CN105722796B - The control program of organic waste-water treating apparatus, the processing method of organic wastewater and organic waste-water treating apparatus - Google Patents

The control program of organic waste-water treating apparatus, the processing method of organic wastewater and organic waste-water treating apparatus Download PDF

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CN105722796B
CN105722796B CN201480062921.9A CN201480062921A CN105722796B CN 105722796 B CN105722796 B CN 105722796B CN 201480062921 A CN201480062921 A CN 201480062921A CN 105722796 B CN105722796 B CN 105722796B
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atmosphere
region
aerobic
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scope
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CN105722796A (en
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小原卓巳
山中理
时本宽幸
榎木辰彦
平冈由纪夫
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Toshiba Corp
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/006—Regulation methods for biological treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/308—Biological phosphorus removal
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/14—NH3-N
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/16—Total nitrogen (tkN-N)
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/18—PO4-P
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Abstract

The organic waste-water treating apparatus of embodiment has biological reaction tank, ammonia concentration determination device, full nitrogen concentration analyzer, full phosphorus concentration analyzer and control unit.Biological reaction tank has Anaerobic Treatment region, adjustment region and Aerobic Process for Treatment region, and adjustment processing region is between Anaerobic Treatment region and aerobic processing region.1 kind or two or more of atmosphere in adjustment region can be switched to anaerobism atmosphere, micro- aerobic atmosphere is become reconciled oxygen atmosphere.Ammonia concentration determination device is measured the ammonia density of the processing water in Aerobic Process for Treatment region.The full nitrogen concentration of full processing water of the nitrogen concentration analyzer to being flowed out from biological reaction tank is measured.The full phosphorus concentration of full processing water of the phosphorus concentration analyzer to being flowed out from the biological reaction tank is measured.Control unit is adjusted the scope of the atmosphere of adjustment region based on the value determined by ammonia concentration determination device, full nitrogen concentration analyzer and full phosphorus concentration analyzer.

Description

The processing method and treatment of Organic Wastewater of organic waste-water treating apparatus, organic wastewater The control program of device
Technical field
Technical scheme is related at organic waste-water treating apparatus, the processing method of organic wastewater and organic wastewater Manage the control program of device.
Background technology
In the past, in the sewage treatment plant of purified treatment is carried out to sanitary wastewater, as most representative technique, use Conventional actived sludge.Conventional actived sludge is following method：The aeration tank of air is being supplied into water using air blower In, using aerobic microbiological by organic dirty substance oxygenolysis in water.In the conventional actived sludge, organic matter can Decompose removal.But, the reason for eutrophication problem as discharge destination the nitrogen of substance, phosphorus in conventional actived sludge It can not remove.Therefore, it is dirty as standard activity as by the method for nitrogen and phosphorus ligands, having been carried out while organic matter is decomposed The circulating nitrification denitrogenation of the nitrogen removal type of the variation of mud method, the anaerobic-aerobic activated sludge process (AO of phosphorus ligands type Method), nitrogen phosphorus simultaneously removal type anaerobism-anaerobic-aerobic activated sludge process (A2O) the importing of the height treatment process such as method.
In height treatment process, using initial sedimentation basin from flowing into the single treatment water that forms of dirty water removal precipitating sludge It is sent to biological reaction tank.Next, in anaerobism groove, anaerobic groove and aerobic slot in biological reaction tank, pass through microorganism Reaction from single treatment water by organic matter, nitrogen, phosphorus ligands.Meanwhile the cohesion as microorganism is formed in biological reaction tank The flocculate of body.Then, the after-treatment water containing flocculate is sent to final sedimentation tank.In final sedimentation tank, flocculate By from after-treatment water sedimentation, removal.Sediment sends sludge back to from final sedimentation tank mostly as containing activated sludge Return to biological reaction tank.A part for sediment is discharged as excess sludge from final sedimentation tank, is burnt after thickening Burning processing.
The removal technique of the ammonia as nitrogen containing component in organic wastewater is as described below.First, in aerobic slot ammonia by nitre Acid ion aoxidizes.Nitrate ion after oxidation is sent back to anaerobic groove.Due to the effect nitrate anion of microorganism in anaerobic groove Ion is reduced by nitrogen.In addition, in the removal technique of phosphorus, phosphorus is made in anaerobism groove from Microbiological release.Next, aerobic In slot, microorganism is made to absorb phosphorus, the microorganism that absorbing has phosphorus is deposited removal as flocculate.The Institute of Micro-biology in aerobic slot The phosphorus amount of absorption is substantial amounts of compared with the phosphorus amount that Institute of Micro-biology discharges in anaerobism groove.Can be based on the burst size and uptake it Difference carries out the removal of phosphorus.
However, in order to import above-mentioned height processing method in existing wastewater treatment equipment, it is necessary in biological respinse Anaerobism groove, anaerobic groove and aerobic slot are newly set in slot.In particular, it is desirable to import the new machine such as mixer, pump and new New concrete skeleton is set.Transformation accordingly, there exist existing equipment spends labour and the situation of time.
In addition, in nitrogen phosphorus while the A of removal type2In O methods, there are shifting relations for the removal rate of nitrogen and phosphorus.Cause This, there is a possibility that be difficult to the concentration of the nitrogen handled in water and phosphorus being set to below limits value simultaneously.Therefore, in order to make place The concentration of nitrogen and phosphorus in reason water reduces simultaneously, has studied following technology：Being set between anaerobism groove and aerobic slot being capable of profit Switch the anaerobic-aerobic dual-purpose slot of anaerobic-aerobic with catheter type aerator (DTA), by using the rotary speed of DTA while cutting Stirring mode (anaerobism) and air dispersal pattern (aerobic) are changed while being handled, seeks to take into account the ammonia and phosphorus as nitrogen containing component Removal.
