CN202542999U - Enhanced phosphorus and nitrogen removal device - Google Patents
Enhanced phosphorus and nitrogen removal device Download PDFInfo
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- CN202542999U CN202542999U CN2012200769547U CN201220076954U CN202542999U CN 202542999 U CN202542999 U CN 202542999U CN 2012200769547 U CN2012200769547 U CN 2012200769547U CN 201220076954 U CN201220076954 U CN 201220076954U CN 202542999 U CN202542999 U CN 202542999U
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Abstract
The utility model discloses an enhanced phosphorus and nitrogen removal device, which comprises an anaerobic-anoxic device, a secondary sedimentation tank and a biological aerated filter. An anaerobic zone of the anaerobic-anoxic device is connected with a primary sedimentation tank, a degassing zone of the anaerobic-anoxic device is connected with the secondary sedimentation tank, and the secondary sedimentation tank is connected with the anaerobic zone of the anaerobic-anoxic device through a sludge pump; and the outlet water of the secondary sedimentation tank is connected to the biological aerated filter, and the water outlet of the biological aerated filter is connected to an anoxic zone of the anaerobic-anoxic device and a water distribution zone at the bottom of the biological aerated filter. Denitrifying phosphorus accumulating bacteria become dominant bacteria of an anodic aluminum oxide (AAO) unit by process regulation, so that separation of phosphorus accumulating bacteria and nitrifying bacteria, separation of sedimentation and sludge storage functions of the secondary sedimentation tank and separation of nitrifying and filtering functions of the biological aerated filter are realized, and energy conservation, stability, efficient nitrogen and phosphorus removal and sludge reduction of a combined system are finally realized.
Description
Technical field
The utility model belongs to the dirty water living creature processing technique field, is specially adapted to carrying of sewage work and marks the newly-built of transformation and advanced treatment of wastewater factory, is specifically related to a kind of A/A-O device that is used for the strengthened denitrification of WWT.
Background technology
At present, the sewage work of China more than 90% can not reach the one-level A emission standard of increasingly stringent, and key issue is that TN, TP and SS can't stably reaching standards.Because China town sewage C/N is generally lower; It is lower to be used for the VFA of anaerobic phosphorus release, need add a large amount of additional carbons in the biological carbon and phosphorous removal treating processes, and Sewage Plant does not adopt energy-saving and cost-reducing technology yet; Make working cost generally higher, ton water running expense is nearly 2 times of developed country.And a large amount of excess sludge that Sewage Plant produces can not get dealing carefully with, and the environmental problem that causes also relatively significantly.
PolyP bacteria, denitrifying bacteria and nitrifier coexistence in the AAO denitrification dephosphorization system; There is contradiction and competition carbon source on of mud on age; Make that polyP bacteria anaerobic phosphorus release efficient is not high; The nitrifier nitrification efficiency is low, and aeration energy consumption is big, is difficult in the good result that obtains denitrogenation dephosphorizing in the single biochemical system simultaneously; And the nitric nitrogen in the aerobic zone water outlet is prone to denitrification takes place in second pond, makes the mud come-up, influences the normal operation of system.Because China town sewage C/N is generally lower, it is lower to be used for the VFA of anaerobic phosphorus release, and the shortage of carbon source makes that the problem that exists originally in the AAO technology denitrogenation dephosphorizing is more outstanding.
BAF (Biological Aerated Flilter; BAF) be the sewage disposal technology of the degraded of collection biomembrane biochemistry and filtering layer filtering function and one; The ubiquity work period was short when but BAF was used for handling sewage separately; Back flushing is frequent, and filler be prone to stop up and problem such as harden.
AAO-BAF integrates AAO and BAF advantage, and anti-hydraulic load ability is strong, and is strong to the temperature variation adaptive faculty; Through separating of polyP bacteria and nitrifier, can stablize and realize the denitrification dephosphorization technology, realize that a carbon is dual-purpose; Save aeration rate, reduce sludge yield, reduce working cost.But also there are some problems in this combination process, and DO is higher like the BAF water outlet, makes aerobic heterotrophic bacterium breeding in the oxygen-starved area, AAO unit, restriction AAO denitrification dephosphorization efficient; The pollutent that upward flow BAF holds back is mainly in the filter material layer bottom, and the pollutent of holding back when forward recoiling passes whole filter material layer, and not only the energy consumption height also makes BAF top clear water polluted; Owing to the interference of aeration has slackened the strainability of BAF, it is higher that the microbial film that comes off etc. is used water suspension SS.
