CN208038125U - The device of total nitrogen in a kind of removal sewage - Google Patents

The device of total nitrogen in a kind of removal sewage Download PDF

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Publication number
CN208038125U
CN208038125U CN201820181408.7U CN201820181408U CN208038125U CN 208038125 U CN208038125 U CN 208038125U CN 201820181408 U CN201820181408 U CN 201820181408U CN 208038125 U CN208038125 U CN 208038125U
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dbr
total nitrogen
filler
interior
aerobic tank
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谢迎辉
王学科
吴建光
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New Ingegneria Ambientale Srl In Tianjin One
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New Ingegneria Ambientale Srl In Tianjin One
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Abstract

The utility model provides a kind of device removing total nitrogen in sewage, including anoxic pond, aerobic tank, interior reflux pump, aerator, DBR reactors, for municipal sewage plant total nitrogen poor removal effect, it is high to be discharged total nitrogen, interior return flow is big, high energy consumption, add the problem that carbon source causes operating cost high, do not add carbon source and using it is smaller it is interior reflux, even without interior reflux in the case of, depth remove COD, total phosphorus, total nitrogen, make water outlet total nitrogen≤10mg/L.

Description

The device of total nitrogen in a kind of removal sewage
Technical field
The utility model is related to a kind of devices of total nitrogen in sewage treatment field more particularly to removal sewage.
Background technology
Biological wastewater treatment can with the organic matter and nutrient nitrogen and phosphorus in steady removal waste water, be it is most economical effectively The dirty Organic substance in water of removal method, there are about 60% or more organic matter be to be removed by bioanalysis, and give up in municipal sewage Nitrogen in water can only generally rely on bioanalysis to remove.It is using life that built municipal sewage plant, which has 90% or more, in the world Object facture.
Total nitrogen in sewage includes ammonia nitrogen, organic nitrogen, nitrate nitrogen, nitrite nitrogen, and organic nitrogen is changed by aminating reaction Ammonia nitrogen, ammonia nitrogen are changed into nitrate nitrogen or nitrite nitrogen by nitration reaction, and nitrite nitrogen is changed into nitrate nitrogen by nitration reaction, Final nitrate nitrogen is changed into nitrogen by anti-nitration reaction, realizes the removal of total nitrogen in sewage, still, this transition process is very It is long.Traditional activated sludge process needs larger interior reflux to realize nitrification, denitrification process, and operating cost is high, and to total nitrogen Removal effect is limited, it is difficult to further increase, water outlet total nitrogen always cannot be up to standard.General sewage effluents total nitrogen is on the left sides 20mg/L The right side, by largely flowing back, adding the modes such as carbon source, just can will the control of water outlet total nitrogen less than 15mg/L, but fluctuate it is larger, and It is costly to add carbon source, carbon source expense used in one ton of water is 0.5 yuan, by taking 10,000 tpds of medium-sized sewage treatment plant as an example, daily The expense for adding carbon source is up to 5000 yuan, 1000 yuan of interior reflux pump institute power consumption expense.
Invention content
The utility model provides a kind of device removing total nitrogen in sewage, for municipal sewage plant total nitrogen removal effect Difference, water outlet total nitrogen is high, and interior return flow is big, high energy consumption, the problem that carbon source causes operating cost high is added, using DBR reactors (Baffle type biological membrane reactor, Diversion Biomembra Reactor), by aerobic tank be divided into activated sludge region and DBR reactor areas, do not add carbon source and using smaller interior reflux, even without interior reflux in the case of, it is removal COD, total Phosphorus, total nitrogen make water outlet total nitrogen≤10mg/L.
The technical solution adopted in the utility model is:
The device of total nitrogen in a kind of removal sewage, including sequentially connected pretreatment system, DBR systems and precipitation reflux system System, the DBR systems include anoxic pond(1), aerobic tank(2)With interior reflux pump(3), the anoxic pond(1)In be equipped with stirring dress It sets, the aerobic tank(2)Equipped with an aerator(4)With secondary aerator(5), the aerobic tank(2)Middle fixed installation Several DBR reactors(6), the anoxic pond(1)Import be connected with the outlet of pretreatment system, the aerobic tank(2) Import and the anoxic pond(1)Outlet be connected, the interior reflux pump(3)Import and the aerobic tank(2)Outlet It is connected, the interior reflux pump(3)Outlet and the anoxic pond(1)Import be connected;The precipitation return-flow system includes Sedimentation basin(7)And external reflux pump(8), the sedimentation basin(7)Import and the aerobic tank(2)Outlet be connected, it is described outer Reflux pump(8)Import and the sedimentation basin(7)Mud outlet end be connected, the external reflux pump(8)Outlet and the anoxic Pond(1)Import be connected.
