CN103964633A - Integrated efficient biological reactor and reaction process thereof - Google Patents
Integrated efficient biological reactor and reaction process thereof Download PDFInfo
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- CN103964633A CN103964633A CN201410161802.0A CN201410161802A CN103964633A CN 103964633 A CN103964633 A CN 103964633A CN 201410161802 A CN201410161802 A CN 201410161802A CN 103964633 A CN103964633 A CN 103964633A
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- 206010021143 Hypoxia Diseases 0.000 claims abstract description 134
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- 238000001914 filtration Methods 0.000 claims abstract description 34
- 239000010865 sewage Substances 0.000 claims abstract description 20
- 230000001954 sterilising effect Effects 0.000 claims abstract description 8
- 230000001146 hypoxic effect Effects 0.000 claims abstract description 7
- 238000001556 precipitation Methods 0.000 claims abstract description 4
- 208000018875 hypoxemia Diseases 0.000 claims description 123
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 97
- 238000012856 packing Methods 0.000 claims description 50
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 40
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- 230000000694 effects Effects 0.000 claims description 13
- 230000008859 change Effects 0.000 claims description 10
- 238000007667 floating Methods 0.000 claims description 9
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- 239000000945 filler Substances 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 7
- 229910002651 NO3 Inorganic materials 0.000 claims description 6
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 6
- 238000011068 loading method Methods 0.000 claims description 6
- 230000000630 rising effect Effects 0.000 claims description 6
- 229920004935 Trevira® Polymers 0.000 claims description 3
- 230000000249 desinfective effect Effects 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 32
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 16
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 13
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 13
- 239000011574 phosphorus Substances 0.000 abstract description 13
- 230000001360 synchronised effect Effects 0.000 abstract description 12
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 25
- 238000006396 nitration reaction Methods 0.000 description 23
- 241000894006 Bacteria Species 0.000 description 17
- 230000008569 process Effects 0.000 description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 12
- 229910052799 carbon Inorganic materials 0.000 description 12
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 10
- 230000003647 oxidation Effects 0.000 description 8
- 238000007254 oxidation reaction Methods 0.000 description 8
- 239000001205 polyphosphate Substances 0.000 description 7
- 235000011176 polyphosphates Nutrition 0.000 description 7
- 229920000388 Polyphosphate Polymers 0.000 description 6
- 229920000037 Polyproline Polymers 0.000 description 6
- 229910021529 ammonia Inorganic materials 0.000 description 5
- 229910019142 PO4 Inorganic materials 0.000 description 4
- 230000007954 hypoxia Effects 0.000 description 4
- 239000011259 mixed solution Substances 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 4
- 239000010452 phosphate Substances 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 230000031068 symbiosis, encompassing mutualism through parasitism Effects 0.000 description 4
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- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical class OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 2
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- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
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- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention relates to an integrated efficient biological reactor and reaction process thereof. The integrated efficient biological reactor comprises an anoxic zone, an anaerobic zone, a hypoxic zone, a hypoxic filling zone, a precipitation zone, a filter cloth filtering zone and a sterilizing zone. The reactor adopts the integrated structure, is compact in overall design and occupies a small area. With adoption of the reaction process, the sewage treatment is low in energy consumption the efficiency is high, partial nitrification, synchronous nitrification and denitrification and denitrifying phosphorus removal are realized, and the treatment efficiency of nitrogen and phosphorus removal is high.
Description
Technical field
The invention belongs to sewage treatment area, relate to waste disposal plant, be specifically related to high-efficient integrated biologic reactor and technique thereof.
Technical background
Anaerobic-anoxic-aerobic process (A
2o technique) because simple structure, total hrt are short, control complicacy little, be difficult for producing the advantages such as sludge bulking, be widely used in existing municipal sewage plant of China.But A
2o technique exists substrate competition, mud contradiction in age, nitrogen removal rate to be difficult to some problems such as raising.The technology such as short-cut nitrification and denitrification, synchronous nitration and denitrification and denitrification dephosphorization can effectively improve A
2the processing efficiency of O technique.
It has been generally acknowledged that, nitratedly completed by two stages, first ammonia nitrogen is oxidized generation nitrite nitrogen, and that participated in this reaction is ammonia oxidation bacteria (AOB); Nitrite nitrogen is further oxidized generation nitrate nitrogen, and the microorganism that has participated in this reaction is NOB (NOB).Although belong to aerobic autotrophic bacterium, but there is very large difference at aspects such as physiological properties in AOB and NOB, therefore can be beneficial to the living environment that AOB growth suppresses NOB growth by construction, and this two classes bacterial classification is screened.Thereby nitration reaction is controlled to the first stage, realizes short distance nitration.The superiority of short-cut nitrification and denitrification is: shortened reaction mechanism, NO
2 -the denitrification rate of-N is higher than NO
3 --N, has improved denitrification rate; Shorten hydraulic detention time, reaction vessel is corresponding to be reduced; Oxygen requirement reduces 25%, and power consumption reduces; Save 37.5% denitrifying carbon source; Reduce excess sludge discharge amount.