How on energy-saving and cost-reducing and the basis that effectively utilizes former water carbon source, improve the denitrogenation dephosphorizing effect of combined process system, realize mud process decrement simultaneously, become the great demand of present stage sewage treatment area.
The utility model content
The purpose of the utility model is to present AAO technological problems; In conjunction with energy-saving and cost-reducing, carbon source is effectively utilized and three gordian techniquies of mud decrement, proposes a kind of waste disposal plant, makes the denitrification phosphorus-collecting bacterium become the unitary superiority bacteria spp of AAO through the technology adjustment; Realize separating of polyP bacteria and nitrifier; Separating of second pond deposition and storage mud function, BAF nitrated with the separating of filtering function, realize finally that combined system is energy-conservation, stable, high-efficient denitrification and dephosphorization and mud decrement.
In order to reach above-mentioned purpose of design, the technical scheme that the utility model adopts is following:
A kind of reinforced phosphor-removing denitrifying device comprises anaerobic-anoxic device, second pond, BAF; The anaerobic zone of said anaerobic-anoxic device connects preliminary sedimentation tank, and the degas zone of anaerobic-anoxic device is connected with second pond, and second pond is connected with the anaerobic zone of anaerobic-anoxic device through sludge pump; The water outlet of said second pond is connected to BAF, and the water outlet of said BAF is connected to the oxygen-starved area and the BAF bottom water distributing area of anaerobic-anoxic device.
Preferably, the packing layer of said BAF is provided with two phase separator, and two phase separator is connected with the oxygen-starved area of peristaltic pump with the anaerobic-anoxic device through valve.
Preferably, the water outlet of said second pond is connected to intermediate pool, and intermediate pool is connected with BAF.
Preferably, the water outlet of said BAF is connected to clean water basin, and clean water basin are connected to the oxygen-starved area and the BAF bottom water distributing area of anaerobic-anoxic device.
More preferably, said reinforced phosphor-removing denitrifying device also comprises gas blower, and gas blower is connected with BAF through the gentle flowmeter body of aeration pipeline.
More preferably, said BAF is nitrated/reactor drum, and the filtrate bottom is nitrated section, and nitrated deoxidation fillter section is disturbed for no gas in top.
More preferably, the sludge outlet of said second pond is provided with delivery pipe.
More preferably, bottom the said BAF blow-off valve is set.
More preferably, said clean water basin are provided with rising pipe.
The beneficial effect of the described reinforced phosphor-removing denitrifying device of the utility model is: the BAF strainability is strong and backwashing period is long, and the system sludge productive rate is low, realizes under the low C/N condition that municipal effluent is efficient, stable, suspended substance is removed in the advanced nitrogen dephosphorization.
Combination process has been used denitrification dephosphorization technology to the full extent, and the system sludge productive rate is low, and energy consumption is low, and the BAF strainability is strong and backwashing period is long, realizes under the low C/N condition that municipal effluent is efficient, stablizes, the advanced nitrogen dephosphorization removes suspended substance.
The AA-BAF combination process is realized separating of polyP bacteria and nitrifier, and nitrification efficiency is high, and all mud all pass through complete anaerobism anoxic process, and denitrogenation dephosphorizing power is strong;
The denitrification dephosphorization The Application of Technology realizes the dual-purpose process decrement with mud of a carbon;
The AA unit is not nitrated, and nitric nitrogen has been alleviated the come-up or the disintegration of mud in the second pond to the influence of anaerobic phosphorus release in the removal returned sluge, guarantees the steady running of second pond;
The setting of two phase separator among the BAF realizes nitrated and filtering the separation, eliminates aeration to filtering disturbance, intensive filtration function, the effectively catching suspended substance that microbial film etc. forms that comes off;
The setting of two phase separator among the BAF reduces the DO of nitrification liquid in refluxing, and suppresses in the oxygen-starved area, AA unit aerobic heterotrophic bacterium to the competition of carbon source, improves the anaerobic environment of denitrifying bacteria and denitrifying phosphorus removing bacteria in the AA unit, raising denitrogenation dephosphorizing efficient;
BAF back flushing draining is through being arranged on the water shoot discharging of the middle water layer of BAF, not disturbance BAF top clear water layer during recoil, backwash operation time weak point.
