CN1911835A - Sequential air lifting circulation waste water biological treatment reactor and its process - Google Patents
Sequential air lifting circulation waste water biological treatment reactor and its process Download PDFInfo
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- CN1911835A CN1911835A CN 200610037337 CN200610037337A CN1911835A CN 1911835 A CN1911835 A CN 1911835A CN 200610037337 CN200610037337 CN 200610037337 CN 200610037337 A CN200610037337 A CN 200610037337A CN 1911835 A CN1911835 A CN 1911835A
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Abstract
The efficient sequencing batch type air lifting circular flow waste water treating bioreactor in alternative anoxia-anaerobic-aerobic process includes one squared or cylindrical reactor unit, one water inlet unit and one water outlet unit as well as one aerating system. The reactor unit includes one reactor body, one triphase separator, conic bottom, air lifting circular flow guide tube and upper deflecting baffle. The present invention also discloses corresponding technological process. By means of the sequencing batch type air lifting circular flow waste water treating bioreactor and the corresponding technological process, double target of oxidizing non-degradable organic pollutant and biological denitrification may be reached in the same reactor, the treated high concentration non-degradable nitrogenous industrial organic waste water may reach the drainage standard, and the residual sludge amount may be reduced by over 80%.
Description
Technical field
The invention belongs to the water pollution control applied technical field, relate to a kind of biological treatment and reactor assembly that contains the industrial organic waste water of high-concentration hardly-degradable organic pollutant and ammonia nitrogen in high density.
Background technology
Give off in the Industrial processes a large amount of high densitys poisonous/difficult degradation organic nitrogen-containing trade effluent such as yeast wastewater, monosodium glutamate waste liquid, coking chemical waste water, sauce waste water, percolate etc., its water quality characteristic is to contain poisonous Persistent organic pollutants of high density and ammonia nitrogen in high density.Aerobic/anaerobic and nitrated/denitrifying combination process are generally adopted in the processing of this class waste water, as A
2/ O, AB method, SBR technology etc.These technologies are based on the active sludge traditional technology of the suspension growth of microorganism and improve technology, and to containing the water quality bad adaptability of Persistent organic pollutants, degradation efficiency is not high.A
2The nitric efficiency of/O and adsorption biodegradation generally between 30%～40%, can not reach processing requirements.SBR technology is that preface is criticized intermittent activated sludge technology, and nitric efficiency is higher, but it is to the poor removal effect of Persistent organic pollutants.In addition, problems such as above-mentioned technology exists that operational path is long, return of waste water is than the mixed effect of big, unit structures or reactor and mass-transfer efficiency is low, need mud to reflux and excess sludge production is big, make unit structures (reactor) to high density poisonous/bad adaptability of hardly degraded organic substance, handle that load is low, initial cost and running cost is higher.
Research and industrialization practice both at home and abroad shows, bio membrane process high density poisonous/have special advantages aspect the processing of used water difficult to degradate.The employing of unit structures (reactor) is good at airlift bioreactor and biological fluidized-bed reactor.Bishop professor (the Safferman SI of scholar Safferman of U.S. Dayton university and Cincinnati university, BishopP.L.Joumal of hazardous materials, 1997,54 (3): 241-253) think, adopt the technology of airlift bioreactor or biological fluidized-bed reactor not only can make the organic pollutant removal maximized of used water difficult to degradate but also sludge yield is minimized.Therefore, bio membrane process (as the organism fluidization bed process) presents good prospects for application in the improvement of used water difficult to degradate.But the nitric efficiency of such technology is similar to aforementioned activated sludge process, maintains between 30%～40%, need just can make the discharged wastewater met the national standard that contains high concentration organic contaminant and ammonia nitrogen in high density simultaneously with nitrated/denitrification process coupling.
This shows, at the water quality characteristic of the industrial organic waste water that contains high-concentration hardly-degradable organic pollutant and ammonia nitrogen simultaneously, exploitation realizes that in same reactor the degraded of hardly degraded organic substance and the efficient wastewater treating process and the reactor of biological denitrificaion double goal will have a good application prospect.