Further, the DBR reactors(6)By reactor frame(9), packing cavity(10), filler(11)Composition, it is described Packing cavity(10)It is fixed on the reactor frame(9)On, the filler(11)Positioned at the packing cavity(10)It is interior.
Further, further include internal dissolved oxygen meter(12), dissolved outside oxygen analyzer(13)It is filled with aeration control It sets(14), the internal dissolved oxygen meter(12)Positioned at the packing cavity(10)It is interior, the dissolved outside oxygen analyzer(13) Positioned at the packing cavity(10)Outside, the aeration control device(14)Respectively with the internal dissolved oxygen meter(12), it is external Dissolved oxygen meter(13)With an aerator(4)It is connected.
Further, the filler(11)For composite filling, 3 D elastic filler, porous suspended ball filler, active bio One kind in filler.
Further, the filler(11)Specific surface area>1000m2/m3
Further, the DBR reactors(6)Packing density be 20% ~ 60%.
Further, the anoxic pond(1)It is interior to be equipped with several DBR reactors(6).
Further, the anoxic pond(1)Interior DBR reactors(6)Bottom be equipped with aerator(15).
The sewage water treatment method of the device of total nitrogen in a kind of removal sewage, which is characterized in that there are following steps:
(a)Sewage is after pretreatment system is handled, into the anoxic pond of DBR systems(1), carry out anti-nitration reaction;
(b)Sewage after anti-nitration reaction enters the aerobic tank of DBR systems(2), with aerobic tank(2)In it is aerobic micro- Biological carries out biological respinse and removes COD, and carries out nitration reaction and convert ammonia state to nitrate nitrogen, with filler(11)Internal layer Anaerobe contact carries out anti-nitration reaction and converts nitrate nitrogen to nitrogen removal, aerobic tank(2)Sludge solutions be back to Anoxic pond(1)In, regurgitant volume is 0% ~ 50%;
(c)Aerobic tank(2)Water outlet enter sedimentation basin(4), the sludge in sedimentation basin is back to anoxic by external reflux pump Pond(1)In, regurgitant volume is 20% ~ 100%.
Further, internal dissolved oxygen meter(12)With dissolved outside oxygen analyzer(13)The dissolved oxygen data monitored Feed back to aeration control device(14), aeration control device(14)Secondary aerator is controlled according to the dissolved oxygen data of feedback (5)Switch, when internal dissolved oxygen meter(12)When monitoring data are less than 2mg/L, secondary aerator is opened(5), when outer Portion's dissolved oxygen meter(13)When monitoring data are more than 4mg/L, secondary aerator is closed(5).
The beneficial effects of the utility model are:
1, the total nitrogen in the water inlet of general municipal wastewater is largely ammoniacal nitrogen, and nitrate nitrogen content is very low, and in processing stream Anaerobism or anoxic treatment are first carried out in journey, then carry out Aerobic Process for Treatment.Ammoniacal nitrogen is changed into nitrate nitrogen, nitre in Aerobic State nitrogen is changed into nitrogen during anaerobism or anoxic treatment, therefore, certainly will need the dirt after the Aerobic Process for Treatment by larger flow Water is back to anaerobism section or anoxic section, to ensure the removal of total nitrogen in sewage.General municipal sewage plant aerobic section is back to anaerobism The regurgitant volume of section or anoxic section is 100% ~ 300%, and regurgitant volume is very big, therefore the power consumption of reflux pump is also larger.The utility model The biomembrane of DBR reactor areas is in microbial cultivation process, and internal microorganism is anaerobe, and external microbial is preferably Oxygen animalcule ensures the total amount of anaerobe by controlling the dissolved oxygen concentration of DBR reactor areas, and nitrate nitrogen can be DBR system realms are removed, and ammoniacal nitrogen can be nitrate nitrogen in the activated sludge regions transform of DBR systems, due to aerobic The aeration agitation in pond acts on, and sewage ceaselessly flows in activated sludge region and DBR reactor areas, therefore, in DBR systems In aerobic tank, total nitrogen is removed, and does not need interior reflux.When influent ammonium concentration is excessively high, reflux in certain is suitably given, but It is interior regurgitant volume < 50%, is significantly smaller than the interior regurgitant volume of 100% ~ 300% in traditional treatment method.
