CN210656606U - Ecological purifier of surface runoff - Google Patents
Ecological purifier of surface runoff Download PDFInfo
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- CN210656606U CN210656606U CN201922264818.5U CN201922264818U CN210656606U CN 210656606 U CN210656606 U CN 210656606U CN 201922264818 U CN201922264818 U CN 201922264818U CN 210656606 U CN210656606 U CN 210656606U
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Abstract
The utility model relates to an ecological purifier of surface runoff, hold back the purification module including one or more, every holds back the purification module and includes that the runoff holds back ditch module, cyclone separation module, play ditch module, biomembrane purification module. The utility model fully utilizes the limited space of the water along the bank, utilizes the runoff interception ditch module in the vertical radial flow direction to realize that the small water quantity can be intercepted by the runoff interception ditch module and is discharged into the water after being purified by the purification module, and the runoff interception ditch module can be overflowed during the large water quantity to be directly discharged into the water, and has the modular combination function, thereby being particularly suitable for reducing the non-point source pollution at the periphery of the hardening and vertical water revetment; the utility model discloses all kinds of suspended solids are effectively got rid of to usable density difference to strengthen the atmosphere reoxygenation ability, be favorable to promoting biomembrane purification module degradation effect, prevent that biomembrane purification module from blockking up. The process can be completed completely by the hydrodynamic force of the runoff, no machinery is required to be installed, and the operation energy consumption is low.
Description
Technical Field
The utility model belongs to the technical field of the environmental protection, concretely relates to ecological purifier of surface runoff.
Background
Currently, with the rapid promotion of urbanization in China, the public puts higher demands on the living environment, so that the elimination of black and odorous water and the development of ecological restoration of surface water become core tasks of water pollution treatment in recent years. According to the general consensus of 'treating water and land first', source control and sewage interception become the primary tasks for improving the water environment quality. For typical point sources such as sewage outlets of various urban residents and industrial enterprises, measures such as perfecting a sewage collecting pipe network, newly building a centralized sewage treatment plant (station) or a dispersive sewage treatment device and the like are generally adopted, and the effect can be displayed. In contrast, incipient rainfall also results in highly contaminated surface runoff in urban streets, industrial plant areas and agricultural land, which is much more difficult to perform pollutant-intercepting purification. The common method is that facilities such as an energy dissipation ditch, an ecological planting zone, an ecological bank zone and the like are sequentially built from a catchment source (such as farmlands, streets and the like) to a water body along the bank and are respectively used for settling silt, degrading organic matters, removing nitrogen and phosphorus nutritive salts and the like. The above method is difficult to be adopted for an area with insufficient ecological space, especially an old city river channel or a small lake (pond) which generally adopts a vertical hardening revetment. This results in areas with higher intensities of non-point source pollution entering rivers (lakes).
In order to solve the problems, the functions of polluted runoff collection, suspended matter removal, soluble substance degradation and the like need to be integrated in a local space, the irregularity of rainfall is fully adapted, and the aims of intercepting and purifying initial rainwater, smoothly entering rivers (lakes) by continuous rainfall, no use of moving machinery (reducing maintenance requirements in dry seasons), low operation energy consumption, easy formation of ecological landscape and the like are fulfilled. This is not possible under the existing technical conditions. Therefore, how to innovate the design of the surface runoff purification device and the use method thereof, the green and efficient advantages of ecological engineering are fully exerted, and the device becomes a key point for effectively preventing and controlling the non-point source pollution around the water body.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that an ecological purifier of surface runoff is provided, it can satisfy and realize holding back the purification in finite space, and purification efficiency is high, the processing energy consumption is low, need not to use rotary motion machinery, and the routine maintenance is convenient.
For solving the technical problem, the utility model discloses take following technical scheme:
the utility model provides an ecological purifier of surface runoff, the ecological purifier of surface runoff include one or more and hold back purification module, every hold back purification module include the runoff hold back the ditch module, with the runoff hold back the terminal cyclone separation module that is linked together of ditch module, with the play ditch module that the cyclone separation module is linked together, with play ditch module one or more biomembrane purification module that is linked together.
The utility model discloses in, the object that the ecological purifier of surface runoff held back is not only limited to the initial stage rainwater, still including irrigating the outer drainage etc. that the overflow produced.