Traditional theory thinks that the removal of nitrogen is by these two separate process implementations of nitrification and denitrification, due to the requirement difference to envrionment conditions, these two processes can not occur simultaneously, and can only carry out by list type, be that nitration reaction occurs under aerobic condition, anti-nitration reaction occurs under the condition of strict anoxic or double oxygen (hypoxemia).But research in recent years shows, can in same reactor, there is (especially in aeration tank, occurring) in nitrification and denitrification simultaneously, in aeration tank in many actual motions, also usually find the total nitrogen loss that can produce considerably beyond assimilation, this phenomenon is called as synchronous nitration and denitrification (SND).The superiority of synchronous nitration and denitrification is: improve the clearance of total nitrogen, broken traditional A
2the restriction that O reactor nitrogen removal rate can only improve by increasing internal reflux ratio; Reduce the NO in returned sluge
x -the concentration of-N, has alleviated the competition contradiction of denitrogenation dephosphorizing to matrix.
Traditional theory thinks that the removal of phosphorus is by polyP bacteria (PAOs) anaerobic phosphorus release and these two process implementations of aerobic suction phosphorus.But increasing research shows, under the operational conditions replacing at anaerobic/anoxic, easily enrichment one class have concurrently denitrification and dephosphorization function amphimicrobe---Denitrifying Phosphate Accumulating Organisms (DPB), they can utilize O
2or NO
x --N is as electron acceptor(EA).When application denitrification dephosphorizing reactor Treating Municipal Sewage, not only can save 30% aeration rate and the consumption of 50%COD, be excess sludge production but also can reduce approximately 50%, thereby reduce investment outlay and working cost.
Therefore, A
2if O technique can realize short-cut nitrification and denitrification, synchronous nitration and denitrification and denitrification dephosphorization by reasonably optimizing internal structure, will greatly improve processing efficiency, realize energy-saving and cost-reducing simultaneously.In addition, along with in short supply with land resources of improving constantly of emission standard, only improve A
2o technique is difficult to meet the requirement that water suspension (SS), need to arrange with the integrated combination of advanced treatment process, thereby meet the current demand of higher effluent quality and less floor space.
Summary of the invention
Technical problem
In order to solve A
2the problem that the synchronous removal effect of nitrogen phosphorus is not good, carbon source is not enough and energy consumption is higher existing in O process operation, the invention provides high-efficient integrated biologic reactor and reaction process thereof.
Technical scheme
The invention provides high-efficient integrated biologic reactor, described reactor comprises oxygen-starved area, anaerobic zone, hypoxemia district, hypoxemia packing area, settling region, filter-cloth filtering district and sterilizating area,
Oxygen-starved area sidewall arranges water inlet pipe, and the first partition wall is set between oxygen-starved area and anaerobic zone, in the position at the two ends away from the first partition wall, the first training wall is set, and in anaerobic zone, with the water (flow) direction of oxygen-starved area, frequency conversion submersible water impeller is set inversely;
Anaerobic zone is connected with hypoxemia district by the water hole that is located at sidewall, in hypoxemia district with the first partition wall second partition wall that be arranged in parallel, in the position at the two ends away from the second partition wall, the second training wall is set, between the second partition wall and anaerobic zone with the reverse frequency conversion submersible water impeller that arranges of frequency conversion submersible water impeller, in hypoxemia district, be provided with microbubble aeration plate, water outlet position, hypoxemia district is arranged on line dissolved oxygen meter and frequency conversion reflux pump through walls;
Between hypoxemia district and hypoxemia packing area, interception grid is set, floating stuffing and microbubble aeration plate are set in hypoxemia packing area;
Hypoxemia packing area is connected with settling region by band grid water hole, and water outlet position, hypoxemia packing area is arranged on line redox potential instrument;
Adjacent and the between setting in settling region and oxygen-starved area is filter-cloth filtering district and the sterilizating area of arranging up and down, sterilizing unit is set in sterilizating area, bottom sets out water pipe, top, settling region sets out mill weir, inside, settling region arranges inclined tube and in bottom, shore pipe is set, and frequency conversion reflux pump through walls is set in bottom is connected with oxygen-starved area;
Outside at reactor arranges blast pipe, and the two ends of blast pipe are connected with hypoxemia district and hypoxemia packing area through artificial atmosphere valve respectively;
Online dissolved oxygen meter connects artificial atmosphere valve, adjusts the open degree of artificial atmosphere valve according to the numerical value change scope of online dissolved oxygen meter;
On-line oxidation reduction potential instrument is connected with artificial atmosphere valve, adjusts the open degree of artificial atmosphere valve according to the numerical value change scope of on-line oxidation reduction potential instrument;
The cross section of described the first training wall and the second training wall is arc.
High-efficient integrated biologic reactor as above, the side in hypoxemia packing area away from hypoxemia district also arranges interception grid.
High-efficient integrated biologic reactor as above, setting party's chip filter cloth filter core in filter-cloth filtering district, filter core is made up of stainless steel frame and trevira filter cloth, and the back flushing frequency of filter cloth adopts liquid level and two-parameter control of time, and backwash mode adopts online reciprocating pump to inhale.
High-efficient integrated biologic reactor as above, described sterilizing unit is submerged ultraviolet disinfecting tube.
