CN104944713B - Mountainous City road runoff staged nitrogen rejection facility - Google Patents

Mountainous City road runoff staged nitrogen rejection facility Download PDF

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CN104944713B
CN104944713B CN201510409059.0A CN201510409059A CN104944713B CN 104944713 B CN104944713 B CN 104944713B CN 201510409059 A CN201510409059 A CN 201510409059A CN 104944713 B CN104944713 B CN 104944713B
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filter layer
meters
vegetation growth
dielectric layer
drainage blanket
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CN104944713A (en
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王书敏
李强
于慧
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Chongqing University of Arts and Sciences
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Chongqing University of Arts and Sciences
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Abstract

Patent of the present invention discloses Mountainous City road runoff staged nitrogen rejection facility, and the device is by coagulation device(11)With two stage treatment device(12)It is in series;Coagulation device(11)By by-pass line(1), vegetation growth dielectric layer I(2), filter layer I(3), drainage blanket I(4), filter layer II(5), baffle plate(6), planting plants(8), inhalant region(9), intercommunicating pore(10), vegetation growth dielectric layer II(13)Composition;Two stage treatment device(12)By vegetation growth dielectric layer III(14), filter layer III(16), drainage blanket II(17), filter layer IV(18), baffle plate(6), drainpipe(7), planting plants(8), intercommunicating pore(10), vegetation growth dielectric layer IV(15)Composition.This patent advantage is as follows:The transitory efficient for realizing Mountainous City storm runoff Different Nitrogen Concentration is removed;Plant area is small, flexible arrangement, and its storm runoff nitrate pollution for being applied to heavy grade road surface is controlled.

