CN202785804U - Orbal oxidation ditch device for removing nitrogen and phosphorus from sewage - Google Patents
Orbal oxidation ditch device for removing nitrogen and phosphorus from sewage Download PDFInfo
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- CN202785804U CN202785804U CN 201220326084 CN201220326084U CN202785804U CN 202785804 U CN202785804 U CN 202785804U CN 201220326084 CN201220326084 CN 201220326084 CN 201220326084 U CN201220326084 U CN 201220326084U CN 202785804 U CN202785804 U CN 202785804U
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Abstract
The utility model provides an Orbal oxidation ditch device for removing nitrogen and phosphorus from sewage. The device comprises three concentric oval ditches which are an outer ditch, an intermediate ditch and an inner ditch from outside to inside in sequence, wherein the ditches are separated by partition walls; the partition walls are provided with orifices for communicating the inner and outer ditches; the outer ditch is provided with at least a disk aerator; an area is formed between the adjacent disk aerators; feed pipelines are connected in the first area and the last area; each area is divided into a carrier area and an anaerobic area; and polystyrene carriers are distributed in the carrier areas. The Orbal oxidation ditch device has the beneficial effects that the feed mode is changed to step feed, thus solving the problem of insufficient carbon source; and as soft polystyrene which can swing along with the flow state of water is adopted as the carrier, the Orbal oxidation ditch device is conductive to improving the treatment effect of the oxidation ditch, is convenient to clean, has the advantages of the activated sludge process and the biofilm process, is beneficial to sewage purification, improves the nitrification effect and has a good nitrogen and phosphorus removal effect.
Description
Technical field
The utility model relates to a kind of oxidation ditch device that is applicable to sewage is carried out synchronous denitrification dephosphorizing, belongs to the sewage purification technology field.
Background technology
Because the body eutrophication problem is on the rise, various countries require to improve constantly to the water outlet nitrogen and phosphorus content, how to develop novel bio-denitrifying sewage dephosphorization apparatus and how existing apparatus are improved the focus that becomes various countries' research.The Orbal(opel) the oxidation ditch device is widely used a kind of denitrification dephosphorization apparatus, and this device generally is comprised of three concentration ellipsis shape raceway grooves, adopts three layers of irrigation canals and ditches, and wherein outer fissure accounts for 60% of cubic capacity, and middle ditch accounts for 30%, and septal fossula only accounts for about 10%.Waste water at first enters outer fissure, then enters middle ditch and septal fossula through the partition wall aperture successively, and mixed solution is discharged by central island at last.When tradition Orbal oxidation ditch device moves by the denitrogenation dephosphorizing mode, outward,, the septal fossula dissolved oxygen concentration is controlled at respectively 0 mg/L, 1 mg/L and 2mg/L, remain on 0mg/L on the outer fissure dissolved oxygen macroscopic view, be actually by the control aeration rate, in adjacent two turnplate aerator zones, there are simultaneously aerobic, anoxic and anaerobism operating mode, therefore outer fissure is actually the series operation of a plurality of A/A/O device, and the alternate run of this aerobic, anoxic and anaerobism operating mode is conducive to the denitrogenation dephosphorizing of sewage.But also there are many lower weak points of system's denitrogenation dephosphorizing efficient that causes in this device: (1) is because ammonification, digestion, denitrification process and biology are released the phosphorus process all carries out at outer fissure, denitrifying bacterium and dephosphorization bacterial have been aggravated to the contention of carbon source, it is more not enough to cause dephosphorization bacterial to release the required carbon source of phosphorus process, thereby makes the whole system dephosphorization efficiency by using low; (2) dephosphorization bacterial is effectively finished release the phosphorus process, outer fissure needs absolute anaerobic environment, therefore in ditch oxygen-supplying amount with move the nitrification efficiency of comparing 15%, the TKN that descended by the denitrogenation mode and descended 20%.Obviously dephosphorization realizes to sacrifice denitrogenation, thereby makes the nitric efficiency of this device maintain lower level; (3) in order to keep the quantity of nitrobacteria in the system, sludge age is longer, is unfavorable for the breeding of dephosphorization bacterial, and phosphor-removing effect is relatively poor; (4) this device hydraulic detention time is longer in addition, Chi Rongda, and construction costs is higher.