Reaction process based on high-efficient integrated biologic reactor as above is:
Sewage enters oxygen-starved area through water inlet pipe, flows into inversely anaerobic zone carry out denitrification and dephosphorization along training wall and oxygen-starved area, and internal recycle is realized in the space consisting of between oxygen-starved area and anaerobic zone frequency conversion submersible water impeller;
Sewage after circulation enters hypoxemia district through water hole, under the effect of the second training wall, first flow into the region between the second partition wall and anaerobic zone, and by frequency conversion submersible water impeller at hypoxemia district internal recycle, part of contaminated water is back to oxygen-starved area by the frequency conversion reflux pump through walls at water outlet position, hypoxemia district, and all the other sewage enter hypoxemia packing area through the interception grid being arranged between hypoxemia packing area and hypoxemia district;
Through the sewage of hypoxemia packing area nitrification and denitrification processing, band grid water hole enters after settling region precipitation, water outlet by effluent weir overflow to filter-cloth filtering district, enter after filtering sterilizating area, water body after purification is discharged through rising pipe, part mud is back to oxygen-starved area through frequency conversion reflux pump through walls, and part mud is discharged through shore pipe;
Wherein hypoxic/anaerobic district recycle ratio is 100～300%; Hypoxemia district nitrate recirculation ratio 100%～300%; Anoxic/hypoxemia district reflux ratio 50%～150%; Return sludge ratio 50%～100%, filler packing ratio is 20%～40%, and dissolved oxygen concentration is 0.60 ± 0.20mg/L, and redox potential is 0 ± 50mv.
Reaction process as above, operating parameter is:
1) BOD sludge loading: sludge loading 0.08～0.10kgBOD
5/ kgMLSSd;
2) total hrt HRT:12～15h;
3) mud SRT:15～20d in age;
4) filter-cloth filtering filtering velocity: 6～9m/h.
Beneficial effect
High-efficient integrated biologic reactor as above comprises oxygen-starved area, anaerobic zone, hypoxemia district, hypoxemia packing area, settling region, filter-cloth filtering district and sterilizating area, adopt rational Design on Plane to reduce aeration rate, preposition by oxygen-starved area, mud and mixed solution are all refluxed and all can carry out sufficient anti-nitration reaction.In addition, adopt the pump through walls of low lift and large flow rate to replace traditional submersible pump, realized efficient mixed-liquor return and sludge reflux, reduced operation energy consumption, saved running cost.The water outlet of settling region, rear end makes full use of the discrepancy in elevation, and water outlet directly enters filter-cloth filtering and sterilizating area, and reasonable in design and compact construction, has improved land utilization ratio.
The technique of high-efficient integrated biologic reactor as above is effectively combined into one oxygen-starved area, anaerobic zone, hypoxemia district, hypoxemia packing area, settling region, filter-cloth filtering district and sterilizating area, effectively saves floor space.Aspect dephosphorization, by building internal-circulation type anaerobic/anoxic environment, realize the enrichment of Denitrifying Phosphate Accumulating Organisms, reduce the demand of system to carbon source by denitrification dephosphorization, improved processing efficiency simultaneously.Aspect denitrogenation, by the competing environment of life of difference in functionality district and control low dissolved axygen is set, can stablize and realize short distance nitration-synchronous nitration and denitrification (being SDN via nitrite), save the demand to carbon source.In same sludge system, realize the efficient coupling of short distance nitration-synchronous nitration and denitrification-denitrification dephosphorization.There is the complete enrichment of desired microorganisms because realizing short distance nitration, synchronous nitration and denitrification and denitrification dephosphorization reaction in engineering, therefore, be provided with aerobic (hypoxemia)-anoxic and reflux and sludge reflux, taken into full account the demand of practical application, thereby can effectively ensure effluent quality.
Specifically, be mainly reflected in the following aspects:
1) integrated structure: adopt integrated structure, oxygen-starved area, anaerobic zone, hypoxemia district, hypoxemia packing area, settling region, filter-cloth filtering district and sterilizating area are arranged and organically combined in order according to water (flow) direction, by secondary biochemical treatment and advanced treatment are combined, save reactor floor space;
2) many cyclic designs: reactor has 4 circulations, and each circulation can be given full play to effect separately, are respectively the circulation of hypoxic/anaerobic district, hypoxemia district internal recycle, the circulation of anoxic/hypoxemia district and sludge circulation.Wherein, 1. hypoxic/anaerobic district circulation: be conducive to the enrichment of denitrifying phosphorus removing bacteria, improve denitrogenation dephosphorizing efficiency; 2. hypoxemia district internal recycle: muddy water mixes, realizes short distance nitration and synchronous nitration and denitrification under hypoxia condition; 3. anoxic/hypoxemia district circulation: provide nitric efficiency, second stage employ carbon source; 4. sludge circulation: stabilized sludge concentration, improves denitrogenation dephosphorizing efficiency;
3) denitrogenation dephosphorizing efficiency is high: by the reasonable combination of each functional zone, system can realize efficient short distance nitration, synchronous nitration and denitrification and denitrification dephosphorization.Not only can improve the efficiency of denitrogenation dephosphorizing, and greatly reduce the demand of system to intake limited carbon source and dissolved oxygen, realize effectively energy-saving and cost-reducing.
