CN110316820A - A kind of biological delaying basin of synchronous denitrification dephosphorizing - Google Patents
A kind of biological delaying basin of synchronous denitrification dephosphorizing Download PDFInfo
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- CN110316820A CN110316820A CN201910690367.3A CN201910690367A CN110316820A CN 110316820 A CN110316820 A CN 110316820A CN 201910690367 A CN201910690367 A CN 201910690367A CN 110316820 A CN110316820 A CN 110316820A
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 89
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 229910052742 iron Inorganic materials 0.000 claims abstract description 45
- 230000004048 modification Effects 0.000 claims abstract description 40
- 238000012986 modification Methods 0.000 claims abstract description 40
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 28
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000011049 filling Methods 0.000 claims abstract description 24
- 238000007689 inspection Methods 0.000 claims abstract description 14
- 238000000576 coating method Methods 0.000 claims abstract description 11
- 239000011248 coating agent Substances 0.000 claims abstract description 10
- 239000003610 charcoal Substances 0.000 claims description 34
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 8
- 241000196324 Embryophyta Species 0.000 claims description 6
- 241000209094 Oryza Species 0.000 claims description 6
- 239000010903 husk Substances 0.000 claims description 6
- 238000010828 elution Methods 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 3
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000000197 pyrolysis Methods 0.000 claims description 3
- 230000007306 turnover Effects 0.000 claims 1
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 25
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 15
- 239000011574 phosphorus Substances 0.000 abstract description 15
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 4
- 239000010410 layer Substances 0.000 abstract description 2
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical compound [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 13
- 239000000945 filler Substances 0.000 description 11
- 230000006872 improvement Effects 0.000 description 6
- 238000002386 leaching Methods 0.000 description 5
- 238000012856 packing Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000000706 filtrate Substances 0.000 description 4
- 235000015097 nutrients Nutrition 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 206010021143 Hypoxia Diseases 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000007954 hypoxia Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000256113 Culicidae Species 0.000 description 1
- 241000255925 Diptera Species 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 238000006424 Flood reaction Methods 0.000 description 1
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000003403 water pollutant Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2806—Anaerobic processes using solid supports for microorganisms
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
- C02F3/342—Biological treatment of water, waste water, or sewage characterised by the microorganisms used characterised by the enzymes used
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/163—Nitrates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/166—Nitrites
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/001—Runoff or storm water
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses a kind of biological delaying basin of synchronous denitrification dephosphorizing, including be distributed in biological delaying basin ontology from top to bottom Super High, flood layer, coating, iron modification biological carbon filling material layer, gravel drainage blanket and water outlet；It is equipped with inspection shaft in delaying basin ontology, rain perforaled strainer is equipped at the top of inspection shaft, bottom is equipped with overflow water outlet, and side wall is connected to water outlet；In biological delaying basin ontology Super High with flood layer height h be gravel drain layer height a+1/5 iron modification biological carbon filling material layer height b；Flooding layer height is 1/3 iron modification biological carbon filling material layer height；It is collected by the water outlet turned over from bottom away from the water outlet for flooding layer from bottom level a+1/5b height；Beyond the rainwater for flooding layer height, from the overflow water outlet discharge of rain perforaled strainer well on inspection.The present invention is synchronous to improve biological delaying basin to the removal rate of runoff rainwater nitrogen phosphorus, enhances Nitrogen/Phosphorus Removal.
Description
Technical field
The present invention relates to rainwater treatment technical field more particularly to a kind of biological delaying basins of high efficiency synchronous denitrogenation dephosphorizing.
Background technique
Various countries' storm water man- agement theory respectively has its characteristic, and LID theory more meets China's actual conditions, and studies in China person is directed to LID
Many effort are made that in the application of China, propose the LID measure that many suitable country utilize to realize storm water man- agement target.
A kind of LID measure of the biological delaying basin as typical source control, is used widely in the world, city can be effectively relieved
City's rainfall runoff impacts the hydrology, water quality and Ecology bring.General biology delaying basin its for some heavy metals, suspended matter
Deng removal effect it is good, but to the removal effect of the nutrients such as N, P fluctuate it is larger.Some researches show that carrier performance is especially
The chemisorptive properties of filler are the main factors for determining biological delaying basin Nitrogen/Phosphorus Removal.For this purpose, there is research to try hard to lead to
Improved packing is crossed to improve the removal effect of N, P, by the water treatment residue or 10% sulfuric acid that add 5% in biological delaying basin
The processed montmorillonite of aluminium improves the removal effect to N, P.The removal of phosphorus relies primarily on iron in filler and aoxidizes in biological delaying basin
The absorption of object, and the content of iron has certain influence to the effect of filling adsorption phosphorus in filler.On the other hand, difference floods depth
Degree also has a certain impact to the removal effect of N, P.