The utility model discloses in, the number of holding back purification module sets up according to the length of revetment and the throughput of purification module, when a plurality of, can a plurality of purification modules set up side by side, and the initiating terminal that ditch module was held back to runoff of a whirl separation module and another adjacent purification module does not communicate.
The utility model discloses in, every minimum interception ability of holding back purification module calculates preceding 10~20 min's initial stage rainfall with local annual average rainfall.
Preferably, the water revetment is located runoff intercept one side of ditch module, the ditch module of play with the biomembrane purification module set up side by side and be located the runoff intercept the opposite side of ditch module to can be as far as possible reduce surface runoff ecological purification device's area.
Preferably, the inner side wall of the runoff interception ditch module is tightly attached to the side wall of the water body revetment, and the top end of the inner side wall of the runoff interception ditch module is flush with the height of the water body revetment, so that surface runoff can be ensured to flow into the runoff interception ditch module; the runoff intercept ditch module the lateral wall with the inside wall of outlet canal module and the inside wall sharing of biomembrane purification module, just the runoff intercept the lateral wall of ditch module and be higher than the water revetment to can avoid the water to pour into the runoff intercept the ditch module, and, local surface runoff volume surpasss the runoff intercept ditch module drainage ability time, the runoff can be followed the lateral wall (overflow weir) top of runoff intercept the ditch module and discharged the water.
Further preferably, the outer side wall of the runoff intercepting ditch module is 0.1-0.3 m higher than the inner side wall of the runoff intercepting ditch module.
Preferably, the runoff intercepting ditch module comprises an intercepting ditch with an inner side wall and an outer side wall, a soil layer paved on the bottom surface of the intercepting ditch, a honeycomb pore plate paved on the soil layer, and grass-type plants planted on the soil layer, wherein the tail end of the intercepting ditch is connected with the rotational flow separation module in a tangential direction. By paving the honeycomb pore plate and planting the grass-type plants on the soil layer, the scouring of water flow to the soil layer can be slowed down.
In the utility model, the grass plants are calamus, loosestrife, bamboo leaves, and the like.
Further preferably, the gradient of the bottom surface of the interception ditch from the starting end to the tail end is 0.0003-0.001, so that the water flow in the interception ditch flows to the cyclone separation module conveniently.
Preferably, the cyclone separation module comprises a first part which is positioned at the upper part and is in a hollow cylinder shape, a second part of which the upper end part is connected with the lower end part of the first part and is in an inverted circular truncated cone shape, a third part of which the upper end part is connected with the lower end part of the second part and is in an inverted circular truncated cone shape, a pipeline connected with the third part, and a sand discharge pump connected with the pipeline; the height-diameter ratio of the first part is 0.3-0.6: 1, and the top of the first part is higher than the high water level of the water body; the height of the second part is 0.2-0.3 times of the height of the first part, and the included angle between the side wall of the second part and the upper bottom surface is 30-35 degrees; the height of the third portion is 0.8-1 times of the height of the first portion, and an included angle between the side wall of the third portion and the upper bottom surface is 60-70 degrees.
Further preferably, the top of the first portion is flush with the water revetment.
Further preferably, the pipeline is located in the center of the cyclone separation module and is vertically arranged, the pipe diameter of the pipeline is not less than 200mm, and when the third part has more deposits such as sand, the deposits such as sand can be discharged through the pipeline and the sand discharge pump.
Further preferably, the outlet channel module comprises an outlet channel and a gate, wherein the outlet channel is respectively communicated with the cyclone separation module and the biofilm purification module, and the gate is arranged on the outlet channel; the width of the water outlet channel is 2-4 times of the width of the interception channel of the runoff interception channel module, the opening height of the water outlet channel is 50-70% of the height of the first part, the top of the water outlet channel is flush with the top of the first part, and the central axis of the water outlet channel is intersected with the axial lead of the first part. In the flood period (high water level), the flood control function of the revetment can be guaranteed to the gate that sets up, prevents that rivers from flowing backward for the device's routine maintenance is comparatively simple.
Preferably, when there are a plurality of the biofilm purification modules, the plurality of the biofilm purification modules are sequentially arranged in series.
