CN101607759A - Biological denitrification method and device for domestic sewage - Google Patents
Biological denitrification method and device for domestic sewage Download PDFInfo
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- CN101607759A CN101607759A CNA2009101815545A CN200910181554A CN101607759A CN 101607759 A CN101607759 A CN 101607759A CN A2009101815545 A CNA2009101815545 A CN A2009101815545A CN 200910181554 A CN200910181554 A CN 200910181554A CN 101607759 A CN101607759 A CN 101607759A
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- 239000010865 sewage Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000006243 chemical reaction Methods 0.000 claims abstract description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 50
- 238000002156 mixing Methods 0.000 claims abstract description 25
- 239000010802 sludge Substances 0.000 claims abstract description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 23
- 229910052760 oxygen Inorganic materials 0.000 claims description 23
- 239000001301 oxygen Substances 0.000 claims description 23
- 238000005273 aeration Methods 0.000 claims description 18
- 238000007599 discharging Methods 0.000 claims description 10
- 210000004744 fore-foot Anatomy 0.000 claims description 8
- 238000012546 transfer Methods 0.000 claims description 5
- CAWXEEYDBZRFPE-UHFFFAOYSA-N Hexazinone Chemical compound O=C1N(C)C(N(C)C)=NC(=O)N1C1CCCCC1 CAWXEEYDBZRFPE-UHFFFAOYSA-N 0.000 claims description 2
- 229920004935 Trevira® Polymers 0.000 claims description 2
- 230000001186 cumulative effect Effects 0.000 claims description 2
- 230000005484 gravity Effects 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 19
- 241000894006 Bacteria Species 0.000 abstract description 13
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 11
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 5
- 230000014759 maintenance of location Effects 0.000 abstract description 3
- 230000001546 nitrifying effect Effects 0.000 abstract 1
- 238000012545 processing Methods 0.000 description 10
- 241000108664 Nitrobacteria Species 0.000 description 9
- 239000002351 wastewater Substances 0.000 description 6
- 244000005700 microbiome Species 0.000 description 5
- 238000010992 reflux Methods 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000004060 metabolic process Effects 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012851 eutrophication Methods 0.000 description 2
- 244000059217 heterotrophic organism Species 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000003643 water by type Substances 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000008557 oxygen metabolism Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
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Abstract
The invention relates to a domestic sewage biological denitrification method and a device. The device consists of a mixing zone, a main reaction zone and a buffer zone, wherein sewage and return water are fully mixed in the mixing zone according to a certain proportion, uniformly enter the main reaction zone, synchronously denitrify and remove COD under the coexistence environment of facultative and aerobic, and then part of free sludge is settled in the buffer zone and discharged. COD in the discharged water is less than or equal to 30mg/L, ammonia nitrogen is less than or equal to 2mg/L, total nitrogen is less than or equal to 10mg/L, and SS is less than or equal to 10 mg/L. The denitrification method of the invention separates the retention time of nitrifying bacteria from the retention time of water power, and takes COD of sewage and partial bacteria autolysate as a denitrification carbon source.
Description
Technical field
The present invention relates to a kind of sanitary sewage biological denitrification method and device of being used for, belong to sewage treatment area.