However, ammonia is an ingredient in nitrogen containing component.In terms of the removal of full nitrogen (T-N), it is important that good Into being about to reaction of the ammoxidation into nitrate ion, promote the denitrogenation that nitrate reduction is converted into nitrogen anti-in oxygen slot It should.Further it is necessary to newly set the anaerobic-aerobic dual-purpose slot marked off by partition wall, therefore, equipment improvement spends labour and time.
Prior art literature
Patent document
Patent document 1:Japanese Unexamined Patent Publication 2013-212490 publications
The content of the invention
The problem to be solved in the present invention is, provides a kind of nitrogen that can be removed simultaneously in organic wastewater and phosphorus and holds The organic waste-water treating apparatus that easily imports to existing equipment, the processing method and organic waste-water treating apparatus of organic wastewater Control program.
The organic waste-water treating apparatus of technical solution have biological reaction tank, ammonia concentration determination device, full nitrogen concentration analyzer, Full phosphorus concentration analyzer and control unit.
Biological reaction tank has Anaerobic Treatment region, adjustment region and Aerobic Process for Treatment region, and adjustment processing region is in Between Anaerobic Treatment region and aerobic processing region.
1 kind or two or more of gas in adjustment region can be switched to anaerobism atmosphere, micro- aerobic atmosphere is become reconciled oxygen atmosphere Atmosphere.
Ammonia concentration determination device is measured the ammonia density of the processing water in Aerobic Process for Treatment region.
The full nitrogen concentration of full processing water of the nitrogen concentration analyzer to being flowed out from biological reaction tank is measured.
The full phosphorus concentration of full processing water of the phosphorus concentration analyzer to being flowed out from the biological reaction tank is measured.
Control unit is based on the value pair determined by ammonia concentration determination device, full nitrogen concentration analyzer and full phosphorus concentration analyzer The scope of the atmosphere of adjustment region is adjusted.
Description of the drawings
Fig. 1 is the schematic diagram for the organic waste-water treating apparatus for representing the 1st embodiment.
Fig. 2 is the schematic diagram for the organic waste-water treating apparatus for representing the 2nd embodiment.
Fig. 3 is the schematic diagram for the organic waste-water treating apparatus for representing the 3rd embodiment.
Fig. 4 is the schematic diagram for the organic waste-water treating apparatus for representing the 4th embodiment.
Specific embodiment
Hereinafter, referring to the drawings to the organic waste-water treating apparatus of embodiment, the processing method of organic wastewater and organic The control program of wastewater treatment equipment illustrates.In addition, embodiment general structure is marked from beginning end it is identical attached Icon remembers that the repetitive description thereof will be omitted.In addition, each figure is the schematic diagram for promoting the explanation of embodiment and its understanding, shape Shape, size, ratio etc. exist and reality device difference, but these can with reference to the following description and well known technology and It is suitably designed change.
(the 1st embodiment)
The organic waste-water treating apparatus 1 of present embodiment shown in FIG. 1 includes initial sedimentation basin 2, life from upstream side successively Object reactive tank 3 and final sedimentation tank 4.
Biological reaction tank 3 is for carrying out the reaction vessel of purified treatment to sewage using the decomposition of microorganism. Anaerobic Treatment region 11, adjustment region 12 and aerobic processing region 13 are provided in biological reaction tank 3.Adjustment region 12 is set Between Anaerobic Treatment region 11 and aerobic processing region 13.Here, " between being arranged at ... " do not refer to concept spatially and Refer to that the order of the processing in adjustment region 12 is between Anaerobic Treatment region 11 and aerobic processing region 13.
Biological reaction tank 3 has for the inflow part of the organic wastewater inflow before purified treatment and for organic after purified treatment The outflow portion of waste water outflow.Inflow part is arranged near Anaerobic Treatment region 11.Outflow portion is arranged at Aerobic Process for Treatment region 13 Near.The water surface elevation of organic wastewater in Anaerobic Treatment region 11 is higher than the water of the organic wastewater in adjustment processing region 12 Face height.Adjust water of the water surface elevation higher than the organic wastewater in Aerobic Process for Treatment region 13 of the organic wastewater in processing region 12 Face height.In this way, the water surface elevation in Anaerobic Treatment region 11, adjustment region 12, Aerobic Process for Treatment region 13 is configured to step It is lower.
Anaerobic Treatment region 11 is set to account for 15~30% region of the internal capacity of biological reaction tank 3.Aerobic Process for Treatment area Domain 13 is set to account for 40~60% region of the internal capacity of biological reaction tank 3.The remainder of the internal capacity of biological reaction tank 3 It is divided into adjustment region 12.
Initial sedimentation basin 2 is to receive organic wastewater, stand the predetermined time, set the single treatment of floating material (SS) precipitation It is standby.Dykes and dams are provided in initial sedimentation basin 2, upper strata clear water crosses dykes and dams and flows into overflow line, further from overflow line Flow into biological reaction tank 3.In addition, the bottom of initial sedimentation basin 2 is connected with sludge discharge pipe (not shown), sludge by periodically or It discharges at any time.
Aerator 20 is provided on biological reaction tank 3 as aeration devices.Aerator 20 include air blower 21, from Air line 22 that air blower 21 extends is branched off arranged on the flow rate regulating valve 23 of air line 22, from air line 22 Branched pipe 24, arranged on each branched pipe 24 open and close valve 25a~25e and be installed on each branched pipe 24 top air expand Fall apart 26a~26e.Air diffuser plate 26a~26e is arranged at the inside of biological reaction tank 3.
Air diffuser plate 26a is arranged in the Anaerobic Treatment region 11 of biological reaction tank 3.In addition, air diffuser plate 26b, 26c is arranged at along the direction of processing water flowing in adjustment region 12.Moreover, air diffuser plate 26d~26e along processing current Dynamic direction is arranged in Aerobic Process for Treatment region 13.