Description

Mountainous City road runoff staged nitrogen rejection facility
Technical field
Patent of the present invention belongs to environmental protection technical field, and in particular to the removal of nitrogen in the storm runoff of Mountainous City, Be particularly suitable for use in the removal of heavy grade roadway storm runoff dissolubility nitrogen.
Background technology
Body eutrophication is one of great water environmental problems that China faces at present, it has also become restriction Chinese national economy The important bottleneck of development.Nitrogen is the primary trophism limiting factor of plant, algae and microorganism growth, is to trigger water eutrophication One of main driving element changed, the excessive input and enrichment of Water often lead to the change of aquatic ecological environment [Collins K A, Lawrence T J, Stander E K, Jontos R J, Kaushal S S, Newcomer T A, Grimm N B, Cole Ekberg M L. Opportunities and challenges for managing nitrogen in urban stormwater: A review and synthesis[J]. Ecological Engineering, 2010,36: 1507–1519].In recent years, urbanization is quickly propelled so that substantial amounts of ecosystem ground It is changed into waterproof underlying surface rapidly, greatly reduces the nitrogen retentivity of urban area during heavy rain;At the same time, with point The continuous improvement of source contamination control rate, contribution of the urban storm runoff to receiving water body nitrate pollution increasingly highlights [Davidson E A, Savage K E, Bettez N D, Marino R, Howarth R W. Nitrogen in runoff from residential roads in a coastal area[J]. Water Air Soil Pollution, 2010,210:3- 13.].It is reported that more than the 50% of many countries and regions receiving water body nitrate pollution comes from urban storm runoff, 2/3 river Saliva environment functional deterioration [Pitt R, Maestre A, Morquecho R. The due to storm runoff nitrate pollution National Stormwater Quality Database (NSQD, version 1.1)[DB]. Dept. of Civil and Environmental Engineering, University of Alabama, Tuscaloosa, AL. 2005.]。 Therefore, the efficiently control of concern urban storm runoff nitrate pollution is significant.
Mountainous City is with a varied topography, and the short stream in storm runoff peak is anxious, more strong to washing away for underlying surface pollution of circulation thing, right The water quality safety of receiving water body threatens more prominent.Seminar is to mountain city Chongqing different underlying surface storm runoff nitrate pollution Study for a long period of time middle discovery, and dissolubility nitrogen is the main occurrence patterns of nitrogen in storm runoff(Account for the 73-82% of total nitrogen), and dissolve Property nitrogen in again based on inorganic nitrogen(Account for the 63-82% of total nitrogen)[what is strong, Peng Shujuan, Wang Shumin, Wang Zhen great waves different underlying surface heavy rains Runoff nitrogen occurrence patterns distribution character and control technology [J] civil construction and environmental project, 2012,34 (5):147-153]. Dissolubility nitrogen includes several forms such as ammonium nitrogen, nitrate nitrogen, soluble organic nitrogen, and the biological effectiveness of different form nitrogen is not Together, generally dissolubility nitrogen is easier to be bioavailable compared with solid nitrogen.So far, for the removal means of dissolubility nitrogen Also than relatively limited, traditional wetland technology for dissolubility nitrogen removal efficiency also than relatively low, the efficient removal of dissolubility nitrogen is also led Rely on " nitrification-denitrification " bioprocess carry out [Wilcock R J, M ü ller K, van Assema G B, Bellingham M A, Ovenden R. Attenuation of Nitrogen, Phosphorus and E. coli Inputs from Pasture Runoff to Surface Waters by a Farm Wetland: the Importance of Wetland Shape and Residence Time[J]. Water Air Soil Pollut., 2012,223:499–509].However, " nitrification-denitrification " process needs the reaction time to ensure, carbon source guarantee, and " aerobic-anaerobic " alternate reaction condition guarantee, this is for contributing time is short, runoff yield is big and carbon source relative deficiency mountain region There is great challenge for urban storm runoff.
The method that published Chinese patent illustrates several urban storm runoff nitrate pollution regulation and control.Patent document CN101913709A " a kind of composite ecological intercepting padding material and preparation method " proposes a kind of filling out for urban storm runoff nitrogen phosphorus retention Material, but the technology opens water body mainly for lake etc.;Patent document CN1446759A " the compound wetlands of nitrogen and phosphorus pollution control Ecological method and its system " proposes a kind of control technology of storm runoff nitrate pollution, but the technical sophistication degree is relatively Height, hydraulic detention time is longer, in the nervous Mountainous City of land used and is not suitable with.Overall water, for Mountainous City heavy rain footpath The technology that stream nitrate pollution is efficiently controlled is also fewer, according to Mountainous City geographical features, specific aim exploitation storm runoff The transitory efficient technology of nitrate pollution is necessary.