Summary of the invention
The present invention is directed to traditional active sludge biological process of wastewater treatment and reactor bad adaptability to the high-concentration hardly-degradable organic pollutant, problems such as problem that degradation efficiency is low and biomembrance process reactor (as biological fluidized bed) nitrogen removal performance difference, propose the interior circulation waste water of a kind of new high-efficiency air lift type that adopts anoxic-anaerobic-aerobic to hocket and handle bio-reactor and technology, in same reactor, realize the oxidation of Persistent organic pollutants and the double goal of biological denitrificaion, make the nitrogenous industrial organic waste water of high-concentration hardly-degradable after treatment can qualified discharge, realize that simultaneously the residual sludge reduction degree reaches (than conventional activated sludge process) more than 80%.
Sequential air lifting circulation waste water biological treatment reactor of the present invention, the reactor assembly, water feed apparatus and the discharging device that comprise a square or cylinder mode, described reactor assembly comprises a reactor body, the reactor body top is connected with triphase separator, the below is connected with the awl end, the air-lift loop guide shell is installed in the reactor body, and has a upper reaches baffle to be fixed in air-lift loop guide shell top; Described reactor assembly also comprises an aerating system.
Described triphase separator is the scale-up version structure, links to each other with reactor body at 1/2 place of reactor body height, and triphase separator bottom and reactor body connecting place are opened the muddy and slippery hole that falls of a blowdown.
Described upper reaches baffle is fixed in air-lift loop guide shell top for falling the square or circular configuration of trumpet type with three point of suppon.
Described water feed apparatus comprises into water volume pump and inlet flume, is installed on the awl end and reactor body junction; The air feed of reactor adopts aerating system, comprises low-pressure aeration pump and aerating apparatus, is installed on reactor bottom; Described low-pressure aeration pump and water inlet volume pump all link to each other with sequence controller, and the water inlet and the running status of controlling reactor is set by time-program(me).
Described discharging device comprises water outlet weir notch, four water outlets and Rinsing Area, according to different draining ratios four water outlets is set and is positioned at triphase separator different heights place.
Reactor adopts biological ceramic particle or modified wood chips filling carrier, the mixed growth mode that microorganism combines with suspension growth and apposition growth in the reactor system.
The invention still further relates to a kind of sequential air lifting circulation waste water biological treatment, adopt above-mentioned sequential air lifting circulation waste water biological treatment reactor to carry out according to following steps:
1) fill phase: former water is pumped in the reactor through the water inlet volume pump by inlet flume, stops into water during to preset time, enters into step of reaction;
2) step of reaction: in reactor, carry out in the air-lift loop mode, and by controlling the air capacity that in reactor, feeds the switching time that the time-program(me) of regulating sequence controller (2) is alternately controlled the low-pressure aeration pump, thereby the anoxic that hockets-anaerobic-aerobic biochemical reaction process, Persistent organic pollutants and ammonia nitrogen in water inlet obtain efficient degradation even permineralization in this stage, to the preset time stopped reaction, enter the stage of leaving standstill;
3) leave standstill the stage: the muddy water mixed solution in the reactor separates in triphase separator by gravity settling, and wherein mud enters the awl end by mud landing hole, and supernatant liquor is waited to discharge;
4) bleeding stage: the supernatant liquor after standing sedimentation separates in the draining of setting than being disposed to out in the Rinsing Area by corresponding discharge outlet under the condition;
5) the idle stage: after the supernatant liquor discharging, reactor enters into lay-up period, promptly treats into water state.
Anoxic-anaerobic-aerobic sequence batch (alternate run program can be carried out arrange accordingly according to the changing condition of influent quality index and run duration water-quality guideline, thereby concrete grammar is the cycle that be provided with to change time of reprogramming controller reactor anoxic, anaerobism, aerobic biochemical reaction.
The invention still further relates to a kind of sequential air lifting circulation waste water biological treatment, adopt two or more sequential air lifting circulation waste water biological treatment reactors of the present invention, each reactor is in turn according to the listed step operation of the aforesaid a kind of sequential air lifting circulation waste water biological treatment of the present invention.