Preferably, the biofilm purification module comprises a descending well, an ascending well communicated with the descending well through the lower part, biological fillers filled in the descending well and the ascending well, emergent aquatic plants planted on the tops of the fillers, a drainage weir arranged between the descending well and the ascending well and the top of the drainage weir is flush with the high water level of the water body, and an effluent weir arranged on the upper part of the descending well; the width of the down-flow well and the width of the up-flow well are not less than the width of the water outlet channel module, the filling rate of the biological filler in the down-flow well is 60-100%, the filling thickness is not less than 1.2m, and the top of the biological filler in the down-flow well is flush with the normal water level of the water body; the filling rate of the biological filler in the upflow well is 60-100%, the filling thickness is not less than 1m, the top of the biological filler in the upflow well is higher than the low water level of the water body, and the weir top of the water outlet weir is lower than the low water level of the water body.
The utility model discloses to the dissolubility pollutant in the initial stage rainwater, baffling about realizing through downing well and rising well makes its and biofilm on biofilm and the emergent aquatic plant's root system fully contact and obtain purifying. According to the water level of the water body, the height of the water outlet weir is optimally designed, so that in a non-rainfall period, natural water can enter the downcast well and the upcast well and carry in nutrients for maintaining the activity of the biological membrane system, and the daily maintenance of the device is simpler.
The utility model discloses planted emergent aquatic plant in biomembrane purification module, this can not only effectively strengthen pollutant degradation efficiency, still help promoting the ecological of water revetment, through constructing ecological landscape, the dual function that full play ecological protection and environment beautified.
More preferably, the biological filler comprises a frame, zeolite and/or volcanic rock which are filled in the frame and have a filling rate of 60-80%, and a biological film, wherein the thickness of the biological film is 0.5-10 mm, the bacterial community structure of the biological film is that pseudomonas accounts for 30-50% of the total number of bacteria, and the rest is symbiotic bacteria related to the biological film.
In the utility model, the emergent aquatic plants include reed, water onion, canna, religious flower, arrowhead, etc.
The utility model also provides an ecological purification method of surface runoff, which adopts the ecological purification device of surface runoff to purify the surface runoff,
when the flow velocity in the runoff catch groove module is not more than 2m/s, the total hydraulic retention time of the surface runoff in the cyclone separation module is not less than 30s, and the total hydraulic retention time of the surface runoff in the biological membrane purification module is not less than 50 s;
when the water level of the water body is below the high water level, the gate of the water outlet channel module is opened; when the water level of the water body is at or above the high water level, the gate of the water outlet channel module is closed.
The utility model provides a low water level, normal water level and high water level reach through the water level of statistics this area calendar year.
Due to the implementation of the above technical scheme, compared with the prior art, the utility model have the following advantage:
the utility model discloses make full use of water coastal limited space, utilize the runoff to hold back the ditch module of perpendicular runoff direction, realize that the small water yield can be held back by the runoff holds back the ditch module and discharge into the water after purification treatment of purification module, can overflow the runoff to hold back the ditch module and directly discharge into the water during the large water yield, avoided the rainfall "pollution in earlier stage can not hold up, the later stage volume can not discharge greatly" the problem, and possess the modularization combined function, especially suitable for being used for the perpendicular, the regional source pollution reduction of hardening water revetment periphery;
the utility model discloses a runoff is held back ditch module and is combined together with the whirl separation module, and all kinds of suspended solids are effectively got rid of to usable density difference to strengthen the atmosphere reoxygenation ability, be favorable to promoting biomembrane purification module degradation effect, prevent that biomembrane purification module from blockking up. More importantly, the process can be completed completely by the self hydrodynamic force of the runoff, no machinery is required to be installed, and the operation energy consumption is low.
Drawings
FIG. 1 is a top view of an embodiment of an entrapment purification module;
FIG. 2 is a top view of an embodiment of a runoff catch gutter module;
FIG. 3 is a cross-sectional view of an embodiment of a runoff catch gutter module;
FIG. 4 is a side view of an embodiment of an entrapment purification module;
FIG. 5 is a cross-sectional view of a cyclone separation module, an outlet channel module and a biofilm purification module of the retentate purification module of example 1;
FIG. 6 is a cross-sectional view of the cyclone separation module, the raceway module, and the biofilm purification module of the entrapment purification module of example 2;
wherein, 1, runoff interception ditch module; 2. a cyclone separation module; 3. a water outlet channel module; 4. a biofilm purification module; 11. intercepting a ditch; 12. a soil layer; 13. a honeycomb pore plate; 14. a grass-type plant; 15. an overflow weir; 21. a first part; 22. a second section; 23. a third section; 24. a pipeline; 31. a water outlet channel; 32. a gate; 41. a flow well is lowered; 42. a rising well; 43. biological fillers; 44. emerging plants; 45. a drainage weir; 46. and (4) an effluent weir.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to the following embodiments. In the examples, the specific experimental methods were not specified, and the experimental methods were performed in accordance with national standard methods and conditions.