4) effluent quality is secure: biochemical reaction end is provided with hypoxemia packing area, and the removal of strengthening pollutent, has reduced sludge discharge.In addition, be provided with filter-cloth filtering after settling tank, can ensure out well that water suspension reaches higher Effluent criteria, the physical filtering effect of filter cloth simultaneously can also be removed 5%～15% organism and nitrogen phosphorus.
5) operation energy consumption is low: compared with traditional denitrification and dephosphorization method, its aeration rate significantly reduces; Backflow required drive comes self frequency-changing's submersible water impeller and frequency conversion reflux pump through walls, and service rating, all lower than common reflux type, has been saved energy consumption and the expense of operation to a great extent.
6) level of automation is high: the present invention carries out feedback control by being arranged on line dissolved oxygen meter at water outlet position, hypoxemia district and being arranged on line redox potential instrument at water outlet position, hypoxemia packing area respectively, thereby realizes effectively independently regulate and control operation of two functional zone aerating systems.
Brief description of the drawings
Fig. 1 is the plot plan of the invention process system.
Fig. 2 is the process flow sheet of the invention process system.
Wherein, 1-oxygen-starved area; 2-anaerobic zone; 3-hypoxemia district; 4-hypoxemia packing area; 5-settling region; 6-filter-cloth filtering district; 7-sterilizating area; 8-water inlet pipe; 9-rising pipe; 10-shore pipe; 11a, 11b-frequency conversion submersible water impeller; 12a, 12b-frequency conversion reflux pump through walls; 13-effluent weir; 14-floating stuffing; 15-microbubble aeration plate; 16-inclined tube; 17a, 17b-artificial atmosphere valve; 18-blast pipe; 19-tackles grid; The online dissolved oxygen meter of 20-; 21-on-line oxidation reduction potential instrument; 22-water hole; 23-band grid water hole.
Embodiment
Embodiment 1
Below in conjunction with drawings and Examples, the present invention is further illustrated.
As shown in Figure 1, high-efficient integrated biologic reactor, comprises oxygen-starved area 1, anaerobic zone 2, hypoxemia district 3, hypoxemia packing area 4, settling region 5, filter-cloth filtering district 6 and sterilizating area 7;
Oxygen-starved area 1 sidewall arranges water inlet pipe 8, between oxygen-starved area 1 and anaerobic zone 2, the first partition wall is set, and in the position at the two ends away from the first partition wall, the first training wall is set, and in anaerobic zone 2, with the water (flow) direction of oxygen-starved area 1, frequency conversion submersible water impeller 11a is set;
Anaerobic zone 2 is connected with hypoxemia district 3 by the water hole 22 that is located at sidewall, in hypoxemia district 3 with the first partition wall second partition wall that be arranged in parallel, in the position at the two ends away from the second partition wall, the second training wall is set, between the second partition wall and anaerobic zone 2, with frequency conversion submersible water impeller 11a, frequency conversion submersible water impeller 11b is set, in hypoxemia district 3, be provided with microbubble aeration plate 15a, 3 water outlet positions, hypoxemia district are arranged on line dissolved oxygen meter 20 and frequency conversion reflux pump 12a through walls;
Interception grid 19 is set, interior floating stuffing 14 and the microbubble aeration plate 15b of arranging in hypoxemia packing area 4 between hypoxemia district 3 and hypoxemia packing area 4;
Hypoxemia packing area 4 is connected with settling region 5 by band grid water hole 23, and 4 water outlet positions, hypoxemia packing area are arranged on line redox potential instrument 21;
Settling region 5 and between setting adjacent with oxygen-starved area 1 is filter-cloth filtering district 6 and the sterilizating area 7 of arranging up and down, the interior sterilizing unit that arranges of sterilizating area 7, bottom sets out water pipe 9,5 tops, settling region set out mill weir 13,5 inside, settling region arrange inclined tube 16 and shore pipe 10 are set in bottom, and frequency conversion reflux pump 12b through walls is set in bottom is connected with oxygen-starved area 1;
In the outside of reactor, blast pipe 18 is set, the two ends of blast pipe 18 are connected with hypoxemia district 3 and hypoxemia packing area 4 through artificial atmosphere valve 17a, 17b respectively;
Online dissolved oxygen meter 20 connects artificial atmosphere valve 17a, adjusts the open degree of artificial atmosphere valve 17a according to the numerical value change scope of online dissolved oxygen meter 20;
On-line oxidation reduction potential instrument 21 is connected with artificial atmosphere valve 17b, adjusts the open degree of artificial atmosphere valve 17b according to the numerical value change scope of on-line oxidation reduction potential instrument 21;
The cross section of described the first training wall and the second training wall is arc.
For filtering water body carry from hypoxemia packing area compared with bigger material, make to enter the water body relative clean of settling region, the side in hypoxemia packing area 4 away from hypoxemia district 3 also arranges interception grid.
