CN108975518A - The purification device of high debirs content landscape water body - Google Patents
The purification device of high debirs content landscape water body Download PDFInfo
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- CN108975518A CN108975518A CN201810898228.5A CN201810898228A CN108975518A CN 108975518 A CN108975518 A CN 108975518A CN 201810898228 A CN201810898228 A CN 201810898228A CN 108975518 A CN108975518 A CN 108975518A
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- debirs
- purification device
- landscape water
- water
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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
-
- 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
-
- 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
- C02F3/02—Aerobic processes
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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
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Microbiology (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Biotechnology (AREA)
- Botany (AREA)
- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
This case is related to a kind of purification device of high debirs content landscape water body, comprising: pedestal with groove, the boss being staggered, photosynthetic bacteria feeding box, the filter packing of honeycomb coaly, protecting cover, filter pulp, drainage hole；The purification device of high debirs content landscape water body of the invention is aesthetic in appearance, and rebuilding construction and installation cost are low, can combine together with landscape water body, does not destroy whole landscape；Plant in boss makes landscape water body have bigger landscape molding space；By the staggered designs of groove body inner convex platform, flow velocity and the direction of water are controlled, makes water curvilinear motion in the device, substantially prolongs the path of water bleeder, increases water and plant, the contact area of microorganism and filter packing and time, enhances the clean-up effect of water.
Description
Technical field
The invention belongs to water treatment fields, and in particular to a kind of purification device of high debirs content landscape water body.
Background technique
In recent years as more and more, increasing landscape water body such as commercial circle, office space, high-end residential, park needs
It asks, how effectively, economically handles and maintain the water quality of landscape water body at a problem anxious to be resolved.Exploring landscape water
In the approach of processing method, it experienced from the circulating filtration method for imitating swimming-pool water processing, to the dispensing bacterium for imitating sewage treatment
Kind method and aeration, until current people have appreciated that the aquatic ecosystem for establishing and improving landscape water body has landscape water body
Self-purification function is only the most economical effective solution approach of landscape water process.
The research of country's ecological method landscape water process is mostly concentrated on to biological species type and group in wild water body at present
The investigation of ratio is fallen, various water plants is then planted in proportion in landscape water body according to investigation result, launches strain and float
Move about object, fish and zoobenthos.
The growth of water plant can absorb the nutrients such as a large amount of nitrogen phosphorus in water body.But the use of underwater lawn also has its limitation
Property, because underwater lawn photosynthesis needs sunlight, water body needs a degree of transparent before launching underwater lawn
Degree；Meanwhile stable bacterium colony can also decompose the organic matter in water, and can convert part to the virose substance of water body harmless
Or it can be by the substance of water plant safe utilization.
Unpolluted water body has a perfect water ecosystem in wild environment, they are in long-term history
It is gradually formed in evolution process, it, can if can establish it in landscape water body is similar to the ecosystem perfect in natural environment
Fully achieve the self-cleaning of landscape water；But since most scenic water places are small, the ecosystem is single, it is complete to be difficult to be formed
Animals and plants so that microorganism participate in decomposing, purifying chain, often put into the artificial ecology purification system that huge cost is made
Ideal effect can be just played, and maintenance cost is higher.
For majority spends the landscape water body manager of high cost and maintenance cost without inability, by appropriate, simple
Single manual intervention establishes plant and microorganism stabilization with lower cost and benign circulation is more real method.
In view of this, need it is a kind of manufacture, installation transformation, maintenance etc. the controllable economical and effective high organic waste of costs
The purification device or treating method of object content landscape water body.
Summary of the invention
The object of the present invention is to provide a kind of energy simplicity, the device of high-efficient purification landscape water body.
It is a further object to provide a kind of lower manufactures, the high debirs content scape of cost of installation and maintenance
See the purification device of water body.
