CN105289053A - Grit chamber and water inlet end structure and tail input water treatment method thereof - Google Patents
Grit chamber and water inlet end structure and tail input water treatment method thereof Download PDFInfo
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- CN105289053A CN105289053A CN201510679129.4A CN201510679129A CN105289053A CN 105289053 A CN105289053 A CN 105289053A CN 201510679129 A CN201510679129 A CN 201510679129A CN 105289053 A CN105289053 A CN 105289053A
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Abstract
The invention discloses a grit chamber and water inlet end structure. The grit chamber and water inlet end structure is characterized in that a water inlet buffer segment is arranged in a sedimentation channel in the water inlet end of a grit chamber, a downward slope is arranged at the bottom of the channel at the front end of the water inlet buffer segment in the water inlet direction to form a water falling area, and the bottom of the channel behind the water falling area is located on the same plane; the positions, in the water inlet buffer segment and behind the water falling area, of lower portions of the adjacent channel walls are horizontally communicated with a reverse water drainage pipeline outwards, and a flow control switch valve is arranged on the reverse water drainage pipeline. The invention further discloses the grit chamber adopting the water inlet end structure and a grit chamber tail input water treatment method achieved through the grit chamber. The tail water of the grit chamber can be treated conveniently, and the water outlet cleanliness of the tail water is guaranteed. The grit chamber has the advantages of being compact in structure, concentralized in occupied area, good in sediment sedimentation effect, and suitable for being used in a micro irrigation system.
Description
Technical field
The invention belongs to water resource and utilize irrigation system field, be specifically related to a kind of setting pot for irrigation system and water inlet end structure and tail water processing method of intaking thereof.
Background technology
China is the country that a water resource is relatively deficient, and freshwater resources total amount only accounts for 6% of global total amount, and occupancy volume per person is only world occupancy volume per person's 1/4; Wherein, northern area freshwater resources are particularly not enough, " water resources in china publication in 2014 " shows, the gross amount of water resources in 6th district, the north only accounts for 17.1% of the whole nation, and its cultivated area is close to 40% of national cultivated area, therefore only greatly develop water-saving agriculture, effectively could alleviate the problem of shortage of water resources.
Promote the effective ways that micro irrigation technology is Developing Water-saving Agriculture.Micro irrigation technology is according to crop demand, by pipe-line system and the douche be arranged on final stage pipeline, by the nutrient needed for water and plant growth with less flow, is evenly accurately transported to a kind of irrigation method of crop root soil.The method is only with the soil near the moistening crop root zone of less flow, and the Surface irrigation moistening with traditional gross area is compared with sprinkling irrigation, has the advantages such as water-saving, saving of labor, effective, strong adaptability.
Typical irrigation system usually by water source, head pivot, water distributing network and douche 4 part form, wherein head pivot comprises the parts such as water pump, controller, control valve, pressure flow measuring instrument, and douche is a kind of utensil by special small outlet, water evenly and being stably transported to crop root.Because the emitter outlet of irrigation system is very little, easily blocked by the silt carried in water, if the husky separating effect of water is bad in use procedure, whole system may be made normally to work, even lost efficacy, thus the sediment charge reduced in slight irrigation water is the key greatly developing micro irrigation technology.
At present, generally adopt the mode adding setting pot between water source and head pivot to solve the husky separation problem of water, wherein horizontal flow type grit chamber because its structure is simple, easy construction and be widely used in irrigation system.But horizontal flow type grit chamber also has the following disadvantages: (1), for obtaining the husky separating effect of good water, horizontal flow type grit chamber is laid longer usually, takes up an area dispersion, sediment settlement limited efficiency; (2) in long distance water transfer process, the floating thing of water-borne generally by artificial treatment, need add operating cost.
In addition, existing water treatment field, also there is a kind of technology of cyclone-type sand precipitating pool, but general cyclone-type sand precipitating pool is all employing entirety is the pond body of cylindrical inner chamber, the mode forming eddy flow tangentially to intake is to realize sedimentation, although the setting pot floor space of this structure is less, but owing to being with rotational flow settlement mode desilting in a monoblock type pond body, water body is in integral-rotation state, mobility is larger, its sediment settlement effect is more limited, be only applicable to the sewage settlement treatment that sediment charge is larger, be not suitable for the sediment settlement process for irrigation system.In addition, all there is tail water and easily carry silt secretly in existing horizontal flow type grit chamber, and overflow-type rotational flow grit chamber, is difficult to the defect of effectively process.
