CN201952322U - Anaerobic micropore aeration oxidation ditch reactor - Google Patents
Anaerobic micropore aeration oxidation ditch reactor Download PDFInfo
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- CN201952322U CN201952322U CN 201020585496 CN201020585496U CN201952322U CN 201952322 U CN201952322 U CN 201952322U CN 201020585496 CN201020585496 CN 201020585496 CN 201020585496 U CN201020585496 U CN 201020585496U CN 201952322 U CN201952322 U CN 201952322U
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Abstract
The utility model relates to an anaerobic micropore aeration oxidation ditch reactor, which comprises a plurality of treatment zones which are adjacent with each other and are hydraulically communicated with each other. The treatment zones comprise a hydrolysis zone, an anaerobic zone, an anoxic zone, an aerobic zone and a settling zone. A supernate backflow channel is arranged between the settling zone and the hydrolysis zone, so that nitrate-contained supernate discharged from the settling zone flows back into the hydrolysis zone, and denitrifying treatment is carried out by utilizing the action of denitrifying bacteria to carry out a denitrification project. A hydrolysis system, an anaerobic system, an anoxic system, an aerobic system and a settling system are integrated by the reactor, so that the occupied area is greatly saved and the investment cost is reduced. By adopting an internal and external return-flow system, the tank volume use ratio is improved, the effects of denitrification and dephosphorization are enhanced and the treatment cost is reduced.
Description
Technical field
The utility model relates to a kind of facility and method that city domestic sewage is handled that be used for, and particularly a kind ofly is used to satisfy the anaerobism microporous aerated oxidation ditch reactor of advanced nitrogen dephosphorization requirement and uses the method that this reactor carries out sewage disposal.
Background technology
In order to protect water surrounding, reduce and pollute, China has strengthened the construction dynamics to the municipal sewage plant in recent years.The technology that is suitable for municipal sewage treatment at present has Activated Sludge Process, SBR method and mainstream technologys such as mutation technology, oxidation ditch process thereof.Yet municipal sewage treatment also is one of high energy consumption industry, and high energy consumption has caused sewage treatment facility operation cost height, is to cause one of major reason that sewage work can not normally move.Therefore, the problem of solution is needed in the energy-saving and cost-reducing normal operation that has become the guarantee municipal sewage plant of sewage disposal badly.
Oxidation ditch is since 50 years 20th century came out, because it is simple in structure, operation is easy and stable treated effect and be widely studied and use all over the world, and constantly has novel oxidation ditch to emerge in large numbers.In recent years, the application of oxidation ditch process aspect China's municipal sewage treatment is quite general.Adopted existing 154 families of Sewage Plant of oxidation ditch in 2006, near 1/3rd of existing municipal sewage plant.
Common oxidation ditch type comprises Carrousel (Carrouse) oxidation ditch, two ditch or three ditch alternative expression oxidation ditches, opel (Orbal) oxidation ditch and Paasche Wei Er (Pasveer) oxidation ditch etc. at present.These oxidation ditches mostly be exposed to ground and ringwise or the irrigation canals and ditches of bar loop constitute its main body reactive moieties, and possess oxidation and precipitation process ability.
These existing oxidation ditches utilize the surface aeration equipment oxygen supply usually and promote current and advance, and the characteristics of these equipment are that installation and maintenance are simple, and are easy to use.But the problem of its existence is exactly the service rating height of the equipment that is equipped with, the energy consumption height of folk prescription water treatment, and this oxygen supply mode energy consumption is generally at 15～25w/m
3The aeration effect of these equipment also can only involve the distance of 1-2 rice under water simultaneously, they mix oxygen supply by changeing equipment such as brush, plate-spinning with the mixed solution top section, and then drive underclad portion mixing oxygen supply, so the pond of these oxidation ditch process is little deeply usually.
In addition, the operation characteristic of oxidation ditch is underload, long sludge age, so treatment effect is stable, effluent quality is good, and can reach higher nitrogen removal rate.Yet from the principle of biological carbon and phosphorous removal, long sludge age helps the growth of nitrifier, can obtain high nitric efficiency; But biological phosphate-eliminating is the discharging by excess sludge removes phosphorus from system, therefore long sludge age is the major reason that causes biological phosphate-eliminating efficient not high.Although increased anaerobic reactor in some oxidation ditch process at present, the raising of dephosphorization efficiency by using need be shortened sludge age usually.Along with the shortening of sludge age, the original advantage of oxidation ditch is weakened.Therefore, improving the denitrogenation dephosphorizing effect on the basis that keeps the oxidation ditch characteristics is technological difficulties.
So these existing oxidation ditches itself have some shortcoming, the one, the energy that oxidation ditch is consumed when carrying out oxygen supply is higher with the ratio of organism volume load; The 2nd, floor space is bigger, mainly be limited by the efficiency of oxygen supply of surface aeration equipment low, need reasons such as bigger impellent and ditch depth are more shallow; The 3rd, the denitrogenation dephosphorizing poor effect is difficult to satisfy the requirement of municipal effluent industry advanced nitrogen dephosphorization.
Because oxidation Ditch Technology is shorter in the time of China's large-scale application, be to introduce and duplicate mostly, lacking systematic research and summary, and how to reduce the energy consumption of oxidation ditch and improve denitrogenation dephosphorizing efficient, is the key that guarantees oxidation ditch system steady running and continue development.