Summary of the invention
It is simple and reasonable the purpose of the present invention is to provide a kind of biological delaying basin of efficient synchronous denitrification dephosphorizing,
At low cost, ecology, health, energy conservation are particularly suited for the rainfall runoff nutrients disposition under arid and semi-arid weather and promote.The present invention
It is modified that iron is improved by improved packing composition, filling-material structure to the cutting mechanisms of the nutrients such as N, P from biological delaying basin
Removal of the charcoal under flooding area water yielding condition at 1/5 bed stuffing height to nutrients such as N, P in rainfall runoff solves biology
It is detained facility N, P high efficiency synchronous and removes problem, reduces rain water pollutant, avoid the eutrophication of water body.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that
The one embodiment provided according to the present invention, the present invention provides a kind of biological delaying basin of synchronous denitrification dephosphorizing,
Including biological delaying basin ontology, and be distributed in biological delaying basin ontology from top to bottom Super High, flood layer, coating,
Iron modification biological carbon filling material layer, gravel drainage blanket and water outlet；It is equipped with inspection shaft in delaying basin ontology, is equipped at the top of inspection shaft
Rain perforaled strainer, bottom are equipped with overflow water outlet, and side wall is connected to water outlet；
Super High is that gravel drains layer height a and 1/5 iron is modified with the height h for flooding layer in the biology delaying basin ontology
The sum of height b of charcoal packing layer；Flooding layer height is 1/3 iron modification biological carbon filling material layer height；By being turned over from bottom
Water outlet collect away from the water outlet for flooding layer at bottom level a+1/5b height；Beyond the rainwater for flooding layer height, from rainwater grid
The overflow water outlet discharge of sub well on inspection.
For above-mentioned technical proposal, there are also further preferred schemes by the present invention:
Charcoal is using rice rice husk drying, grinding, slagging-off, de- washes and iron in the iron modification biological carbon filling material layer
Modification is prepared.
In the iron modification biological carbon filling material layer charcoal the preparation method is as follows:
1) rice rice husk is placed in baking oven, is dried to constant weight at a temperature of 45~50 DEG C, be packed into closed container and be placed in horse
It is not cooled to room temperature in furnace in 500~600 DEG C of 1~2h of heating, grinding partial size is the particle of 0.15~0.25mm, then successively adopts
It is eluted with dehydrated alcohol, NaOH and HCl to remove pyrolysis residue, obtains charcoal；
2) charcoal is soaked in 1.0molL-1Hydrochloric acid solution in 1~2h, then elute to neutrality, and in 60~80
DEG C drying 10~15h；
3) 1 part of charcoal is placed in 1.5 parts of 1.01.0molL according to mass ratio-1FeCl3In solution, it is uniformly mixed
And for several times, 65~85 DEG C of drying are to get iron modification biological charcoal for deionized water elution after standing 1~2h.
Super High and layer height h >=150mm is flooded in the biology delaying basin ontology.
The gravel draining layer height is 150~200mm；The iron modification biological carbon filling material layer height be 600~
800mm；The covering layer height is 100~150mm.
The coating uses partial size for the rubble of 10~15mm.
The gravel drainage blanket uses partial size for the gravel of 30~45mm.
The water outlet turned over is connected to gravel drainage blanket, and the height of the water outlet turned over is that gravel drains layer height a+
The 1/5 of the height of iron modification biological carbon filling material layer.
The biology delaying basin ontology further includes plants on surface, and the plants on surface is set to the surface of the coating.
The overflow water outlet efflux time is in 6~48h.
Compared with existing rainwater sump, beneficial effects of the present invention are as follows:
The present invention changes a lot through iron modification biological charcoal compared to SWT physicochemical property.Iron modification biological charcoal ratio SWT is more
Slant acidity, content of ashes ratio SWT high 4%, 2.4 times of SWT high of CEC ratio, specific surface area is bigger, and zeta potential is lower, and surface is attached with
More Fe3+, while the surface functional group of iron modification biological charcoal is more abundant.Iron modification biological charcoal is as biological delaying basin filler
A kind of excellent modifying agent.