Therefore for the problems referred to above, need to design a kind of novel sand setting pool technology, the process of tail water can be facilitated, and both compact conformations, take up an area and concentrate, there is again good sediment settlement effect, can irrigation system be applicable to.
Summary of the invention
For above-mentioned the deficiencies in the prior art, technical problem to be solved by this invention is: how to provide one can facilitate tail water process, ensure setting pot and the water inlet end structure of tail water clean outlet degree and tail water processing method of intaking thereof, this setting pot is made to have compact conformation, take up an area and concentrate, sediment settlement is effective, is applicable to the feature that irrigation system uses.
In order to solve the problems of the technologies described above, present invention employs following technical scheme (in scheme description, the direction, initial source of current is front, and rightabout is rear):
A kind of setting pot water inlet end structure, it is characterized in that, be provided with one section of water inlet breeze way in the sedimentation irrigation canals and ditches of setting pot water inlet end, the trench bottom of water inlet breeze way front end is provided with a downward slope along water inlet direction and forms drop district, and the trench bottom at drop rear, district is in same plane; The Qu Bi bottom being positioned at drop rear, district adjacent in described water inlet breeze way is also horizontally outward communicated with and is provided with a reverse blow-off line, reverse blow-off line is provided with flow control switch valve.
Like this, setting pot water inlet end structure of the present invention is owing to being provided with drop district, and during use, current are behind drop district, and because the depth of water strengthens, flow velocity slows down, and achieve buffering to be more conducive to silt sedimentation in setting pot.Meanwhile, because irrigation system is interim water inlet, therefore after water inlet end water inlet cut-off, owing to also having certain altitude that part water can be caused to rest in setting pot bottom overboard breach self distance setting pot, be unfavorable for desilting process.Therefore the present invention has also set up reverse blow-off line, when ending when intaking, the effluent switch valve on outlet conduit first can be closed; Then open or open after setting pot sedimentation a period of time waterflow stabilization the flow control switch valve of reverse blow-off line, current are little by little flowed out from reverse blow-off line, clear water more than sand setting layer in setting pot all can be released like this, be beneficial to the desilting of setting pot.Simultaneously because reverse blow-off line flow is little and flow is adjustable, can tail water be avoided better to be taken away by sand setting, ensure the cleannes of tail water water outlet.Reverse blow-off line is arranged at drop adjacent position, rear, district, makes in setting pot course of normal operation, and the water impact by breeze way of intaking makes silt can not be deposited to herein, ensure that the follow-up cleannes oppositely discharged water.
As optimization, be also just horizontally arranged with buffering to drop district and adjust stream wall in the water inlet breeze way at rear, described drop district, buffering is adjusted on stream wall and has been evenly arranged flowing hole, and reverse blow-off line is gentle in drop district to be reconstituted between stream wall.
After such optimization, the current that buffering adjusts stream wall to be used for and drop district down stream forms of short duration acceleration bump against, to consume the kinetic energy that current produce because of down stream, make to adjust the water velocity of stream wall to slow down through buffering, and mediation makes its flow velocity even, plays the effect that buffering adjusts stream, the water velocity entering setting pot after adjustment significantly reduces, like this drop district ease up reconstitute stream wall comprehensive function under, make current in setting pot have dark and slow feature, drastically increase the effect of settling of setting pot.
Simultaneously, after having set up buffering tune stream wall, reverse blow-off line drop district ease up reconstitute stream wall between position, when making normally to discharge water, the water impact in drop district forms impact and turbulent flow after buffering adjusts stream wall above reverse blow-off line, cause silt more in this sedimentation, can not can not affect reverse clean outlet degree.By reverse blow-off line discharge water realize tail water process time, buffering adjusts the existence of stream wall, can play good unhurried current and prolong resistance effect, ensures that silt rests on buffering and adjusts Liu Qiang rear and avoid flowing out from reverse blow-off line better, ensures tail water cleannes.Can a kind of selection be better, flowing hole on buffering tune stream wall is set to the structure that distribution density reduces from top to bottom gradually, more to flow velocity is slower below when flowing out from reverse blow-off line to make tail water, play better and deaden silt to ensure the effect of tail water cleannes.In addition, during enforcement, described reverse blow-off line outer end can directly and outlet conduit connect, the effluent switch valve on outlet conduit is arranged at front, reverse blow-off line junction, and tail water that reverse blow-off line flows out can be made to be directly used in irrigation system pouring process.