Be applied to the sequential air lifting circulation waste water biological treatment of above-mentioned reactor, its principle is:
(1) biological degradation of hardly degraded organic substance: the air-lift loop bioreactor waste water treatment process is a kind of biological reinforcing technology (Bioaugumentation), has not only had apposition growth method but also a tool suspension method growth characteristics, is a kind of typical compound system.In the startup of anoxic-anaerobic-aerobic alternate run and domestication process in the reactor microbial population through complicated ecological succession, generation is adapted to the feature enzyme system and the efficient dominant bacteria of difficult degradation substrate, and its theoretical basis is microorganism zymetology classical theory---induce-agree with theory.The fluidization operating method of reactor is to have created good mixing and mass transfer condition between difficult degradation substrate and the microorganism, no matter is that the oxygen or the transfer rate of matrix all are significantly improved than fixed bed and Sludge System.Its mixing time between 15～30s, oxygen mass transfer coefficient (K
La) between 18～25h
-1, to compare with the traditional active sludge treatment system, it is high by 20%～30% that oxygen transmits effect.Biological concentration reaches 10～20g/L in the system because the design of high effective three phase separator and the use of new bio filler make, be 4～5 times of conventional activated sludge process, increased substantially interfacial contact reaction and speed of reaction between Persistent organic pollutants and the microbial film.Therefore, this technology high density poisonous/present good performance aspect the processing of organic wastewater with difficult degradation thereby.
(2) biological denitrificaion: biological denitrificaion is mainly finished by two processes of nitrification and denitrification.Nitrobacteria is a class chemoautotrophic bacteria, comprises two physiology floras of nitrococcus and nitrifier, and its main characteristic is: nourish one's nature certainly, growth velocity is low, aerobic, dependency and product acidity (consumption basicity) etc.And denitrifying bacteria mostly is facultative heterotrophic bacteria, and its growth velocity is much higher than nitrobacteria.In biological denitrification process, nitrifying process is restricted step, and the raising stable and nitrated speed of nitrification is the key that influences the total system nitric efficiency.Studies show that the concentration of sewage rate of nitrification and nitrobacteria is proportionate.Therefore, the concentration of raising nitrobacteria has direct effect to the lifting of biological denitrificaion efficient.In the suspension growth system, be difficult to obtain and keep enough nitrobacteria concentration, and in the apposition growth system, nitrobacteria is grown in carrier surface with immobilization way, difficult quilt washes out system, so its biomass concentration is greatly improved.New and effective reactor of the present invention is because the high efficiency separation effect of triphase separator, make the nitrobacteria that grow the difficult generation time that retains in traditional biological treatment of waste water system major part to remain in the reactor assembly, increased substantially the efficient of biological nitration.After waste water enters reactor, along with the carrying out of biochemical reaction, COD
CrAnd COD
Cr/ NH
4 +-N constantly reduces, and for growth and the biological nitration effect of autotrophic microorganism in the system provides good condition, makes NH in the waste water
4 +-N almost completely is converted into NO
2 --N and NO
3 --N.Along with working procedure enters the anoxic stage, the NO that remaining organism produces as electron donor, nitrifying process in the system
2 --N and NO
3 --N realizes that as electron acceptor(EA) denitrification process is main biochemical reaction, by control of process condition, makes denitrification process not produce strong greenhouse gases N
2O, the final product of denitrogenation is with N
2Form discharge, realize biological denitrificaion efficiently.
(3) residual sludge reduction: excess sludge mainly results from aerobic stage in the biological wastewater treatment process.Because reactor of the present invention adopts triphase separator efficiently, the excess sludge that makes aerobic stage produce obtains still resting in the reactor system after the good separation in triphase separator, wherein active strong biomass with biomembranous form attached to proceeding biological degradation on the carrier, and active low biomass comes off from carrier surface under the distinctive HYDRODYNAMIC CONDITION RELATING TO of airlift reactor, is present in the reactor with suspended state.Along with the operation of reactor enters anoxic-anaerobic stages, the aging gradually so that self-dissolving of the microbial cells of suspended state, under anaerobic, thalline is cleared up in a large number.Clear up the sequence batch (operation of product, finally obtain mineralising, thereby realize the minimizing of excess sludge through reactor.
Sequential air lifting circulation waste water biological treatment according to above principle design, handle the industrial organic waste water that contains high-concentration hardly-degradable organic pollutant and high ammonia nitrogen in the mode that anoxic-anaerobic-aerobic hockets, operate through the sequence batch (intermittent operation, make waste water in reaction unit, experience organic bio-oxidation and two processes of biological nitration-denitrification biological denitrogenation, in same reactor, realize the function of oxidation operation and biological denitrificaion.
The present invention has realized goal of the invention by above-mentioned reactor and technology, compared with prior art, has the following advantages:
(1) sequential air lifting circulation waste water biological treatment reactor good mixing effect, mass-transfer efficiency height.Its mixing time between 15～30s, oxygen mass transfer coefficient K
LaBetween 18～25h
-1, to compare with the traditional active sludge treatment system, it is high by 20%～30% that oxygen transmits effect.