1/3 packed height flooding area is arranged under the conditions of different flooding area height in the present invention, and the improvement of iron modification biological charcoal is filled out
Material can effectively improve removal of the biological delaying basin to N, P.Comprehensively consider N, P removal effect and arid and semi-arid in rainfall runoff
The operational effect of biological delaying basin under weather is that biology is detained with 1/5 iron modification biological carbon filling material layer height+gravel drainage blanket
The design of the recessed depth in pond, and collect from water outlet that delaying basin body bottom portion turns over away from being flooded from bottom level a+1/5b height
It is a kind of most effective ameliorative measure that the no water outlet of layer, which is iron modification biological charcoal improvement homogeneous filler biological delaying basin, this is flooded
Depth can reach optimum efficiency to the removal of N, P.
The present invention also sets up overflow pipe, avoid due to rainfall it is larger caused by mid-term and later period stormwater overflow and caused by horse
Road ponding.The present invention also calculates emptying time, and emptying time is unsuitable too long, and facility cannot empty the rainwater stored in time, cause
Plant is flooded, and mosquitos and flies multiplies；Emptying time is also unsuitable too short, and facility empties water storage excessive velocities, make delaying basin rainwater purification,
Stagnant slow-release capability is stored to substantially reduce.In the present invention, 48h, lower limit should not be higher than by recommending biology to be detained facility emptying time upper limit value
It is worth not preferably less than 6h.
Detailed description of the invention
Fig. 1 is that iron modification biological charcoal of the present invention improves homogeneous filler biological delaying basin schematic diagram；
Fig. 2 is the schematic side view of Fig. 1；
Fig. 3 is the schematic top plan view of Fig. 1.
In figure: 1-Super High, 2-flood layer, 3-coatings, 4-iron modification biological carbon filling materials, 5-gravel layers, and 6-
Water outlet, 7-rain perforaled strainers, 8-inspection shafts, 9-overflow water outlets, 10-plants, 11-blow-down pipes.
Specific embodiment
Below in conjunction with attached drawing and specific embodiment, the present invention will be described in detail, herein illustrative examples of the invention
And explanation is used to explain the present invention, but not as a limitation of the invention.
As shown in Figure 1, the present embodiment provides a kind of biological delaying basin of high efficiency synchronous denitrogenation dephosphorizing, including biological delaying basin
Ontology, and be distributed in biological delaying basin ontology from top to bottom Super High 1, flood layer 2, coating 3, iron modification biological charcoal
Packing layer 4, gravel drainage blanket 5 and water outlet 6；It is equipped with inspection shaft 8 in delaying basin ontology, is equipped with rainwater grid at the top of inspection shaft 8
Son 7, bottom are equipped with overflow water outlet 9, and side wall is connected to water outlet 6；Biological delaying basin ontology further includes the table set on coating 3
Face plant 10.
The wherein recessed depth of biological delaying basin (Super High 1 and the height for flooding layer 2) h >=150mm, h=a+1/5b, gravel
Draining layer height a is 150~200mm；Iron modification biological carbon filling material layer height b is 600~800mm；Covering layer height c is 100
~150mm.From column bottom be equipped with for collects away from flooded from bottom level a+1/5 modification biological carbon filling material layer b height layer out
Water.Beyond the rainwater for flooding layer height, from rain perforaled strainer 7,8 overflow water outlet 9 of well is discharged on inspection.
As shown in Fig. 2, being equipped with blow-down pipe 11 below gravel drainage blanket 5.
As shown in figure 3, biological delaying basin shape is different, such as rectangle, circle, the present invention is directed to biological delaying basin structure type
It is designed with wire feeding, the present embodiment is taken as circle.Several water outlets 6 turned over are along 8 peripheral distribution of inspection shaft, overflow
Water outlet 9 is connected to municipal sewer pipe.
Wherein, in iron modification biological carbon filling material layer 4 charcoal be using rice rice husk drying, grinding, slagging-off, it is de- wash and
Iron modification is prepared.In iron modification biological carbon filling material layer charcoal the preparation method is as follows:
1) rice rice husk is placed in baking oven, is dried to constant weight at a temperature of 45~50 DEG C, be packed into closed container and be placed in horse
In 500~600 DEG C of heating 1~2h not in furnace, preferably 550 DEG C heating 2 hours, be cooled to room temperature, with mortar by biological carbon sample
Product grind partial size and are the particle of 0.15~0.25mm, then successively use dehydrated alcohol, NaOH and HCl elution residual to remove pyrolysis
Slag obtains charcoal；
2) charcoal is soaked in 1.0molL-1Hydrochloric acid solution in 1~2h, then elute to neutrality, and in 60~80
DEG C drying 10~15h, preferably 65 DEG C drying 12h；
3) (0.4~2) part charcoal is placed in (1~1.5) part 1.0molL according to mass ratio-1FeCl3Solution
In, preferably 1:1.5, for several times, last 65~85 DEG C dry, preferably for deionized water elution after being uniformly mixed and standing 1~2h
75 DEG C to get iron modification biological charcoal.
Coating uses partial size for the rubble of 10~15mm.Gravel drainage blanket uses partial size for the gravel of 30~45mm.On
The water outlet turned over is connected to gravel drainage blanket, and the height of the water outlet turned over is that gravel draining layer height a+ iron modification biological charcoal is filled out
The 1/5 of the height of the bed of material 4.