The invention also discloses a kind of setting pot, it is characterized in that, setting pot be by one sedimentation irrigation canals and ditches along water inlet direction from outside to inside flat spin shape spiral around the spiral setting pot obtained, spiral setting pot center to have straight down and to stretch out the outlet conduit arranged from spiral setting pot lower horizontal, the outlet conduit of described setting pot is provided with effluent switch valve, the canal wall being positioned at the sedimentation irrigation canals and ditches of spiral setting pot center is provided with overboard breach, be connected with outlet conduit upper end water inlet, described setting pot water inlet end have employed setting pot water inlet end structure as above.
Like this, water inlet desilting time, current from spirality spiral around sedimentation irrigation canals and ditches in process, greatly extend path and the time of current sedimentation when not taking long vacant lot, and then ensure that sediment settlement effect.Meanwhile, because setting pot have employed above-mentioned setting pot water inlet end structure, therefore buffering can be played to improve effect of settling in water inlet process, after water inlet cut-off, effectively can realize the effect that tail water goes out water treatment.
As optimization, described sedimentation irrigation canals and ditches arrange by two the plate body be vertically set up in parallel and form canal wall.Like this, conveniently installation is set.
As optimization, described sedimentation irrigation canals and ditches intake front, one end irrigation channel in be also provided with scum silica frost treating apparatus, described scum silica frost treating apparatus comprises overall ringwise slagging-off belt, slagging-off belt one end is sheathed to be arranged on the lower leather belt roller that is horizontally installed in irrigation channel, the other end is along being set in after water (flow) direction upwards extends on the upper leather belt roller that is positioned at outside irrigation channel, and described lower leather belt roller is connected with actuating unit and it can be leaned on to drive and rotate.
Like this, when scum silica frost treating apparatus uses, drive slagging-off belt to rotate by actuating unit, after scum silica frost impacts slagging-off belt in current, taken away current by slagging-off belt and drop out outside irrigation channel, realizing the effect of descum.
As optimization, uniformly on described slagging-off belt be provided with some leaking holes.Like this, conveniently leak and be beneficial to scum silica frost laminating adhere to slagging-off belt on be pulled away.
As optimization, described actuating unit comprises the waterwheel on the irrigation channel being installed on slagging-off belt front, impeller shaft in the middle part of waterwheel is laterally arranged on the canal wall of irrigation channel both sides rotationally, and make the impeller of waterwheel impeller rotating shaft bottom be positioned at irrigation channel, the impeller on impeller shaft top is exposed to outside irrigation channel, impeller shaft one end horizontal running through is exposed to outside irrigation channel canal wall, lower leather belt roller has transverse direction and runs through the leather belt roller power end be exposed to outside irrigation channel, and impeller shaft is exposed to irrigation channel canal wall lateral ends and leather belt roller power end is in transmission connection.
Like this, impact the rotating shaft of waterwheel impeller impeller by water inlet during water inlet and rotate, and then drive lower leather belt roller to rotate, drive slagging-off belt to run, this simple and ingenious structure and without the need to external energy, only achieve the removing to scum silica frost by current self impact kinetic energy.
As optimization, described leather belt roller power end is coaxially installed with a gear wheel, gear wheel engages with the pinion being arranged on top and arranges, and pinion is by being in transmission connection with the drive pulley dish being arranged on impeller shaft end by movable strap disc and belt of coaxially arranging.
As optimization, also be provided with a scum silica frost in the irrigation channel of slagging-off belt front end and block grid, scum silica frost blocks grid and has one piece of transverse part be horizontally installed on below slagging-off belt front portion, transverse part lower end and irrigation channel bottom connection and upper end and the adjacent setting of slagging-off belt, scum silica frost blocks grid and also has two the side direction portions being positioned at transverse part both sides, the splayed of two side direction portion first half entirety in outer Directional Extension extension forward, first half lower end, side direction portion and irrigation channel bottom connection and front end and irrigation channel madial wall connect, two side direction portions are latter half of is vertically oppositely arranged on slagging-off belt front portion both sides, and latter half of lower surface, two side direction portions and the adjacent setting of slagging-off belt front portion both sides side.