The reaction process of above-mentioned reactor is: sewage enters oxygen-starved area 1 through water inlet pipe 8, flows into anaerobic zone 2 carry out denitrification and dephosphorization along training wall, and internal recycle is realized in the space consisting of in oxygen-starved area 1 and anaerobic zone 2 frequency conversion submersible water impeller 11a;
Sewage after circulation enters hypoxemia district 3 through water hole 22, under the effect of the second training wall, first flow into the region between the second partition wall and anaerobic zone 2, and by frequency conversion submersible water impeller 11b at hypoxemia district 3 internal recycle, part of contaminated water is back to oxygen-starved area 1 by the frequency conversion reflux pump 12a through walls at 3 water outlet positions, hypoxemia district, and all the other sewage enter hypoxemia packing area 4 through the interception grid 19 being arranged between hypoxemia packing area 4 and hypoxemia district 3;
Through the sewage of hypoxemia packing area 4 nitrification and denitrification processing, band grid water hole 23 enters after settling region 5 precipitations, water outlet by effluent weir 13 overflows to filter-cloth filtering district 6, enter after filtering sterilizating area 7, water body after purification is discharged through rising pipe 9, part mud is back to oxygen-starved area 1 through frequency conversion reflux pump 12b through walls, and part mud is discharged through shore pipe 10;
Wherein hypoxic/anaerobic district recycle ratio is 100～300%; Hypoxemia district nitrate recirculation ratio 100%～300%; Anoxic/hypoxemia district reflux ratio 50%～150%; Return sludge ratio 50%～100%, filler packing ratio is 20%～40%, and dissolved oxygen concentration is 0.60 ± 0.20mg/L, and redox potential is 0 ± 50mv.
Operating parameter is:
1BOD sludge loading: sludge loading 0.08～0.10kgBOD
5/ kgMLSSd;
2 total hrt HRT:12～15h;
3 mud SRT:15～20d in age;
4 filter-cloth filtering filtering velocity: 6～9m/h.
A whole set of reactor adopts integrated design, and each functional zone connect compact, rationally distributed, has taken into full account the linking of front and back, each functional zone and necessary backflow.
Adopt the preposition form in oxygen-starved area 1, the mixed solution at 3 water outlet positions, hypoxemia district and the mud of settling region 5 are all back to oxygen-starved area 1.On the one hand can ensure to intake limited carbon source preferentially for denitrification, thereby improve nitric efficiency, also can avoid on the other hand the impact to anaerobic phosphorus release of nitric nitrogen that sludge reflux carries.
Oxygen-starved area 1 and anaerobic zone 2 adopt circulation mixed design, are provided with inner loop mode, and built-in frequency conversion submersible water impeller 11a has realized the mode of anaerobic/anoxic alternate run by internal recycling, and circulation multiple proportions is controlled at 100%～300%.Enrichment one class has the amphimicrobe of denitrification and dephosphorization function concurrently---Denitrifying Phosphate Accumulating Organisms (DPB).DPB can utilize oxygen or nitric nitrogen as electron acceptor(EA), and the biological metabolism principle of its poly-hydroxy fatty acid (PHA) based in body and glycogen matter is very similar to the polyP bacteria in traditional aerobic/anaerobic method.Anaerobism section, it is consistent with polyP bacteria (PAOs) in traditional dephosphorization process substantially that DPB releases phosphorus process; And in anoxic section, be different from PAOs using oxygen as electron acceptor(EA), DPB is using nitric nitrogen as the electron acceptor(EA) that is oxidized PHB in born of the same parents, utilize degraded anaerobism section to be stored in the energy ATP that the PHB in body produces, synthetic (synthesizing of glycogen) and the activity that sustains life that most of supply self is thin, a part of for excess ingestion water without phosphoric acid salt, and be stored in cell paste with the form of polyphosphoric acid salt (Poly-p); Nitric nitrogen is reduced to nitrogen simultaneously.So, under anaerobic/anoxic alternate run condition, can synchronously realize denitrification and dephosphorization double effects by the metabolism of DPB.
On the pipeline of blast aeration, adopt threeway setting, the air quantity of hypoxemia district and hypoxemia packing area all can be adjusted separately by the artificial atmosphere valve on pipeline.
Aeration zone is divided into two portions: hypoxemia district 3 and hypoxemia packing area 4.Wherein hypoxemia district 3 adopts circulation mixed design, water outlet position is arranged on line dissolved oxygen meter 20, online dissolved oxygen meter 20 and artificial atmosphere valve 17a interlock, control dissolved oxygen concentration is 0.60 ± 0.20mg/L, and frequency conversion reflux pump 12a through walls is set at water outlet position, by mixed-liquor return, to oxygen-starved area 1, control of reflux ratio is 50%～150%.In hypoxemia packing area 4, establish appropriate floating stuffing, filler packing ratio is 20%～40%, and interception grid is established in front and back end, and water outlet position is arranged on line redox potential instrument 21, on-line oxidation reduction potential instrument 21 is controlled with artificial atmosphere valve 17b interlock, and control redox potential is 0 ± 50mv.