The content of the invention
Mountainous City storm runoff nitrate pollution is one of main source of city receiving water body pollution, meanwhile, it is traditional Urban storm runoff control measures do not have fast denitrogenation function, therefore, realize Mountainous City storm runoff nitrate pollution Fast eliminating has very big technological challenge in short-term.In consideration of it, the present invention is directed to Mountainous City stormwater pollution characteristic and mountain region City Terrain feature, proposes a kind of Mountainous City road runoff staged nitrogen rejection facility of suitable Mountainous City characteristic.The device The Different Nitrogen Concentration in storm runoff can be efficiently reduced, management is simple, is not required to power, can be widely used for the vast mountain region in southwestern section City.
The technical scheme of patent of the present invention is as follows:
Mountainous City road runoff staged nitrogen rejection facility, it is characterised in that:Described device is by coagulation device(11) With two stage treatment device(12)It is in series, coagulation device(11)With two stage treatment device(12)Pass through intercommunicating pore(10)Even Connect, intercommunicating pore(10)It is high 100mm, wide 1000mm rectangular configuration, and intercommunicating pore(10)Top is located at vegetation growth dielectric layer Ⅲ(14)Bottom, intercommunicating pore(10)Bottom is higher than filter layer III(16)Bottom 600mm;
The coagulation device(11)By by-pass line(1), vegetation growth dielectric layer I(2), filter layer I(3), draining Layer I(4), filter layer II(5), baffle plate(6), planting plants(8), inhalant region(9), intercommunicating pore(10), vegetation growth dielectric layer II (13)Composition;Vegetation growth dielectric layer I(2)With vegetation growth dielectric layer II(13)Thickness is 0.2 meter, and width is 1.5 meters, Length is 1.5 meters, is mixed by sand and river sand, and the mixed proportion of sand and river sand is:Sand volume:River sand volume =3:7;Filter layer I(3)0.7 meter of thickness, length and width is 1.5 meters, is made up of quartz sand filling, and filter layer I(3)Top Portion is higher than filter layer II(5)0.2 meter of top;Drainage blanket I(4)0.3 meter of thickness, it is wide 1.5 meters, it is long 3.0 meters, by particle diameter 10-20mm Lime stone constitute;Filter layer II(5)0.5 meter of thickness, length and width is 1.5 meters, by particle diameter 2-3mm volcanic rock structure Into;
The two stage treatment device(12)By vegetation growth dielectric layer III(14), filter layer III(16), drainage blanket II(17)、 Filter layer IV(18), baffle plate(6), drainpipe(7), planting plants(8), intercommunicating pore(10), vegetation growth dielectric layer IV(15)Group Into;Vegetation growth dielectric layer III(14)With vegetation growth dielectric layer IV(15)Thickness is 0.2 meter, and width is 1.5 meters, length It is 1.5 meters, is mixed by sand and river sand, the mixed proportion of sand and river sand is:Sand volume:River sand volume=3: 7;Filter layer III(16)0.7 meter of thickness, length and width is 1.5 meters, is made up of quartz sand filling, and filter layer III(16)Top Portion is higher than filter layer IV(18)0.2 meter of top;Drainage blanket II(17)0.3 meter of thickness, it is wide 1.5 meters, it is long 3.0 meters, by particle diameter 10- 20mm lime stone is constituted;Filter layer IV(18)0.5 meter of thickness, length and width is 1.5 meters, by particle diameter 2-3mm volcano Rock is constituted.
Mountainous City road runoff staged nitrogen rejection facility according to claim 1, it is characterised in that:Drainage blanket I (4)Bottom is higher than drainage blanket II(17)Bottom 400mm.
Mountainous City road runoff staged nitrogen rejection facility according to claim 1, it is characterised in that:By-pass line (1)Higher than vegetation growth dielectric layer I(2)0.2 meter, it is made up of diameter 200mm pvc pipe;Filter layer I(3)Positioned at vegetation growth Dielectric layer I(2)Underface, and with vegetation growth dielectric layer I(2)Bottom is connected;Drainage blanket I(4)Positioned at coagulation device (11)Bottom, and drainage blanket I(4)Top and filter layer I(3), filter layer II(5)It is connected.
