CN206395938U - The solar energy aeration Vertical Flow Constructed Wetland Systems of strengthened denitrification - Google Patents
The solar energy aeration Vertical Flow Constructed Wetland Systems of strengthened denitrification Download PDFInfo
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- CN206395938U CN206395938U CN201720071848.2U CN201720071848U CN206395938U CN 206395938 U CN206395938 U CN 206395938U CN 201720071848 U CN201720071848 U CN 201720071848U CN 206395938 U CN206395938 U CN 206395938U
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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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- 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
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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- Biological Treatment Of Waste Water (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
The utility model provides a kind of solar energy aeration Vertical Flow Constructed Wetland Systems of strengthened denitrification; gravel layer, packing layer and fine sand protective layer are sequentially provided with pond body; the top of the gravel layer is provided with water distributor; collector pipe is laid on the fine sand protective layer; middle part in described filler layer is provided with aeration tube; some diamond dust micro-hole aerators are connected with the aeration tube, Aeration fan uses the DC fan using live solar power system as power supply.The utility model can form aerobic zone and anoxic zone steady in a long-term in packing layer, corresponding microorganism is set to be in environment steady in a long-term, water is during order flows through aerobic zone and anoxic zone, aerobic biochemical reaction and the hypoxic/anaerobic biochemical reaction including nitrification and denitrification are carried out successively, the overall clean-up effect improved to organic pollution is not only facilitated, but also enhances the denitrification effect of artificial swamp.
Description
Technical field
The utility model is related to a kind of solar energy aeration Vertical Flow Constructed Wetland Systems of strengthened denitrification, category environmental protection and
Technical field of water pollution control.
Background technology
Artificial swamp is a kind of ecological engineering wastewater processing technology, is significantly applied in sewage treatment project in recent years
Promote, but the chemical requirement and BOD that mainly embody Organic Pollution general-circumstances that artificial swamp is directed at present, lead to
Cross a series of biologies such as microorganism, chemically and physically act on, the indexs such as BOD, COD and SS of sewage are lowered, when to total
The removal of nitrogen is often ignored.
Removal of the biological cleaning to nitrogen is divided into ammonification, three processes of nitrification and denitrification, and ammoniation is mainly ammonia
Change bacterium and organic nitrogen is changed into NH4 +- N process, it is very fast that the process is carried out in aerobic environment；Nitrification is mainly nitre
Change bacterium and nitrite bacteria by NH4 +- N step-by-step oxidations are into NO3 -- N process, the process is main to be carried out in aerobic environment, good
Good nitrification is the premise that artificial swamp removes TN；Denitrification is mainly facultative anaerobic bacteria and utilizes NO3 --N、NO2 --N
With NOx as electron acceptor, N is finally reduced into2Process, the process is carried out under anoxic conditions, due to existing artificial swamp
In often lack growth and the metabolism environment of denitrification flora, therefore denitrification is considered as restrict artificial swamp denitrogenation main
Reason.
For example, under prior art, vertical current constructed wetland is filled with air by aeration mode to matrix gap, to increase water
In dissolved oxygen content, be aerobic microbiological build a good living environment, reinforcing wetland to COD, BOD5、NH4 +- N and
TP etc. treatment effect, and the negative effect such as avoid wetland from occurring emitting bad smell, its aeration mode be aeration tube is arranged on it is wet
The bottom on ground is aerated, and air passes through whole packing layer from bottom to top, whole packing layer is all oxygenated, it is possible thereby to ensure
The oxidation effect of aeration, improves the oxygen content of whole wetland, but also greatly reduces the anaerobic zone area of packing layer simultaneously, presses down
The progress of anti-nitration reaction has been made, removal of the artificial swamp to TN is reduced.