Wherein, when flooding area height is 300mm, the present invention is for NO3 -The average removal rate of-N has reached 80% or more.
Charcoal is added in lower part of the present invention, and sufficient carbon source can be provided for denitrification, also can be the attachment and growth of microorganism
Suitable living environment is provided, for NO3 -The removal of-N, compared to adsorption by soil and chemical precipitation, edaphon plays the part of
Drill key player, with the growth of microorganism, the denitrification of soil lower layer clearly, at this point for NO3 -The removal of-N, returns
Function utilizes NO in microorganism3 -- N carries out assimilation and dissimilation.Denitrification enzyme liveness of the present invention is higher.
Wherein, the disengaging water concentration of present invention N under the conditions of difference falls dry spell, when falling dry spell and being increased by 6 days as 7 days,
The present invention is discharged NO3 -- N concentration reduces, NH4 +- N concentration increases, while NO2 -- N concentration increases, this illustrates NO3 -The drop of-N concentration
Low one side is because of the NH adsorbed in filler4 +- N fails to be converted into NO in time3 -On the one hand-N is into water and in filler
NO3 -- N passes through anti-nitration reaction in time and is converted into NO2 -- N and N2.This phenomenon present invention is obvious.In general, with dry
The extension of drought period, especially when the dry spell being longer than 6 days, the present invention is for NO3 -The removal effect of-N is better, this is dry for China
It is particularly important for non-irrigated semiarid zone.
Wherein, when to flood layer height be 1/3 iron modification biological carbon filling material layer height, iron modification biological charcoal of the present invention improvement is filled out
Material can substantially reduce PO4 3-The leaching loss of-P.It is the setting because of flooding area, the anaerobism item that the setting of one side flooding area generates
Part perhaps can cause to dissolve phosphorus and the leaching of subsequent total phosphorus goes out, and is as caused by iron-reducing bacterium, another aspect flooding area is caused
Hypoxia condition be likely to result in the movement and discharge of filtrate intermediate ion key phosphorus, this soil beam from filtrate under anaerobic
The release for tiing up phosphorus has been studied.And the present invention because iron modification biological charcoal improvement so that phosphorus and filler formed it is stronger
Chemical combination key, it is not easily to fall off.
The present invention is in basic, normal, high each area for PO4 3-Shutting off for-P has preferable effect.Wherein, flooding layer height is
When 1/3 iron modification biological carbon filling material layer height, testing column is significant for the removal effect difference of TP, and removal effect is preferable, it was demonstrated that
Iron modification biological charcoal improved packing substantially reduces available phosphorus PO4 3-The leaching loss of-P.Because of the setting of flooding area, one side flooding area
The anaerobic condition that generates of setting the leaching for dissolving phosphorus and subsequent total phosphorus perhaps can be caused to go out so that phosphorus and filler formed it is more firm
Solid chemical combination key, it is not easily to fall off.Hypoxia condition caused by another aspect flooding area is likely to result in the shifting of filtrate intermediate ion key phosphorus
Dynamic and discharge, this release of soil constraint phosphorus has been studied from filtrate under anaerobic.
The present invention controls difference and falls dry spell different tests column inflow and outflow PO4 3-The concentration of-P, each testing column do not occur
PO in filler4 3-The leaching of-P occurs as and with the extension of land dry spell, each testing column is discharged PO4 3-The concentration of-P is in that reduction becomes
Gesture.When falling dry spell and extending to 6 days or more, each testing column is discharged PO4 3-The concentration of-P is not much different, and is below 0.5mgL-1, illustrate for arid climate, the stagnant P effect of present invention biology delaying basin is preferable.