Summary of the invention
At above-mentioned the deficiencies in the prior art, the purpose of this utility model provides and a kind ofly can satisfy anaerobism microporous aerated oxidation ditch reactor and the sewage water treatment method that denitrogenation dephosphorizing that the municipal sewage treatment industry improves day by day requires, high to solve the ubiquitous denitrification dephosphorization technique investment of present oxidation ditch process, problems such as working cost height, reduce the energy consumption of sewage disposal in the oxidation ditch process, improve technology denitrogenation dephosphorizing efficient.
For achieving the above object, one of the technical solution of the utility model is: a kind of anaerobism microporous aerated oxidation ditch reactor, this reactor comprise and adjoining each other and a plurality of treatment zones of hydraulic communication each other that described a plurality of treatment zones comprise:
Hydrolysis area wherein is provided with the acidication bacterium and the denitrifying bacteria of be hydrolyzed respectively acidifying and adverse effect denitrogenation processing, and pending sewage is introduced this hydrolysis area from the outside, and with described acidication bacterium and denitrifying bacteria contact reacts;
Anaerobic zone wherein is provided with the anerobe that carries out anaerobic treatment, and the sewage after hydrolysis treatment is introduced this anaerobic zone from this hydrolysis area, and with described anerobe contact reacts;
The oxygen-starved area wherein is provided with and carries out the amphimicrobe that anoxic denitrification is handled, and the sewage after anaerobic treatment is introduced this oxygen-starved area from this anaerobic zone, and with described amphimicrobe contact reacts;
Aerobic zone wherein is provided with and removes the oxygen supply facility that organic carbon source, nitration treatment and aerobic suction phosphorus are handled, and the sewage after anaerobic treatment is introduced this aerobic zone from this oxygen-starved area, and give the sewage oxygen supply by described oxygen supply facility;
The settling region wherein is provided with mud-water separation facility and discharging facility, the muddy water mixed solution of handling well is introduced this settling region from this aerobic zone, and separate muddy water by described mud-water separation facility, and discharge respectively by the discharging facility; Wherein
Be provided with the supernatant liquor return flow line between this settling region and this hydrolysis area, the supernatant liquor that contains nitrate of discharging in this settling region is back in this hydrolysis area through this supernatant liquor return flow line.
According to an embodiment of the present utility model, wherein, also be provided with the mud return flow line between this settling region and this anaerobic zone, the part mud through carbonization and nitration treatment in this aerobic zone is back to this anaerobic zone through this mud return flow line from this settling region.
According to an embodiment of the present utility model, wherein, between this aerobic zone and this oxygen-starved area, also be provided with the mixed-liquor return passage, the muddy water mixed solution that the part in this aerobic zone contains nitrate is back in this oxygen-starved area through this mixed-liquor return passage.
The beneficial effects of the utility model are, this bio-reactor catchment separate, anaerobism, anoxic, aerobic and settling system be in one, saved floor space greatly, reduced the investment capital cost.The internal reflux system that is adopted has improved utilization rate of tank volume, has strengthened the effect of denitrogenation dephosphorizing, has reduced processing costs.The stability of operation and reliability increase, and effluent quality can reach national grade one discharge standard.Integrated, the blocking of structures, extensibility is stronger.
Particularly, the utlity model has following advantage:
1) anaerobism microporous aerated oxidation ditch reactor of the present utility model adopts the anaerobic-aerobic combinatorial principle, give full play to the pretreated advantage of the anaerobism that does not need energy consumption, and reduce the organic loading of oxidation ditch, thereby reach the target that reduces the entire treatment system energy consumption with this.
Anaerobism microporous aerated oxidation ditch reactor of the present utility model has been set up the supernatant liquor return flow line between settling region and hydrolysis area, the supernatant liquor that contains nitrate of discharging in the settling region is back in this hydrolysis area, and handles and realize removing more fully nitrogenous source by utilizing denitrifying bacteria to carry out denitrification.Make full use of the anaerobic hydrolysis effect of hydrolysis area, make it not only have effect, have the not available effect that removes nitrogenous source of existing independent hydrolytic tank technology simultaneously the carbon source organic matter degradation.
2) anaerobism microporous aerated oxidation ditch reactor of the present utility model has been integrated the microporous aeration device in the traditional activated sludge process in aerobic zone (being oxidation ditch), has improved the utilising efficiency of dissolved oxygen in the aerobic zone greatly.Utilize the underwater propeller that is arranged on this microporous aeration device downstream to replace the commentaries on classics brush and the plate-spinning device of conventional oxidation ditch simultaneously, under the prerequisite that does not reduce horizontal flow velocity, greatly reduce the power consumption of promotion, and help to improve the efficiency of oxygen supply of microporous aeration device.
3) because the aeration ununiformity of aerating apparatus almost is inevitable, so, even the wind supply quantity that has adopted meet the specifications to require, still can form the dead angle in body part, pond, circulation plug-flow form by means of underwater propeller of the present utility model then can form good waterpower fluidised form, effectively avoids the generation of analogue.Therefore, behind the increase transverse flow speed, help improving the utilization ratio that the pond holds.