In addition, in open and close valve 25a~25e of each branched pipe 24, be arranged at lead to Anaerobic Treatment region 11 point The open and close valve 25a of branch pipe 24 is set to " closing " always.In addition it is also possible to omit branched pipe 24, open and close valve 25a and air diffuser plate The setting of 26a.In addition, open and close valve 25d, 25e for being arranged at the branched pipe 24 for leading to Aerobic Process for Treatment region 13 are set to "ON" always. Moreover, the aperture for being arranged at open and close valve 25b, 25c of the branched pipe 24 for leading to adjustment region 12 is free to set.Open and close valve 25b, 25c are connected with aftermentioned control unit 9.Instruction based on control unit 9 controls the aperture of open and close valve 25b, 25c.It is logical The aperture for controlling these open and close valves 25b, 25c is crossed, the scope of the atmosphere in adjustment region 12 can be adjusted.It such as can The atmosphere of adjustment region 12 is set to anaerobism atmosphere, a kind or two or more that micro- aerobic atmosphere is become reconciled in oxygen atmosphere.
Moreover, the flow rate regulating valve 23 arranged on air line 22 is connected with blast volume controller 30.Pass through blast volume controller 30 Control, the flow of the air in air line 22 can be adjusted.
In addition, cohesion agent feeding device 50 is provided in the Aerobic Process for Treatment region 13 of biological reaction tank 3.It can be from flocculating agent Feedway 50 puts into flocculating agent to the processing water flowed in Aerobic Process for Treatment region 13.Agglomerate agent feeding device 50 with it is aftermentioned Control unit 9 connects.
The valve in Anaerobic Treatment region 11 is fully closed, therefore as anaerobism atmosphere (ORP value is in negative side) so that in steady running When anerobe become activity.More specifically, ORP value is below -200mV.Here, ORP value refers to redox electricity Position.The ORP value for handling water is negative situation it may be said that the processing water is in reducing condition.I.e., it is in anaerobism due to no aeration The current potential of sewage of state be lower (negative ORP value).In Anaerobic Treatment region 11, phosphorus carries out same from the release of microorganism When, carry out the reduction reaction from nitrate ion to nitrogen.
On the other hand, Aerobic Process for Treatment region 13 is adjusted to aerobic atmosphere (ORP value is in positive side) so that in steady running When in aerobic microorganism become activity.More specifically, ORP value is adjusted to be in the scope of more than 50mV.ORP value is Positive situation can be described as the processing water and be in the state of oxidation.I.e., it is in the place of aerobic state due to being fully aerated The current potential of reason water becomes higher.In Aerobic Process for Treatment region 13, carried out while carrying out microorganism to the absorption of phosphorus from ammonia to nitrate anion The oxidation reaction of ion.
Wantonly a kind or two in atmosphere can be switched to anaerobism atmosphere by adjustment region 12, micro- aerobic atmosphere is become reconciled oxygen atmosphere Kind or more.In addition, adjustment region 12 can to the scope shared by anaerobism atmosphere, micro- aerobic atmosphere and each atmosphere of aerobic atmosphere into Row adjustment.In the example depicted in figure 1, adjustment region 12 is divided into the 1st region 12a and the 2nd the two regions of region 12b.1st Region 12a is the corresponding region in setting position with air diffuser plate 26b, and the 2nd region 12b is and air diffuser plate 26c The corresponding region in position is set.In the 1st, the 2nd region 12a, 12b, it is able to independently switch atmosphere.
Here, micro- aerobic atmosphere refers to be adjusted to the atmosphere that ORP value is in the range of -50~50mV.Anaerobism atmosphere It is the atmosphere of the scope below -200mV, aerobic atmosphere is the atmosphere of the scope of more than 50mV, and therefore, micro- aerobic atmosphere can be with Say be in anaerobism atmosphere become reconciled oxygen atmosphere centre state.In micro- aerobic atmosphere, it is carried out at the same time from nitrate ion Reduction reaction to nitrogen and from ammonia to the oxidation reaction of nitrate ion.
The switching of atmosphere in adjustment region 12 is carried out by operating aerator 20.Aerator 20 is by aftermentioned control The instruction control in portion 9 processed.In the case of not from each air diffuser plate supply air of aerator 20, become anaerobism atmosphere. In the case where supplying air in large quantities from each air diffuser plate of aerator 20, become aerobic atmosphere.From aerator In the case that 20 each air diffuser plate marginally supplies air, become micro- aerobic atmosphere.Aerobic atmosphere and micro- aerobic atmosphere Switching could be adjusted to carry out by the aperture of open and close valve 25b, 25c to being arranged on branched pipe 24.For example, it is being set to aerobic atmosphere In the case of, the aperture of open and close valve 25b, 25c are set to standard-sized sheet (100% opens).In the case where being set to micro- aerobic atmosphere, will open 5~15% aperture of the aperture when aperture of valve closing 25b, 25c is set to standard-sized sheet.
In addition, in order to adjust the scope shared by each atmosphere, by expanding from two air for being arranged at adjustment region 12 The air quantity delivered of 26b, 26c of falling apart independently is controlled to carry out.Such as stopping both air diffuser plate 26b, 26c Air supply in the case of, entire adjustment region 12 become anaerobism atmosphere.In addition, stopping the air of air diffuser plate 26b In the case of having supplied a small amount of air from air diffuser plate 26c while supply, the 1st region 12a become anaerobism atmosphere, the 2nd Region 12b becomes micro- aerobic atmosphere.In addition, it is spread while a small amount of air has been supplied from air diffuser plate 26b from air In the case that plate 26c has supplied substantial amounts of air, the 1st region 12a becomes micro- aerobic atmosphere, and the 2nd region 12b becomes aerobic gas Atmosphere.Moreover, in the case where having supplied substantial amounts of air from both air diffuser plate 26b, 26c, entire adjustment region 12 into Preferably oxygen atmosphere.In the example depicted in figure 1, by setting two air diffuser plates 26b, 26c in adjustment region 12, will adjust Main plot domain 12 is further separated into two regions (the 1st, the 2nd region), but by further setting more air diffuser plates, will adjust Main plot domain 12 is divided into more regions, so as to be adjusted for greater flexibility to the atmosphere in adjustment region 12.