Like this, the scum silica frost of this special construction blocks grid, farthest can tackle and guide scum silica frost to enter on scum silica frost belt to be eliminated out current, improves the effect that scums substantially.
The invention also discloses a kind of setting pot water inlet tail water processing method, it is characterized in that, have employed setting pot as above and realize water inlet, when ending when intaking, first close the effluent switch valve on outlet conduit, then open or open after setting pot sedimentation a period of time waterflow stabilization the flow control switch valve of reverse blow-off line, current are little by little flowed out from reverse blow-off line, by buffering adjust stream wall play unhurried current prolong resistance effect make silt rest on buffering adjust Liu Qiang rear, ensure tail water cleannes, be disposed until tail water flows out.
So just clear water more than sand setting layer in setting pot all can be released, be beneficial to the desilting of setting pot.Can tail water be avoided better to be taken away by sand setting simultaneously, ensure that the cleannes of tail water water outlet.
In sum, the present invention can facilitate the process of setting pot tail water, ensures tail water clean outlet degree; And setting pot has compact conformation, take up an area and concentrate, sediment settlement is effective, is applicable to the advantages such as irrigation system use.
accompanying drawing illustrates:
Fig. 1 is a kind of plan structure schematic diagram that have employed the irrigation system inlet unit of setting pot of the present invention and water inlet end structure.
Fig. 2 is the left view of Fig. 1.
Detailed description of the invention
The present invention is described in further detail for the irrigation system inlet unit that have employed setting pot of the present invention and water inlet end structure below in conjunction with a kind of and accompanying drawing thereof.
Detailed description of the invention: as depicted in figs. 1 and 2, a kind of irrigation system inlet unit structure, comprise spiral setting pot 1, wherein, described spiral setting pot 1 by one sedimentation irrigation canals and ditches 2 along water inlet direction from outside to inside flat spin shape spiral around obtaining, spiral setting pot 1 center to have straight down and to stretch out the outlet conduit 3 arranged from spiral setting pot 1 lower horizontal, the canal wall being positioned at the sedimentation irrigation canals and ditches of spiral setting pot 1 center is provided with overboard breach 4, is connected with outlet conduit 3 upper end water inlet.
Like this, water inlet sand setting time, current from spirality spiral around sedimentation irrigation canals and ditches in process, greatly extend path and the time of current sedimentation when not taking long vacant lot, and then ensure that sediment settlement effect.
Wherein, described sedimentation irrigation canals and ditches 2 arrange by two the plate body be vertically set up in parallel and form canal wall.Like this, conveniently installation is set.
Wherein, described sedimentation irrigation canals and ditches 2 intake front, one end irrigation channel in be also provided with scum silica frost treating apparatus, described scum silica frost treating apparatus comprises overall ringwise slagging-off belt 5, slagging-off belt 5 one end is sheathed to be arranged on the lower leather belt roller that is horizontally installed in irrigation channel, the other end is along being set in after water (flow) direction upwards extends on the upper leather belt roller that is positioned at outside irrigation channel, and described lower leather belt roller is connected with actuating unit and can leans on its driven rotary.Like this, when scum silica frost treating apparatus uses, drive slagging-off belt to rotate by actuating unit, after scum silica frost is impacted slagging-off belt in current, taken away current by slagging-off belt and drop out outside irrigation channel, realizing the effect of descum.
Wherein, uniformly on described slagging-off belt 5 some leaking holes are provided with.Like this, conveniently leak and be beneficial to scum silica frost laminating adhere to slagging-off belt on be pulled away.
Wherein, described actuating unit comprises the waterwheel 6 on the irrigation channel being installed on slagging-off belt front, impeller shaft in the middle part of waterwheel 6 is laterally arranged on the canal wall of irrigation channel both sides rotationally, and make the impeller of waterwheel impeller rotating shaft bottom be positioned at irrigation channel, the impeller on impeller shaft top is exposed to outside irrigation channel, impeller shaft one end horizontal running through is exposed to outside irrigation channel canal wall, lower leather belt roller has transverse direction and runs through the leather belt roller power end be exposed to outside irrigation channel, and impeller shaft is exposed to irrigation channel canal wall lateral ends and leather belt roller power end is in transmission connection.Like this, impact the rotating shaft of waterwheel impeller impeller by water inlet during water inlet and rotate, and then drive lower leather belt roller to rotate, drive slagging-off belt to run, this simple and ingenious structure and without the need to external energy, only achieve the removing to scum silica frost by current self impact kinetic energy.