Description of drawings
Fig. 1 represents the structural representation according to the anaerobism microporous aerated oxidation ditch reactor of the utility model embodiment
Wherein, description of reference numerals is as follows:
1～hydrolysis area, 2～anaerobic zone, 3～oxygen-starved area, 4～aerobic zone, 5～settling region, 6～mud storage pool, 7-10～communicating aperture, 11-13～effluent weir, 14～mixed-liquor return pump, 15～sludge reflux pump, 16～mud discharging pump, 17-19～underwater propeller, 20～microporous aeration device, 21～wet well, 22～supernatant liquor reflux pump, 23～water inlet pipe, 24～sludge bucket, 25～rising pipe, 26～distributing flue, R1～supernatant liquor return flow line, R2～mud return flow line, R3～mixed-liquor return passage, W1-W4～reactor outer wall.
Embodiment
Below in conjunction with accompanying drawing and example the utility model is described further.
Fig. 1 represents the structural representation according to the anaerobism microporous aerated oxidation ditch reactor of the utility model embodiment.
As shown in Figure 1, the anaerobism microporous aerated oxidation ditch reactor of this enforcement comprises and adjoining each other and a plurality of treatment zones of hydraulic communication each other.Described a plurality of treatment zone comprises hydrolysis area 1, anaerobic zone 2, oxygen-starved area 3, aerobic zone 4, settling region 5 and mud storage pool 6.With above-mentioned a plurality of treatment zone reasonable disposition, make it constitute one and be similar to reactor overall area rectangular, that surround by reactor outer wall W1-W4.In the present embodiment, reactor outer wall W1 near anaerobic zone 2 and oxygen-starved area 3 is a upper outer wall, near the reactor outer wall W3 of settling region 5 are below outer walls, are right-hand outer walls near the reactor outer wall W4 of hydrolysis area 1, are the left outer walls away from the reactor outer wall W3 of hydrolysis area 1.
Oxygen-starved area 3 is used for the sewage after anaerobic treatment is introduced this oxygen-starved area 3 from this anaerobic zone 2, and carries out anoxic denitrification processing, denitrogenation from sewage by the amphimicrobe that stops wherein.
The muddy water mixed solution that settling region 5 is used for handling well is introduced this settling region 5 from this aerobic zone 4, carries out mud-water separation, carries out the discharging of mud discharging and processing back clear water then.
Between this settling region 5 and this hydrolysis area 1, be provided with supernatant liquor return flow line R1, make the supernatant liquor that contains nitrate of discharging in this settling region 5 be back in this hydrolysis area 1, and utilize denitrifying bacteria to carry out denitrification and handle and remove nitrogenous source.
Between this settling region 5 and this anaerobic zone 2, also be provided with mud return flow line R2, make that the part mud through carbonization and nitration treatment is back to this anaerobic zone 2 from this settling region 5 in this aerobic zone 4, keep enough microbial biomasss to continue to participate in anaerobic treatment.
Between this aerobic zone 4 and this oxygen-starved area 3, also be provided with mixed-liquor return passage R3, make muddy water mixed solution that part in this aerobic zone 4 contains nitrate be back to continue to participate in anoxic denitrification in this oxygen-starved area 3 and handle.
Wherein, this aerobic zone 4 forms dual U-shaped circulation irrigation canals and ditches by four long strip shape raceway grooves side by side, is provided for the microporous aeration device 20 to the microorganism oxygen supply at the middle part of every long strip shape raceway groove.Be provided with in order to promote the underwater propeller 19 that muddy water mixed solution circulates the downstream next-door neighbour who is arranged at every microporous aeration device 20 in the long strip shape raceway groove.
In this aerobic zone 4, also comprise: mixed-liquor return pump 14, in this mixed-liquor return passage R3, the part muddy water mixed solution in this aerobic zone 4 is back in this oxygen-starved area 3, this mixed-liquor return pump 14 is arranged near these 3 places, oxygen-starved area; Communicating aperture 10 is used for being communicated with this settling region 5, and this communicating aperture 10 is arranged on the partition wall between this aerobic zone 4 and this settling region 5, and as shown in Figure 1, this communicating aperture 10 specifically is arranged on this partition wall near its low order end position, promptly near distributing flue 26 places; And effluent weir 12, being used for the muddy water mixed solution after the collection and treatment, this effluent weir 12 is arranged near these communicating aperture 10 places, and collected supernatant liquor is flowed into next treatment zone by this communicating aperture 10.
Wherein, this hydrolysis area 1 rectangular shaped comprises in this hydrolysis area 1: water inlet pipe 23, be used for treatment sewage is introduced this hydrolysis area 1, and this water inlet pipe 23 is communicated with outside sewage running piping; Communicating aperture 7 is used for being communicated with this anaerobic zone 2, and this communicating aperture 7 is arranged in this hydrolysis area 1 and on the partition wall between this anaerobic zone 2, as shown in Figure 1, this communicating aperture 7 specifically is arranged on close its uppermost position place, i.e. the outer wall W1 place of close reactor on this partition wall; And effluent weir 11, being used to collect supernatant liquor, this effluent weir 11 is arranged near these communicating aperture 7 places, and collected supernatant liquor is flowed into next treatment zone by this communicating aperture 7.
Wherein, this anaerobic zone 2 forms the circulation irrigation canals and ditches by two long strip shape raceway grooves side by side, is provided with at the middle part of every long strip shape raceway groove in order to promote the underwater propeller 17 that muddy water mixed solution circulates.