To realize anti-nitration reaction, and some organic matters for being difficult to Aerobic Process for Treatment are eliminated by the effect of anaerobic bacteria flora, together
When be aerated cost also for saving, the mode of intermittent aerating is additionally used under prior art, by certain after aeration is stopped
Aerobic biochemical consumption, the concentration of dissolved oxygen is gradually reduced, be difficult in the insufficient region of some aerations even wetland bottom from
The region of right reoxygenation forms certain anoxic even anaerobic state, still, this to produce the anti-nitration reaction under anoxia condition
The aeration mode of batch (-type) can only build " Aerobic-anaerobic " condition in time by intermittent aeration so that nitration reaction and
Batch is carried out anti-nitration reaction in time, and nitric efficiency is high, and also by alternately destruction oxidation flora and anoxic flora
Growing environment, grows especially for its for the denitrification flora for needing long-term cultivation, is often largely constrained
And metabolic effects.In addition, the aerating system of existing artificial swamp also in the presence of column defects：（1）It is aerated using aeration tube, gas
Bulb diameter is big, and the specific area of bubble is small, influences the meltage of oxygen, and equipment is easy to break down in itself, and service life is short, and one
Denier is damaged, it is necessary to change whole piece pipe fitting；（2）The power resources of aerating system are in civil power, it is necessary to possess condition of power supply or laying confession
Electric line, while in being runed there is also the later stage the problem of energy loss.
Utility model content
For the drawbacks described above of prior art, the utility model provides a kind of solar energy aeration vertical current of strengthened denitrification
Artificial wet land system, the system can form aerobic zone and anoxic zone steady in a long-term in packing layer, make at corresponding microorganism
In environment steady in a long-term, water carries out including nitrification and denitrification during order flows through aerobic zone and anoxic zone, successively
Aerobic biochemical reaction inside and hypoxic/anaerobic biochemical reaction, not only facilitate the overall purification improved to organic pollution and imitate
Really, but also the denitrification effect of artificial swamp is enhanced.
The technical solution of the utility model is：A kind of solar energy aeration Vertical Flow Constructed Wetland Systems of strengthened denitrification, bag
Include and packing layer is provided with pond body, the pond body, the top or top of described filler layer are provided with water distributor, the bottom of described filler layer
Or lower section is provided with collector pipe, the middle part in described filler layer is provided with aeration tube, the aeration tube and is connected with some aerators, institute
The air inlet for stating aeration tube connects the output channel of Aeration fan, and thus, air flows upwards during aeration, makes to be located above aeration tube
Packing layer be in aerobic state, aerobe flora grown, and the packing layer below aeration tube cannot be aerated supplement
Air, after oxygen in water is gradually used up, from top to bottom gradually be in anaerobic condition, make facultative flora even anaerobic bacteria flora obtain
To grow, dissolved oxygen concentration of the aeration tube under the specific height and aeration quantity of packing layer, control different height can be controlled,
And then control the microbe species of different height and carry out corresponding biochemical reaction.
The aerator is preferred to use microporous aeration disc, to reduce aeration bubbles volume, increases the contact with water of bubble
Area, increases the solvability of oxygen.
The aerating pore of the microporous aeration disc can be arranged on the front of microporous aeration disc, and the microporous aeration disc is just
Up, thus aeration bubbles are made to flow directly up.
The microporous aeration disc is preferred to use diamond dust microporous aeration disc, the front use of the diamond dust microporous aeration disc
Diamond dust is made, and thus not only obtains required microporous bubble, and resistance is small, and service life is long.
The pond body can be that can be provided with impervious barrier on live structures, the bottom of pond body and side wall.
Preferred plant is implanted with emergent aquactic plant in described filler layer.
Above described filler layer fine sand protective layer can be provided with below covered with gravel layer.
The water distributor can be located at the top of the gravel layer, and the collector pipe can be located at the fine sand protective layer
Above.
The water distributor can be provided with or be connected with the system water inlet for accessing accessing pending water, and the collector pipe goes out
Mouth can connect System drainage passage or access draining collecting-tank.
Some through holes that catchment can be generally distributed with the tube wall that catchments in pond body.