In order to solve the above-mentioned technical problem, the invention discloses a kind of purification of high debirs content landscape water body dresses
It sets, comprising:
Pedestal is set to landscape water body top or edge, generally has the straight panel or bent plate of groove body, the groove body opening
Upward；
Boss is hollow rectangle or semicircle, there is several, staggered to be uniformly set to groove body two sidewalls；It is described
Photosynthetic bacteria feeding box is equipped in the boss of part；The plateau sidewall with photosynthetic bacteria feeding box, which opens up, several has diameter not
Through-hole greater than 2mm；Boss is not only enhanced the structural strength of the present apparatus, also functions to support to plant therein is planted in
With the effect of protection, plant is enable to stablize growth, both facilitated the purification of water, also makes landscape water body more full of green；And light
Close bacterium can be carried out the resolution process of organic pollutant under conditions of illumination anaerobism and aerobic no light, be arranged in boss
Photosynthetic bacteria feeding box launches strain liquid in right amount, and the through-hole setting on boss makes strain also can slowly be consumed release, effectively
Reduce injected volume and the frequency.
Filter packing is layed in groove body for honeycomb coaly, honeycomb through-hole direction and the water (flow) direction in pedestal
Unanimously；The material component of the filter packing include: foam grain 10-20wt%, iron powder 4-5wt%, plant fiber or
Chemical fibre 5-10wt%, anthracite 20-30wt%, diatom ooze 20-30wt%, cinder 10-15wt%, cement 10-30wt%；
Its production method are as follows: cinder and cement are added water and stirred uniformly in proportion, put into iron powder, anthracite, diatom ooze, foamed plastics
Grain stirs evenly, then puts into carbonization maize cob meal and plant fiber or chemical fibre, stirs evenly, mixture is poured into mold,
Honeycomb coaly, natural drying or hot-air seasoning under room temperature are made under 0.5-2kg/cm2 pressure；Plant fiber or chemical fibre,
Anthracite and cement, which mix, is used as binder and filler, and firm and loose porous skeleton is provided for filter packing；Foam plastic
The stabilization porous structure that material particle, carbonization maize cob meal, diatom ooze are compounded to form has preferable filter effect, while also can be
Attachment etc. of stablizing of nitrobacteria provides good environment, after iron powder rustization, not only contributes to the conglomerate of organic pollutant,
Also there is certain promotion to the capacity of decomposition of microorganism；
Protecting cover is hard material, is matched with the groove body of pedestal, is installed on above groove body；Protecting cover seals filter packing
Loaded in groove body, protecting filter packing not by artificial destruction, while also making present apparatus structural strength higher, it is whole more aesthetically pleasing,
The design that adaptability is carried out to base shape, is aided with certain incrustation, the present invention can be made to combine together with landscape water body, no
Destroy the ornamental value of landscape water body entirety.
Drainage hole is set to described protecting cover one end；
Filter pulp is set to the protecting cover other end；It is connected with space in the groove body；
The purification device continuous service on daytime of the high debirs content landscape water body, the operation of night intermittence.So
The aerobic breakdown and anaerobic decomposition for making microorganism alternately, make to purify more efficient, thorough.
Preferably, intake pump and draining pump are respectively equipped at the filter pulp and drainage hole, the landscape water is from intake pump
After drawer to filter pulp, after filter cotton initial filter, filter packing filtering, water is returned in landscape from drainage hole extraction with draining pump.
Preferably, it after the landscape water is from water pump drawer to pedestal, is outflowed back in landscape from drainage hole.
Preferably, the plant fiber or chemical fibre can be reeled off raw silk from cocoons by waste and old clothing, discarded fishing net and other fabrics or
Chopping is made.
Preferably, the protecting cover is grid or latticed transparent or translucent material.Transparent or translucent material has
Conducive to the growth of water plant, such as structural strength or manufacturing cost reason are considered, using opaque material, suitably increasing grid
On gap width it is also possible.
Preferably, the foam grain can from discarded hard or semi-rigid foamed plastics packaging through broken and
?.
Preferably, the foamed plastics partial size is not more than 0.2mm.
Preferably, the filter packing should be replaced every 1-2, and the filter pulp should be scrubbed once at least every 3 days.
Preferably, the small-sized ornamental plant of cleaning water body effect can be planted in the boss or, especially to crawl raw or have
There is the ornamental plant of aerial root to be preferred.
Preferably, water plant can be planted in the gap of the filter packing.
Preferably, the purification device of the high debirs content landscape water body has after coming into operation one month
Stable water body purification ability.The regular hour is needed by the foundation of the microbiological treatment flora of representative of nitrobacteria, hereafter
Stable benign cycle can be formed.