(2) reactor moves under the state that anoxic-anaerobic-aerobic hockets, and micro-flora presents very abundant population structure through complicated ecological succession in the system, and the nitrogenous organic industrial sewage of high density is efficiently handled in this system.
(3) reacting appliance has well behaved novel texture triphase separator, make the residence time of biomass in reactor extend to 30～40d, the mixed growth mode that microorganism combines with suspension growth and apposition growth in the reactor system, but biological concentration reaches 10～20g/L in the realization response system, be 4～5 times of traditional active sludge system, realize the high biological concentration operation down of reactor, improved the biological degradation efficient of Persistent organic pollutants.
(4) compare with sequencing batch active sludge (SBR) technology, because the present invention has adopted well behaved triphase separator, makes mud-water-gas three phase separation effect strengthen greatly, need not be provided with and strain hydrophone and second pond, the reactor water outlet is limpid, and water outlet SS is lower than 10mg/L.
(5) anoxic-anaerobic-aerobic sequence batch (alternate run program can be according to the influent quality index (as COD
Cr, BOD
5, BOD
5/ COD
Cr, COD
Cr/ NH
4 +Parameters such as-N) and the changing condition of run duration water-quality guideline and carry out arrange accordingly, process control method is flexible.Adopting process optimal control program makes a large amount of excess sludges be cut down at anaerobic stages, reaches the effect of residual sludge reduction more than 80%.
(6) technology involved in the present invention is operated through the sequence batch (intermittent operation, make waste water in reaction unit, experience organic biological degradation and two processes of biological nitration-denitrification biological denitrogenation, in same reactor, realize the double goal of organic matter degradation and biological denitrificaion.
Description of drawings
Fig. 1 is a sequential air lifting circulation waste water biological treatment reactor device synoptic diagram;
Fig. 2 is a plurality of reactor simultaneous treatment scheme synoptic diagram of intaking continuously.
Among the figure: 1 low-pressure aeration pump; 2 sequence controllers; 3 water inlet volume pumps; 4 inlet flumes; 5 mud landing holes; 6 triphase separators; 7 air-lift loop guide shells; 8 water outlet weir notches; 9 upper reaches baffles; 10 main reaction region flow aprons; 11 water outlets one; 12 water outlets two; 13 water outlets three; 14 water outlets four; 15 Rinsing Areas; 16 reactor bodies; The 17 awl ends; 18 inner draft tube fixed support pin; 19 shore pipes; 20 aerating apparatuss; 21 magnetic valves.
Embodiment
Below in conjunction with drawings and Examples, describe sequential air lifting circulation waste water biological treatment reactor disclosed in this invention and technology in detail.
Embodiment one
Reaction unit of the present invention and waste water treatment process at object waste water be the industrial organic waste water that contains high density/Persistent organic pollutants and high ammonia nitrogen, as percolate, yeast wastewater, coking chemical waste water, monosodium glutamate waste liquid etc.The adaptable waste water quality characteristic range of reactor is: COD
Cr:≤1500mg/L, NH
4 +-N :≤300mg/L.The waste water that concentration is higher than this compass enters reactor setting under the situation of suitable draining than (i.e. control water inlet thinning ratio), also can realize good treatment effect.
The technical solution used in the present invention is: adopt a kind of circular configuration, contain circulation bioreactor device in the air lift type of novel inner member, its aspect ratio is 3～6: 1, as shown in Figure 1.
The new-type bioreactor structure is as follows: reactor body 16 tops are connected with triphase separator 6, and the below is connected with the awl end 17; Air-lift loop guide shell 7 is fixed in three air-lift loop guide shell feets 18 at the bottom of the awl of reactor on 17; Upper reaches baffle 9 is fixed in plane on the air-lift loop guide shell 7 with three point of suppon.