Mountainous City road runoff staged nitrogen rejection facility according to claim 1, it is characterised in that:Filter layer I (3)With filter layer II(5)Between use baffle plate(6)Separate;Baffle plate(6)It is vertical to place, it is highly 1.2 meters, width is 1.5 meters, thick Spend for 10mm, be made up of PVC materials;Baffle plate(6)Bottom and drainage blanket I(4)Top is connected, and baffle plate(6)Bottom is located at draining Layer I(4)Top middle;Baffle plate(6)Top is higher than vegetation growth dielectric layer I(2)0.3 meter.
Mountainous City road runoff staged nitrogen rejection facility according to claim 1, it is characterised in that:Filter layer III (16)With filter layer IV(18)Between use baffle plate(6)Separate;Baffle plate(6)It is vertical to place, it is highly 1.2 meters, width is 1.5 meters, Thickness is 10mm, is made up of PVC materials;Baffle plate(6)Bottom and drainage blanket II(17)Top is connected, and baffle plate(6)Bottom is located at Drainage blanket II(17)Top middle.
Mountainous City road runoff staged nitrogen rejection facility according to claim 1, it is characterised in that:Rainfall runoff Flow direction in device enters inhalant region for deflector type, i.e. rainfall runoff(9)Afterwards, flow through successively:Vegetation growth dielectric layer I(2)、 Filter layer I(3), drainage blanket I(4), filter layer II(5), intercommunicating pore(10), filter layer III(16), drainage blanket II(17), filter layer Ⅳ(18), drainpipe(7).
Mountainous City road runoff staged nitrogen rejection facility according to claim 1, it is characterised in that:Drainpipe (7)Higher than drainage blanket II(17)0.3 meter of top, is made up of diameter 200mm pvc pipe.
Mountainous City road runoff staged nitrogen rejection facility according to claim 1, it is characterised in that:Planting plants (8)Root system can penetrate vegetation growth dielectric layer I(2), filter layer I(3), filter layer II(5), vegetation growth dielectric layer II(13)、 Vegetation growth dielectric layer III(14), filter layer III(16), filter layer IV(18), vegetation growth dielectric layer IV(15), and extend extremely Drainage blanket I(4), drainage blanket II(17)In, it is not necessary to add the solid carbon source needed for denitrification denitrogenation.
Mountainous City road runoff staged nitrogen rejection facility according to claim 1, it is characterised in that:Inhalant region (9)Length, width and height are respectively 1.5 meters, 1.5 meters and 0.2 meter, and excessive rainfall runoff can be through by-pass line(1)Outflow.
The major advantage of patent of the present invention is as follows:(1), realize the transitory efficient of Mountainous City storm runoff Different Nitrogen Concentration Remove, be not required to power, also have obvious removal effect for the organic matter in storm runoff;(2), plant area it is small, flexible arrangement, It is easy for installation, it can suitably be adjusted according to specific landform, not influence urban landscape, the storm runoff on the heavy grade road surface that is particularly suitable for use in Nitrate pollution is controlled.
Brief description of the drawings
Fig. 1 is the monomer schematic diagram of the device, during Fig. 2 is A-A profiles, figure:
1-by-pass line;2-vegetation growth dielectric layer I;3-filter layer I;4-drainage blanket I;5-filter layer II;6— Baffle plate;7-drainpipe;8-planting plants;9-inhalant region;10-intercommunicating pore;11-coagulation device;12-two stage treatment Device;13-vegetation growth dielectric layer II;14-vegetation growth dielectric layer III;15-vegetation growth dielectric layer IV;16-filtering Layer III;17-drainage blanket II;18-filter layer IV.
Embodiment
Fig. 1-Fig. 2 is present apparatus schematic diagram.Road surface rainfall runoff flows into inhalant region first(9), Initial Runoff pass through vegetation Somatomedin layer I(2)Into device, when run-off is excessive, excessive runoff is via by-pass line(1)Discharge.Into inside device Rainfall runoff, continue to flow downwardly through filter layer I(3), drainage blanket I(4), then baffling flow up through filter layer II(5), through even Through hole(10), flow into two stage treatment device(12).Due to intercommunicating pore(10)Absolute altitude be higher than drainage blanket I(4), in drainage blanket I(4) Region and filter layer I(3), filter layer II(5)Subregion formed flooding area, and flooding area carry out denitrification denitrogenation, instead Carbon source is by going deep into the planting plants of flooding area needed for nitrification(8)Root system is provided.To strengthen the removal effect of nitrogen, rainfall runoff enters Enter two stage treatment device(12)Afterwards, continue to flow through filter layer III successively(16), drainage blanket II(17), filter layer IV(18), finally Through drainpipe(7)Bleeder;Due to drainpipe(7)Absolute altitude be less than intercommunicating pore(10), higher than drainage blanket II(17), rainfall footpath Stream flows through two stage treatment device(12)When, the alternating change of " Aerobic-anaerobic " state is sequentially passed through, denitrogenation effect is further improved Really.