Some collection bleeder pipes are also provided with the pond body, the upper end of the collection bleeder pipe is located at the upper of the gas distribution pipe
Side, lower end, which is extended to, can be provided with some through holes on the bottom of the pond body, the tube wall of the collection bleeder pipe, biochemical reaction is produced
The gas such as carbon dioxide, nitrogen entered by collecting the through hole on deflation tube wall in pipe, and then from the discharge of the upper end mouth of pipe.
Space in the pond body is preferably in the shape of falling truncated rectangular pyramids, and its any horizontal cross-section is rectangular.
Under above-mentioned pond body shape, the aeration tube can include the aeration supervisor extended laterally and some Longitudinal extendings
Aeration branch pipe, the aeration supervisor is located at the longitudinally central location in space in pond body（The central axis for being aerated supervisor is located at pond
On the front and rear plane of symmetry in internal space）, it is connected in the middle part of the aeration branch pipe on the aeration supervisor, between each aeration branch pipe etc.
Away from distribution at grade, the aerator is separately mounted on each aeration branch pipe, is installed on each aeration branch pipe
Aerator quantity it is identical with aerator distribution, each aerator spacing on same aeration branch pipe is equal, this aeration tube construction
It is simple in construction, and aeration is uniform.
The Aeration fan is preferably to use direct current motor driven DC fan.
The dc motor is preferably to install solar power system at the scene as power supply, the solar power generation system
The electric power output cable of system accesses the power access end of the DC fan.
The solar power system generally should be provided with for generate electricity solar panel, the battery for energy storage and
Controller for solar for controlling its inner workings and external output state（Or solar charging discharging controller）, institute
The interconnection mode and control mode for stating solar panel, battery and controller for solar can be according to existing skills
Art.
The system is also provided with switch board, and the controller for solar is arranged in the switch board, the switch board
It is defeated provided with the display and control solar power system electric power that can show the solar power system working condition
Go out the microcomputer time-controlled switch of break-make, the binding post of the battery connects the electric power storage of the controller for solar by cable
Pond connection end.
The beneficial effects of the utility model are：（1）Aerator is laid in the middle part of packing layer, is thus separated packing layer preferably
Oxygen and oxygen and anaerobic zone so that ammonification, nitrification, anti-nitration reaction can be carried out fully in wet land system, improve aeration people
The nitric efficiency of work wet land system and the purification efficiency to a variety of pollutions such as organic matter；（2）Using through high temperature sintering
Superhard diamond dust microporous aeration disc is as aerator, and with resistance to compression, corrosion-resistant, service life is long, is more suitably applied to Manual moist
In ground aeration engineering；（3）Aerator only front, one side outlet, bubble is small, and bubble ascent direction and water body flow direction are just
On the contrary, so adding the contact area of air and water body, the oxygen utilization efficiency of water body is improved；（4）Utilize solar energy
It is power resources that volt, which generates electricity, saves the energy resource consumption of civil power, is not limited by with the presence or absence of civil power.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the planar configuration schematic diagram of the utility model aeration tube；
Fig. 3 is the purification data under a kind of specific embodiment of the present utility model.
Embodiment
Embodiment of the present utility model is described in detail below in conjunction with the accompanying drawings.
As shown in figure 1, solar panel 1 is supported by support 2, the energy is provided for aerating system by photovoltaic generation, it is many
Remaining electricity is stored into battery 6, and controls the disconnected of its electric power output circuit by the microcomputer time-controlled switch 5 in switch board 3
Open, the start and stop of indirect control aerating system, display 4 shows the generating state of solar panel 1, the discharge and recharge of battery 6
The power consumption state of state and DC fan 7.
Using vertical subsurface flow wetland, the specification of pond body 8 is length × wide=50m × 25m, section lower edges depth displacement
For 1.2m, water (flow) direction is from top to bottom.