Sterilizing equipment decontaminating apparatus (not shown) is equipped in the downstream side of final sedimentation tank 4, the final process water after disinfection is via discharge With flow path to river, ocean disposal.
In addition, final sedimentation tank 4, which is provided with, sends piping 40 back to.The midway for sending piping 40 back to is provided with pump 41.Using sending Returning piping 40 makes to send sludge back to and handles a part for water always from the upstream portion of the return biological reaction tank 3 of final sedimentation tank 4.
In addition, ammonia concentration determination device 5, DO determination device 6, full nitrogen concentration are provided in organic waste-water treating apparatus 1 Analyzer 7 and full phosphorus concentration analyzer 8.Ammonia of the ammonia concentration determination device 5 to the processing water flowed in Aerobic Process for Treatment region 13 Concentration is measured.The dissolved oxygen amount of processing water of the DO determination device 6 to being flowed in Aerobic Process for Treatment region 13 is measured.Entirely Nitrogen concentration analyzer 7 and full phosphorus concentration analyzer 8 from biological reaction tank 3 and final sedimentation tank 4 respectively to from flowing out The full nitrogen concentration and full phosphorus concentration for managing water are measured.
Ammonia concentration determination device 5 and DO determination device 6 are connected with blast volume controller 30.Moreover, ammonia concentration determination device 5 It is connected with aftermentioned switch judgement part 9b.In addition, full nitrogen concentration analyzer 7 and full phosphorus concentration analyzer 8 are also cut with aftermentioned Change determination unit 9b connections.
Moreover, the control controlled the adjustment region 12 of biological reaction tank 3 is provided in organic waste-water treating apparatus 1 Portion 9 processed.Control unit 9 has desired value setting apparatus 9a and switch judgement part 9b.Control unit 9 is for example by with central operation device Computer is formed.
In addition, the control controlled organic waste-water treating apparatus 1 is stored in the switch judgement part 9b of control unit 9 Program.The control program is made of the 1st step and second step.In the 1st step, send at predetermined time intervals to processing water The instruction that ammonia density, full nitrogen concentration and full phosphorus concentration are measured respectively.In second step, the ammonia density based on processing water, The measurement result of full nitrogen concentration and full phosphorus concentration is sent to anaerobism atmosphere, the micro- aerobic atmosphere and good in adjustment region 12 The instruction that the scope of oxygen atmosphere is adjusted.The action for controlling program is as described later.
The function that the 1st of program the, second step is possessed by the central operation device for for example forming control unit 9 is controlled to realize.
Then, the processing method of the organic wastewater to having used organic waste-water treating apparatus 1 shown in FIG. 1 illustrates.
Organic wastewater (raw water) is separated into solid state component and liquid parts in initial sedimentation basin 2.Liquid parts are to biology It is imported in reactive tank 3.By the effect of the activated sludge of the condensation product of being used as microorganism in the biological reaction tank 3, gone in decomposition While except organic matter, the removal of nitrogen, phosphorus is carried out based on principle as shown below.
First, the principle of nitrogen removal is illustrated.
Nitrogen containing component in organic wastewater it is more than half with ammonium ion (NH4 +) form exist.The nitrogen containing component is there are oxygen Under conditions of by the nitrifier present in activated sludge effect and nitrate nitrogen is oxidized to by the reaction of (1) formula (NO3 -).The reaction mainly carries out in Aerobic Process for Treatment region 13.
There are the conditions (aerobic condition) of oxygen
NH4 ++2O2→NO3 -+H2O+2H+…(1)
The nitrate nitrogen in the absence of oxygen due to denitrifier effect and pass through the reaction of (2) formula and be reduced into nitrogen. The reaction mainly carries out in Anaerobic Treatment region 11.(2) (H) of formula is provided from the organic matter (hydrogen donor) in dirty water, Therefore, in order to promote the reaction, it is necessary to organic matter.Organic matter can be the organic matter in organic wastewater, can also be by ethyl alcohol, carboxylic Acid etc. is supplied to Anaerobic Treatment region 11.
The condition (anaerobic condition) of anaerobic
2NO3 -+10H→N2+2OH-+4H2O…(2)
As described above, in aerobic atmosphere, the reaction of (1) formula is substantially carried out.In addition, in anaerobism atmosphere, it is substantially carried out (2) reaction of formula.Moreover, in micro- aerobic atmosphere, the reaction of (1) formula and (2) formula is carried out at the same time.
Here, in the case where the carry out of the slave ammonia to the reaction of nitrate ion of (1) formula is insufficient, without (2) formula Reaction, handle water in full nitrogen concentration can not reduce.Thus, the high situation of ammonia density and full nitrogen concentration in water is handled Down, it is necessary to promote (1) formula, it is necessary to increase aerobic atmosphere.
On the other hand, fully carried out even if the reaction of (1) formula, also without the reaction of (2) formula in the case of, handle water In full nitrogen concentration can not reduce.Thus, although, it is necessary to promote in the case of the low full nitrogen concentration height of the ammonia density in handling water Into (2) formula, therefore, it is necessary to increase micro- aerobic atmosphere.
Then, the principle of phosphorus ligands is shown.
Phosphorus is removed by the effect of the polyP bacteria present in activated sludge.PolyP bacteria will be accumulated in anaerobism atmosphere Endobacillary phosphorus release.On the other hand, in aerobic atmosphere, in anaerobism atmosphere from the above phosphorus that thalline releases into Row absorbs.The phosphorus for being equivalent to the residual quantity of burst size and uptake is removed from water.Accumulation has the polyP bacteria of phosphorus most in vivo It is dug out in whole sedimentation basin 4 as excess sludge, so as to be removed.In addition, the volume of anaerobism atmosphere is bigger, polyP bacteria is to phosphorus Removal situation about carrying out more in a effective manner it is more.In addition, in the case where that can promote to nitrify micro- aerobic condition of denitrification reaction, do not draw Play release of the polyP bacteria to phosphorus.