The advantages of basic principles and main features and invention of the invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (10)
1. a kind of biological delaying basin of synchronous denitrification dephosphorizing, which is characterized in that including biological delaying basin ontology, and from top to bottom
The Super High (1) that is distributed in biological delaying basin ontology, flood layer (2), coating (3), iron modification biological carbon filling material layer (4),
Gravel drainage blanket (5) and water outlet (6)；Inspection shaft (8) are equipped in delaying basin ontology, rainwater grid is equipped at the top of inspection shaft (8)
Sub (7), bottom are equipped with overflow water outlet (9), and side wall is connected to water outlet (6)；
The height h of flooding area is that gravel drainage blanket (5) height a is filled out with 1/5 iron modification biological charcoal in the biology delaying basin ontology
The sum of the height b of the bed of material (4)；The height for flooding layer (2) is the height of 1/3 iron modification biological carbon filling material layer (4)；By from delay
The water outlet (6) that pond body bottom portion turns over is collected away from the water outlet for flooding layer at bottom level a+1/5b height；Beyond flooding layer (4)
The rainwater of height, from rain perforaled strainer (7) on inspection well overflow water outlet (9) discharge.
2. a kind of biological delaying basin of synchronous denitrification dephosphorizing according to claim 1, which is characterized in that the modified life of the iron
Charcoal is to be prepared using rice rice husk drying, grinding, slagging-off, de- wash with iron modification in object carbon filling material layer.
3. a kind of biological delaying basin of synchronous denitrification dephosphorizing according to claim 2, which is characterized in that the modified life of the iron
In object carbon filling material layer charcoal the preparation method is as follows:
1) rice rice husk is placed in baking oven, is dried to constant weight at a temperature of 45~50 DEG C, be packed into closed container and be placed in Muffle furnace
It is interior to be cooled to room temperature in 500~600 DEG C of 1~2h of heating, it is ground to partial size and is the particle of 0.15~0.25mm, then successively use
Dehydrated alcohol, NaOH and HCl elution obtain charcoal to remove pyrolysis residue；
2) charcoal is soaked in 1.0molL-1Hydrochloric acid solution in 1~2h, then elute to neutrality, and in 60~80 DEG C dry
Dry 10~15h；
3) 1 part of charcoal is placed in 1.5 parts of 1.0molL according to mass ratio-1FeCl3In solution, it is uniformly mixed and stands 1
For several times, 65~85 DEG C of drying are to get iron modification biological charcoal for deionized water elution after~2h.
4. a kind of biological delaying basin of synchronous denitrification dephosphorizing according to claim 1, which is characterized in that the biology is detained
Super High (1) and layer (2) height h >=150mm is flooded in the ontology of pond.
5. a kind of biological delaying basin of synchronous denitrification dephosphorizing according to claim 1, which is characterized in that the gravel draining
The height of layer (5) is 150~200mm；The height of the iron modification biological carbon filling material layer (4) is 600~800mm；The covering
The height of layer (3) is 100~150mm.
6. a kind of biological delaying basin of synchronous denitrification dephosphorizing according to claim 1, which is characterized in that the coating
(3) use partial size for the rubble of 10~15mm.
7. a kind of biological delaying basin of synchronous denitrification dephosphorizing according to claim 1, which is characterized in that the gravel draining
Layer (5) uses partial size for the gravel of 30~45mm.
8. a kind of biological delaying basin of synchronous denitrification dephosphorizing according to claim 1, which is characterized in that it is described turn over go out
The mouth of a river (6) is connected to gravel drainage blanket (5), and the height of the water outlet turned over is gravel drainage blanket (5) height a+ iron modification biological
The 1/5 of the height of carbon filling material layer (4).
9. a kind of biological delaying basin of synchronous denitrification dephosphorizing according to claim 1, which is characterized in that the biology is detained
Pond ontology further includes plant (10), and the plant (10) is set to the surface of the coating (3).
10. a kind of biological delaying basin of synchronous denitrification dephosphorizing according to claim 1, which is characterized in that the overflow goes out
The mouth of a river (9) efflux time is in 6~48h.
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| CN111302482A (en) * | 2020-03-03 | 2020-06-19 | 北京林业大学 | Biological retention material for synchronously removing nitrogen, phosphorus and pesticides in rainwater runoff and application method |
| CN113216350A (en) * | 2021-01-20 | 2021-08-06 | 宁波大学 | Bioretention pond suitable for coastal sponge city and device and method for optimizing performance of filling medium of bioretention pond |
| CN113371817A (en) * | 2021-06-10 | 2021-09-10 | 北京建筑大学 | Biological retention device and preparation method of magnesium modified biochar for mixed filler of biological retention device |
| CN114505063A (en) * | 2022-02-25 | 2022-05-17 | 西安建筑科技大学 | River and lake bottom mud covering material, preparation method and application |
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