The internal structure of pond body 8 is followed successively by emergent aquactic plant 9, gravel layer 10, packing layer 12 and fine sand protective layer from top to bottom
16, wherein packing layer 12 is Constructed Wetland For Purifying core treatment area；The internal pipeline of pond body 8 be followed successively by from top to bottom water distributor 11,
Aeration supervisor 13, collector pipe 15 and bleeder pipe 17, wherein water distribution use upper entering and lower leaving, and the water distributor 11 at the top of packing layer is uniform
Water distribution, the collector pipe of packing layer bottom catchments, and is discharged by the delivery port 18 of collector pipe；Aeration supervisor 13 is laid in packing layer
Portion, is equably aerated, aeration plate one side by Buddha's warrior attendant sand aeration plate 14 into wet land system（It is front that gas face, which can be weighed up,）Outlet,
Upwardly, bubble ascent direction is parallel with water (flow) direction and on the contrary, the gas such as N2, CO2 that biological decomposition is produced in wetland for outlet
Discharged by collecting bleeder pipe 17.
As shown in Fig. 2 aeration supervisor 13 is located in the middle of the longitudinal direction of its place plane, it is respectively 25m away from both sides pool wall, with exposure
Gas branch pipe 19 is connected, aeration branch pipe spacing 1m, and uniform on aeration branch pipe to install aeration plate 14, aeration plate spacing 1m is that is, single to expose
The service area of gas disk is 1m2。
As shown in figure 3, to the average removal rate and pH feelings of pollutant during stable after being run three months for above-described embodiment
Condition.The water inlet hydraulic load of single pond body is 0.3m3/（m2·d）, hydraulic detention time is 1.2 days；Aeration 4 hours, expose daily
Gas intensity is drawn according to the calculation of oxygen demand that water pollutant clears up is entered, when water outlet oxygen consumption pollutant concentration is higher than IV class water standards
When properly increase aeration intensity.Wherein to CODCr、NH4 +- N, TN, TP, SS clearance are respectively 59%, 88%, 52%, 81%,
65%, inlet flow-patterm is stable 7.3 or so, and water outlet pH is stable 7.7 or so.
The bottom of the pond body can set impervious barrier, and the impervious barrier can be using the prior art of any suitable and its
His possible technology.As a preferred embodiment, the impervious barrier can be followed successively by bentonite from inside to outside from basal plane
The geotechnological layer of cloth of bed course, HDPE geomembranes, swelling protective soil layer, fine sand protective layer and terylene nonwoven, by the way that terylene nonwoven is geotechnological
Cloth is set with above fine sand protective layer, contributing to provide the Global Macros effect to geomembrane, utilizes terylene nonwoven geotextiles
Globality and toughness, support, homogenize external force/foreign object that gentle punching comes from above, while isolating impurity, reduce fine sand protective layer
Pollution and biochemical reaction, can directly lay gravel layer, packing layer and collecting conduit, bentonite above this geotextiles
Being provided with for protective layer is beneficial to prevent the damage of larger particles or sharp foreign matter to geomembrane in fine sand in actual implementation.Geomembrane
Between seam crossing be preferred to use built-up welding welding, and positioned at upper strata geomembrane welding edge be folded edge, by upper strata geomembrane
When being overlapped on lower floor's geomembrane, certain folding surplus capacity is reserved, flap portion is dug upwards and this geomembrane is folded in
Main part on, the edge formed after folding, edge after folding carries out the built-up welding between lower floor's geomembrane, this
Welding manner is not only convenient and easy, and can effectively ensure the intensity of welding region in practice, and broken in the absence of edge
Damage.
It can be set in the pond body and some gas collections are distributed with some collection standpipes, the side wall of the collection standpipe
Through hole, outside is enclosed with one or more layers nonmetallic silk screen, such as nylon mesh, the lower end extension pond body of the collection standpipe
Bottom, upper end is exposed, and the gas such as carbon dioxide and nitrogen of the formation of pond internal cause biochemical reaction internally pressure can be made
Automatically into collecting standpipe and discharging under, being wrapped in the screen mesh of outside can stop that particulate matter enters standpipe, thus
Allow to use relatively large collection vent hole on standpipe, help to prevent through hole from blocking, increase the service life.