Summary of the invention
The utility model in the weak point that exists aspect the sewage denitrification and dephosphorization, provides that a kind of floor space is little for existing Orbal oxidation ditch device, denitrogenation and the good opel oxidation ditch sewage denitrification and phosphorus removal as well device of phosphor-removing effect.
Opel oxidation ditch sewage denitrification and phosphorus removal as well device of the present utility model, by the following technical solutions:
This denitrification dephosphorization apparatus comprises three concentration ellipsis shape raceway grooves, is followed successively by from outside to inside outer raceway groove, middle raceway groove and interior raceway groove, separates by partition wall between each raceway groove, is provided with the aperture that inside and outside raceway groove is communicated with in the partition wall; At least one turnplate aerator is set in the outer raceway groove, it is a zone between the adjacent discs aerator, all be connected with inlet channel in first area and last zone, each zone is divided into again carrier district and anaerobic zone, and carrier is distributed with polystyrene support in the district.
Polystyrene support is dendroid.
The utility model changes water intake mode into multipoint water feeding, solved the problem of carbon source deficiency, adopt the soft polystyrene that can swing with the water body flow state as carrier, help to improve the treatment effect of oxidation ditch, be convenient to clean, have the advantage of activated sludge process and biomembrance process concurrently, be conducive to the purification of sewage, improved nitrification effect, denitrogenation and phosphor-removing effect are good, are reaching in the situation of certain pollutants removal rate, and hydraulic detention time obviously shortens, floor space is less, has reduced construction costs.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Wherein: 1, outer raceway groove, 2, middle raceway groove, 3, interior raceway groove, 4, partition wall, 5, turnplate aerator, 6, the carrier district, 7, anaerobic zone, 8, polystyrene support, 9, inlet channel.
Embodiment
As shown in Figure 1, denitrification dephosphorization apparatus of the present utility model and existing Orbal(opel) the oxidation ditch device is the same, also comprise three concentration ellipsis shape raceway grooves, be followed successively by from outside to inside outer raceway groove 1, middle raceway groove 2 and interior raceway groove 3, separate by partition wall 4 between each raceway groove, be provided with the aperture in the partition wall so that inside and outside raceway groove is communicated with.
Denitrification dephosphorization apparatus of the present utility model is to arrange among at least one turnplate aerator 5(Fig. 1 to be provided with four in whole outer raceway groove 1), a plurality of turnplate aerators are divided into a plurality of zones (Fig. 1 China and foreign countries raceway groove 1 is divided into four zones) with outer raceway groove 1, all are connected with inlet channel 9 in first area and last zone.Each zone that is divided in the outer raceway groove 1 is divided into again carrier district 6 and anaerobic zone 7, and carrier district 6 is the downstream area of turnplate aerator 5.Carrier district 6 interior placement polystyrene supports 8, this is because the nitration denitrification process mainly occurs in the certain area in turnplate aerator 5 downstreams.Polystyrene support 8 is dendroid, and soft very thin, proportion is slightly less than water.Polystyrene support 8 evenly distributes, and root is fixed in the bottom in the outer raceway groove 1, with current shifting, is stretched over each corner in the outer raceway groove 1 as pasture and water, fully contacts with sewage, in order to avoid form the dead angle.The about 10cm of the base diameter of polystyrene support 8, long 1～2m has a plurality of branches,, is tapered the about 2mm of tail diameter from the carrier root to end direction.Polystyrene support 8 surface irregularity, are easy to suspended substance and adhere in sewage at the buoyancy low suspension, and its surface growth of microorganic adhesion forms microbial film, and in raceway groove the very high activity of maintenance under the washing away of high flow velocities.
Compare with the conventional art that adds suspension material, have larger advantage with polystyrene material as carrier, at first this carrier swings with the flow state of water body, can be owing to the souring of current is piled up; Secondly, have larger surface-area, for microorganism provides total enough growing spaces, help to improve the treatment effect of oxidation ditch; In addition, the microbial film that microorganism forms is attached to the surface of filler, is convenient to clean.