2, as described above, the regurgitant volume that general municipal sewage plant aerobic section is back to anaerobism section or anoxic section be 100% ~ 300%, but even if regurgitant volume is very big, aerobic tank still has that part nitrate nitrogen does not flow back into anaerobism section or anoxic section is just discharged Oxygen pond, therefore, the water outlet total nitrogen of general municipal sewage plant are higher.Sewage in the utility model aerobic tank is ceaselessly active dirty Mud region and the flowing of DBR reactor areas, ensure that the nitrate nitrogen changed by ammonia nitrogen has enough time to be contacted with anaerobe, Therefore total nitrogen removal effect is good, is discharged total nitrogen≤10mg/L.
3, since the interior regurgitant volume of general municipal sewage plant is larger, and carbon source is less in return water, but anti-nitration reaction needs A certain amount of carbon source is wanted, therefore, it is necessary to add additional carbon to ensure being normally carried out for anti-nitration reaction.On the one hand, carbon is added Source increases operating cost, on the other hand, adds carbon source and increases system COD processing loads.As described above, reflux in the utility model It measures small, it might even be possible to which, without interior reflux, most of nitrate nitrogen is to be able to remove in the DBR reactor areas of aerobic tank, good Having always in oxygen pond into water supplementary carbon source, carbon source is sufficient, and aeration agitation makes carbon source be continuously replenished in DBR reactor areas, It therefore, there is no need to add carbon source again.Further, since anti-nitration reaction is largely consumed into the organic carbon in water, therefore it is discharged COD Lower, effluent quality is more preferable.
4, the DBR reactors of the utility model are easy for installation, carried out using the existing pond body of municipal sewage plant and facility Transformation, saves operating cost, and effluent quality is more preferable after transformation.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property It puts, other drawings may also be obtained based on these drawings.
Fig. 1 is the flow chart of the device of total nitrogen in a kind of removal sewage of the utility model;
Fig. 2 is the aerobic tank front view of the device embodiment one of total nitrogen in a kind of removal sewage of the utility model;
Fig. 3 is the aerobic tank front view of the device embodiment two of total nitrogen in a kind of removal sewage of the utility model;
Fig. 4 is the aerobic tank front view of the device embodiment three of total nitrogen in a kind of removal sewage of the utility model;
Fig. 5 is the anoxic pond front view of the device embodiment four of total nitrogen in a kind of removal sewage of the utility model.
In figure:1- anoxic ponds, 2- aerobic tanks, reflux pump in 3-, aerator of 4-, No. bis- aerators of 5-, 6-DBR Reactor, 7- sedimentation basins, 8- external reflux pumps, 9- reactor frames, 10- packing cavities, 11- fillers, 12- inside DO determinations Instrument, 13- dissolved outside oxygen analyzers, 14- aeration control devices.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts The every other embodiment obtained, shall fall within the protection scope of the present invention.
The technical solution adopted in the utility model is:
The device of total nitrogen in a kind of removal sewage, including sequentially connected pretreatment system, DBR systems and precipitation reflux system System, the DBR systems include anoxic pond 1, aerobic tank 2 and interior reflux pump 3, and agitating device is equipped in the anoxic pond 1, described good Oxygen pond 2 is equipped with an aerator 4 and secondary aerator 5, several DBR reactors 6 are fixedly mounted in the aerobic tank 2, The import of the anoxic pond 1 is connected with the outlet of pretreatment system, and the import of the aerobic tank 2 goes out with the anoxic pond 1 Mouth is connected, and the import of the interior reflux pump 3 is connected with the outlet of the aerobic tank 2, the outlet of the interior reflux pump 3 and institute The import for stating anoxic pond 1 is connected;The precipitation return-flow system includes sedimentation basin 7 and external reflux pump 8, the sedimentation basin 7 into Mouth is connected with the outlet of the aerobic tank 2, and the import of the external reflux pump 8 is connected with the mud outlet end of the sedimentation basin 7, institute The outlet for stating external reflux pump 8 is connected with the import of the anoxic pond 1.