Background technology
In recent years, the wastewater flow rate that produces owing to human lives's activity in production sharply increases, sanitary sewage is because increasing of town dweller and annual emissions has surpassed 30,000,000,000 tons, the domestic sewage in rural areas by using discharging is also up to the over ten billion ton, produced simultaneously ammonia nitrogen amount increases severely day by day, and supporting sewage treatment facility is owing to be subjected to the restriction of technological design and envrionment conditions to have bigger defective for ammonia nitrogen removal, cause a large amount of ammonia nitrogens to drain into natural water (lake, river etc.), finally become one of reason that causes body eutrophication.The traditional biological denitrification process is oxidized to nitre nitrogen by nitrobacteria with ammonia nitrogen, by denitrifying bacterium nitre nitrogen is reduced to nitrogen then and discharges.Nitrobacteria is a chemosynthetic bacteria, its growth velocity is slow, it is in a disadvantageous position with other heterotrophic microorganism coexistences the time,, thereby has caused the sewage disposal plant effluent ammonia nitrogen concentration higher so the relative populations of nitrobacteria is often very low in the sewage disposal active sludge.And denitrifying bacterium is a heterotrophic organism, and it is under facultative environment, and the metabolism organism is reduced to nitrogen with nitre nitrogen.The combination of processing units such as the most employing of present sewage treatment process is nitrated because the difference of denitrifying bacterium and nitrobacteria growing environment has caused, denitrification, COD oxidation, increased the complicacy of technological operation, and the technology floor space is big, and need add extra carbon source has increased running cost.In some sewage disposal active sludge, find the phenomenon of simultaneous denitrification in recent years, it is nitrification and denitrification reaches denitrogenation simultaneously in same site effect, scholars propose the theoretical and microbiology theory of microenvironment and explain the simultaneous denitrification phenomenon in succession, and develop the efficient that corresponding high efficiency reactor improves simultaneous denitrification, as packed column reactor, membrane bioreactor etc.Above-mentioned reactor mainly relies on the residence time difference of the powerful crown_interception of bacterium being elongated as far as possible mud and sewage, keeps long sludge retention time, thereby the enough nitrobacteria content of assurance mud mesopodium is stablized nitrification efficiency.Yet above-mentioned simultaneous denitrification reactor still needs strict size of regulating dissolved oxygen (DO) in operational process, parameters such as the height of sludge concentration realize well carrying out of simultaneous denitrification, and the removal efficient of total nitrogen (TN) does not often reach gratifying degree.
Summary of the invention
The objective of the invention is in order to improve existing biological denitrification process complexity, nitric efficiency is low, problem such as poor stability and a kind of method and intensification device that is used for the sanitary sewage biological denitrificaion is provided, in order in single reactor, to realize simultaneous denitrification, to remove COD, and need not to add extra carbon source, improve the flexibility of operation of device and the simplification of operational management.
Technical scheme of the present invention is: a kind of sanitary sewage biological denitrification apparatus that is used for, it is characterized in that constituting by mixing zone (I), main reaction region (II), buffer zone (III), the volume ratio that each district is set is respectively 1: 2～4: 0.5～1, mixing zone (I) is separated by baffle plate 12 with main reaction region (II), baffle plate 12 is installed and is lower than device upper edge 10～25cm, baffle plate 12 back mounting guiding board 13; The inner volume ratio according to the zone, front and back of main reaction region (II) is provided with the carrier ball 5 that perforated panel 14 is used for fixing forefoot area, and rear region is installed combined stuffing 6, and combined stuffing 6 belows are provided with aeration tube or aeration plate 7; Main reaction region (II) and buffer zone (III) are separated by baffle plate 11, and baffle plate 9 and swash plate 10 are set in the buffer zone (III), baffle plate 9 mounting distance device upper edge 10～25cm, stretch into device 1/3～1/2 degree of depth place, apart from side 5～25cm; Swash plate 10 is installed on the device degree of depth 1/4～1/3 place, and the swash plate gradient is 50～60 °.
The forefoot area of above-mentioned main reaction region (II) accounts for 1/3～2/3 of reaction zone (II) cumulative volume, the carrier ball 5 of zone filling is PVC or PP carrier ball, and the carrier ball support frame is commercially available plastic grid ball, diameter 8～10cm, the inner trevira silk of filling, loading level is 8～10g/; The rear region of main reaction region (II) is loaded commercially available combined stuffing, and specification is φ 150mm.
The present invention also provides a kind of method of utilizing above-mentioned device to be used for the sanitary sewage biological denitrificaion, its concrete steps are: (I) mixes the current of water inlet pipe 1 and return line 2 in the mixing zone, current flow automatically according to horizontal plug-flow mode and enter main reaction region (II), flow through carrier ball 5 zone and combined stuffing 6 zones successively, carrier ball 5 zones rely on water inlet waterpower mass transfer, combined stuffing 6 zones connect aeration tube by inlet pipe 3 or aeration plate 7 provides oxygen to react, reaction finishes the back and flows into buffer zone (III), behind the free sludge settling, by water shoot 4 discharge waters, wherein the certain proportion discharge water is back to mixing zone I by return line 2; Mud discharging is by shore pipe 8 dischargings.