Comprise communicating aperture 8 in this anaerobic zone 2, be used for being communicated with this oxygen-starved area 3 that this communicating aperture 8 is arranged on the partition wall between this anaerobic zone 2 and this oxygen-starved area 3, as shown in Figure 1, this communicating aperture 8 specifically is arranged on this partition wall near its medium position place.
Wherein, this oxygen-starved area 3 forms the circulation irrigation canals and ditches by two long strip shape raceway grooves side by side, is provided with at the middle part of every long strip shape raceway groove in order to promote the underwater propeller 18 that muddy water mixed solution circulates.
In this oxygen-starved area 3, also comprise communicating aperture 9, be used for being communicated with this aerobic zone 4, this communicating aperture 9 is arranged on the partition wall between this oxygen-starved area 3 and this aerobic zone 4, as shown in Figure 1, this communicating aperture 9 specifically is arranged on close its high order end position, i.e. the outer wall W2 place of close reactor on this partition wall.
Wherein, this settling region 5 is formed by rectangular channel, comprises in this settling region 5: distributing flue 26, and be used for and will introduce this settling region 5 evenly distributedly from these aerobic zone 4 effusive muddy water mixed solutions of handling well, this distributing flue 26 is arranged on the upstream extremity of this settling region 5; Sludge bucket 24 is used for this settling region 5 sedimentary mud are collected, and this sludge bucket 24 is arranged near this distributing flue 26; Effluent weir 13 is used to collect supernatant liquor and discharge, and this effluent weir 13 is arranged on the downstream end of this settling region 5.
In addition, mud storage pool 6 is used for the mud of this settling region 5 post precipitations being introduced this mud storage pool 6 and storing wherein, and this mud storage pool 6 is arranged between this settling region 5 and this hydrolysis area 1.
Comprise in this mud storage pool 6: sludge reflux pump 15 is back to active sludge this anaerobic zone 2 from this settling region 5 in the R2 of mud return flow line; And mud discharging pump 16, be used for the excess sludge that contains phosphoric is discharged from this mud storage pool 6.
In the present embodiment, described anaerobism microporous aerated oxidation ditch reactor also comprises wet well 21, is used for the supernatant liquor that the effluent weir 13 of this settling region 5 is discharged is introduced wherein, and this wet well 21 is arranged between this settling region 5 and this aerobic zone 4.
In this wet well 21, comprise: supernatant liquor reflux pump 22, the part supernatant liquor of in the R1 of supernatant liquor return flow line this effluent weir 13 being discharged is back in this hydrolysis area 1; And rising pipe 25, being used for the supernatant liquor that this effluent weir 13 is discharged is discharged outside this reactor, this rising pipe 25 is communicated with clear water transport pipe after the external treatment.
Specifically describe the method for using anaerobism microporous aerated oxidation ditch reactor of the present utility model to carry out sewage disposal below.
This method may further comprise the steps:
At first, pending sewage enters settling pit after grid pump well pump house, lifting, and gravity flow enters anaerobism microporous aerated oxidation ditch reactor of the present utility model, handles back up to standard discharging at last.
Pending sewage at first enters the hydrolysis area 1 of front end via water inlet pipe 23, the active sludge that contains the acidication bacterium in this hydrolysis area 1 stop, it all has certain removal effect to organic carbon source, ss suspended solid, simultaneously the organism of difficult degradation can be converted into the readily biodegradable organic matter, improve the efficient of follow-up aerobic treatment.This hydrolysis area 1 also has the peculiar function of the utility model, the supernatant liquor that contains nitrate of autoprecipitation district 5 ends is back to this district and finishes the supernatant liquor backflow in the future exactly, handle by utilizing denitrifying bacteria to carry out denitrification, can further improve denitrification effect sewage.
Sewage is handled in hydrolysis area 1 after entered in the anaerobic zone 2 active sludge that contains anerobe that stops in this anaerobic zone 2 by effluent weir 11 and communicating aperture 7.Circulation irrigation canals and ditches both sides at this anaerobic zone 2 respectively are equipped with underwater propeller 17, are responsible for promoting muddy water mixed solution and run up in annular irrigation canals and ditches, and bacterium and organism are able to thorough mixing.Handle by the dephosphorization that utilizes anerobe to carry out sewage, the phosphorus in the sewage is released.
Then sewage enters in the oxygen-starved area 3 via communicating aperture 8, and stopping in this oxygen-starved area 3 has the active sludge that contains amphimicrobe.Circulation irrigation canals and ditches both sides in this oxygen-starved area 3 are equipped with underwater propeller 18 equally, are responsible for promoting muddy water mixed solution and run up in annular irrigation canals and ditches, and bacterium and organism are able to thorough mixing.Carry out the denitrogenation processing of sewage by the denitrification that utilizes amphimicrobe.Nitrogenous source in the sewage is removed.
In this oxygen-starved area 3, by will be wherein, utilize in the mixed solution that refluxes contained nitrate further to carry out denitrification and handle, thereby realize further denitrogenation from the mixed-liquor return of aerobic zone 4.
Sewage has entered in the aerobic zone 4 via communicating aperture 9 then, this district forms dual U-shaped circulation irrigation canals and ditches by four rectangular raceway grooves, muddy water mixed solution flows in irrigation canals and ditches with the speed that is not less than 0.3m/s under the promotion of thruster 19 under water, simultaneously be provided with microporous aeration device 20, be responsible for giving the aerobic microbiological oxygen supply that stops wherein every a segment distance; This aerobic zone 4 is carrying out organic carbon source simultaneously and is removing and nitrated effect under action of microorganisms.