Description of drawings
Fig. 1 is the structural representation of the described reinforced phosphor-removing denitrifying device of the utility model;
Wherein: the 1-preliminary sedimentation tank; 2-storage mud denitration pond; 3-anaerobic-anoxic device; The 4-anaerobic zone; The 5-oxygen-starved area; The 6-degas zone; The 7-second pond; The 8-intermediate pool; The 9-HPP; The 10-BAF; The 11-clean water basin; The 12-rising pipe; 13-nitrification liquid reflux pump; The 14-sludge reflux pump; The 15-gas blower; The 16-gas meter; The 17-two phase separator; The 18-air valve; The 19-air pump; The 20-backwashing pump; 21-back flushing water intaking valve; 22-back flushing water shoot; The 23-blow-off valve; The 24-delivery pipe.
Embodiment
Below in conjunction with accompanying drawing the optimum implementation of the utility model is done further detailed description.
As shown in Figure 1, the described reinforced phosphor-removing denitrifying device of the utility model embodiment mainly is linked in sequence by preliminary sedimentation tank 1, anaerobic-anoxic device 3, second pond 7, intermediate pool 8, BAF 10 and clean water basin 11 and forms; Said anaerobic-anoxic device 3 is the AA device of AAO treatment process; Said preliminary sedimentation tank 1 is connected with the anaerobic zone 4 of anaerobic-anoxic device 3 through intake pump 2; Under action of gravity, the flow through oxygen-starved area 5 and 6 of anaerobic-anoxic device 3 of muddy water mixed solution, the degas zone 6 of anaerobic-anoxic device 3 is connected with second pond 7, and second pond 7 is connected with the anaerobic zone 4 of anaerobic-anoxic device 3 through sludge pump 14; After mud gets into second pond 7; Deliver to the anaerobic zone of anaerobic-anoxic device 3, said second pond 7 is provided with delivery pipe 24, and excess sludge is discharged from delivery pipe 24; The water outlet of said second pond 7 is connected to intermediate pool 8, and intermediate pool 8 is connected with BAF 10 through HPP 9, and said BAF 10 is connected to clean water basin 11, and clean water basin 11 are provided with rising pipe 12.
Said clean water basin 11 are connected with the oxygen-starved area 5 of anaerobic-anoxic device 3 through nitrification liquid reflux pump 13, make the interior nitrification liquid that forms of BAF be back to anaerobic-anoxic device 3 as electron acceptor(EA); Said clean water basin 11 are connected with BAF 10 bottom water distributing areas with valve 21 through backwashing pump 20, and the water in the clean water basin 11 is back to BAF 10 as recoil water; The packing layer of said BAF 10 is provided with the two phase separator 17 that is used to collect weary gas, and two phase separator 17 is connected with the degas zone 6 of anaerobic-anoxic device 3 with air pump 19 through air valve 18; During use; The weary gas that two phase separator 17 in the BAF 10 is collected is realized the secondary aeration through aeration pipeline and aerator in the degas zone of anaerobic-anoxic device 3; Completion improves the sludge settling performance to the stripping of nitrogen, reduces the biosystem aeration energy consumption; BAF 10 middle parts of upward flow do not have filtrate, water layer in the middle of forming, and not disturbance BAF 10 top clear water layers during back flushing, the draining of recoil water is discharged from the water shoot 22 of BAF 10; Said BAF 10 bottoms are provided with blow-off valve 23.
Said BAF 10 is nitrated/reactor drum, and the filtrate bottom is nitrated section, is dominant bacteria this autotrophic type nitrifier, accomplishes the nitrated of ammonia nitrogen, holds back suspended substance simultaneously; Nitrated deoxidation fillter section is disturbed for no gas in top, efficiently holds back the suspended substance that the microbial film that comes off etc. forms, and guarantees that water outlet SS reaches one-level A emission standard.
Said reinforced phosphor-removing denitrifying device also comprises gas blower 15, and gas blower 15 is connected with BAF 10 through the gentle flowmeter body 16 of aeration pipeline.