Further, the DBR reactors 6 are made of reactor frame 9, packing cavity 10, filler 11, the packing cavity 10 It is fixed in the reactor frame 9, the filler 11 is located in the packing cavity 10.
Further, further include internal dissolved oxygen meter 12, dissolved outside oxygen analyzer 13 and aeration control device 14, The internal dissolved oxygen meter 12 is located in the packing cavity 10, and the dissolved outside oxygen analyzer 13 is located at the packing cavity Outside 10, the aeration control device 14 respectively with the internal dissolved oxygen meter 12, dissolved outside oxygen analyzer 13 and primary Aerator 4 is connected.
Further, the filler 11 is composite filling, 3 D elastic filler, porous suspended ball filler, active bio are filled out One kind in material.
Further, the specific surface area of the filler 11>1000m2/m3
Further, the packing density of the DBR reactors 6 is 20% ~ 60%.
Further, several DBR reactors 6 are equipped in the anoxic pond 1.
Further, the bottom of DBR reactors 6 is equipped with aerator 15 in the anoxic pond 1.
The sewage water treatment method of the device of total nitrogen in a kind of removal sewage, which is characterized in that there are following steps:
(a)Sewage, into the anoxic pond of DBR systems, carries out anti-nitration reaction after pretreatment system is handled;
(b)Sewage after anti-nitration reaction enters the aerobic tank of DBR systems, is connect with the aerobic microbiological in aerobic tank It touches and carries out biological respinse removal COD, and carry out nitration reaction and convert ammonia state to nitrate nitrogen, the anaerobe with filler internal layer Contact carries out anti-nitration reaction and converts nitrate nitrogen to nitrogen removal, and the sludge solutions of aerobic tank are back in anoxic pond, are flowed back Amount is 0% ~ 50%;
(c)The water outlet of aerobic tank enters sedimentation basin, and the sludge in sedimentation basin is back to by external reflux pump in anoxic pond, returns Flow is 20% ~ 100%.
Further, the dissolved oxygen data feedback that internal dissolved oxygen meter and dissolved outside oxygen analyzer monitor to expose Gas control device, aeration control device control the switch of secondary aerator according to the dissolved oxygen data of feedback, when inside is dissolved When oxygen analyzer monitoring data are less than 2mg/L, secondary aerator is opened, when dissolved outside oxygen analyzer monitoring data are more than When 4mg/L, secondary aerator is closed.
Embodiment 1
Certain sanitary sewage, pretreated sewage enter the anoxic pond of DBR systems, and the sewage of anoxic pond outflow enters DBR The aerobic tank of system, the DBR reactors in aerobic tank are fixedly mounted on pool bottom, and the filler of DBR reactors is stereo-elastic The specific surface area of filler, the filler is 1000m2/m3, packing density of the DBR reactors in aerobic tank is 20%, and control DBR is anti- It is 2mg/L to answer device region soluble oxygen concentration, and control aerobic tank activated sludge region soluble oxygen concentration is 1.5mg/L, interior regurgitant volume It is 0%, exteenal reflux amount is 50%.Water-in and water-out index is as shown in the table.
Embodiment 2
Certain sanitary sewage, pretreated sewage enter the anoxic pond of DBR systems, and the sewage of anoxic pond outflow enters DBR The aerobic tank of system, the DBR reactors in aerobic tank are fixedly mounted on pool bottom, and the filler of DBR reactors is porous suspended The specific surface area of ball filler, the filler is 2000m2/m3, porous suspended ball filler fills up entire packing cavity, and DBR reactors are good Packing density in oxygen pond is 40%, and control DBR reactor area dissolved oxygen concentrations are 3.0mg/L, control aerobic tank activated sludge Region soluble oxygen concentration is 2.5mg/L, and interior regurgitant volume is 20%, and exteenal reflux amount is 100%.Water-in and water-out index is as shown in the table.