Water inlet in recirculation water in the preferred return line 2 and the water inlet pipe 1 by volume 1: (I) mixes the backflow ratio of (0.5～3) in the mixing zone.Mixing zone (I), main reaction region (II), buffer zone (III) flow automatically according to horizontal plug-flow mode.NO in the recirculation water
- 3-N mixes laggard forefoot area generation denitrification of going into main reaction region with former water COD, dissolved oxygen 0.2～0.5mg/L, and nitrated and further removal COD, dissolved oxygen 1.5～2.5mg/L take place in the rear region of main reaction region.
Be used for the sanitary sewage biological denitrification method, at first water inlet pipe 1 and return line 2 mix at mixing zone I.Take back the dissolved oxygen levels that has improved whole mixing zone I than high-solubility oxygen owing to recirculation water, help keeping the low dissolved axygen level in main reaction region II forefoot area carrier ball 5 zones, simultaneously recirculation water with strengthened the waterpower mass transfer in main reaction region II carrier ball 5 zones after raw waste water mixes and reduced the load impact of main reaction region II.Mix preceding/zone generation denitrification that back sewage enters main reaction region II, dissolved oxygen 0.2～0.5mg/L is a carbon source with COD in the raw waste water and part bacterium autolyzate, the NO in the recirculation water
- 3-N is an electron acceptor(EA).The remaining COD of nitrated and further removal takes place in the rear region of main reaction region II, dissolved oxygen 1.5～2.5mg/L, combined stuffing 6 biofilm enrichment nitrobacterias and other heterotrophic bacterias.Reaction finishes the back and flows into buffer zone III, and the sedimentation mud that dissociate is behind the carrier ball 5 of process main reaction region II and the sludge immobilization of combined stuffing 6, free sludge concentration is very low, through the sedimentation of buffer zone III, make water outlet SS≤10mg/L, excess sludge is through shore pipe 8 dischargings.
After the said process processing, final discharge water COD≤30mg/L, ammonia nitrogen≤2mg/L, total nitrogen≤10mg/L, SS≤10mg/L.
The present invention is used for the sanitary sewage biological denitrification method and device can be processed as outfit, is suitable for dispersed domestic sewage in rural areas by using processing or urban community sanitary sewage and disperses the property processing, and floor space is little, installs not limited by landform and geologic agent.One of central authorities' in-depth reform open-development target is to accelerate the construction of town and country, rural area and carry out new countryside construction in a deep going way, and the living environment and the sewage disposal that wherein improve the rural area are one of vital tasks.The contradiction of domestic sewage in rural areas by using pollution and corresponding improvement is very outstanding, whole nation domestic sewage in rural areas by using annual emissions over ten billion ton, the most of rural areas of China all do not have discharge conduit and Sewage treatment systems at present, most of sanitary sewage is arbitrarily discharging all, directly enter the river, or permeate the ground arbitrarily after discharging outdoor vacant lot, small part permeates the ground after the septic tank simple process, severe contamination river course, reservoir, lake and underground well water, aggravate body eutrophication, thereby had influence on resident's orthobiosis water.Therefore the present invention is used for sanitary sewage biological denitrification method and device because characteristics such as its occupation of land face is little, processing efficiency is high, stable, flexible operation are highly suitable for dispersed domestic sewage in rural areas by using handles.Outfit can be used as product and carries out market sale, and can be according to requirement of client customization processing.Also can be applicable to the transformation of existing sewage disposal bigger device, on the architecture basics of existing sewage treatment facility, carry out simple purpose transformation, reduce process cost to improve nitric efficiency.The present invention is used for the sanitary sewage biological denitrification method and device has been developed the equipment of having processed serial scale, and has been applied to domestic sewage in rural areas by using processing (scale 200～300 families).