Described novel inner member is meant high effective three phase separator 6 and upper reaches baffle 9.Triphase separator 6 is the scale-up version structure; 1/2 place is attached thereto at reactor body 16 height; triphase separator 6 bottoms and reactor body 16 connecting places are opened the muddy and slippery hole 5 that falls of a blowdown; make isolating mud of process and biological particles landing to the reactor main reaction region; make the residence time of biomass in reactor extend to 30～40d, the interior biological concentration of reaction system is 4～5 times of traditional active sludge system.In addition, mud landing hole 5 is to open several apertures at main reaction region flow apron 10 lower planes and triphase separator 6 joints, the 10L reactor that adopts with present embodiment is an example, the perforate size is arc length 40mm * high 15mm, percentage of open area 70～80% so that through the mud after the three phase separation smoothly hole landing from then on enter the reactor body reaction zone and be degree.Be provided with shore pipe 19 in awl bottom, the ends 17 in addition, excessive as sludge quantity in the reactor, can regularly discharge a small amount of mud by shore pipe 19.The design of triphase separator also can avoid wash out reactor system than long nitrifier generation time, effectively promotes the nitrated performance of reactor.
Open four water outlets at triphase separator different heights place: water outlet 1 (being positioned at water outlet weir notch 8 exits), water outlet 2 12, water outlet 3 13 and water outlet 4 14, for be provided with different drainings than the time draining required; Other is provided with Rinsing Area 15 for collecting the gained clear water; Reactor is provided with water outlet weir notch 8, is installed on the tip position of triphase separator 6, and tool overflow effect makes reactor can overflow be unlikely to the biomass that runs off again when the operation of full weir.
Upper reaches baffle 9 is for falling the square or circular configuration of trumpet type, be positioned at 30～40mm place in plane on the inner draft tube, be fixed in plane on the guide shell with three point of suppon, the setting of upper reaches baffle 9 can change the fluidised form on reactor top, reduce the disturbance of gas-liquid circulation, guarantee the high efficiency of three phase separation three-phase separation area.
The water feed apparatus of reactor comprises water volume pump 3 and inlet flume 4, is installed on the awl end 17 and reactor body 16 junctions; The air feed of reactor adopts aerating system, comprises low-pressure aeration pump 1 and aerating apparatus 20, and aerating apparatus 20 adopts titanium alloy micropore sieve plate aerator, is installed on reactor bottom; Described low-pressure aeration pump 1 and water inlet volume pump 3 all link to each other with sequence controller 2, and the water inlet and the running status of controlling reactor is set by time-program(me).
Reactor adopts carriers such as biological ceramic particle or modified wood chips filler, makes the mixed growth mode that microorganism combines with suspension growth and apposition growth in the system, and biological concentration can reach 10～20g/L in the reaction system.
The invention still further relates to a kind of sequential air lifting circulation waste water biological treatment, adopt above-mentioned sequential air lifting circulation waste water biological treatment reactor to carry out according to following steps:
1) fill phase: former water is pumped in the reactor through water inlet volume pump 3 by inlet flume 4, stops into water during to preset time, enters into step of reaction.
2) step of reaction: under the air-lift loop effect, water inlet mixes with interior waste water of reactor and mud rapidly, constantly at reactor main reaction region internal recycle.Control the switch of low-pressure aeration pump 1 by the time-program(me) of regulating sequence controller 2 and control the air capacity that in reactor, feeds, thus the anoxic in realization response stage-anaerobic-aerobic biochemical reaction process.Can adjust the time-program(me) in each stage of anoxic-anaerobic-aerobic of reactor operation according to the influent quality index of reactor, with the sequence batch (operation scheme of realization response device; As time goes on, various biological oxidation-reductions take place in reactor, as denitrification of the nitrated/nitration product of the biological degradation of organic pollutant, ammonia nitrogen etc., Persistent organic pollutants and ammonia nitrogen in water inlet obtain efficient degradation even permineralization in this stage, to the preset time stopped reaction, enter into the stage of leaving standstill.
3) leave standstill the stage: the muddy water mixed solution in the reactor obtains good separation by gravity settling in the disengaging zone, wherein mud enters reactor bottom by mud landing hole 5, and supernatant liquor is waited to discharge; Too much as sludge quantity in the system, can regularly discharge a small amount of excess sludge from reactor bottom mud valve 19.
4) bleeding stage: the supernatant liquor after standing sedimentation separates than being disposed to out in the Rinsing Area 15 by corresponding discharge outlet under the condition, is set at 0.5 o'clock as the draining ratio in the draining of setting, and selects water port 14 to carry out draining.
5) the idle stage: after the supernatant liquor discharging, reactor enters into lay-up period, promptly treats into water state.
Owing to add carriers such as biological ceramic particle or modified wood chips filler in the reactor, in the circulation reaction system, in water, filling surface and hole inside will form fine and close microbial film to carrier at suitable hydraulics low suspension in air lift type.Reactor system is the complex reaction system that a kind of typical active sludge combines with biomembrance process.