Example 1
The specific parameter settings of the purification apparatus employed in this embodiment are as follows:
a section of vertical hardening revetment of a certain shallow lake of the long triangle in China is provided with a plurality of residential areas and commercial areas along the shore, and the pavement is a cement ground, so that the space for ecological reconstruction is very limited. Aiming at surface runoff formed by early rainfall, 3 groups of interception and purification modules are arranged along the shore. The convergence distance of the rain water is measured by 5 km, the local annual rainfall is about 1100 mm, and the COD in the early rain waterCrThe ammonia nitrogen and suspended matter concentrations are respectively 90-210 mg/L, 1-5 mg/L and 400-600 mg/L.
Each entrapment purification module comprises: 1 runoff interception ditch module 1, 1 cyclone separation module 2, 1 water outlet channel module 3 and 1 biomembrane purification module 4.
The terminal intercommunication and the rivers of whirl separation module 2 and runoff interception ditch module 1 enter whirl separation module 2 with the tangential direction, go out ditch module 3 and whirl separation module 2 and be linked together, and biomembrane purification module 4 is linked together with play ditch module 3, and biomembrane purification module 4 sets up side by side in one side of runoff interception ditch module 1 with play ditch module 3.
The runoff intercepting ditch module 1 comprises an intercepting ditch 11 with an inner side wall and an outer side wall, a soil layer 12 laid on the bottom surface of the intercepting ditch 11, a honeycomb pore plate 13 laid on the soil layer 12, and grass plants 14 planted on the soil layer 12.
The cyclone separation module 2 comprises a first part 21 which is positioned at the upper part and is a hollow cylinder, a second part 22 which is connected with the lower end part of the first part 21 at the upper end part and is in an inverted circular truncated cone shape, a third part 23 which is connected with the lower end part of the second part 22 at the upper end part and is in an inverted circular truncated cone shape, a pipeline 24 connected with the third part 23, and a sand discharge pump connected with the pipeline 24. The first portion 21, the second portion 22, and the third portion 23 constitute a cyclone separator.
The top of the first part 21 is flush with the revetment, the diameter of the cross section is 2.4 m, the height is 1m, the height of the second part 22 is about 0.3m, the included angle α of the bottom edge is 30 degrees, the height of the third part 23 is 1m, the included angle β of the bottom edge is 70 degrees, the pipeline 24 is vertically arranged at the central position of the cyclone separation body, and the pipe diameter is 200 mm.
The outlet channel module 3 comprises an outlet channel 31 communicated with the first part 21 of the cyclone separation module 2 and the biomembrane purification module 4 respectively, and an electric gate 32 arranged on the outlet channel 31.
The width of the water outlet channel 31 is 1.5m, the opening height is 0.7 m, the length is about 1.2m, the top of the water outlet channel 31 is flush with the top of the first part 21, and the central axis of the water outlet channel 31 intersects with the axis of the rotational flow separation body.
The biofilm purification module 4 comprises 1 descending well 41 communicated with the outlet channel 31, 1 ascending well 42 communicated with the descending well 41 through the lower part, biological fillers 43 filled in the descending well 41 and the ascending well 42, emergent aquatic plants 44 planted on the top of the fillers, a drainage weir 45 arranged between the descending well 41 and the ascending well 42 and the top of the drainage weir is flush with the high water level of the water body, and an outlet weir 46 arranged on the upper part of the descending well 41.
The descending well 41 and the ascending well 42 are separated by a partition plate, the bottom of the partition plate is provided with a pore channel to form the communication between the descending well 41 and the ascending well 42, the pore channel is 1.5m wide and 0.5 m high; a drainage weir 45 is formed at the top of the partition plate, and the weir top of the drainage weir 45 is 0.1 m lower than the revetment; the top of the downwash well 41 and the upwash well 42 are open, and the cross section is square with a side length of 1.5 m.