Bottom, middle part and top in the pond body can be provided with online temperature monitor and/or pressure detecting instrument, described
The output access field control cabinet of online temperature monitor/or pressure detecting instrument, is shown by the display of field control cabinet
Show, in order to understand and judge the biochemical reaction situation inside pond body, for example, temperature is to influence an important ring of bacterial activity
Border factor, and pressure then points out in pond water-permeable and air permeable performance and thus biochemical reaction problem that may be present, field control cabinet
It is interior the output of temperature/pressure detector to be accessed into dependency number according to needing to set related data processing circuit or device
According to process circuit or device, with the display processing needed for carrying out and other processing, for example, data processing circuit or device can be set
There is warning output, in the temperature/pressure data fit alert if of detection, the alarm lamp connected by warning output
And/or alarm buzzer is alarmed.
It can be fixedly mounted above the pond body provided with foot bridge longitudinally and/or laterally, the two ends of the foot bridge
On pool wall or ground, thus, management and maintainer can go to and closely be checked and upkeep operation on bridge.
Removal of this artificial swamp to nitrogen is divided into ammonification, wherein three steps of nitrification and denitrification, aminating reaction
It is that organic nitrogen is changed into NH by amonifying bacteria in aerobic environment4 +- N, nitration reaction be nitrobacteria in aerobic environment by NH4 +- N changes into NO3 -- N, anti-nitration reaction be denitrifying bacteria in anaerobic environment by NO3 -- N is reduced into N2, eventually through wetland
Discharge duct is discharged, so as to complete denitrogenation.The utility model adds artificial aeration's reinforcing on Traditional Man wetland basis and arranged
Apply, be aerated in the middle part of wet land filler layer, so construct aerobic region, aerobic area domain successively from top to bottom in wet land filler layer
And anaerobic zone, water body from top to bottom flows through packing layer, and oxygen in water can be gradually decreased with water (flow) direction.The wetland first half
In the aeration reinforcing measure divided, using micropore Buddha's warrior attendant sand aeration plate as aerator, its bubble diameter is small, bubble ascent direction
It is parallel with water (flow) direction and on the contrary, add the contact area with water body, oxygen utilization rate is enhanced, improves in water body and dissolves
Oxygen concentration, is conducive to ammonification and nitrification, by more organic nitrogens and NH4 +- N changes into NO3 -- N, is that anti-nitration reaction is carried
For more NO3 --N；It is following in the middle part of wetland not to be aerated measure, occur in the aerobic area domain at middle part and the anaerobic zone of bottom anti-
Nitration reaction, by NO3 -- N is reduced into N2, finally discharge wet land system.In addition, superhard diamond dust microporous aeration disc burns through high temperature
Knot is formed, resistance to compression, long lifespan, reduces later stage replacement frequency.
Disclosed in the utility model it is each preferably with optional technological means, unless otherwise indicated and a preferred or optional skill
Art means are that outside the further restriction of another technological means, can form some different technical schemes in any combination.
Claims (10)
1. filler is provided with a kind of solar energy aeration Vertical Flow Constructed Wetland Systems of strengthened denitrification, including pond body, the pond body
Layer, the top or top of described filler layer are provided with water distributor, and the bottom or lower section of described filler layer are provided with collector pipe, the filler
Middle part in layer, which is provided with aeration tube, the aeration tube, is connected with some aerators, the air inlet connection aeration of the aeration tube
The output channel of blower fan.
2. the system as claimed in claim 1, it is characterised in that the aerator uses microporous aeration disc, the microporous aeration disc
Aerating pore be arranged on the front of microporous aeration disc, the microporous aeration disc it is face-up.
3. system as claimed in claim 2, it is characterised in that the microporous aeration disc uses diamond dust microporous aeration disc, described
The front of diamond dust microporous aeration disc is made of diamond dust.