Be provided with mixed-liquor return pump 14 at aerobic zone 4 near 3 places, oxygen-starved area, be used to carry out above-mentioned mixed-liquor return.
Sewage is degraded in aerobic zone 4 to the emission standard of national requirements, the muddy water mixed solution of handling well finally enters the distributing flue 26 of settling region 5 via effluent weir 12 and communicating aperture 10, enter the mud-water separation of carrying out of settling region 5 then, the mud of post precipitation is scraped the mud of pond bottom sediments in the sludge bucket 24 with the mud scraper that is arranged on settling tank 5 end faces, and then enters in the mud storage pool 6.
Supernatant liquor after the mud-water separation is then collected and is expelled in the wet well 21 by the effluent weir 13 that is arranged on settling region 5 ends, the part supernatant liquor is back to and finishes supernatant liquor in this hydrolysis area 1 and reflux by being arranged on supernatant liquor reflux pump 22 in this wet well 21, and remaining supernatant liquor is discharged by rising pipe 25 as water outlet up to standard.
In this mud storage pool 6, the part active sludge is back to and finishes mud in the anaerobic zone 2 and reflux by being arranged on sludge reflux pump 15 in this mud storage pool 6, and Sheng Xia mud is disposed to outside this reactor via sludge pump 16 simultaneously.
The utility model improves from following three aspects:
1) utilize the anaerobic-aerobic combinatorial principle, give full play to the pretreated advantage of anaerobic hydrolysis of no energy consumption, reduce the organic loading of oxidation ditch simultaneously, enhanced system denitrification denitrogenation effect, and then reach the target of the energy consumption of reduction system.
The mechanism of action of hydrolysis area 1 mainly comprises the following aspects:
A. the acidication bacterium is small organic molecules such as formic acid, acetate with the organic matter degradation in the waste water, is easily utilized by denitrifying bacteria, has improved denitrifying speed and utilization of carbon source efficient.
B. acidication process and denitrification process carry out in same hydrolysis area, thereby obtain the promoted each other effect of associated treatment.Acidication provides efficient carbon source for denitrification, and denitrification can quicken the generation that acidication reacts again to the consumption of acidication product, reduce product and suppress, thereby the utilization of the acidization of making, carbon source is all more abundant.
C. denitrifying bacteria can remain on lower level with its concentration to the utilization timely and effectively of acidizing product, has reduced absorption, absorption and the biological metabolism utilization of other microorganisms to acidizing product.
D. nitrification liquid refluxes and to have changed the redox potential of hydrolysis area, may suppress to a certain extent methanobacteria (best ORP-200～-400mv) growth.
E. the fluidised form of pulling flow type, upflowing is very effective for microorganism growth.
Compare with traditional denitrification dephosphorization technique, same under the situation that does not increase external carbon source, the denitrification effect of anaerobism microporous aerated oxidation ditch reactor of the present utility model will improve nearly 20～40%, this is for the more and more stricter nitrogen phosphorus controlling index in present municipal sewage plant, and this anaerobism microporous aerated oxidation ditch is an optimal selection beyond doubt.
2) aerobic zone 4 (oxidation ditch) has been integrated the microporous aeration device in the traditional activated sludge process, has improved the utilising efficiency of dissolved oxygen in the aerobic zone greatly.Utilize thruster to replace the commentaries on classics brush and the plate-spinning device of conventional oxidation ditch, form good waterpower fluidised form, under the prerequisite that does not reduce horizontal flow velocity, greatly reduce the power consumption of promotion.
Adopt microporous aeration device and underwater propeller in the utility model.Microporous aeration device at first is set in each oxidation ditch at certain intervals, utilizes the micro-pore aeration mode to increase oxidation ditch process sewage and air contact area, improved the oxygen transfer efficiency height.Secondly, the next-door neighbour is provided with underwater propeller in the downstream of microporous aeration device, utilizes lower energy consumption, satisfies oxidation ditch process and moves necessary horizontal flow velocity.In addition, underwater propeller has also increased the transmission of dissolved oxygen, thereby helps to improve the efficiency of oxygen supply of microporous aeration device.Underwater propeller to the raising of efficiency of oxygen supply mainly by two approach: make the water body fluidised form more be tending towards disorderly on the one hand, help the renewal at speed up gas and liquid interface and quicken the transfer of oxygen; By weakening the influence of annular-flow, make in fact up-flow speed reduction of bubble on the other hand, correspondingly prolonged the duration of contact between the gas-liquid.
In addition, the ratio in the zone of the zone of the aerating apparatus that is provided with in the anaerobism microporous aerated oxidation ditch and non-aeration device is between 1/4～1/3, this compares with traditional activated sludge process technology 100% area arrangements aeration dispersion device, has saved the assembly cost of aerating apparatus greatly and has reduced operation energy consumption.
In view of above factor, it is good that anaerobism microporous aerated oxidation ditch technology has a treatment effect, characteristic of low energy consumption.