Artificial atmosphere valve 17a on hypoxemia district 3 aeration airducts can adjust open degree by setting online dissolved oxygen meter numerical value change scope.Can make full use of dissolved oxygen in pond on the one hand, avoid energy wastage; Also be that topmost object is to utilize ammonia oxidation bacteria (AOB) and the different requirements of NOB (NOB) to raw competing environment on the other hand, utilize the condition of hypoxemia, realize the enrichment of ammonia oxidation bacteria (AOB), eluriate NOB (NOB), thereby the oxidation control of ammonia nitrogen, at Nitrification Stage, and is not further oxidized to nitrate.In addition, although hypoxemia district is in hypoxia condition, aerating system is evenly distributed, and is the microhabital of hypoxemia district construction micro oxygen enrichment, macro environment anoxic, thereby denitrifying bacteria group energy is reached and nitrifying bacteria community symbiosis, synchronously realize nitrification and denitrification reaction in hypoxemia district.Because dissolved oxygen concentration in hypoxemia district is relatively low, oxidation operation speed is low, for the reaction middle and later periods has been saved carbon source.In addition, because the nitrated oxygen requirement of initial reaction stage is large, under the condition of constant aerating, hypoxemia district front end easily forms anaerobic environment, and denitrifying metabolic activity is relatively strong, is easy to denitrifying generation.
In hypoxemia district 3, establish frequency conversion submersible water impeller 11b and carry out internal recycling, can avoid causing because aeration intensity is low on the one hand sludge settling; Muddy water fully can be mixed on the other hand, optimize internal flow state, strengthen mass transfer effect.Water outlet position, hypoxemia district is provided with mixed-liquor return, can be back to oxygen-starved area.The setting refluxing can further ensure denitrification effect, also can realize raising of internal carbon source simultaneously.
Hypoxemia packing area 4 is arranged on behind hypoxemia district 3, by adding appropriate floating stuffing 14, builds the processing environment of mud film symbiosis.Not only can increase specific surface area, improve sludge concentration, strengthening removal effect, and also the secondary that can utilize filler to realize internal carbon source raises, further denitrogenation dephosphorizing.The shearing force forming by the motion of floating stuffing, can carry out refinement cutting by rising bubble, has slowed down the upflow velocity of water oxygen, thereby improves the utilization ratio of oxygen.The microbial film simultaneously forming by filler top layer, has realized the symbiosis of activated sludge process and biomembrance process, has greatly improved removal efficiency.By ORP on-line Control, this regional control can be beneficial to the competing environment of the simultaneous life of nitrification and denitrification.
Artificial atmosphere valve 17b on the 4 aeration airducts of hypoxemia packing area can adjust open degree by setting online redox potential instrument 21 numerical value change scopes.Variation and the dissolved oxygen concentration of redox potential (ORP) are closely bound up.Under hypoxia condition, ORP can reflect well active sludge flco interior microscopic aerobic/ratio of anoxic.Within the specific limits, O
2/ OH
-keep relative stability, little on ORP impact, ORP is mainly subject to NH
3-N/NO
x -the impact of-N.Therefore, the scope of controlling ORP can be controlled the process of nitrification and denitrification well, is conducive to the realization of synchronous nitration and denitrification.Meanwhile, by online ORP, can ensure the hypoxemia packing area end oxygen environment of holding concurrently, further remove established nitrogen in water, reduce settling region mud rising phenomenon and occur.
Settling region 5 adopts tube settling, adopts effluent weir 13 water outlets, and bottom arranges that frequency conversion reflux pump 12b through walls carries out sludge reflux and shore pipe 10 carries out mud discharging.The frequency conversion reflux pump through walls that frequency conversion reflux pump 12b through walls is low lift and large flow rate.
Settling region 5 flow to filter-cloth filtering district 6 through effluent weir 13 water outlets.Setting party's chip filter cloth filter core in filtrating area, filter core is made up of stainless steel frame and trevira filter cloth, and the back flushing frequency of filter cloth adopts liquid level and two-parameter control of time, and backwash mode adopts online reciprocating pump to inhale.
Filter-cloth filtering district 6 adopts and builds up and down layout jointly with sterilizating area 7, and filter-cloth filtering district 6 up, can effectively save occupation of land.
Described sterilizing unit is submerged ultraviolet disinfecting tube.
Respectively the effect of each functional zone and major parts is elaborated below.
1) oxygen-starved area: the major function of oxygen-starved area is denitrification denitrogenation and denitrification dephosphorization.Nitric nitrogen is refluxed by hypoxemia district by inner circulating reflux.Mixed solution enters after anoxic section, denitrifying bacteria utilize organism in sewage by the nitrate-nitrogen reduction in backflow mixed liquor for nitrogen is discharged in air, effectively complete anti-nitration reaction, therefore organic concentration and nitrate all significantly reduce.Secondly there is the denitrification removal of phosphorus at this section, i.e. denitrification dephosphorization.Be mainly the mode that has realized anaerobic/anoxic alternate run by internal recycling, realized the enrichment of Denitrifying Phosphate Accumulating Organisms (DPB), DPB utilizes nitric nitrogen for electron acceptor(EA), has realized denitrification dephosphorization.