Beneficial effect:
1) reaction unit compact construction, the waterpower reaction conditions is good.Recirculation water mixes the back with raw waste water and flows automatically by main reaction region, buffer zone according to horizontal plug-flow mode in the mixing zone.Recirculation water is taken back than high-solubility oxygen and has been improved the dissolved oxygen levels of whole mixing zone, after entering main reaction region, the dissolved oxygen that brings helps keeping the low dissolved axygen level in main reaction region carrier ball zone, guarantees that this zone is in stable facultative environment, helps denitrifyingly well carrying out.Recirculation water with have certain diluting effect after raw waste water mixes, the organic loading that has reduced main reaction region impacts, and mixes laggard water flow velocity of going into main reaction region simultaneously and improves, and has improved the waterpower mass transfer in carrier ball zone, improves reaction efficiency.The buffer zone current are in laminar flow regime, guarantee the good sedimentation of free mud.
2) microbe species is abundant, and metabolic process is perfect.Mixing back sewage enters main reaction region carrier ball zone denitrification takes place, owing to control carrier ball zone dissolved oxygen levels at 0.2～0.5mg/L, the aerobic pathways metabolism of a large amount of heterotrophic organisms is suppressed, and forces to turn to NO
- 3-N is an electron acceptor(EA), is carbon source by COD in the raw waste water and part bacterium autolyzate, carries out denitrification.Enter the combined stuffing zone, dissolved oxygen levels is higher, at 1.5～2.5mg/L, mainly based on nitrobacteria and other heterotrophic bacterias, has carried out oxygen metabolism, nitration reaction takes place and further remove COD.
3) dissimilar carrier combinations constitute microbial immobilized pattern.According to the metabolic characteristic of denitrifying bacterium, nitrobacteria and other heterotrophic microorganisms, more help its growth inside breeding with carrier ball as the fixation support of denitrifying bacterium at carrier ball, reduce the impact of dissolved oxygen.Nitrobacteria and aerobic heterotrophic microorganism be by the surface growth of combined stuffing diversity propagation, contacts with oxygen easilier, stablizes metabolic process.Because the well securedization effect of combination carrier has realized the mud-water separation in the reactor, prolonged the residence time of microorganism, stablize the operation of system, and made the amount of free microorganism significantly reduce, helped the normal operation and the lower SS content of water outlet of buffer zone.
4) apparatus of the present invention can be processed as outfit.Be suitable for dispersed domestic sewage in rural areas by using processing or urban community sanitary sewage and disperse the property processing, floor space is little, installs not limited by landform and geologic agent.Outfit can be used as product and carries out market sale, and can be according to requirement of client customization processing.
5) apparatus of the present invention can be applicable to the transformation of existing sewage disposal bigger device.On the architecture basics of existing sewage treatment facility, carry out simple purpose transformation, as adding carrier or combined stuffing, increase effluent recycling pipeline, design inner partition wall or the like, thereby improve nitric efficiency, reduce process cost.
Description of drawings
Fig. 1 is that the present invention is used for sanitary sewage biological denitrification method and schematic representation of apparatus, wherein
1---water inlet pipe; 2---return line; 3---inlet pipe; 4---rising pipe; 5---carrier ball;
6---combined stuffing; 7---aeration tube or aeration plate; 8---shore pipe; 9---baffle plate;
10---swash plate; 11---baffle plate; 12---baffle plate; 13---flow deflector; 14---perforated panel
I---mixing zone; II---main reaction region; III---buffer zone.
Embodiment
Embodiment 1: be used for the sanitary sewage biological denitrification apparatus mixing zone (I), main reaction region (II), buffer zone (III) are set, the volume ratio in each district is 1: (2～4): (0.5～1).Mixing zone (I) is separated by baffle plate 12 with main reaction region (II), no special construction in the mixing zone, baffle plate 12 back mounting guiding board 13.The inner volume ratio according to the zone, front and back of main reaction region (II) is provided with perforated panel 14, and opening diameter is used for fixing the carrier ball 5 of forefoot area less than 8～10cm, and rear region is installed combined stuffing 6, and combined stuffing 6 belows are provided with aeration tube or aeration plate 7.Main reaction region (II) and buffer zone (III) are separated by baffle plate 11, and baffle plate 9 and swash plate 10 are set in the buffer zone (III), baffle plate (9) mounting distance device upper edge 10～25cm, stretch into device 1/3～1/2 degree of depth place, apart from side 5～25cm.Swash plate (10) is installed on the device degree of depth 1/4～1/3 place, and the swash plate gradient is 50～60 °.