The principle of removal based on above nitrogen, phosphorus illustrates this together with the action with the control program performed by control unit 9 The processing method of the organic wastewater of embodiment.
First, it is micro- good to be configured to as both original states, the 1st region 12a, the 2nd region 12b of adjustment region 12 Oxygen atmosphere.
Organic wastewater solid state component in initial sedimentation basin 2 by sedimentation separation, is flowed into upper strata clear water a considerable amount afterwards Biological reaction tank 3.The organic wastewater of inflow is via Anaerobic Treatment region 11, adjustment region 12 and Aerobic Process for Treatment region 13 from life Object reactive tank 3 flows out.In addition, in Aerobic Process for Treatment region 13, handle water ammonia density and dissolved oxygen amount by ammonia concentration determination device 5 And DO determination device 6 measures, measurement result is exported to switch judgement part 9b and blast volume controller 30.Based on air quantity control The air output of the instruction control air blower 21 of device 30 processed.On the air output of air blower, by Japanese Unexamined Patent Publication 2005- Such method disclosed in No. 199116 publications, Japanese Unexamined Patent Publication 2007-249767 publications and according to ammonia density and dissolved oxygen amount and It adjusts volume damper 24 and aeration air quantity is controlled.
The processing water flowed out from biological reaction tank 3 flows into final sedimentation tank 4 together with activated sludge.In final sedimentation tank Make activated sludge sedimentation separation in 4.Afterwards, only processing water is discharged into environment.The processing water discharged from final sedimentation tank 4 Full nitrogen concentration and full phosphorus concentration are measured respectively by analyzer 7,8.The measurement result of analyzer 7,8 is sentenced to the switching of control unit 9 Determine portion 9b outputs.In addition, a part for the activated sludge that sedimentation separation goes out in final sedimentation tank 4 is as sending sludge back to via sending It returns piping 40 and returns to Anaerobic Treatment region 11.In addition, the remainder of activated sludge is dehydrated, burns and landfill disposal.
In the Anaerobic Treatment region 11 of biological reaction tank 3, using the microorganism in Anaerobic Treatment region by organic wastewater In dirty substance decompose and form Anaerobic Treatment water.Then, in adjustment region 12, by Anaerobic Treatment under micro- aerobic atmosphere Dirty substance in water decomposes and forms intermediate treatment water.Then, in Aerobic Process for Treatment region 13, aerobic processing region 13 is utilized Dirty substance in intermediate treatment water is decomposed and forms processing water by interior microorganism.In addition, from set by Aerobic Process for Treatment region 13 The cohesion agent feeding device 50 put continuously adds the flocculating agents such as polyaluminium chloride, aluminum sulfate, ferric sulfate, makes to swim in processing water Flocculate cohesion.In addition, the addition of flocculating agent also has the effect for the chemistry removal for promoting phosphorus, therefore, as described later, exist The situation that the quantity delivered of flocculating agent changes is made by the full phosphorus concentration handled in water.
In Anaerobic Treatment region 11, phosphorus is discharged from polyP bacteria.In addition, in Anaerobic Treatment region 11, also carry out from nitre Acid ion is to the reduction reaction of nitrogen.Nitrate ion is generated in Aerobic Process for Treatment region 13 due to the oxidation reaction of ammonia, with It sends sludge back to and returns to Anaerobic Treatment region 11 from final sedimentation tank 4 via piping 40 is sent back to together.In addition, be adjusted to it is micro- good In the adjustment region 12 of oxygen atmosphere, the oxidation reaction of ammonia and the reduction reaction of nitrate ion that are carried out at the same time in processing water.And And in Aerobic Process for Treatment region 13, the oxidation reaction of the ammonia in processing water is carried out.
Here, the step 1 as control program, predetermined target is exported from desired value setting apparatus 9a to switch judgement part 9b Value.Desired value contains upper limit value (the hereinafter referred to as desired value of the ammonia density in the processing water in Aerobic Process for Treatment region 13NH3), stream Go out upper limit value (the hereinafter referred to as desired value of the full nitrogen concentration to the processing water of final sedimentation tank 4T-N) and full phosphorus concentration the upper limit It is worth (hereinafter referred to as desired valueP)。
Desired valueNH3It is to be judged as needing to increase in the case of the ammonia density in for example handling water and full nitrogen concentration height Aerobic atmosphere with promote in the case of (1) formula processing water in ammonia density the upper limit.
In addition, desired valueT-NThe discharge desired value of the full nitrogen concentration e.g. independently set.Moreover, desired valuePExample The discharge desired value of the full phosphorus concentration independently set in this way.
In addition, for preventing selected objective target value from the perspective of public hazards, environmental protectionT-NAnd desired valuePIt is set to than this The low value of a little discharge limits values.Full nitrogen, the discharge limits value of full phosphorus use the discharge benchmark defined of for example legal waste water Value.
Then, the step 2 as control program, at predetermined time intervals, from ammonia concentration determination device 5, full nitrogen concentration analyzer 7 And full ammonia density, full nitrogen concentration, full phosphorus of the phosphorus concentration analyzer 8 into the switch judgement part 9b input processing water of control unit 9 Concentration.Then, in switch judgement part 9b, adjustment region is determined based on ammonia density, full nitrogen concentration, the full phosphorus concentration in processing water The species and scope of atmosphere in 12.Based on content is determined, the aeration of determination unit 9b to the atmosphere of control adjustment region 12 fills It puts 20 and sends instruction.In addition, determination unit 9b can also send instruction to cohesion agent feeding device 50.
The implementation frequency of step 2 is set in 10 minutes~60 minutes 1 time or so, so as to the atmosphere in adjustment region 12 Switching is not excessively frequent.Calculating frequency can be by settings such as monitoring terminal.