2) anaerobic zone: major function is anaerobic phosphorus release and organonitrogen ammonification.Under the zymogenic effect of amphimicrobian, the larger molecular organics of part readily biodegradable is converted into micromolecular voltaile fatty acid (VFA), polyP bacteria absorbs the synthetic PHB of these small organic molecules and is stored in cell, intracellular poly-phosphorus is hydrolyzed into orthophosphoric acid salt simultaneously, be discharged in water, the energy discharging can be survived for the aerobic polyP bacteria of obligate under the oppressive environment of anaerobism, dissolved phosphorus concentration in result sewage raises, and partly or entirely dissolved organic matter is utilized and makes BOD density loss in sewage.In addition, nitrogen is because of the synthetic part that also can be removed of cell.
3) hypoxemia district: hypoxemia district is multi-functional, removes the multinomial reactions such as organism, short distance nitration, synchronous nitration and denitrification and aerobic suction phosphorus and all can in these functional zone, carry out.In mixed solution, organic concentration is very low, polyP bacteria is mainly that the PHB by storing in decomposer obtains energy for self growth and breeding, the solvability orthophosphoric acid salt that excess absorbs in water simultaneously stores in vivo with the form of poly-phosphate, through post precipitation, phosphorous high mud is separated from water, reached the effect of dephosphorization.Organism is degraded by microbial biochemical, continues to decline; Organic amino by ammonification then by nitrated, NH
3-N concentration significantly declines.Along with the carrying out of nitrifying process, NO
x --N concentration increases.Utilize ammonia oxidation bacteria (AOB) different to the demand of oxygen with NOB (NOB), hypoxemia district is under the condition of long-term hypoxemia, can enriching ammonia oxidation bacteria (AOB), and then elutriation NOB (NOB), thereby the oxidation control of ammonia nitrogen, at Nitrification Stage, and is not further oxidized to nitrate.In addition, although hypoxemia district is in hypoxia condition, bottom aerating system is evenly distributed, and makes hypoxemia district present the microhabital of micro oxygen enrichment, macro environment anoxic, thereby make denitrifying bacteria can realize denitrification process simultaneously, and finally discharge with nitrogen form.
4) hypoxemia packing area: object is by floating stuffing, the double oxygen environment of structure mud film symbiosis, further realizes nitrification and denitrification.Adding of floating stuffing, can increase specific surface area effectively, is more conducive to the raising of sludge concentration, thereby improves removal efficiency.In addition, adding of filler can form on filler top layer microbial film, can realize the gradient of oxygen in longitudinal degree of depth of film, builds the competing environment of life of microcosmic anaerobism, thereby realizes raising of internal carbon source.
5) settling region: this district adopts high-density tube settling, muddy water is separated at this, and pump reflux through walls is to oxygen-starved area through bottom for part mud, and part mud is discharged through bottom shore pipe, can regularly discharge, supernatant liquor water outlet flow to next functional zone by overflow weir.
6) filter-cloth filtering district: this district is settling region effluent overflow weir water immediately, makes full use of the water level discrepancy in elevation, carries out filter cloth micron filter, can further remove suspended substance in water, also can further remove certain organism and nitrogen phosphorus by the filteration of filter cloth.
7) sterilizating area: this district and filter-cloth filtering district take the mode of building jointly up and down, make full use of the water level discrepancy in elevation, and have reduced floor space.By being discharged by rising pipe after ultraviolet ray sterilization bactericidal.
8) online dissolved oxygen meter: be arranged on line dissolved oxygen meter at water outlet position, hypoxemia district, be used for monitoring the dissolved oxygen concentration of water side, hypoxemia district, by setting dissolved oxygen concentration scope, can adjust artificial atmosphere valve and change Air Quantity Required, thereby farthest save energy consumption.
9) on-line oxidation reduction potential instrument: be arranged on line redox potential instrument at water outlet position, hypoxemia packing area, be used for monitoring the redox potential of water side, hypoxemia packing area, because there is cognation in redox potential and dissolved oxygen concentration, by setting redox potential scope, can change Air Quantity Required to artificial atmosphere valve, thereby farthest save energy consumption.
Present embodiment, taking the municipal wastewater of Taihu Lake basin Typical Sewage Water Treatment Plant low ratio of carbon to ammonium as research object, has been carried out verification experimental verification and has implemented research the method for patent of the present invention.Inlet and outlet water water quality is in table 1.
Table 1 is tested Inlet and outlet water water quality
Unit: mg/L
By can be calculated, system short distance nitration efficiency is 64.36%.Synchronous nitration and denitrification efficiency is 57.37%; Denitrification dephosphorization efficiency is 7.82%.
Above-described is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., within all should being included in protection scope of the present invention.