The purification device of high debirs content landscape water body of the invention, include at least the following beneficial effects:
1, aesthetic in appearance, rebuilding construction and installation cost are low, can combine together with landscape water body, do not destroy whole landscape；
Plant in boss makes landscape water body have bigger landscape molding space.
2, also there is good filtration to the water body such as rainwater containing a large amount of suspended particulates, make landscape water body that rain can be used
The make-up water source as landscape water body such as sanitary sewage that water, part are gently polluted.
3, by the staggered designs of groove body inner convex platform, flow velocity and the direction of water are controlled, makes water curvilinear motion in the device, greatly
The path of water bleeder is extended greatly, is increased water and plant, the contact area of microorganism and filter packing and time, is enhanced
The clean-up effect of water；The setting of photosynthetic bacteria feeding box can effectively reduce the injected volume of photosynthetic bacteria strain liquid, reduce cost.
4, using the industrial and agricultural products of low cost as the main raw material(s) of filter packing, waste utilization is low in cost, easily
In processing, production cost is reduced, it is environmentally friendly.
Detailed description of the invention
Fig. 1 is the schematic perspective view of pedestal.
Fig. 2 is the schematic diagram of base structure with filler.
Fig. 3 is the structural schematic diagram for covering protecting cover rear base.
Specific embodiment
Below by embodiment, the present invention is described in further detail, to enable those skilled in the art referring to specification
Text can be implemented accordingly.
Such as " have " it should be appreciated that used herein, "comprising" and " comprising " term are not precluded one or more
The presence or addition of a other elements or combinations thereof.
Embodiment 1
As shown in Figure 1, 2, 3,
A kind of purification device of high debirs content landscape water body, comprising:
Pedestal 1 is set to landscape water body top or edge, generally has the straight panel or bent plate of groove body 101, the groove body
It is opening up；
Boss 2 is hollow rectangle or semicircle, there is several, staggered to be uniformly set to 101 two sidewalls of groove body；
Being opened up in the part boss equipped with the plateau sidewall described in photosynthetic bacteria feeding box 201 with photosynthetic bacteria feeding box several has
Diameter is not more than the through-hole 202 of 2mm；
Filter packing 3 is layed in groove body for honeycomb coaly, honeycomb through-hole direction and the water flow side in pedestal
To consistent；The material component of the filter packing includes: 15 parts of foam grain, 5 parts of iron powder, plant fiber or chemical fibre
10 parts, 20 parts of anthracite, 20 parts of diatom ooze, 10 parts of cinder, 20 parts of cement；
Protecting cover 4 is hard material, is matched with the groove body of pedestal, and 101 top of groove body is installed on；
Drainage hole 5 is set to described 4 one end of protecting cover；
Filter pulp 6 is set to 4 other end of protecting cover；It is connected with space in the groove body 101；
The purification device continuous service on daytime of the high debirs content landscape water body, the operation of night intermittence.
Be respectively equipped with intake pump 601 and draining pump 501 at the filter pulp 6 and drainage hole 5, water from 601 drawer of intake pump extremely
After filter pulp 5, after 6 initial filter of filter cotton, filter packing 3 filter, water is returned in landscape from drainage hole extraction with draining pump 501,
Draining pump 501 should preferentially extract upper water.
The plant fiber or chemical fibre, which can be reeled off raw silk from cocoons or be shredded by waste and old clothing, discarded fishing net and other fabrics, to be made.
The protecting cover 4 is grid or latticed transparent or translucent material.
The foam grain can be obtained from discarded hard or semi-rigid foamed plastics packaging through broken.
The foamed plastics partial size is not more than 0.2mm.
The filter packing 3 should be replaced every 1-2, and the filter pulp should be scrubbed once at least every 3 days.
The small-sized ornamental plant of cleaning water body effect can be planted in the boss 2 or, especially to crawl raw or there is aerial root
Ornamental plant be preferred.
Water plant can be planted in the gap of the filter packing 3.
The purification device of the high debirs content landscape water body has stable water body after coming into operation one month
Detergent power.
Embodiment 2
Filter packing production method in embodiment are as follows: its production method are as follows: add water and stir cinder and cement in proportion
Uniformly, iron powder, anthracite, diatom ooze, foam grain are put into stir evenly, then puts into carbonization maize cob meal and plant fiber
Or chemical fibre, it stirs evenly, mixture is poured into mold, honeycomb coaly is made under 1kg/cm2 pressure, is done naturally under room temperature
Dry or hot-air seasoning；
Embodiment 3
Construction and installation method:
One, it can be mounted directly and be set up in above landscape water body wall inner wall or wall.