Embodiment 3
Certain sanitary sewage, pretreated sewage enter the anoxic pond of DBR systems, and the sewage of anoxic pond outflow enters DBR The aerobic tank of system, the DBR reactors in aerobic tank are fixedly mounted at the top of pond body, and the filler of DBR reactors is porous suspended The specific surface area of ball filler, the filler is 3000m2/m3, 2/3 space of porous suspended ball filler filling packing cavity, DBR reactors Packing density in aerobic tank is 60%, and control DBR reactor area dissolved oxygen concentrations are 4mg/L, and control aerobic tank activity is dirty Mud region soluble oxygen concentration is 3mg/L, and interior regurgitant volume is 50%, and exteenal reflux amount is 20%.Water-in and water-out index is as shown in the table.
Embodiment 4
DBR reactors are fixedly mounted in anaerobic pond bottom in certain municipal sewage plant, and installation loading is 20%, aerobic DBR reactors are fixedly mounted in bottom of pond portion, and the filler of packing density 50%, DBR reactors is hydroformylation fiber combinations filler, this is filled out The specific surface area of material is 5000m2/m3, the control DBR reactor area dissolved oxygen concentrations of DBR reactors are 3.5mg/L, are controlled Oxygen pond activated sludge region soluble oxygen concentration is 2mg/L, and pretreated sewage enters anoxic pond, the sewage of anoxic pond outflow into Enter aerobic tank, interior regurgitant volume is reduced to 40% from 100%.Before and after installing DBR reactors, system water-in and water-out index is as shown in the table.

Claims (8)

1. the device of total nitrogen in a kind of removal sewage, including sequentially connected pretreatment system, DBR systems and precipitation reflux system System, which is characterized in that the DBR systems include anoxic pond(1), aerobic tank(2)With interior reflux pump(3), the anoxic pond(1)In Equipped with agitating device, the aerobic tank(2)Equipped with an aerator(4)With secondary aerator(5), the aerobic tank(2) Middle several DBR reactors of fixed installation(6), the anoxic pond(1)Import be connected with the outlet of pretreatment system, it is described Aerobic tank(2)Import and the anoxic pond(1)Outlet be connected, the interior reflux pump(3)Import and the aerobic tank (2)Outlet be connected, the interior reflux pump(3)Outlet and the anoxic pond(1)Import be connected;The precipitation reflux System includes sedimentation basin(7)And external reflux pump(8), the sedimentation basin(7)Import and the aerobic tank(2)Outlet be connected It connects, the external reflux pump(8)Import and the sedimentation basin(7)Mud outlet end be connected, the external reflux pump(8)Outlet with The anoxic pond(1)Import be connected.
2. the device of total nitrogen in a kind of removal sewage according to claim 1, which is characterized in that the DBR reactors(6) By reactor frame(9), packing cavity(10), filler(11)Composition, the packing cavity(10)It is fixed on the reactor frame(9) On, the filler(11)Positioned at the packing cavity(10)It is interior.
3. the device of total nitrogen in a kind of removal sewage according to claim 2, which is characterized in that further include internal dissolved oxygen Analyzer(12), dissolved outside oxygen analyzer(13)And aeration control device(14), the internal dissolved oxygen meter(12)Position In the packing cavity(10)It is interior, the dissolved outside oxygen analyzer(13)Positioned at the packing cavity(10)Outside, the aeration control Device(14)Respectively with the internal dissolved oxygen meter(12), dissolved outside oxygen analyzer(13)With an aerator(4) It is connected.
4. the device of total nitrogen in a kind of removal sewage according to claim 2, which is characterized in that the filler(11)For group Close one kind in filler, 3 D elastic filler, porous suspended ball filler, Active biological filler.
5. the device of total nitrogen in a kind of removal sewage according to claim 2, which is characterized in that the filler(11)Ratio Surface area>1000m2/m3
6. the device of total nitrogen in a kind of removal sewage according to claim 1, which is characterized in that the DBR reactors(6) Packing density be 20% ~ 60%.
7. the device of total nitrogen in a kind of removal sewage according to claim 1, which is characterized in that the anoxic pond(1)It is interior Equipped with several DBR reactors(6).
8. the device of total nitrogen in a kind of removal sewage as claimed in claim 7, which is characterized in that the anoxic pond(1)Interior DBR Reactor(6)Bottom be equipped with aerator(15).
CN201820181408.7U 2018-02-02 2018-02-02 The device of total nitrogen in a kind of removal sewage Active CN208038125U (en)

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