Wherein, described leather belt roller power end is coaxially installed with a gear wheel 7, gear wheel 7 is arranged with pinion 8 engagement being arranged on top, and pinion 8 is by being in transmission connection with the drive pulley dish being arranged on impeller shaft end by movable strap disc and belt of coaxially arranging.
Wherein, also be provided with a scum silica frost in the irrigation channel of slagging-off belt front end and block grid 9, scum silica frost blocks grid 9 and has one piece of transverse part be horizontally installed on below slagging-off belt front portion, transverse part lower end and irrigation channel bottom connection and upper end and the adjacent setting of slagging-off belt, scum silica frost blocks grid 9 and also has two the side direction portions being positioned at transverse part both sides, the splayed of two side direction portion first half entirety in outer Directional Extension extension forward, first half lower end, side direction portion and irrigation channel bottom connection and front end and irrigation channel madial wall connect, two side direction portions are latter half of is vertically oppositely arranged on slagging-off belt front portion both sides, and latter half of lower surface, two side direction portions and the adjacent setting of slagging-off belt front portion both sides side.Like this, the scum silica frost of this special construction blocks grid, farthest can tackle and guide scum silica frost to enter on scum silica frost belt to be eliminated out current, improves the effect that scums substantially.
Wherein, sedimentation irrigation canals and ditches 2 water inlet end is also provided with one section of water inlet breeze way, and the trench bottom of water inlet breeze way front end is provided with a downward slope 10 along water inlet direction and forms drop district, and the trench bottom at drop rear, district is in same plane.
Such current are behind drop district, and because the depth of water strengthens, flow velocity slows down current backward, achieve buffering like this to be beneficial to silt sedimentation in setting pot better.Better selection is, irrigation channel is connected with sedimentation irrigation canals and ditches water inlet end after being folded to by a right angle section channel, plays the effect of buffering current so better, is conducive to silt sedimentation in setting pot.
Wherein, be also just horizontally arranged with buffering to drop district and adjust stream wall 11 in the water inlet breeze way at rear, described drop district, buffering is adjusted on stream wall 11 and has been evenly arranged flowing hole.
Like this, the current that buffering adjusts stream wall to be used for and drop district down stream forms of short duration acceleration bump against, to consume the kinetic energy that current produce because of down stream, make to adjust the water velocity of stream wall to slow down through buffering, and mediation makes its flow velocity even, plays the effect that buffering adjusts stream, the water velocity that adjustment rear enters setting pot significantly reduces, like this drop district ease up reconstitute stream wall comprehensive function under, make current in setting pot have dark and slow feature, drastically increase the effect of settling of setting pot.
Wherein, the Qu Bi bottom being positioned at drop rear, district adjacent in described water inlet breeze way is also horizontally outward communicated with and is provided with a reverse blow-off line 12, reverse blow-off line 12 is provided with flow control switch valve 13, described outlet conduit 3 is provided with effluent switch valve.
Be because irrigation system is interim water inlet like this, therefore after water inlet end water inlet cut-off, owing to also having certain altitude that part water can be caused to rest in setting pot bottom overboard breach self distance setting pot, be unfavorable for desilting place.
Therefore above-mentioned water inlet end structure can realize effective process of tail water and avoid silt to be taken out of by tail water.Process and the principle of its water inlet tail water process, after having set up reverse blow-off line, when ending when intaking, first can close the effluent switch valve on outlet conduit; Then open or open after setting pot sedimentation a period of time waterflow stabilization the flow control switch valve of reverse blow-off line, current are little by little flowed out from reverse blow-off line, clear water more than sand setting layer in setting pot all can be released like this, be beneficial to the desilting of setting pot.Simultaneously because reverse blow-off line flow is little and flow is adjustable, can tail water be avoided better to be taken away by sand setting, ensure the cleannes of tail water water outlet.Reverse blow-off line is arranged at drop adjacent position, rear, district, makes in setting pot course of normal operation, and the water impact by breeze way of intaking makes silt can not be deposited to herein, ensure that the follow-up cleannes oppositely discharged water.In addition, after having set up buffering tune stream wall, reverse blow-off line drop district ease up reconstitute stream wall between position, when making normally to discharge water, the water impact in drop district forms impact and turbulent flow after buffering adjusts stream wall above reverse blow-off line, cause silt more in this sedimentation, can not can not affect reverse clean outlet degree.By reverse blow-off line discharge water realize tail water process time, buffering adjusts the existence of stream wall, can play good unhurried current and prolong resistance effect, ensures that silt rests on buffering and adjusts Liu Qiang rear and avoid flowing out from reverse blow-off line better, ensures tail water cleannes.Can a kind of selection be better, flowing hole on buffering tune stream wall is set to the structure that distribution density reduces from top to bottom gradually, more to flow velocity is slower below when flowing out from reverse blow-off line to make tail water, play better and deaden silt to ensure the effect of tail water cleannes.In addition, during enforcement, described reverse blow-off line outer end can directly and outlet conduit connect, the effluent switch valve on outlet conduit is arranged at front, reverse blow-off line junction, and tail water that reverse blow-off line flows out can be made to be directly used in irrigation system pouring process.