The filling rate of the high-permeability biological filler 43 filled in the interior of the downcast well 41 is about 100%, the filling thickness is 2.0 m, and the top of the filler is flush with the normal water level of the river channel. The filling rate of the high-permeability biological filler 43 filled in the upflow well 42 is about 80 percent, and the filling thickness is 1.6 m; the crest of the water outlet weir 46 of the upflow well 42 is 0.08 m lower than the low water level of the river channel; typha orientalis (with the density of 20-25 plants/m) is planted above the filler in the downflow well 41 and the upflow well 42 in sequence2) Zaishenghua (density 15 buds/m)2）。
The high-water-permeability biological filler 43 comprises a PVC spherical framework, small zeolite filled in the framework and having a filling rate of 70%, and a biological membrane, wherein the thickness of the biological membrane is 0.5-4 mm, the bacterial community structure of the biological membrane is that pseudomonas (Proteobacteria) accounts for 34% of the total number of bacteria, and the rest is symbiotic bacteria (such as Chloroflexi, Actinobacteria and bacteroides) related to the formation of the biological membrane.
The control method comprises the following steps: intercepting initial rainwater of the ditch 11 with the minimum intercepting capacity of the first 20min, and continuously raining, and discharging the rainwater into a water body through an overflow weir 15 or a drainage weir 45 (a gate 32 is opened); collecting initial rainwater into intercepting ditch 11 with maximum water depth of 0.3m and flow rate of less than 0.8 m/s, and intercepting garbage such as plastic bags and leaves with herba Lysimachiae Christinae; rainwater enters the cyclone separation body along a tangent line, the total hydraulic retention time is about 50s, sand grains sink into the third part 23 of the cyclone separation body and are discharged by a pump through a pipeline 24 at regular intervals; the separated water enters the biomembrane purification module 4 through the water outlet channel 31, moves downwards through the downflow well 41, then moves upwards through the upflow well 42, and fully contacts with the biomembrane, the cattail and the Reli root system on the biological filler 43 in the period, the total contact time is about 60 s, the organic matters and the nutritive salts are effectively reduced, and finally the water is discharged into the water body through the water outlet weir 46. When the lake water level is below the high water level, the gate 32 is opened; in the early stage of rainfall, runoff is discharged through a purification module; after continuous rainfall, the runoff is discharged directly into the lake by the overflow weir 15 or the drainage weir 45. When the rain does not fall, part of the biological filler 43 is immersed in the lake water to maintain the growth of the biological film; when the water level of the water body is at a high water level, the gate 32 is closed to prevent the lake water from flowing backward.
Example 1 the results show that the device is sensitive to COD in the initial rainCrThe removal rate of ammonia nitrogen and suspended matters can reach 53-70%, 32-58% and more than 95% respectively.
Example 2
The ecological purification apparatus used in this example has basically the same structure as that of example 1, except that:
the embodiment is used for a section of vertical hardening revetment of a certain river channel in plain areas in south China, a plurality of factory enterprises, residential areas and cement open spaces are distributed along the bank, and the space for ecological modification is very limited. 2 groups of interception purification modules are arranged along the shore aiming at surface runoff formed by early rainfall. The convergence distance of the rain water is 2.5 km, the local annual rainfall is about 1700 mm, and the COD in the early rain waterCrThe concentrations of the ammonia nitrogen and the suspended matters are respectively 130-240 mg/L, 2-6 mg/L and 500-700 mg/L.
The length of the interception ditch 11 is about 800 m, the distance between the bottom surface and the top end of the revetment is about 0.6 m, and the width is 0.5 m; the thickness of the soil layer is about 0.15 m, the thickness of the PVC honeycomb pore plate 13 is about 5 cm, calamus is planted, and the density is 30-40 plants/m2。
The cross-sectional diameter of the first portion 21 of the cyclonic separation module 2 is 2.6 m; the bottom side of the third portion 23 includes an angle of 60.
The opening of the channel 31 has a height of 0.6 m and a length of about 1.5 m.
The biofilm purification modules 4 are 2 and are arranged in series.
The filling rate of the high-permeability biological filler 43 filled in the downflow well 41 of the 1 st biological membrane purification module 4 is about 90%, and the filling thickness is 2.0 m, and the filling rate of the high-permeability biological filler 43 filled in the upflow well 42 is about 68%, and the filling thickness is 1.5 m.