3) pond of improving system holds utilising efficiency
The utilization ratio of oxidation ditch system utilization rate of tank volume and dissolved oxygen and the utilization ratio of active sludge all have relation.Under the situation of microbial bacteria in the active sludge and dissolved oxygen and organic substrates full contact, the processing efficiency of system is only best.
Generally speaking, the ununiformity of oxygen supply aeration almost is inevitably in the aerobic aeration pond, so, even the wind supply quantity that has adopted meet the specifications to require still can form dead angle, dead band in body part, pond.This circulation irrigation canals and ditches plug-flow form of oxidation ditch then can effectively be avoided the generation of analogue then.Therefore, utilize the mode of micro-pore aeration, after the increase underwater propeller improves transverse flow speed, help improving the utilization ratio that the pond holds.
Test result below by actual sewage treatment plant further specifies advantage of the present utility model and effect.
Test condition and method:
With certain city 1.5 ten thousand m
3The sewage disposal factory engineering of/d is an example, design influent quality COD 450mg/L, BOD 220mg/L, TN 50mg/L, NH
4-N 40mg/L, water outlet reaches one-level B emission standard.The main process that this project adopts is an anaerobism microporous aerated oxidation ditch technology, and the reactor useful volume is 12490m
3, 19.40 hours residence time, comprise hydrolysis, anaerobism, anoxic, aerobic and precipitate five treatment stage.Its processing technological flow is as follows:
Its flow process is: sewage is at first removed thick foreign material through coarse rack, enter pump well through sewage after the initial gross separation, rotary drum separating machine on the horizontal-flow grit chamber of flowing through after the pump lifting is further removed the smaller particles thing, and rotary drum separating machine trapped substance is transported to the refuse tip outward together with the grid slag that grid is retained down.Sewage enters horizontal-flow grit chamber and carries out the sand water sepn behind the rotary drum separating machine, isolate the sandstone of sandstone liquid in sand water separation device removal sewage, the sand of holding back outward transport.The settling pit water outlet enters anaerobism microporous aerated oxidation ditch reactor of the present utility model, and every index is qualified discharge after microbial biochemical reaction is handled.
The excess sludge of discharging from anaerobism microporous aerated oxidation ditch reactor is admitted to the collection mud sump, after the water extracter dehydration, and the mud cake outward transport.
Behind actual motion, as shown in table 1 to the sewage detection result before and after handling.Table 2 is processing parameter in the reactor during the sewage disposal.
Processing parameter in the table 2 run duration reactor
| Sequence number | Title | Numerical value | Remarks |
| 1 | |
13～29 |
|
| 2 | Effluent recycling compares % | 100～200 | The |
| 3 | Sludge loading [kgBOD/ (kgMLVSS.d)] | 0.12 | |
| 4 | Sludge concentration MLSS mg/L | 2540 | |
| 5 | Denitrification is removed load [kgNO 3-N/N/m 3.d] | 0.1 | |
| 6 | Hydrolysis area residence time h | 2.5 | |
| 7 | Anaerobic zone |
1 | |
| 8 | Oxygen-starved area residence time h | 1.5 | |
| 9 | Settling region |
3 |
Can get according to actual project data, the effluent quality of anaerobism microporous aerated oxidation ditch technology can satisfy national urban wastewater treatment firm one-level B emission standard.The COD value of water outlet is below 50mg/L, and the ammonia nitrogen basic controlling is below 5mg/L, and total nitrogen concentration substantially all maintains below the 15mg/L, and indivedual indexs can satisfy country-level A standard.
The investment of this project is 1200 yuan/ton, and ton water power consumption is 0.21kw.h/m
3, 0.35 yuan/m of direct operating cost
3, the about 0.55 yuan/m of unit operation cost
3
Claims (15)
1. anaerobism microporous aerated oxidation ditch reactor, this reactor comprise and adjoining each other and a plurality of treatment zones of hydraulic communication each other that described a plurality of treatment zones comprise:
Hydrolysis area (1) wherein is provided with the acidication bacterium and the denitrifying bacteria of be hydrolyzed respectively acidifying and adverse effect denitrogenation processing, and pending sewage is introduced this hydrolysis area (1) from the outside, and with described acidication bacterium and denitrifying bacteria contact reacts;
Anaerobic zone (2) wherein is provided with the anerobe that carries out anaerobic treatment, and the sewage after hydrolysis treatment is introduced this anaerobic zone (2) from this hydrolysis area (1), and with described anerobe contact reacts;
Oxygen-starved area (3) wherein is provided with and carries out the amphimicrobe that anoxic denitrification is handled, and the sewage after anaerobic treatment is introduced this oxygen-starved area (3) from this anaerobic zone (2), and with described amphimicrobe contact reacts;
Aerobic zone (4) wherein is provided with and removes the oxygen supply facility that organic carbon source, nitration treatment and aerobic suction phosphorus are handled, and the sewage after anaerobic treatment is introduced this aerobic zone (4) from this oxygen-starved area (3), and give the sewage oxygen supply by described oxygen supply facility;
Settling region (5) wherein is provided with mud-water separation facility and discharging facility, the muddy water mixed solution of handling well is introduced this settling region (5) from this aerobic zone (4), and separate muddy water by described mud-water separation facility, and discharge respectively by the discharging facility; Wherein
Be provided with supernatant liquor return flow line (R1) between this settling region (5) and this hydrolysis area (1), the supernatant liquor that contains nitrate of discharging in this settling region (5) is back in this hydrolysis area (1) through this supernatant liquor return flow line (R1).