It is following to utilize this device specifically to carry out sewage treatment process:
1) sewage gets into the anaerobic zone 4 of anaerobic-anoxic device 3 from preliminary sedimentation tank 1; In anaerobic zone 4 releases phosphorus, muddy water mixed solution is under action of gravity, with the formula of seething the flow through anaerobic zone 4 and oxygen-starved area 5 of anaerobic-anoxic device 3; Carry out denitrification dephosphorization denitrification, and in degas zone 6, remove the nitrogen bubble of generation;
2) sewage gets into second pond 7 from above-mentioned degas zone 6, realizes mud-water separation, and the supernatant that contains ammonia nitrogen flows into intermediate pool 8, gets into BAF 10 bottoms through HPP 9; Mud is discharged through delivery pipe 24, and second pond 7 is stable, and mud come-up or disintegration do not take place;
3) the superiority bacteria spp nitrifier in the above-mentioned BAF is converted into nitric nitrogen with ammonia nitrogen, and its hydraulic detention time is 1h, and GWR is 8, and nitrification liquid gets into clean water basin 11 after filtration and deoxidation, and treating water is through rising pipe 12 dischargings;
4) the rich phosphorus sludge that does not contain nitrate salt in the second pond 7 gets into the anaerobic zone 4 of anaerobic-anoxic devices 3 in the above-mentioned steps 2 through sludge reflux pump 14; Establish whipping appts in the pond, return sludge ratio is 100%, and hydraulic detention time is 2h; PolyP bacteria in the mud utilizes the low molecular weight volatile property organic acid (VFA) in the sewage; Synthetic PHB accomplishes a large amount of releases of phosphorus, and it is high to release phosphorus speed; Large amount of organic is transformed rapidly in the sewage, accounts for 80% of combination process in the removal of 4 couples of COD of anaerobic zone;
5) mixing sludge in the step 4 is established whipping appts from above-mentioned anaerobic zone 4 entering oxygen-starved areas 5 in the pond, and the deoxidation nitrification liquid of BAF 10 entering clean water basin 11 is through nitrification liquid reflux pump 13 entering oxygen-starved areas 5 simultaneously; Dissolved oxygen concentration in the oxygen-starved area 5 is very low, less than 0.3, has suppressed the predation of aerobic heterotrophic bacterium to carbon source; Denitrifying bacteria utilizes the remaining carbon source denitrification denitrogenation of polyP bacteria in the anaerobic zone; The denitrification phosphorus-collecting bacterium is an electron acceptor(EA) with the nitrate nitrogen, is electron donor with PHB, and denitrification dephosphorization takes place; The nitrification liquid reflux ratio is 300%, and its hydraulic detention time is 8h;
6) muddy water mixed solution in the step 55 flows into degas zones 6 from the oxygen-starved area; Degas zone 6 hydraulic detention times are merely 1h, and the oxidation of ammonia nitrogen does not take place, and main effect is to accomplish the removal of phosphoric residue and the stripping of nitrogen; Improve the sludge settling performance, the mixed solution sludge concentration is 2500mg/L;
7) sewage gets into second pond 7 from above-mentioned degas zone 6, realizes mud-water separation, and mud is discharged through delivery pipe 24, and the supernatant that contains ammonia nitrogen flows into intermediate pool 8, gets into BAF 10 through HPP 9, after BAF 10 oxide treatment, discharges.
Said this device specifically carries out sewage treatment process and has also added gas blower 15: gas blower 15 through gas meter 16 and aeration pipeline from BAF 10 bottom aerations; The two phase separator 17 that is arranged at the filtrate middle part of BAF 10 is collected weary gas, in the degas zone 6 of anaerobic-anoxic device 3, realizes the secondary aeration through the aeration pipeline.
After the operation of said BAF 10 to 15d, the release of middle water layer generation phosphorus is carried out back flushing to BAF 10.
Said BAF 10 back flushinges water inlet is the water outlet of clean water basin 11; Contain water shoot 22 dischargings of the back flushing draining of a large amount of pollutents through water layer in the middle of being arranged on; Not disturbance BAF 10 top clear water layers during recoil; The back flushing energy consumption is low, and the BAF work period prolongs.