The filling rate of the high-permeability biological filler 43 filled in the downflow well 41 of the 2 nd biological membrane purification module 4 is about 68 percent, and the filling thickness is 1.5m, and the filling rate of the high-permeability biological filler 43 filled in the upflow well 42 is about 68 percent, and the filling thickness is 1.5 m.
The crest of the water outlet weir 46 of the 2 upflow wells 42 is 0.1 m lower than the low water level of the river channel; the downwash wells 41 and the upwash wells 42 are alternately planted with the redroot flowers (density 15 buds/m)2) And reed (density 20 buds/m)2）。
The filling rate of the small zeolite in the PVC spherical frame is 75%, the thickness of the biological membrane is preferably 1-5 mm, and the bacterial community structure is preferably pseudomonas (Proteobacteria) accounting for 46% of the total number of bacteria.
The control method comprises the following steps: the initial rainwater with the minimum interception capacity of the interception ditch of the first 20min is continuously rained and drained into a river through the overflow weir 15 or the drainage weir 45 (the gate 32 is opened); the initial rainwater is converged into the interception ditch 11, the maximum water depth in the ditch is 0.3m, the flow rate is controlled to be less than 0.7 m/s, and the calamus intercepts garbage such as plastic bags, leaves and the like; rainwater enters the cyclone separation body along a tangent line, the total hydraulic retention time is about 60 s, sand grains sink into the third part 23 of the cyclone separation body and are discharged by a pump through a pipeline 24 at regular intervals; separated water sequentially passes through the 2 biomembrane purification modules 4 through the water outlet channel 31, moves downwards through the downflow well 41, then moves upwards through the upflow well 42, and fully contacts with the biomembrane on the filler, the stamina and the reed root system in the period, the total contact time is more than 90 s, organic matters and nutritive salts are effectively reduced, and finally the water is discharged into a water body through the water outlet weir 46. When the river water level is below the high water level, the gate 32 is opened; in the early stage of rainfall, runoff is purified and discharged; after continuous rainfall, the runoff is directly discharged into the river channel through the overflow weir 15 or the drainage weir 45. When the rainfall is not present, the river water submerges part of the biological filler 43 to maintain the growth of the biological film; when the water level of the water body is at a high water level, the gate 32 is closed to prevent the river water from flowing backward.
Example 2 the results show that the device is directed to COD in incipient rainwaterCrThe removal rate of ammonia nitrogen and suspended matters can reach 65-79%, 44-67% and more than 95% respectively.
The present invention has been described in detail, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the same, and the protection scope of the present invention should not be limited thereby, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (10)
1. The utility model provides an ecological purifier of surface runoff which characterized in that: the ecological purification device of surface runoff comprises one or more interception purification modules, each interception purification module comprises a runoff interception ditch module (1), a cyclone separation module (2) communicated with the tail end of the runoff interception ditch module (1), a water outlet channel module (3) communicated with the cyclone separation module (2), and one or more biomembrane purification modules (4) communicated with the water outlet channel module (3).
2. The ecological purification plant of surface runoff according to claim 1, characterized in that: the water revetment is located runoff intercept one side of ditch module (1), go out ditch module (3) with biomembrane purification module (4) set up side by side and be located the runoff intercept the opposite side of ditch module (1).
3. An ecological purification installation of surface runoff according to claim 1 or 2, characterized in that: the inner side wall of the runoff interception ditch module (1) is tightly attached to the side wall of the water body revetment, and the top end of the inner side wall of the runoff interception ditch module (1) is flush with the height of the water body revetment; the runoff intercept ditch module (1) the lateral wall with the inside wall of the water outlet channel module (3) and the inside wall of the biomembrane purification module (4) share, just the lateral wall of the runoff intercept ditch module (1) be higher than the water revetment.
4. The ecological purification plant of surface runoff according to claim 1, characterized in that: the runoff interception ditch module (1) comprises an interception ditch (11) with an inner side wall and an outer side wall, a soil layer (12) laid on the bottom surface of the interception ditch (11), a honeycomb pore plate (13) laid on the soil layer (12), and grass plants (14) planted on the soil layer (12), wherein the tail end of the interception ditch (11) is connected with the cyclone separation module (2) in the tangential direction.
