by elevator pump will close water body be pumped into it is outermost
In the dystopy processing irrigation canals and ditches of side, treated, and water body flows automatically successively into next stage processing irrigation canals and ditches, in every level-one irrigation canals and ditches, by denitrogenation
Filler unit, floating bed plant unit and emergent dosing unit synergistic effect carry out purified treatment, and final purification water outlet is flowed back to
It closes in water body.
Preferably, several surface aeration machines are equipped in the dystopy processing irrigation canals and ditches.Control in irrigation canals and ditches Dissolved Oxygen in Water 2~
3mg/L, surface aeration machine will not disturb the packing layer of trench bottom, it is possible to reduce the loss of filler while oxygenation.
Preferably, divided between adjacent dystopy processing irrigation canals and ditches and between most inner side dystopy processing irrigation canals and ditches and closing water body by partition wall
Every the height outermost dystopy processing irrigation canals and ditches of partition wall successively decrease successively to water body is closed.
It is further preferred that the width of dystopy processing irrigation canals and ditches is 1~2m, depth is 0.5~1m, every on the partition wall
It is spaced 20~40m and one drop-down section is set, drop height is 0.1~0.2m
The influent side of dystopy processing irrigation canals and ditches is conducive to flow and is voluntarily flowed from water inlet to water outlet, often higher than water outlet side
One drop-down section is set every 20~40m, drop height is 0.1~0.2m, can increase oxygen in water.Under aerobic condition,
The mineralized nitrogen that zeolite adsorbs can be nitrate nitrogen by nitrifier, realize zeolite parsing, zeolite is made to have the energy for absorbing ammonia nitrogen again
Power.The titanium pigment in the precipitable water of Ca, Fe, Al in cinder, and under anaerobic, filler easily releases phosphorus, increases molten in water
Oxygen is solved, is conducive to be immobilized the stability of phosphorus.
The utility model utilizes microbial consumption filling adsorption using surface aeration and method oxygenation into water of drop
Nutritive salt improves filler utilization rate, and will not generate the phenomenon that nutritive salt adsorbed is lost in water body again.
Preferably, the denitrogenation filler unit includes being filled in the blotter of dystopy processing trench bottom and positioned at rubble
Cinder and modified zeolite mixed filler layer above bed course.
The utility model is taken off for the nutritive salt such as the excess nitrogen phosphorus of body eutrophication are caused using zeolite, gangue etc.
Nitrogen filler carries out quick adsorption, and removal polluter, floating bed plant unit further enhance water body self-purification ability in the short time,
Landscape will not be impacted, while improve the stability of the system denitrogenation dephosphorizing；Emergent dosing branch pipe(tube), for sudden
Water body deteriorates, and can quickly be handled by adding medicament, improve the impact resistance of system.
It is further preferred that the height of the blotter is 10~20cm, the cinder and zeolite mixed filler layer
Highly it is 20~30cm.
It is further preferred that the grain size of rubble is 20~30mm, the grain size of cinder is 5~20mm, the grain size of modified zeolite
For 1~5mm, modified zeolite is filled in cinder gap, and the volume ratio of modified zeolite and cinder is 1:4~2:3.
In denitrogenation filler unit, for rubble as setting cushion in irrigation canals and ditches bottom surface, grain size is 20~30mm, highly for 10~
20cm；Gangue is layed on rubble, and grain size is 5~20mm, is highly 20~30cm；Modified zeolite filter material layer grain size is 1
~5mm, modified zeolite are filled in cobble layer gap, and modified zeolite is 1 with cinder volume ratio:4~2:3.Modified zeolite and coal
Slag can quickly absorb the nitrogen phosphorus in water body as filler, avoid water body that wawter bloom phenomenon occurs.
Preferably, the emergent dosing unit includes：
Explosive box；
It is inserted into the denitrogenation filler unit and equally distributed several emergent dosing branch pipes；
Connect the dosing manifold of explosive box and emergent dosing branch pipe；
And the dosing pump on dosing manifold.