For guaranteeing stable, the efficient operation of combined system, creationary two gordian techniquies having used in the AA-BAF system of the utility model: denitrification dephosphorizing reactor and deoxidation BAF.The AA unit is denitrification dephosphorization type reactor drum, and is not nitrated, and nitric nitrogen has been alleviated the come-up or the disintegration of mud in the second pond to the influence of anaerobic phosphorus release in the removal returned sluge, guarantees the steady running of second pond; Deoxidation BAF is nitrated/reactor drum, and the filtrate middle part is provided with two phase separator, and the bottom is nitrated section, is dominant bacteria this autotrophic type nitrifier, accomplishes the nitrated of ammonia nitrogen, holds back suspended substance simultaneously; Deoxidation BAF disturbs nitrated deoxidation fillter section for no gas in top, efficiently holds back the suspended substance that the microbial film that comes off etc. forms, and guarantees that water outlet SS reaches one-level A standard; The setting of two phase separator among the BAF reduces the DO in the nitrification liquid backflow.
Above content is the further explain that combines concrete preferred implementation that the utility model is done, and is convenient to these those skilled in the art and can understands and use the utility model, can not assert that the practical implementation of the utility model is confined to these explanations.For the those of ordinary skill of technical field under the utility model, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, and needn't pass through performing creative labour.Therefore, those skilled in the art should be within the protection domain of the utility model to the simple modifications that the utility model is made according to the announcement of the utility model.
Claims (1)
1. a reinforced phosphor-removing denitrifying device is characterized in that: comprise anaerobism-hypoxia device, second pond, BAF; The anaerobic zone of said anaerobic-anoxic device connects preliminary sedimentation tank, and the degas zone of anaerobic-anoxic device is connected with second pond, and second pond is connected with the anaerobic zone of anaerobic-anoxic device through sludge pump; The water outlet of said second pond is connected to BAF, and the water outlet of said BAF is connected to the oxygen-starved area and the BAF bottom water distributing area of anaerobism-hypoxia device.
2, according to the described reinforced phosphor-removing denitrifying device of claim 1, it is characterized in that: the packing layer of said BAF is provided with two phase separator, and two phase separator is connected with the oxygen-starved area of peristaltic pump with the anaerobic-anoxic device through valve.
3, according to the described reinforced phosphor-removing denitrifying device of claim 2, it is characterized in that: the water outlet of said second pond is connected to intermediate pool, and intermediate pool is connected with BAF.
4, according to the described reinforced phosphor-removing denitrifying device of claim 3, it is characterized in that: the water outlet of said BAF is connected to clean water basin, and clean water basin are connected to the oxygen-starved area and the BAF bottom water distributing area of anaerobism-hypoxia device.
5, according to claim 1 or 2 or 3 or 4 described reinforced phosphor-removing denitrifying devices, it is characterized in that: said reinforced phosphor-removing denitrifying device also comprises gas blower, and gas blower is connected with BAF through the gentle flowmeter body of aeration pipeline.
6, according to claim 1 or 2 or 3 or 4 described reinforced phosphor-removing denitrifying devices, it is characterized in that: said BAF is nitrated/reactor drum, and the filtrate bottom is nitrated section, and nitrated deoxidation fillter section is disturbed for no gas in top.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012200769547U CN202542999U (en) | 2012-03-02 | 2012-03-02 | Enhanced phosphorus and nitrogen removal device |
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| CN2012200769547U CN202542999U (en) | 2012-03-02 | 2012-03-02 | Enhanced phosphorus and nitrogen removal device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103304098A (en) * | 2013-06-19 | 2013-09-18 | 江苏大学 | Volcanic filler-based sewage treatment system of biological aerated filter |
| CN105776770A (en) * | 2016-05-06 | 2016-07-20 | 云南大学 | Sewage deep purifying device with high adaptivity and method thereof |
-
2012
- 2012-03-02 CN CN2012200769547U patent/CN202542999U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103304098A (en) * | 2013-06-19 | 2013-09-18 | 江苏大学 | Volcanic filler-based sewage treatment system of biological aerated filter |
| CN105776770A (en) * | 2016-05-06 | 2016-07-20 | 云南大学 | Sewage deep purifying device with high adaptivity and method thereof |
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Granted publication date: 20121121 |
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