In addition, anoxic-anaerobic-aerobic sequence batch (alternate run program can be according to the influent quality index (as COD
Cr, BOD
5, BOD
5/ COD
Cr, COD
Cr/ NH
4 +Parameters such as-N) and the changing condition of run duration water-quality guideline and carry out arrange accordingly, thus concrete grammar is time of reprogramming controller cycle that changes reactor anoxic, anaerobism, aerobic biochemical reaction or the cycle index that increases anoxic-anaerobic-aerobic cycle to be set.
Waste water experiences organic degraded and biological nitration-denitrification biological denitrogenation two class biochemical reactions in reaction unit, comprise following specific embodiment and feature:
(1) pending waste water pumps into new-type bioreactor, and organic degraded mainly occurs in initial 1～2 cycle of anoxic-anaerobic-aerobic sequence batch (round-robin.
(2) along with the carrying out of biochemical reaction, COD
CrAnd COD
Cr/ NH
4 +-N constantly reduces, and for growth and the biological nitration effect of autotrophic microorganism in the system provides good condition, makes NH in the waste water
4 +-N is converted into NO
2 --N and NO
3 --N, this stage does not consume organism substantially, and this is that nitration reaction is main reaction process.
(3) along with working procedure enters the anoxic stage, the NO that remaining organism produces as electron donor, nitrifying process in the system
2 --N and NO
3 --N realizes that as electron acceptor(EA) denitrification process is main biochemical reaction.
(4) after the anoxic-anaerobic-aerobic alternate run process of waste water through setting, hardly degraded organic substance in the water inlet and NH
4 +-N obtains the high-performance bio degraded, and the final product of bio-oxidation is CO
2, H
2O and N
2, realize standard wastewater discharge.
In the laboratory, adopt the sequential air lifting circulation waste water biological treatment reactor (cumulative volume is 10L) that present embodiment introduces and the nitrogenous organic waste water of a kind of typical high-concentration hardly-degradable of art breading---percolate, this waste water quality index is: COD
Cr2800mg/L; NH
4 +-N 530mg/L; SS 280mg/L; PH7.9.This moment, the C/N ratio of intaking was 5.3, and time-program(me) is set to: water inlet (0.5h)-anoxic (1h)-anaerobism (2h)-aerobic (4h)-draining (0.5h), can according to the biodegradability of water inlet to working procedure setting suitably adjust.Reduced as C/N, water inlet biodegradability variation, the cycle index that then can consider to prolong loop cycle or increase anoxic-anaerobic-aerobic process, setting program constantly circulates by anoxic-anaerobic-aerobic, enters into next cycle behind the water outlet qualified discharge again.In the present embodiment, setting the draining ratio is 0.5, and after testing, raw water pump is gone in the reactor, and the water-quality guideline of the mixed solution that forms with residue muddy water is: COD
Cr=1200～1500mg/L, NH
4 +-N=280～300mg/L, SS=80～100mg/L, pH=7.6.Under above-mentioned working procedure, anoxic-anaerobic-aerobic process circulation is carried out four cycles, and through handling, effluent index can reach: COD
Cr=80～100mg/L, NH
4 +-N=5～10mg/L, SS=5～10mg/L, pH=6.5～7.2.The removal efficient of each index reaches respectively: COD
Cr〉=93%, NH
4 +-N 〉=96%, SS 〉=90%.
Embodiment two
The integrated reactor of the present invention, its way of realization is except the single reactor intermittent operation that embodiment one introduces, it also can be a plurality of reactors water inlet continuously in parallel operation, be a kind of biological wastewater treatment reactive system of forming by two or more sequential air lifting circulation waste water biological treatment reactors, as shown in Figure 2.
Embodiment two shown in Figure 2 has adopted the reactor (I～IV) be connected in parallel of 4 equal volume.The structure of 4 reactors, technology and principle thereof are described identical with embodiment one.
In service, 4 reactor cycles of operation are provided with unanimity, when finishing into, reactor I promptly enters into the reaction period behind the water, this moment, II began water inlet, the rest may be inferred, when question response device IV began to intake, I had finished a reaction time (intaking-react-leave standstill-draining), entered into the state of idle (water to be advanced).After IV finished into water, I entered the fill phase of a new round again.Any reactor, operation scheme is all identical with the foregoing description one in I～IV.The parallel running of four reactors is controlled by sequence controller 2.Therefore, embodiment illustrated in fig. 2 two can realize continuous water inlet, rhythmic reaction.