2. anaerobism microporous aerated oxidation ditch reactor according to claim 1, wherein, also be provided with mud return flow line (R2) between this settling region (5) and this anaerobic zone (2), the part mud through carbonization and nitration treatment in this aerobic zone (4) is back to this anaerobic zone (2) through this mud return flow line (R2) from this settling region (5).
3. anaerobism microporous aerated oxidation ditch reactor according to claim 1, wherein, also be provided with mixed-liquor return passage (R3) between this aerobic zone (4) and this oxygen-starved area (3), the muddy water mixed solution that the part in this aerobic zone (4) contains nitrate is back in this oxygen-starved area (3) through this mixed-liquor return passage (R3).
4. according to claim 1 or 2 or 3 described anaerobism microporous aerated oxidation ditch reactors, wherein, this aerobic zone (4) forms dual U-shaped circulation irrigation canals and ditches by four long strip shape raceway grooves side by side, described oxygen supply facility is provided with a microporous aeration device (20) respectively for the microporous aeration device (20) to the microorganism oxygen supply at the middle part of every long strip shape raceway groove.
5. anaerobism microporous aerated oxidation ditch reactor according to claim 4 wherein, is provided with in order to promote the underwater propeller (19) that muddy water mixed solution circulates the downstream next-door neighbour who is arranged at every microporous aeration device (20) in the long strip shape raceway groove.
6. anaerobism microporous aerated oxidation ditch reactor according to claim 4 wherein, comprises in this aerobic zone (4):
Part muddy water mixed solution in this aerobic zone (4) is back to the mixed-liquor return pump (14) in this oxygen-starved area (3) in this mixed-liquor return passage (R3), this mixed-liquor return pump (14) is arranged near locating this oxygen-starved area (3);
The communicating aperture (10) that is communicated with this settling region (5), this communicating aperture (10) are arranged on the partition wall between this aerobic zone (4) and this settling region (5); And
The effluent weir of the muddy water mixed solution after the collection and treatment (12), this effluent weir (12) are arranged near this communicating aperture (10) and locate, and collected muddy water mixed solution flows into next treatment zone by this communicating aperture (10).
7. according to claim 1 or 2 or 3 described anaerobism microporous aerated oxidation ditch reactors, wherein, this hydrolysis area (1) rectangular shaped comprises in this hydrolysis area (1):
Treatment sewage is introduced water inlet pipe (23) in this hydrolysis area (1), and this water inlet pipe (23) is communicated with outside sewage running piping;
The communicating aperture (7) that is communicated with this anaerobic zone (2), this communicating aperture (7) are arranged on the partition wall between this hydrolysis area (1) and this anaerobic zone (2); And
Collect the effluent weir (11) of supernatant liquor, this effluent weir (11) is arranged near this communicating aperture (7) and locates, and collected supernatant liquor is flowed into next treatment zone by this communicating aperture (7).
8. according to claim 1 or 2 or 3 described anaerobism microporous aerated oxidation ditch reactors, wherein, this anaerobic zone (2) forms the circulation irrigation canals and ditches by two long strip shape raceway grooves side by side, is provided with at the middle part of every long strip shape raceway groove in order to promote the underwater propeller (17) that muddy water mixed solution circulates.
9. anaerobism microporous aerated oxidation ditch reactor according to claim 8 wherein, comprises the communicating aperture (8) that is communicated with this oxygen-starved area (3) in this anaerobic zone (2), this communicating aperture (8) is arranged on the partition wall between this anaerobic zone (2) and oxygen-starved area (3).
10. according to claim 1 or 2 or 3 described anaerobism microporous aerated oxidation ditch reactors, wherein, this oxygen-starved area (3) forms the circulation irrigation canals and ditches by two long strip shape raceway grooves side by side, is provided with at the middle part of every long strip shape raceway groove in order to promote the underwater propeller (18) that muddy water mixed solution circulates.
11. anaerobism microporous aerated oxidation ditch reactor according to claim 10, wherein, comprise the communicating aperture (9) that is communicated with this aerobic zone (4) in this oxygen-starved area (3), this communicating aperture (9) is arranged in this oxygen-starved area (3) and on the partition wall between this aerobic zone (4).
12. according to claim 1 or 2 or 3 described anaerobism microporous aerated oxidation ditch reactors, wherein, this settling region (5) are formed by rectangular channel, comprise in this settling region (5):
To introduce the distributing flue (26) of this settling region (5) from the effusive muddy water mixed solution of handling well of this aerobic zone (4) evenly distributedly, this distributing flue (26) is arranged on the upstream extremity of this settling region (5);
Described mud-water separation facility comprises:
With the collected sludge bucket of sedimentary mud (24) in this settling region (5), this sludge bucket (24) is arranged near this distributing flue (26);
The effluent weir (13) of the supernatant liquor after the collection mud-water separation, this effluent weir (13) is arranged on the downstream end of this settling region (5).
13. according to claim 1 or 2 or 3 described anaerobism microporous aerated oxidation ditch reactors, this reactor also comprises:
The mud of post precipitation in this settling region (5) is introduced this mud storage pool (6) and storage mud storage pool (6) wherein, and this mud storage pool (6) is arranged between this settling region (5) and this hydrolysis area (1).