Hereinafter, with reference to table 1, point situation illustrates the action of switch judgement part 9.
[table 1]
(example 1)
As shown in table 1, it is more than desired value in full nitrogen concentrationT-NAnd ammonia density is more than desired valueNH3In the case of, increase and adjust The scope of aerobic atmosphere in main plot domain 12.In this example, ammonia density is more than desired valueNH3, therefore, by increasing aerobic gas The scope of atmosphere promotes the oxidation reaction from ammonia to nitrate ion.For example entire adjustment region 12 becomes in the initial state In the case of micro- aerobic atmosphere, in order to which the atmosphere for making the 2nd region 12b becomes aerobic atmosphere from micro- aerobic atmosphere, make open and close valve 25c Aperture be standard-sized sheet.Moreover, in the case where increasing aerobic atmosphere, in order to make the atmosphere of the 1st region 12a from micro- aerobic atmosphere into Preferably oxygen atmosphere, the aperture for making open and close valve 25b are standard-sized sheet.In the case where increasing the scope of aerobic atmosphere, from from aerobic The one side in reason region 13 switches over successively.In the case where entire adjustment region 12 has become aerobic atmosphere, maintain it former The state of sample.In addition, it has been more than desired value for full nitrogen concentrationT-NSituation, for example, by temporarily making organic wastewater to life The influx of object reactive tank 3 reduces or stops tackling.Or can also be, in order to promote going back from nitrate ion to nitrogen Original reaction, to processing water supply ethyl alcohol, carboxylic acid etc. as the hydrogen source in above-mentioned formula (2).
(example 2)
As shown in table 1, it is more than desired value in full nitrogen concentrationT-N, ammonia density be equal to desired valueNH3In the case of, area will be adjusted The scope of each atmosphere in domain 12 remains unchanged.The reason for this is that ammonia density is equal to desired valueNH3, therefore, the oxidation reaction of ammonia It is sufficient, from the perspective of the steadily resolution process of progress dirty substance, and the scope of atmosphere need not be changed.This Outside, it has been more than desired value for full nitrogen concentrationT-NSituation, with example 1 likewise by for example temporarily making organic wastewater to life The influx of object reactive tank 3 reduces or stops tackling.Or can also be, in order to promote going back from nitrate ion to nitrogen Original reaction, to processing water supply ethyl alcohol, carboxylic acid etc. as the hydrogen source in above-mentioned formula (2).
(example 3)
As shown in table 1, it is more than desired value in full nitrogen concentrationT-N, ammonia density be less than desired valueNH3In the case of, increase adjustment The scope of micro- aerobic atmosphere in region 12.In example 3, ammonia density is less than desired valueNH3, therefore, carry out the oxidation reaction of ammonia Atmosphere substantially ensured that and full nitrogen concentration has been more than desired valueT-N, therefore, by increasing the scope of micro- aerobic atmosphere, promote The reduction reaction of nitrate ion.
Under above-mentioned original state, entire adjustment region 12 is micro- aerobic atmosphere, therefore, is further increased without leeway Micro- aerobic atmosphere.However, for example, it is anaerobism atmosphere in both the 1st region 12a of adjustment region 12 and the 2nd region 12b In the case of, first, in order to which the 2nd region 12b that will be close to the one side in Aerobic Process for Treatment region 13 is set to micro- aerobic atmosphere, adjustment opening and closing The aperture of valve 25c.Moreover, if desired increasing micro- aerobic atmosphere, then adjusted in order to which the 1st region 12a is set to micro- aerobic atmosphere The aperture of open and close valve 25b.
In addition, in the case of both the 1st region 12a and the 2nd region 12b preferably oxygen atmosphere, first, in order to lean on 1st region 12a of the one side in nearly Anaerobic Treatment region 11 is set to micro- aerobic atmosphere and adjusts the aperture of open and close valve 25b.If moreover, It needs to increase micro- aerobic atmosphere, then adjusts the aperture of open and close valve 25c in order to which the 2nd region 12b is set to micro- aerobic atmosphere.
Moreover, it is in the case that anaerobic state, the 2nd region 12b are aerobic atmosphere, in order to will be close to detest in the 1st region 12a 1st region 12a of the one side of oxygen processing region 11 is set to micro- aerobic atmosphere and adjusts the aperture of open and close valve 25b.Moreover, if desired Increase micro- aerobic atmosphere, then adjust the aperture of open and close valve 25c in order to which the 2nd region 12b is set to micro- aerobic atmosphere.
In the case where entire adjustment region 12 has become micro- aerobic atmosphere, its original sample state is maintained.In addition, for complete Nitrogen concentration has been more than desired valueT-NSituation, such as by temporarily make influx from organic wastewater to biological reaction tank 3 reduce Or stop tackling.Or can also be, in order to promote the reduction reaction from nitrate ion to nitrogen, to processing water supply second Alcohol, carboxylic acid etc. are as the hydrogen source in above-mentioned formula (2).
In this way, in the case where increasing the scope of micro- aerobic atmosphere, existing can be from close to the one side in Aerobic Process for Treatment region 13 Situation about switching over and situation about can be switched over from the one side in close Anaerobic Treatment region 11.
(example 4)
As shown in table 1, it is more than desired value in full nitrogen concentrationT-N, full phosphorus concentration be more than desired valuePIn the case of, increase comes from Agglomerate the quantity delivered of the flocculating agent of agent feeding device 50.I.e., in order to reduce full phosphorus concentration, using than usually more addition is agglomerated Agent and the method for chemical treatment that phosphorus is made to be agglomerated together with sludge.For the reduction of full nitrogen concentration, such as by temporarily making organic waste Water reduces to the influx of biological reaction tank 3 or stops tackling.This is also effective to the reduction of full phosphorus concentration.In addition, Can be, in order to reduce full nitrogen concentration, in order to promote the reduction reaction from nitrate ion to nitrogen, to processing water supply ethyl alcohol, Carboxylic acid etc. is as the hydrogen source in above-mentioned formula (2).