The device operational scheme that is used for the sanitary sewage biological denitrificaion is: water inlet pipe 1 and return line 2 (reflux ratio 1: (0.5～3)) mix at mixing zone I, current flow automatically according to horizontal plug-flow mode and enter main reaction region II, flow through carrier ball 5 zone and combined stuffing 6 zones successively, carrier ball 5 zones rely on water inlet waterpower mass transfer, and combined stuffing 6 zones connect aeration tube by inlet pipe 3 or aeration plate 7 provides oxygen.Reaction finishes the back and flows into buffer zone III, and behind the small-amount free sludge settling, by water shoot 4 discharge waters, wherein partial discharge water is back to mixing zone I by return line 2.Mud discharging is by shore pipe 8 dischargings.
Embodiment 2: the volume ratio in zone, device main reaction region II front and back 1: 2, the dissolved oxygen in zone, front and back is respectively 0.2mg/L and 1.5mg/L, influent ammonium concentration 50mg/L, COD 250mg/L, TN concentration 72mg/L, reflux ratio 0.5: 1, final outflow water ammonia nitrogen concentration 1.4mg/L, COD 24mg/L, TN concentration 8mg/L, SS8mg/L.The clearance of ammonia nitrogen, COD, TN is respectively 97.2%, 90.4%, and 88.9%.
Embodiment 3: the volume ratio in zone, device main reaction region II front and back 1: 1, the dissolved oxygen in zone, front and back is respectively 0.3mg/L and 1.9mg/L, influent ammonium concentration 52mg/L, COD 265mg/L, TN concentration 79mg/L, reflux ratio 1: 1, final outflow water ammonia nitrogen concentration 1.8mg/L, COD 27mg/L, TN concentration 8.2mg/L, SS10mg/L.The clearance of ammonia nitrogen, COD, TN is respectively 96.5%, 89.8%, and 89.6%.
Embodiment 4: the volume ratio in zone, device main reaction region II front and back 2: 1, the dissolved oxygen in zone, front and back is respectively 0.4mg/L and 2.5mg/L, influent ammonium concentration 62mg/L, COD 258mg/L, TN concentration 83mg/L, reflux ratio 2: 1, final outflow water ammonia nitrogen concentration 1.7mg/L, COD 28mg/L, TN concentration 8.6mg/L, SS9mg/L.The clearance of ammonia nitrogen, COD, TN is respectively 97.3%, 89.1%, and 89.6%.
Embodiment 5: the volume ratio in zone, device main reaction region II front and back 1: 2, the dissolved oxygen in zone, front and back is respectively 0.5mg/L and 2.5mg/L, influent ammonium concentration 43mg/L, COD 309mg/L, TN concentration 59mg/L, reflux ratio 3: 1, final outflow water ammonia nitrogen concentration 0.6mg/L, COD 23mg/L, TN concentration 7.2mg/L, SS9mg/L.The clearance of ammonia nitrogen, COD, TN is respectively 98.6%, 92.6%, and 87.8%.
Claims (7)
1. a sanitary sewage biological denitrification apparatus is characterized in that being made of mixing zone (I), main reaction region (II) and buffer zone (III), and the volume ratio that each district is set is respectively 1: (2～4): (0.5～1); Mixing zone (I) is separated by baffle plate (12) with main reaction region (II), and baffle plate (12) is installed and is lower than device upper edge 10～25cm, baffle plate (12) back mounting guiding board (13); The inner volume ratio according to the zone, front and back of main reaction region (II) is provided with the carrier ball (5) that perforated panel (14) is used for fixing forefoot area, and rear region is installed combined stuffing (6), and combined stuffing (6) below is provided with aeration tube or aeration plate (7); Main reaction region (II) is separated by baffle plate (11) with buffer zone (III), and baffle plate (9) and swash plate (10) are set in the buffer zone (III); Baffle plate (9) mounting distance device upper edge 10～25cm, stretch into device 1/3～1/2 degree of depth place, apart from side 5～25cm; Swash plate (10) is installed on the device degree of depth 1/4～1/3 place, and the swash plate gradient is 50～60 °.