14. anaerobism microporous aerated oxidation ditch reactor according to claim 13 wherein comprises in this mud storage pool (6):
In mud return flow line (R2), active sludge is back to sludge reflux pump (15) this anaerobic zone (2) from this settling region (5); And
The mud discharging pump (16) that described discharging facility is discharged from this mud storage pool (6) for the excess sludge that will contain phosphoric.
15. according to claim 1 or 2 or 3 described anaerobism microporous aerated oxidation ditch reactors, this reactor also comprises the supernatant liquor introducing wet well (21) wherein that the effluent weir (13) in this settling region (5) is discharged, this wet well (21) is arranged between this settling region (5) and this aerobic zone (4), comprises in this wet well (21):
The part supernatant liquor of in supernatant liquor return flow line (R1) this effluent weir (13) being discharged is back to the supernatant liquor reflux pump (22) in this hydrolysis area (1); And
To introduce supernatant liquor this wet well from this effluent weir (13) and discharge rising pipe (25) outside this reactor, this rising pipe (25) is communicated with clear water transport pipe after the external treatment.
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| CN 201020585496 CN201952322U (en) | 2010-10-26 | 2010-10-26 | Anaerobic micropore aeration oxidation ditch reactor |
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| CN 201020585496 CN201952322U (en) | 2010-10-26 | 2010-10-26 | Anaerobic micropore aeration oxidation ditch reactor |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102001787A (en) * | 2010-10-26 | 2011-04-06 | 北京市环境保护科学研究院 | Anaerobic microporous aerator oxidation ditch reactor and sewage treatment method |
| CN103204585A (en) * | 2012-10-17 | 2013-07-17 | 林金华 | Activated sludge process for sewage treatment |
| CN104003571A (en) * | 2013-02-27 | 2014-08-27 | 宁波市恒洁水务发展有限公司 | Biological nitrogen removal system and process thereof |
| CN104045150A (en) * | 2013-03-14 | 2014-09-17 | 上海市政工程设计研究总院（集团）有限公司 | Anaerobic acidification hydrolysis sedimentation tank for sewage pretreatment |
| CN104724826A (en) * | 2015-03-24 | 2015-06-24 | 浙江汉蓝环境科技有限公司 | Biochemical treatment method of industrial wastewater and aerobic tank |
| CN105502824A (en) * | 2015-12-25 | 2016-04-20 | 中铁城市规划设计研究院有限公司 | Intensive integration type small sewage treatment station |
| CN108217923A (en) * | 2017-12-29 | 2018-06-29 | 陕西科技大学 | Three ditch flows of one kind Orbal oxidation ditches flowing state regulating structure in the same direction and method |
| CN110304791A (en) * | 2019-06-26 | 2019-10-08 | 中国科学院生态环境研究中心 | Sewage imitates self-purification system and method |
| CN113998856A (en) * | 2021-11-12 | 2022-02-01 | 国能龙源环保南京有限公司 | Excrement plug-flow anaerobic reaction system |
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- 2010-10-26 CN CN 201020585496 patent/CN201952322U/en not_active Expired - Lifetime
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| CN102001787A (en) * | 2010-10-26 | 2011-04-06 | 北京市环境保护科学研究院 | Anaerobic microporous aerator oxidation ditch reactor and sewage treatment method |
| CN103204585B (en) * | 2012-10-17 | 2017-06-20 | 华鸿水务集团有限公司 | Sewage disposal process by activated sludge process |
| CN103204585A (en) * | 2012-10-17 | 2013-07-17 | 林金华 | Activated sludge process for sewage treatment |
| CN104003571A (en) * | 2013-02-27 | 2014-08-27 | 宁波市恒洁水务发展有限公司 | Biological nitrogen removal system and process thereof |
| CN104003571B (en) * | 2013-02-27 | 2016-04-06 | 宁波市恒洁水务发展有限公司 | The technique of biological denitrification system |
| CN104045150A (en) * | 2013-03-14 | 2014-09-17 | 上海市政工程设计研究总院（集团）有限公司 | Anaerobic acidification hydrolysis sedimentation tank for sewage pretreatment |
| CN104724826A (en) * | 2015-03-24 | 2015-06-24 | 浙江汉蓝环境科技有限公司 | Biochemical treatment method of industrial wastewater and aerobic tank |
| CN104724826B (en) * | 2015-03-24 | 2016-06-08 | 浙江汉蓝环境科技有限公司 | A kind of method of biochemical treatment industrial wastewater and Aerobic Pond |
| CN105502824A (en) * | 2015-12-25 | 2016-04-20 | 中铁城市规划设计研究院有限公司 | Intensive integration type small sewage treatment station |
| CN108217923A (en) * | 2017-12-29 | 2018-06-29 | 陕西科技大学 | Three ditch flows of one kind Orbal oxidation ditches flowing state regulating structure in the same direction and method |
| CN110304791A (en) * | 2019-06-26 | 2019-10-08 | 中国科学院生态环境研究中心 | Sewage imitates self-purification system and method |
| WO2022267082A1 (en) * | 2021-06-24 | 2022-12-29 | 贵州大学 | Integrated double-cycle oxidation ditch apparatus and treatment method for municipal sewage |
| CN113998856A (en) * | 2021-11-12 | 2022-02-01 | 国能龙源环保南京有限公司 | Excrement plug-flow anaerobic reaction system |
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