(example 5)
As shown in table 1, it is more than desired value in full nitrogen concentrationT-N, full phosphorus concentration be equal to desired valuePIn the case of, maintain it former Sample state.In addition, it has been more than desired value for full nitrogen concentrationT-NSituation, such as by temporarily making organic wastewater to biological anti- The influx of slot 3 is answered to reduce or stop tackling.Alternatively, in order to promote the reduction reaction from nitrate ion to nitrogen, to processing Water supply ethyl alcohol, carboxylic acid etc. are as the hydrogen source in above-mentioned formula (2).
(example 6)
As shown in table 1, it is more than desired value in full nitrogen concentrationT-N, full phosphorus concentration be less than desired valuePIn the case of, phosphorus is abundant Ground removes, and therefore, reduces the quantity delivered of the flocculating agent from cohesion agent feeding device 50.For the reduction of full nitrogen concentration, such as By the way that organic wastewater is temporarily made to be reduced to the influx of biological reaction tank 3 or stops tackling.This is also to the drop of full phosphorus concentration Low is effective.Alternatively, it is also possible to be, in order to reduce full nitrogen concentration, in order to promote the reduction reaction from nitrate ion to nitrogen, To processing water supply ethyl alcohol, carboxylic acid etc. as the hydrogen source in above-mentioned formula (2).
(example 7)
It is desired value in full nitrogen concentrationT-NBelow, phosphorus concentration is more than desired valuePIn the case of, increase in adjustment region 12 The scope of anaerobism atmosphere.Full nitrogen concentration is less than desired valueT-N, therefore, the removal technique for nitrogen is that smoothly, phosphorus concentration is more than Desired valueP, therefore, it is necessary to improve the removal technique of phosphorus.Therefore, by increasing the scope of anaerobism atmosphere, make phosphorus from thalline Release it is prevailing, make good use of the uptake of the thalline increase phosphorus in oxygen atmosphere, improve the removal rate of phosphorus.
Specifically, in the case where for example entire adjustment region 12 becomes micro- aerobic atmosphere in the initial state, in order to Make the atmosphere of the 1st region 12a become anaerobism atmosphere from micro- aerobic atmosphere, the aperture of open and close valve 25b is set to fully closed.Next, In the case where further increasing anaerobism atmosphere, in order to which the atmosphere for making the 2nd region 12b becomes anaerobism atmosphere from micro- aerobic atmosphere, The aperture of open and close valve 25c is set to fully closed.In this way, in the case where increasing the scope of anaerobism atmosphere, from close to Anaerobic Treatment area The one side in domain 11 switches over successively.In the case where entire adjustment region 12 has become anaerobism atmosphere, its original sample shape is maintained State.
In this way, in the case where increasing the scope of anaerobism atmosphere, carried out successively from the one side close to Anaerobic Treatment region 11 Switching is preferred.
(example 8)
It is desired value in full nitrogen concentrationT-NBelow, phosphorus concentration is desired valuePIt, will be in adjustment region 12 in the case of below The scope of each atmosphere remains unchanged.The removal of nitrogen and phosphorus is successfully carried out, and therefore, and need not change the scope of atmosphere.
Organic waste-water treating apparatus 1 is operated according to above-mentioned any example, afterwards, is again carried out walking at predetermined time intervals Rapid 2, the scope of the atmosphere in adjustment region 12 is changed.
As described above, using present embodiment organic wastewater processing unit and processing method, to having Anaerobic Treatment region 11, adjustment region 12 and Aerobic Process for Treatment region 13 are set in the biological reaction tank 3 that machine waste water is handled On the basis of, pass through the species and scope according to the full nitrogen concentration and ammonia density for handling water to the atmosphere in adjustment region 12 It is adjusted, the removal of nitrogen and phosphorus can be carried out at the same time.
Full nitrogen concentration in processing water is high and ammonia it is dense it is higher in the case of, increase to promote the nitration reaction of ammonia Oxygen atmosphere, so as to improve the removal rate of nitrogen.
In addition, in the case where the full nitrogen concentration height and ammonia density of processing water are low, in order to promote the reduction of nitrate ion Reaction, by increasing micro- aerobic atmosphere, can improve the removal rate of nitrogen.
Moreover, processing water full nitrogen concentration is low and phosphorus concentration height in the case of, in order to promote phosphorus from the release of thalline Thalline is made to absorb more phosphorus, by increasing anaerobism atmosphere, the removal rate of phosphorus can be improved.
In addition, also by setting ammonia concentration determination device 5 on biological reaction tank 3, it can not only be by 5 profit of ammonia concentration determination device For being switched and determined, additionally it is possible to ammonia concentration determination device 5 be used in the control of aeration air quantity, due to the reduction effect of aeration air quantity Fruit, it is possible to realize energy saving.
In addition, on phosphorus, can also be removed by adding flocculating agent and chemistry, therefore, the value regardless of phosphorus, pass through Atmosphere based on full nitrogen concentration and ammonia density control adjustment region 12 can improve the removal rate of nitrogen.
Moreover, in the facility of the conventional actived sludge of existing comprehensive aeration mode, only pass through opening a part Valve closing 25b, 26b is set to the open and close valve of aperture type variable, and the additional various sensors of setting, it becomes possible to construct present embodiment Therefore processing method and processing unit, existing equipment are minimally transformed, it becomes possible to while go to denitrogenate phosphorus.
In addition, in the present embodiment, following change can also be applied.
In the case where at least a portion of adjustment region 12 is set to anaerobism atmosphere or, in Anaerobic Treatment region In 11, such as open and close valve 25a~25c is set to or so "ON" a few minutes when 1 is small and promotes to stir.
As long as the installation position of ammonia concentration determination device 5, full nitrogen concentration analyzer 7 and full phosphorus concentration analyzer 8 is than biology The back segment portion for the treatment of trough 3 rearward, can also just be arranged at 4 grade any positions of final sedimentation tank.