Two, the ditch for being suitable for pedestal and installing is dug out at landscape water body edge, and groove body 1 is placed in hole, limes marginis is filled and led up；It will
Filter packing is sequentially laid in groove body, is put into water plant, covers groove body square 7；Kind of upper selected plant, bankets in boss 2
Compacting, to play the role of being compacted firm banking 1；It should be noted that the part boss for placing photosynthetic bacteria feeding box
Without banketing.
Embodiment 4
Initial stage application method:
It after installing, opens water pump and draws water out of landscape water body, guarantee that water energy did not had all filter packings, block water outlet
Hole is impregnated 24 hours, is controlled water feeding of water pump amount, so that water feeding of water pump and device is gone out water energy and reach balance；Adjusting water exit when necessary
Hole height and size；If in addition water feeding of water pump is excessively limpid, content of organics is too low, stablizes effective microbiologic population and establishes
Then take more time；Before the effective microbiologic population of stabilization does not set up, it is possible to increase photosynthetic bacteria injected volume is to guarantee to purify
Effect.
Embodiment 5
After the present apparatus is run 35 days, in the case where launching photosynthetic bacteria, its clean-up effect is surveyed:
The water sample biochemical oxygen demand (BOD) (BOD) extracted out of landscape water body is 1465mg/L, and the water sample extracted from apopore is raw
Changing oxygen demand (BOD) is 67mg/L, has dropped 95% or more.
Embodiment 6
When rainy season, in the device of ground rainwater importing embodiment 1, will measure the concentration of suspension for not filtering rainwater is
479mg/L, and the water sample concentration of suspension acquired near apopore is 38mg/L, can be used as the make-up water source of landscape water body.
Embodiment 7
Filter pulp should be scrubbed once for every 1-3 days；
After a period of use, the surface adhesive layer such as discovery filter packing is thicker, influences filtering and clean-up effect, can incite somebody to action
Filtrate taking-up is scrubbed, and when flushing pays attention to that high pressure water not can be used, and can not repeatedly be scrubbed in the short time, and primary scrub is thorough as far as possible
Bottom.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and embodiment shown and described herein.
Claims (10)
1. a kind of purification device of high debirs content landscape water body characterized by comprising
Pedestal is set to landscape water body top or edge, generally has the straight panel or bent plate of groove body, groove body opening court
On；
Boss is hollow rectangle or semicircle, there is several, staggered to be uniformly set to groove body two sidewalls；The part
Photosynthetic bacteria feeding box is equipped in boss；The plateau sidewall with photosynthetic bacteria feeding box, which opens up, several has diameter to be not more than
The through-hole of 2mm；
Filter packing is layed in groove body for honeycomb coaly, honeycomb through-hole direction and the water (flow) direction one in pedestal
It causes；The material component of the filter packing includes: foam grain 10-20wt%, iron powder 4-5wt%, plant fiber or change
Learn fiber 5-10wt%, anthracite 20-30wt%, diatom ooze 20-30wt%, cinder 10-15wt%, cement 10-30wt%；Its
Production method are as follows: cinder and cement are added water and stirred uniformly in proportion, put into iron powder, anthracite, diatom ooze, foam grain
It stirs evenly, then puts into carbonization maize cob meal and plant fiber or chemical fibre, stir evenly, mixture is poured into mold,
Honeycomb coaly, natural drying or hot-air seasoning under room temperature are made under 0.5-2kg/cm2 pressure；
Protecting cover is hard material, is matched with the groove body of pedestal, is installed on above groove body；
Drainage hole is set to described protecting cover one end；
Filter pulp is set to the protecting cover other end；It is connected with space in the groove body；
The purification device continuous service on daytime of the high debirs content landscape water body, the operation of night intermittence.
2. the purification device of high debirs content landscape water body as described in claim 1, which is characterized in that the filter pulp and
Intake pump and draining pump are respectively equipped at drainage hole, the landscape water is from after intake pump drawer to filter pulp, through filter cotton initial filter, mistake
After filtering filler filtering, water is returned in landscape from drainage hole extraction with draining pump.