2. device according to claim 1, the forefoot area that it is characterized in that main reaction region (II) accounts for 1/3～2/3 of reaction zone (II) cumulative volume, the carrier ball 5 of zone filling is PVC or PP carrier ball, the carrier ball support frame is commercially available plastic grid ball, diameter 8～10cm, the inner trevira silk of filling, loading level is 8～10g/; The rear region of main reaction region (II) is loaded commercially available combined stuffing, and specification is φ 150mm.
3, device according to claim 1 is characterized in that water inlet pipe (1) from the water inlet of device upper edge, and return line (2) is connected outside installing with water inlet pipe (1); According to device gravity flow principle, water shoot (4) is lower than water inlet pipe (1) 15～25cm, and inlet pipe (3) enters with the aeration tube or the aeration plate (7) in combined stuffing district along the device vertical direction and is connected.
4, a kind of method of utilizing the described device of claim 1 to be used for the sanitary sewage biological denitrificaion, its concrete steps are: (I) mixes the current of water inlet pipe 1 and return line 2 in the mixing zone, current flow automatically according to horizontal plug-flow mode and enter main reaction region (II), flow through carrier ball 5 zone and combined stuffing 6 zones successively, carrier ball 5 zones rely on water inlet waterpower mass transfer, combined stuffing 6 zones connect aeration tube by inlet pipe 3 or aeration plate 7 provides oxygen to react, reaction finishes the back and flows into buffer zone (III), behind the free sludge settling, by water shoot (4) discharge water, wherein discharge water is back to mixing zone I by return line (2); Mud discharging is by shore pipe (8) discharging.
5, method according to claim 4, it is characterized in that with return line 2 in recirculation water and the water inlet of water inlet pipe 1 be by volume 1: 0.5～3 in the mixing zone (I) mixes.
6. method according to claim 4 is characterized in that mixing zone (I), main reaction region (II), buffer zone (III) flow automatically according to horizontal plug-flow mode.
7. method according to claim 4 is characterized in that the NO in the recirculation water
- 3-N mixes laggard forefoot area generation denitrification of going into main reaction region with former water COD, dissolved oxygen 0.2～0.5mgL, and nitrated and further removal COD, dissolved oxygen 1.5～2.5mg/L take place in the rear region of main reaction region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101815545A CN101607759A (en) | 2009-07-28 | 2009-07-28 | Biological denitrification method and device for domestic sewage |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2009101815545A CN101607759A (en) | 2009-07-28 | 2009-07-28 | Biological denitrification method and device for domestic sewage |
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| CN101607759A true CN101607759A (en) | 2009-12-23 |
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| CNA2009101815545A Pending CN101607759A (en) | 2009-07-28 | 2009-07-28 | Biological denitrification method and device for domestic sewage |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102086080A (en) * | 2010-12-30 | 2011-06-08 | 河海大学 | Water treatment method and device based on photoautotroph film |
| CN107055752A (en) * | 2017-05-02 | 2017-08-18 | 广东工业大学 | A kind of biofilm reactor |
-
2009
- 2009-07-28 CN CNA2009101815545A patent/CN101607759A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102086080A (en) * | 2010-12-30 | 2011-06-08 | 河海大学 | Water treatment method and device based on photoautotroph film |
| CN102086080B (en) * | 2010-12-30 | 2013-06-05 | 河海大学 | Water treatment method and device based on photoautotroph film |
| CN107055752A (en) * | 2017-05-02 | 2017-08-18 | 广东工业大学 | A kind of biofilm reactor |
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