Most of sewage is at first entered in the outer raceway groove 1 by an inlet channel 9, and nitration denitrification and BOD are carried out in each zone of flowing through successively in each regional carrier district
5Removal, in anaerobic zone, carry out anaerobic phosphorus release and BOD
5Removal.Because denitrification and anaerobic phosphorus release process lack carbon source in last zone, so introduce former water so that enough carbon sources to be provided by all the other inlet channels.Mixed solution enters middle raceway groove 2 by outer raceway groove 1 by the partition wall aperture at last and is further processed.Because forming, each reaction zone carrier adapts to the coenosis that flows into this district's sewage character in the differential responses zone, therefore outer raceway groove 1 is actually the series operation of a plurality of A/A/O device, and the alternate run of this aerobic, anoxic and anaerobism operating mode has improved sewage denitrification and dephosphorization efficient greatly.
Denitrification dephosphorization apparatus of the present utility model has remedied the deficiency of traditional Orbal oxidation ditch device, has the advantage of activated sludge process and biomembrance process concurrently:
(1) microorganism basis for the survival environment changes the gas, liquid, solid three-phase into by gas, liquid two-phase, has formed the more complicated combined type ecosystem, is conducive to the purification of sewage;
(2) the long mud microbial film in age that is attached to carrier surface provides very favorable living environment for poky nitrobacteria, improved nitrification effect, realized that simultaneously hydraulic detention time separates with the part of solid mean residence time, can under shorter mud condition in age, obtain preferably denitrification effect, can obtain simultaneously preferably denitrogenation and phosphor-removing effect;
(3) because this carrier has larger specific surface area, a large amount of microorganic adhesion surface growths, sludge concentration can reach 10 times of 5 – of traditional Orbal oxidation ditch in the pond, therefore reaching in the situation of certain pollutants removal rate, obviously shortened hydraulic detention time, floor space is less, has reduced construction costs.
Above-mentioned denitrification dephosphorization apparatus has carried out 3.6m
3The sewage disposal test in/sky.Test was carried out 3 months, and wherein the carrier inoculation is 1 month.Test influent quality: COD
Cr260mg/L, BOD
5150mg/L, SS 150mg/L, TP6mg/L, TN 28mg/L; Hydraulic detention time 12 hours, sludge age 10 days is not established preliminary sedimentation tank.Test effluent quality: COD
Cr28 mg/L, BOD
511 mg/L, SS 18mg/L, TP 1.4mg/L, TN 3.2 mg/L.COD
CrClearance be 89.2%, BOD
5Clearance be that the clearance of 92.7%, SS is that the clearance of 88%, TP is that the clearance of 76.7%, TN is 88.6%.
Claims (2)
1. an opel oxidation ditch sewage denitrification and phosphorus removal as well device comprises three concentration ellipsis shape raceway grooves, is followed successively by from outside to inside outer raceway groove, middle raceway groove and interior raceway groove, separates by partition wall between each raceway groove, is provided with the aperture that inside and outside raceway groove is communicated with in the partition wall; It is characterized in that: at least one turnplate aerator is set in the outer raceway groove, it is a zone between the adjacent discs aerator, all be connected with inlet channel in first area and last zone, each zone is divided into again carrier district and anaerobic zone, and carrier is distributed with polystyrene support in the district.
2. opel oxidation ditch sewage denitrification and phosphorus removal as well device according to claim 1, it is characterized in that: described polystyrene support is dendroid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220326084 CN202785804U (en) | 2012-07-06 | 2012-07-06 | Orbal oxidation ditch device for removing nitrogen and phosphorus from sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220326084 CN202785804U (en) | 2012-07-06 | 2012-07-06 | Orbal oxidation ditch device for removing nitrogen and phosphorus from sewage |
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| Publication Number | Publication Date |
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| CN202785804U true CN202785804U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220326084 Expired - Fee Related CN202785804U (en) | 2012-07-06 | 2012-07-06 | Orbal oxidation ditch device for removing nitrogen and phosphorus from sewage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110436628A (en) * | 2019-08-15 | 2019-11-12 | 浙江海牛环境科技股份有限公司 | A kind of improved oxidation ditch biochemical wastewater treatment system |
-
2012
- 2012-07-06 CN CN 201220326084 patent/CN202785804U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110436628A (en) * | 2019-08-15 | 2019-11-12 | 浙江海牛环境科技股份有限公司 | A kind of improved oxidation ditch biochemical wastewater treatment system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20130706 |