3. the purification device of high debirs content landscape water body as described in claim 1, which is characterized in that the plant is fine
Dimension or chemical fibre, which can be reeled off raw silk from cocoons or be shredded by waste and old clothing, discarded fishing net and other fabrics, to be made.
4. the purification device of high debirs content landscape water body as described in claim 1, which is characterized in that the protecting cover is
Grid or latticed transparent or translucent material.
5. the purification device of high debirs content landscape water body as described in claim 1, which is characterized in that the foam plastic
Material particle can be obtained from discarded hard or semi-rigid foamed plastics packaging through broken.
6. the purification device of high debirs content landscape water body as described in claim 1, which is characterized in that the foam plastic
Expect that partial size is not more than 0.2mm.
7. the purification device of high debirs content landscape water body as described in claim 1, which is characterized in that the filtering is filled out
Material should be replaced every 1-2, and the filter pulp should be scrubbed once at least every 3 days.
8. the purification device of high debirs content landscape water body as described in claim 1, which is characterized in that in the boss
The small-sized ornamental plant of cleaning water body effect can be planted or, being preferred especially with raw or with aerial root the ornamental plant that crawls.
9. the purification device of high debirs content landscape water body as described in claim 1, which is characterized in that the filtering is filled out
Water plant can be planted in the gap of material.
10. the purification device of high debirs content landscape water body as described in claim 1, which is characterized in that the height has
The purification device of machine waste content landscape water body has stable water body purification ability after coming into operation one month.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810898228.5A CN108975518B (en) | 2018-08-08 | 2018-08-08 | Purifier of high organic waste content landscape water body |
| PCT/CN2019/078639 WO2020029586A1 (en) | 2018-08-08 | 2019-03-19 | Purifying device for landscape water with high content of organic waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810898228.5A CN108975518B (en) | 2018-08-08 | 2018-08-08 | Purifier of high organic waste content landscape water body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108975518A true CN108975518A (en) | 2018-12-11 |
| CN108975518B CN108975518B (en) | 2020-05-19 |
Family
ID=64555741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810898228.5A Active CN108975518B (en) | 2018-08-08 | 2018-08-08 | Purifier of high organic waste content landscape water body |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108975518B (en) |
| WO (1) | WO2020029586A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115490400A (en) * | 2022-10-11 | 2022-12-20 | 长江生态环保集团有限公司 | Constructed wetland clean system suitable for mountain region |
Citations (4)
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|---|---|---|---|---|
| CN101186385A (en) * | 2007-12-14 | 2008-05-28 | 华南理工大学 | Organism activated adsorption aeration sewage treating and water reusing method |
| CN102515356A (en) * | 2011-11-28 | 2012-06-27 | 杜建强 | Saturated filter bed for treating polluted water body |
| CN103755035A (en) * | 2014-02-10 | 2014-04-30 | 天津市水利科学研究院 | Surface flow wetland water purification system with combined-type flows and water purification method |
| CN107382025A (en) * | 2017-07-10 | 2017-11-24 | 华中农业大学 | A kind of Pig farm wastewater processing filler, polynary coupling technique and system |
-
2018
- 2018-08-08 CN CN201810898228.5A patent/CN108975518B/en active Active
-
2019
- 2019-03-19 WO PCT/CN2019/078639 patent/WO2020029586A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101186385A (en) * | 2007-12-14 | 2008-05-28 | 华南理工大学 | Organism activated adsorption aeration sewage treating and water reusing method |
| CN102515356A (en) * | 2011-11-28 | 2012-06-27 | 杜建强 | Saturated filter bed for treating polluted water body |
| CN103755035A (en) * | 2014-02-10 | 2014-04-30 | 天津市水利科学研究院 | Surface flow wetland water purification system with combined-type flows and water purification method |
| CN107382025A (en) * | 2017-07-10 | 2017-11-24 | 华中农业大学 | A kind of Pig farm wastewater processing filler, polynary coupling technique and system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115490400A (en) * | 2022-10-11 | 2022-12-20 | 长江生态环保集团有限公司 | Constructed wetland clean system suitable for mountain region |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108975518B (en) | 2020-05-19 |
| WO2020029586A1 (en) | 2020-02-13 |
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