Claims (6)
1. high-efficient integrated biologic reactor, it is characterized in that: comprise oxygen-starved area (1), anaerobic zone (2), hypoxemia district (3), hypoxemia packing area (4), settling region (5), filter-cloth filtering district (6) and sterilizating area (7)
Oxygen-starved area (1) sidewall arranges water inlet pipe (8), between oxygen-starved area (1) and anaerobic zone (2), the first partition wall is set, in the position at the two ends away from the first partition wall, the first training wall is set, in anaerobic zone (2) with the reverse frequency conversion submersible water impeller (11a) that arranges of water (flow) direction of oxygen-starved area (1);
Anaerobic zone (2) is connected with hypoxemia district (3) by the water hole (22) that is located at sidewall, in hypoxemia district (3) with the first partition wall second partition wall that be arranged in parallel, in the position at the two ends away from the second partition wall, the second training wall is set, part and the reverse frequency conversion submersible water impeller (11b) that arranges of frequency conversion submersible water impeller (11a) in hypoxemia district (3) near anaerobic zone (2), in hypoxemia district (3), be provided with microbubble aeration plate (15a), water outlet position, hypoxemia district (3) is arranged on line dissolved oxygen meter (20) and frequency conversion reflux pump through walls (12a),
Interception grid (19) is set between hypoxemia district (3) and hypoxemia packing area (4), floating stuffing (14) and microbubble aeration plate (15b) are set in hypoxemia packing area (4);
Hypoxemia packing area (4) is connected with settling region (5) by band grid water hole (23), and water outlet position, hypoxemia packing area (4) is arranged on line redox potential instrument (21);
Settling region (5) and between setting adjacent with oxygen-starved area (1) is filter-cloth filtering district (6) and the sterilizating area (7) of arranging up and down, sterilizating area arranges sterilizing unit in (7), bottom sets out water pipe (9), top, settling region (5) sets out mill weir (13), inside, settling region (5) arranges inclined tube (16) and shore pipe (10) is set in bottom, and frequency conversion reflux pump through walls (12b) is set in bottom is connected with oxygen-starved area (1);
Blast pipe (18) is set in the outside of reactor, and the two ends of blast pipe (18) are connected with hypoxemia district (3) and hypoxemia packing area (4) through artificial atmosphere valve (17a, 17b) respectively;
Online dissolved oxygen meter (20) connects artificial atmosphere valve (17a), adjusts the open degree of artificial atmosphere valve (17a) according to the numerical value change scope of online dissolved oxygen meter (20);
On-line oxidation reduction potential instrument (21) is connected with artificial atmosphere valve (17b), adjusts the open degree of artificial atmosphere valve (17b) according to the numerical value change scope of on-line oxidation reduction potential instrument (21);
The cross section of described the first training wall and the second training wall is arc.
2. high-efficient integrated biologic reactor as claimed in claim 1, is characterized in that: away from a side of hypoxemia district (3), interception grid is also set in hypoxemia packing area (4).
3. high-efficient integrated biologic reactor as claimed in claim 1, it is characterized in that: filter-cloth filtering district (6) interior setting party's chip filter cloth filter core, filter core is made up of stainless steel frame and trevira filter cloth, the back flushing frequency of filter cloth adopts liquid level and two-parameter control of time, and backwash mode adopts online reciprocating pump to inhale.
4. high-efficient integrated biologic reactor as claimed in claim 1, is characterized in that: described sterilizing unit is submerged ultraviolet disinfecting tube.
5. the reaction process based on high-efficient integrated biologic reactor claimed in claim 1, is characterized in that:
Sewage enters oxygen-starved area (1) through water inlet pipe (8), flow into anaerobic zone (2) along training wall and carry out denitrification and dephosphorization, realize internal recycle by frequency conversion submersible water impeller (11a) space that (1) and anaerobic zone (2) forms in oxygen-starved area;
Sewage after circulation enters hypoxemia district (3) through water hole (22), under the effect of the second training wall, first flow into the region between the second partition wall and anaerobic zone (2), and by frequency conversion submersible water impeller (11b) at hypoxemia district (3) internal recycle, part of contaminated water is back to oxygen-starved area (1) by the frequency conversion reflux pump through walls (12a) at water outlet position, hypoxemia district (3), and all the other sewage enter hypoxemia packing area (4) through the interception grid (19) being arranged between hypoxemia packing area (4) and hypoxemia district (3);
Through the sewage of hypoxemia packing area (4) nitrification and denitrification processing, band grid water hole (23) enters after settling region (5) precipitation, water outlet by effluent weir (13) overflow to filter-cloth filtering district (6), enter after filtering sterilizating area (7), water body after purification is discharged through rising pipe (9), part mud is back to oxygen-starved area (1) through frequency conversion reflux pump through walls (12b), and part mud is discharged through shore pipe (10);
Wherein hypoxic/anaerobic district recycle ratio is 100～300%; Hypoxemia district nitrate recirculation ratio 100%～300%; Anoxic/hypoxemia district reflux ratio 50%～150%; Return sludge ratio 50%～100%, filler packing ratio is 20%～40%, and dissolved oxygen concentration is 0.60 ± 0.20mg/L, and redox potential is 0 ± 50mv.
6. reaction process as claimed in claim 5, is characterized in that:
Operating parameter is
1) BOD sludge loading: sludge loading 0.08～0.10kgBOD
5/ kgMLSSd;
2) total hrt HRT:12～15h;
3) mud SRT:15～20d in age;
4) filter-cloth filtering filtering velocity: 6～9m/h.
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Address after: Room 1001, Building 43, No. 618 Changxing Road, Jiangbei District, Ningbo City, Zhejiang Province, 315020 Patentee after: Zhongqing Ecological Environment (Zhejiang) Co.,Ltd. Country or region after: China Address before: No. 618 Changxing Road, Jiangbei District, Ningbo City, Zhejiang Province, 310000 Patentee before: Zhongqing ecological environment (Ningbo) Co.,Ltd. Country or region before: China |