5. The ecological purification plant of surface runoff according to claim 4, characterized in that: the gradient of the bottom surface of the interception ditch (11) from the starting end to the tail end is 0.0003-0.0010.
6. The ecological purification plant of surface runoff according to claim 1, characterized in that: the cyclone separation module (2) comprises a first part (21) which is positioned at the upper part and is a hollow cylinder, a second part (22) of which the upper end part is connected with the lower end part of the first part (21) and is in an inverted circular truncated cone shape, a third part (23) of which the upper end part is connected with the lower end part of the second part (22) and is in an inverted circular truncated cone shape, a pipeline (24) connected with the third part (23), and a sand discharge pump connected with the pipeline (24); the height-diameter ratio of the first part (21) is 0.3-0.6: 1, and the top of the first part (21) is higher than the high water level of the water body; the height of the second part (22) is 0.2-0.3 times of the height of the first part (21), and the included angle between the side wall of the second part (22) and the upper bottom surface is 30-35 degrees; the height of the third portion (23) is 0.8-1 times of the height of the first portion (21), and an included angle between the side wall of the third portion (23) and the upper bottom surface is 60-70 degrees.
7. The ecological purification plant of surface runoff according to claim 6, characterized in that: the water outlet channel module (3) comprises a water outlet channel (31) and a gate (32), wherein the water outlet channel (31) is respectively communicated with the rotational flow separation module (2) and the biological membrane purification module (4), and the gate (32) is arranged on the water outlet channel (31); the width of outlet channel (31) be runoff cut back 2~4 times of the width of the ditch (11) of cutting back of ditch module (1), the opening height of outlet channel (31) be 50~70% of first portion (21) height and the top of outlet channel (31) with the top parallel and level of first portion (21), the axis of outlet channel (31) with the axial lead of first portion (21) intersect.
8. The ecological purification plant of surface runoff according to claim 1, characterized in that: the biofilm purification module (4) comprises a descending well (41), an ascending well (42) communicated with the descending well (41) through the lower part, biological fillers (43) filled in the descending well (41) and the ascending well (42), emergent aquatic plants (44) planted at the top of the fillers, a drainage weir (45) arranged between the descending well (41) and the ascending well (42) and the top of the drainage weir is flush with the high water level of a water body, and an effluent weir (46) arranged at the upper part of the descending well (41); the widths of the downflow well (41) and the upflow well (42) are not less than the width of the outlet channel (31) of the outlet channel module (3), the filling rate of the biological filler (43) in the downflow well (41) is 60-100%, the filling thickness is not less than 1.2m, and the top of the biological filler (43) in the downflow well (41) is flush with the normal water level of the water body; the filling rate of the biological filler (43) in the upflow well (42) is 60-100%, the filling thickness is not less than 1m, the top of the biological filler (43) in the upflow well (42) is higher than the low water level of the water body, and the weir top of the effluent weir (46) is lower than the low water level of the water body.
9. The ecological purification plant of surface runoff according to claim 8, characterized in that: the biological filler (43) comprises a framework, zeolite and/or volcanic rock which are filled in the framework and have a filling rate of 60-80%, and a biological film, wherein the thickness of the biological film is 0.5-10 mm, and the bacterial community structure of the biological film is that pseudomonas accounts for 30-50% of the total number of bacteria.
10. The ecological purification plant of surface runoff according to claim 1, characterized in that: when the number of the biological membrane purification modules (4) is multiple, the biological membrane purification modules (4) are sequentially connected in series.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110845086A (en) * | 2019-12-17 | 2020-02-28 | 苏州科技大学 | Ecological purification device and method for surface runoff |
| CN112374686A (en) * | 2020-09-01 | 2021-02-19 | 重庆大学 | Surface runoff collecting, purifying, storing and recycling system for railway storage yard |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110845086A (en) * | 2019-12-17 | 2020-02-28 | 苏州科技大学 | Ecological purification device and method for surface runoff |
| CN112374686A (en) * | 2020-09-01 | 2021-02-19 | 重庆大学 | Surface runoff collecting, purifying, storing and recycling system for railway storage yard |
| CN112374686B (en) * | 2020-09-01 | 2022-11-29 | 中铁二院重庆勘察设计研究院有限责任公司 | Surface runoff collecting, purifying, storing and recycling system for railway storage yard |
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