Claims (8)

1. Mountainous City road runoff staged nitrogen rejection facility, it is characterised in that:Described device is by coagulation device(11)With Two stage treatment device(12)It is in series, coagulation device(11)With two stage treatment device(12)Pass through intercommunicating pore(10)Even Connect, intercommunicating pore(10)It is high 100mm, wide 1000mm rectangular configuration, and intercommunicating pore(10)Top is located at vegetation growth dielectric layer Ⅲ(14)Bottom, intercommunicating pore(10)Bottom is higher than filter layer III(16)Bottom 600mm;
The coagulation device(11)By by-pass line(1), vegetation growth dielectric layer I(2), filter layer I(3), drainage blanket I (4), filter layer II(5), baffle plate(6), planting plants(8), inhalant region(9), intercommunicating pore(10), vegetation growth dielectric layer II(13) Composition;Vegetation growth dielectric layer I(2)With vegetation growth dielectric layer II(13)Thickness is 0.2 meter, and width is 1.5 meters, length It is 1.5 meters, is mixed by sand and river sand, the mixed proportion of sand and river sand is:Sand volume:River sand volume=3: 7;Filter layer I(3)0.7 meter of thickness, length and width is 1.5 meters, is made up of quartz sand filling, and filter layer I(3)Top is high In filter layer II(5)0.2 meter of top;Drainage blanket I(4)0.3 meter of thickness, it is wide 1.5 meters, it is long 3.0 meters, by particle diameter 10-20mm stone Lime stone is constituted;Filter layer II(5)0.5 meter of thickness, length and width is 1.5 meters, is made up of particle diameter 2-3mm volcanic rock;
The two stage treatment device(12)By vegetation growth dielectric layer III(14), filter layer III(16), drainage blanket II(17), filtering Layer IV(18), baffle plate(6), drainpipe(7), planting plants(8), intercommunicating pore(10), vegetation growth dielectric layer IV(15)Composition;Plant By somatomedin layer III(14)With vegetation growth dielectric layer IV(15)Thickness is 0.2 meter, and width is 1.5 meters, and length is 1.5 meters, mixed by sand and river sand, the mixed proportion of sand and river sand is:Sand volume:River sand volume=3:7;Cross Filtering layer III(16)0.7 meter of thickness, length and width is 1.5 meters, is made up of quartz sand filling, and filter layer III(16)Top is high In filter layer IV(18)0.2 meter of top;Drainage blanket II(17)0.3 meter of thickness, it is wide 1.5 meters, it is long 3.0 meters, by particle diameter 10-20mm's Lime stone is constituted;Filter layer IV(18)0.5 meter of thickness, length and width is 1.5 meters, is made up of particle diameter 2-3mm volcanic rock;
Planting plants(8)Root system penetrates vegetation growth dielectric layer I(2), filter layer I(3), filter layer II(5), vegetation growth medium Layer II(13), vegetation growth dielectric layer III(14), filter layer III(16), filter layer IV(18), vegetation growth dielectric layer IV(15), And extend to drainage blanket I(4), drainage blanket II(17)In, it is not necessary to add the solid carbon source needed for denitrification denitrogenation.
2. Mountainous City road runoff staged nitrogen rejection facility according to claim 1, it is characterised in that:Drainage blanket I(4) Bottom is higher than drainage blanket II(17)Bottom 400mm.
3. Mountainous City road runoff staged nitrogen rejection facility according to claim 1, it is characterised in that:By-pass line (1)Higher than vegetation growth dielectric layer I(2)0.2 meter, it is made up of diameter 200mm pvc pipe;Filter layer I(3)Positioned at vegetation growth Dielectric layer I(2)Underface, and with vegetation growth dielectric layer I(2)Bottom is connected;Drainage blanket I(4)Positioned at coagulation device (11)Bottom, and drainage blanket I(4)Top and filter layer I(3), filter layer II(5)It is connected.
4. Mountainous City road runoff staged nitrogen rejection facility according to claim 1, it is characterised in that:Filter layer I(3) With filter layer II(5)Between use baffle plate(6)Separate;Baffle plate(6)It is vertical to place, it is highly 1.2 meters, width is 1.5 meters, thickness is 10mm, is made up of PVC materials;Baffle plate(6)Bottom and drainage blanket I(4)Top is connected, and baffle plate(6)Bottom is located at drainage blanket I (4)Top middle;Baffle plate(6)Top is higher than vegetation growth dielectric layer I(2)0.3 meter.
5. Mountainous City road runoff staged nitrogen rejection facility according to claim 1, it is characterised in that:Filter layer III (16)With filter layer IV(18)Between use baffle plate(6)Separate;Baffle plate(6)It is vertical to place, it is highly 1.2 meters, width is 1.5 meters, Thickness is 10mm, is made up of PVC materials;Baffle plate(6)Bottom and drainage blanket II(17)Top is connected, and baffle plate(6)Bottom is located at Drainage blanket II(17)Top middle.
6. Mountainous City road runoff staged nitrogen rejection facility according to claim 1, it is characterised in that:Rainfall runoff exists Flow direction in device enters inhalant region for deflector type, i.e. rainfall runoff(9)Afterwards, flow through successively:Vegetation growth dielectric layer I(2), mistake Filtering layer I(3), drainage blanket I(4), filter layer II(5), intercommunicating pore(10), filter layer III(16), drainage blanket II(17), filter layer IV (18), drainpipe(7).
7. Mountainous City road runoff staged nitrogen rejection facility according to claim 1, it is characterised in that:Drainpipe(7) Higher than drainage blanket II(17)0.3 meter of top, is made up of diameter 200mm pvc pipe.
8. Mountainous City road runoff staged nitrogen rejection facility according to claim 1, it is characterised in that:Inhalant region(9) Length, width and height are respectively 1.5 meters, 1.5 meters and 0.2 meter, and excessive rainfall runoff is through by-pass line(1)Outflow.
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CN204848580U (en) * 2015-07-14 2015-12-09 重庆文理学院 Cascaded nitrogen rejection facility of mountain region urban road runoff

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CN103936221A (en) * 2013-01-21 2014-07-23 重庆文理学院 Device for efficient control of runoff nitrogen element pollution in mountainous region and city roads

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