4. the system as claimed in claim 1, it is characterised in that covered with gravel layer above described filler layer, is arranged below thin
Planted in husky protective layer, described filler layer and be implanted with emergent aquactic plant.
5. system as claimed in claim 4, it is characterised in that the water distributor is located at the top of the gravel layer, described to catchment
Pipe is located above the fine sand protective layer, and the water distributor is provided with or be connected with the system water inlet for accessing accessing pending water,
The outlet connection System drainage passage or access draining collecting-tank of the collector pipe.
6. system as claimed in claim 5, it is characterised in that some collection bleeder pipes are additionally provided with the pond body, the collection is put
The upper end of tracheae is located at the top of the aeration tube, and lower end extends to the bottom of the pond body.
7. the system as claimed in claim 1, it is characterised in that the space in the pond body is in the shape of falling truncated rectangular pyramids, its any level
Section is rectangular, and the aeration tube includes the aeration branch pipe of the aeration supervisor extended laterally and some Longitudinal extendings, the exposure
Gas supervisor, which is located in the middle part of the longitudinally central location in space in pond body, the aeration branch pipe, to be connected on the aeration supervisor, respectively
At grade, the aerator is separately mounted on each aeration branch pipe aeration branch pipe equidistantly distributed, each exposure
The aerator quantity installed on gas branch pipe is identical with aerator distribution, and each aerator spacing on same aeration branch pipe is equal.
8. the system as claimed in claim 1, it is characterised in that the Aeration fan is to use direct current motor driven direct current
Blower fan.
9. system as claimed in claim 8, it is characterised in that the dc motor is to install solar power generation at the scene
System is power supply, and the electric power output cable of the solar power system accesses the power access end of the DC fan, described
Solar power system is provided with for the solar panel generated electricity, the battery for energy storage and for controlling its internal work
The controller for solar of state and external output state.
10. system as claimed in claim 9, it is characterised in that be additionally provided with switch board, the controller for solar is arranged on institute
State in switch board, the switch board, which is provided with, can show display and the control of the solar power system working condition
The microcomputer time-controlled switch of solar power system electric power output break-make, the binding post of the battery connects institute by cable
State the battery connection end of controller for solar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720071848.2U CN206395938U (en) | 2017-01-20 | 2017-01-20 | The solar energy aeration Vertical Flow Constructed Wetland Systems of strengthened denitrification |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720071848.2U CN206395938U (en) | 2017-01-20 | 2017-01-20 | The solar energy aeration Vertical Flow Constructed Wetland Systems of strengthened denitrification |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108002519A (en) * | 2017-10-30 | 2018-05-08 | 上海市政工程设计研究总院（集团）有限公司 | A kind of all standing aerating system |
| CN108203157A (en) * | 2017-12-27 | 2018-06-26 | 上海太和水环境科技发展股份有限公司 | A kind of rain dirt mixed-flow pumping plant is discharged pretreatment system |
| CN110407327A (en) * | 2019-07-29 | 2019-11-05 | 华南农业大学 | A kind of micro- method for exposing high efficient vertical flow constructed wetland and submerged plant ecological pond combined system and its handling tail water |
-
2017
- 2017-01-20 CN CN201720071848.2U patent/CN206395938U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108002519A (en) * | 2017-10-30 | 2018-05-08 | 上海市政工程设计研究总院（集团）有限公司 | A kind of all standing aerating system |
| CN108002519B (en) * | 2017-10-30 | 2023-11-17 | 上海市政工程设计研究总院（集团）有限公司 | Full-coverage aeration system |
| CN108203157A (en) * | 2017-12-27 | 2018-06-26 | 上海太和水环境科技发展股份有限公司 | A kind of rain dirt mixed-flow pumping plant is discharged pretreatment system |
| CN110407327A (en) * | 2019-07-29 | 2019-11-05 | 华南农业大学 | A kind of micro- method for exposing high efficient vertical flow constructed wetland and submerged plant ecological pond combined system and its handling tail water |
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