Uniformly distributed in denitrogenation filler unit to have several emergent dosing branch pipe(tube)s, explosive box is placed on bank, when closing water
Body change of water quality is larger, when handling load more than denitrogenation filler, adds nitrification strain, flocculant, suction into water using dosing pump
Attached dose is waited medicaments, increases ex-situ repair system impact resistance.
The floating bed plant unit is suspended in the closing water body and the showering irrigation canals and ditches water surface, strengthens the denitrogenation of the system
Efficiency.Preferably, the floating bed plant unit includes Chinese scholartree leaf duckweed, Eichhornia crassipes and at least one of the lotus that swims.Floating bed plant
Using nitrogen phosphorus in water body etc. as nutrient, it is purified water body.
Preferably, it is equipped with on-line monitoring probe in the closing water body and in showering irrigation canals and ditches.
It is automatically controlled to realize, it is further preferred that being additionally provided with controller, all on-line monitoring probes access the control
In device, all pumps access and are controlled by the controller.
Description of the drawings
Fig. 1 is the structure diagram of the utility model.
Reference numeral is as follows shown in figure：
1- outermost layers dystopy handles irrigation canals and ditches 2- partition wall 3- elevator pumps
4- surface aeration machine 5- dosing pump 6- floating bed plants
7- meet an urgent need dosing branch pipe 8- explosive boxs 9- closing water body
10- cinders mix 11- blotters with modified rubble
Close packing layer
Specific embodiment
As shown in Figure 1, a kind of eutrophication closing water body ex-situ repair system, including around the 9 periphery setting of closing water body
Several grades of dystopys processing irrigation canals and ditches (in attached drawing 1 by taking two-stage as an example), between adjacent dystopy processing irrigation canals and ditches and at innermost layer dystopy
Reason irrigation canals and ditches are separated with closing water body by partition wall 2, and the height of partition wall is successively decreased successively by outermost dystopy processing irrigation canals and ditches to water body is closed,
It is set in drop, is conducive to water body and flows automatically successively dystopy processing irrigation canals and ditches on the inside of process from outermost dystopy processing irrigation canals and ditches, it is final to return
Into closing water body.
Be respectively provided in each dystopy processing irrigation canals and ditches surface aeration machine 4, denitrogenation filler unit, floating body plant unit and it is emergent plus
Prescription member, denitrogenation filler unit include upper and lower two layers of filler, and lower floor is blotter 11, upper strata is that cinder is mixed with modified zeolite
Packing layer 10, for rubble as setting cushion in irrigation canals and ditches bottom surface, grain size is 20~30mm, is highly 10~20cm；Gangue is laid with
On rubble, grain size is 5~20mm, is highly 20~30cm；Modified zeolite filter material layer grain size is 1~5mm, and modified zeolite is filled out
It fills in cobble layer gap, modified zeolite is 1 with cinder volume ratio:4~2:3.
Floating body plant unit is made of several floating body plants 6, at the water surface, floating body plant for Chinese scholartree leaf duckweed, Eichhornia crassipes and
Swim at least one of lotus.
Emergent dosing unit includes explosive box 8, dosing manifold, the dosing pump 5 on dosing manifold and is uniformly distributed
In the emergent dosing branch pipe 7 in denitrogenation filler unit, dosing branch pipe of meeting an urgent need is inserted into underfilling, dosing manifold connection explosive boxs
With corresponding emergent dosing branch pipe 7.
Surface aeration machine 4 is set in dystopy processing irrigation canals and ditches at the water surface.
The width of dystopy processing irrigation canals and ditches is 1~2m, and depth is 0.5~1m, and setting one at interval of 20~40m on partition wall falls
Water section, drop height are 0.1~0.2m.
Closing water body 9 is pumped into outermost dystopy by elevator pump 3 and handles in irrigation canals and ditches 1, handles ditch by dystopys at different levels successively
Canal purified treatment, it is final to flow back into certainly in closing water body 9.
For convenience of control, setting probe can also be monitored on-line in closing water body and in dystopy at different levels processing irrigation canals and ditches, and
Controller is set, and all on-line monitorings probe is accessed in the controller, and all pumps are also intervened and are controlled by the control
Device.