Claims (5)
1. a setting pot water inlet end structure, it is characterized in that, be provided with one section of water inlet breeze way in the sedimentation irrigation canals and ditches of setting pot water inlet end, the trench bottom of water inlet breeze way front end is provided with a downward slope along water inlet direction and forms drop district, and the trench bottom at drop rear, district is in same plane; The Qu Bi bottom being positioned at drop rear, district adjacent in described water inlet breeze way is also horizontally outward communicated with and is provided with a reverse blow-off line, reverse blow-off line is provided with flow control switch valve.
2. setting pot water inlet end structure as claimed in claim 1, it is characterized in that, also just be horizontally arranged with buffering to drop district in the water inlet breeze way at rear, described drop district and adjust stream wall, buffering is adjusted on stream wall and has been evenly arranged flowing hole, and reverse blow-off line is gentle in drop district to be reconstituted between stream wall.
3. a setting pot, it is characterized in that, setting pot be by one sedimentation irrigation canals and ditches along water inlet direction from outside to inside flat spin shape spiral around the spiral setting pot obtained, spiral setting pot center to have straight down and to stretch out the outlet conduit arranged from spiral setting pot lower horizontal, the outlet conduit of described setting pot is provided with effluent switch valve, the canal wall being positioned at the sedimentation irrigation canals and ditches of spiral setting pot center is provided with overboard breach, be connected with outlet conduit upper end water inlet, described setting pot water inlet end have employed setting pot water inlet end structure as claimed in claim 2.
4. setting pot as claimed in claim 3, it is characterized in that, described sedimentation irrigation canals and ditches arrange by two the plate body be vertically set up in parallel and form canal wall.
5. a setting pot water inlet tail water processing method, is characterized in that, the setting pot that have employed as described in claim 3 or 4 realizes water inlet, when ending when intaking, first closes the effluent switch valve on outlet conduit; Then to open or after setting pot sedimentation a period of time waterflow stabilization, open the flow control switch valve of reverse blow-off line, current are little by little flowed out from reverse blow-off line, unhurried current by cushioning tune stream wall prolongs resistance effect and makes silt rest on buffering tune Liu Qiang rear, ensure tail water cleannes, be disposed until tail water flows out.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510679129.4A CN105289053B (en) | 2015-10-20 | 2015-10-20 | Grit chamber and water inlet end structure and tail input water treatment method thereof |
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| CN201510679129.4A CN105289053B (en) | 2015-10-20 | 2015-10-20 | Grit chamber and water inlet end structure and tail input water treatment method thereof |
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| CN105289053A true CN105289053A (en) | 2016-02-03 |
| CN105289053B CN105289053B (en) | 2017-05-03 |
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| CN201510679129.4A Expired - Fee Related CN105289053B (en) | 2015-10-20 | 2015-10-20 | Grit chamber and water inlet end structure and tail input water treatment method thereof |
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| CN108079622A (en) * | 2017-12-27 | 2018-05-29 | 山东佳星环保科技有限公司 | Efficient sedimentation basin of sewage disposal |
| CN109553191A (en) * | 2018-12-04 | 2019-04-02 | 浙江大学 | Rural area landscape type ecological canal nitrogen phosphorus intercepting system and method |
| CN109553198A (en) * | 2018-12-04 | 2019-04-02 | 浙江大学 | The synchronous interception conversion pool and its method for realizing denitrogenation dephosphorizing |
| CN110478977A (en) * | 2019-09-12 | 2019-11-22 | 济南大学 | A kind of spiral flow is from sand draining type desilting filtering ponds |
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