Claims (9)
1, sequential air lifting circulation waste water biological treatment reactor, the reactor assembly, water feed apparatus and the discharging device that comprise a square or cylinder mode, it is characterized in that described reactor assembly comprises a reactor body (16), reactor body (16) top is connected with triphase separator (6), the below is connected with the awl end (17), air-lift loop guide shell (7) is installed in the reactor body (16), and has a upper reaches baffle (9) to be fixed in air-lift loop guide shell (7) top; Described reactor assembly also comprises an aerating system.
2, sequential air lifting circulation waste water biological treatment reactor according to claim 1, it is characterized in that described triphase separator (6) is the scale-up version structure, 1/2 place at reactor body (16) height links to each other with reactor body (16), bottom the triphase separator (6) and reactor body (16) connecting place open the muddy and slippery hole (5) that falls of a blowdown.
3, sequential air lifting circulation waste water biological treatment reactor according to claim 1 is characterized in that described upper reaches baffle (9) for falling the square or circular configuration of trumpet type, is fixed in air-lift loop guide shell (7) top with three point of suppon.
4, sequential air lifting circulation waste water biological treatment reactor according to claim 1 is characterized in that described water feed apparatus comprises into water volume pump (3) and inlet flume (4), is installed on the awl end (17) and reactor body (16) junction; The air feed of reactor adopts aerating system, comprises low-pressure aeration pump (1) and aerating apparatus (20), is installed on reactor bottom; Described low-pressure aeration pump (1) and water inlet volume pump (3) all link to each other with sequence controller (2), and the water inlet and the running status of controlling reactor is set by time-program(me).
5, sequential air lifting circulation waste water biological treatment reactor according to claim 1, it is characterized in that described discharging device comprises water outlet weir notch (8), 4 water outlets (11,12,13,14) and Rinsing Area (15), four water outlets (11,12,13,14) are positioned at triphase separator (6) different heights place.
6, sequential air lifting circulation waste water biological treatment reactor according to claim 1; it is characterized in that reactor adopts biological ceramic particle or modified wood chips filling carrier, the mixed growth mode that microorganism combines with suspension growth and apposition growth in the reactor system.
7, a kind of sequential air lifting circulation waste water biological treatment is characterized in that: adopt the described sequential air lifting circulation waste water biological treatment reactor of the arbitrary claim of claim 1 to 6 to carry out according to following steps:
1) fill phase: former water is pumped in the reactor through water inlet volume pump (3) by inlet flume (4), stops into water during to preset time, enters into step of reaction;
2) step of reaction: in reactor, carry out in the air-lift loop mode, and by controlling the air capacity that in reactor, feeds the switching time that the time-program(me) of regulating sequence controller (2) is alternately controlled low-pressure aeration pump (1), thereby the anoxic that hockets-anaerobic-aerobic biochemical reaction process, Persistent organic pollutants and ammonia nitrogen in water inlet obtain efficient degradation even permineralization in this stage, to the preset time stopped reaction, enter the stage of leaving standstill;
3) leave standstill the stage: the muddy water mixed solution in the reactor separates in triphase separator (6) by gravity settling, and wherein mud enters the awl end (17) by mud landing hole (5), and supernatant liquor is waited to discharge;
4) bleeding stage: the supernatant liquor after standing sedimentation separates in the draining of setting than being disposed to out in the Rinsing Area by corresponding discharge outlet under the condition;
5) the idle stage: after the supernatant liquor discharging, reactor enters into lay-up period, promptly treats into water state.
8, sequential air lifting circulation waste water biological treatment according to claim 7, it is characterized in that: anoxic-anaerobic-aerobic sequence batch (alternate run program can be carried out arrange accordingly according to the changing condition of influent quality index and run duration water-quality guideline, thereby concrete grammar is the cycle that be provided with to change time of reprogramming controller reactor anoxic, anaerobism, aerobic biochemical reaction.
9, a kind of sequential air lifting circulation waste water biological treatment, it is characterized in that: adopt the described sequential air lifting circulation waste water biological treatment reactor of the arbitrary claim of two or more claims 1 to 6, each reactor is in turn according to the described step operation of claim 7.
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