The foregoing is merely the specific implementation case of the utility model patent, but the technical characteristic of the utility model patent is simultaneously
Not limited to this, any those skilled in the relevant art in the field of the utility model, all cover by the variation or modification made
Among the scope of the claims of the utility model.
Claims (10)
1. a kind of eutrophication closes water body ex-situ repair system, which is characterized in that including being set on the outside of closing water body at least
Two-stage dystopy handles irrigation canals and ditches, and every grade of dystopy processing irrigation canals and ditches overhead height is successively decreased successively by outside to closing water body side to be set in drop
It puts, closes and elevator pump is set between water body and outermost dystopy processing irrigation canals and ditches, include in the dystopy processing irrigation canals and ditches：
The denitrogenation filler unit being filled in dystopy processing irrigation canals and ditches；
Floating bed plant unit at the dystopy processing irrigation canals and ditches water surface；
And the emergent dosing unit of medicament is added into denitrogenation filler unit.
2. eutrophication closing water body ex-situ repair system according to claim 1, which is characterized in that the dystopy handles ditch
Several surface aeration machines are equipped in canal.
3. eutrophication closing water body ex-situ repair system according to claim 1, which is characterized in that adjacent dystopy handles ditch
Separated between canal and between most inner side dystopy processing irrigation canals and ditches and closing water body by partition wall, the height outermost dystopy processing ditch of partition wall
Canal successively decreases successively to water body is closed.
4. eutrophication closing water body ex-situ repair system according to claim 3, which is characterized in that the dystopy handles ditch
The width of canal is 1~2m, and depth is 0.5~1m, sets a drop-down section, drop height at interval of 20~40m on the partition wall
For 0.1~0.2m.
5. eutrophication closing water body ex-situ repair system according to claim 1, which is characterized in that the denitrogenation filler list
Member includes being filled in the blotter of dystopy processing trench bottom and the cinder above blotter is mixed with modified zeolite
Packing layer.
6. eutrophication closing water body ex-situ repair system according to claim 5, which is characterized in that the blotter
It is highly 10~20cm, the height of the cinder and zeolite mixed filler layer is 20~30cm.
7. eutrophication closing water body ex-situ repair system according to claim 5, which is characterized in that the grain size of rubble is 20
~30mm, the grain size of cinder is 5~20mm, and the grain size of modified zeolite is 1~5mm, and modified zeolite is filled in cinder gap, changes
Property zeolite and cinder volume ratio be 1:4~2:3.
8. eutrophication closing water body ex-situ repair system according to claim 1, which is characterized in that the emergent dosing list
Member includes：
Explosive box；
It is inserted into the denitrogenation filler unit and equally distributed several emergent dosing branch pipes；
Connect the dosing manifold of explosive box and emergent dosing branch pipe；
And the dosing pump on dosing manifold.
9. eutrophication closing water body ex-situ repair system according to claim 1, which is characterized in that in the closing water body
And on-line monitoring probe is equipped in showering irrigation canals and ditches.
10. eutrophication closing water body ex-situ repair system according to claim 9, which is characterized in that controller is additionally provided with,
All on-line monitoring probes are accessed in the controller, and all pumps access and are controlled by the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721525994.4U CN207566985U (en) | 2017-11-15 | 2017-11-15 | A kind of eutrophication closes water body ex-situ repair system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721525994.4U CN207566985U (en) | 2017-11-15 | 2017-11-15 | A kind of eutrophication closes water body ex-situ repair system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207566985U true CN207566985U (en) | 2018-07-03 |
Family
ID=62690479
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721525994.4U Expired - Fee Related CN207566985U (en) | 2017-11-15 | 2017-11-15 | A kind of eutrophication closes water body ex-situ repair system |
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|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110407399A (en) * | 2019-04-29 | 2019-11-05 | 南京南化建设有限公司 | A kind of shallow-layer rich water processing method |
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2017
- 2017-11-15 CN CN201721525994.4U patent/CN207566985U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110407399A (en) * | 2019-04-29 | 2019-11-05 | 南京南化建设有限公司 | A kind of shallow-layer rich water processing method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180703 |