In addition, adjustment region 12 is divided into two regions in Fig. 1, but either 1 region or 3 with On region.
Moreover, full phosphorus concentration analyzer 8 can also be the phosphoric acid meter for the phosphorus (PO4-P) for measuring phosphoric acid.
(the 2nd embodiment)
The organic waste-water treating apparatus 51 of present embodiment is shown in Fig. 2.For being filled with treatment of Organic Wastewater shown in FIG. 1 Put 1 identical inscape, mark identical reference numeral and the part that the description thereof will be omitted.
Anaerobic Treatment region 11, adjustment are provided in the biological reaction tank 3 of organic waste-water treating apparatus 51 shown in Fig. 2 Region 12 and Aerobic Process for Treatment region 13.Adjustment region 12 is arranged between Anaerobic Treatment region 11 and aerobic processing region 13.
In addition, aerator 60 is provided with as aeration devices in biological reaction tank 3.Aerator 60 includes air blower 21st, the air line 22 that extends from air blower 21, arranged on the flow rate regulating valve 23 of air line 22, from 22 branch of air line The branched pipe 24 that goes out, arranged on each branched pipe 24 open and close valve 65a~65b and be installed on each branched pipe 24 top air Diffuser plate 66a~66b.Air diffuser plate 66a~66b is arranged in the Aerobic Process for Treatment region 13 of biological reaction tank 3.In addition, it sets "ON" is set to always in open and close valve 65a~65b of each branched pipe 24.
In addition, catheter type aerator 71,72 is provided in the adjustment region 12 of biological reaction tank 3 as aeration devices. Stirring wing 71a, 71b that catheter type aerator 71,72 includes the air supply unit of illustration omitted and can rotate.By adjusting stirring The rotary speed of the wing 71a, 71b are mixed, the atmosphere in adjustment region 12 can be set to anaerobism atmosphere, micro- aerobic atmosphere and aerobic 1 kind or two or more in atmosphere.
Wantonly a kind or two in atmosphere can be switched to anaerobism atmosphere by adjustment region 12, micro- aerobic atmosphere is become reconciled oxygen atmosphere Kind or more.In addition, adjustment region 12 can adjust the model shared by anaerobism atmosphere, micro- aerobic atmosphere and each atmosphere of aerobic atmosphere It encloses.In example shown in Fig. 2, adjustment region 12 is divided into the 1st region 12a and the 2nd the two regions of region 12b.1st region 12a is the corresponding region in setting position with catheter type aerator 71, and the 2nd region 12b is set with catheter type aerator 72 Put the corresponding region in position.In the 1st, the 2nd region 12a, 12b, it is able to independently switch atmosphere.
The switching of atmosphere in adjustment region 12 carries out by adjusting the rotary speed of catheter type aerator 71,72.It leads Tube aerator 71 is controlled by the instruction of control unit 9.If make catheter type aerator 71,72 low speed rotations, as anaerobism atmosphere. If catheter type aerator 71,72 is made to rotate at a high speed, as aerobic atmosphere.If making catheter type aerator 71, the rotation of 72 middling speeds, As micro- aerobic atmosphere.The setting of the rotary speed of catheter type aerator 71,72 is on the basis of the ORP value for handling water according to each gas Atmosphere is set.
In addition, in order to adjust the scope shared by each atmosphere, by independently controlling be arranged in adjustment region 12 two The rotating speed of a catheter type aerator 71,72 carries out.Such as make both catheter type aerator 71,72 low speed rotations In the case of, entire adjustment region 12 becomes anaerobism atmosphere.In addition, make 71 low speed rotation of catheter type aerator, making catheter type In the case that 72 middling speed of aerator has rotated, the 1st region 12a becomes anaerobism atmosphere, and the 2nd region 12b becomes micro- aerobic atmosphere.Separately Outside, make 71 middling speed of catheter type aerator rotation, have rotated 72 high speed of catheter type aerator in the case of, the 1st region 12a into For micro- aerobic atmosphere, the 2nd region 12b becomes aerobic atmosphere.Moreover, both catheter type aerators 71,72 is made to rotate at a high speed In the case of, entire adjustment region 12 becomes aerobic atmosphere.In the example depicted in figure 1, by being set in adjustment region 12 Put two catheter type aerators 71,72, adjustment region 12 be further divided into two regions (the 1st, the 2nd region), but by into One step sets more catheter type aerators, and adjustment region 12 is divided into more regions, can be for greater flexibility to adjustment region Atmosphere in 12 is adjusted.
In addition, being provided with agitating device 73 in the Anaerobic Treatment region 11 of biological reaction tank 3, such as make when 1 is small Or so agitating device stirring a few minutes, so as to promote Anaerobic Treatment.
Hereinafter, the processing method for the organic wastewater that organic waste-water treating apparatus 51 as shown in Figure 2 carries out is illustrated.In addition, In the present embodiment, also in a same manner as in the first embodiment organic waste-water treating apparatus 51 by control programme-control.Following place The explanation of reason method is illustrated centered on the point different from the 1st embodiment.
First, it is micro- good to be configured to as both original states, the 1st region 12a, the 2nd region 12b of adjustment region 12 Oxygen atmosphere.Both catheter type aerators 71,72 are rotated according to the equal middling speed of instruction of control unit 9.Hereinafter, above-mentioned table 1 is illustrated The action of each example.
(example 1)
In the case of the example 1 for implementing table 1 in the present embodiment, i.e., aerobic atmosphere, in adjustment region 12 is increased Scope in the case of, catheter type aerator 71,72 is made to act as follows.Entire adjustment region 12 becomes in the initial state In the case of micro- aerobic atmosphere, in order to which the atmosphere for making the 2nd region 12b becomes aerobic atmosphere from micro- aerobic atmosphere, make catheter type Aerator 72 rotates at a high speed.In the case where further increasing aerobic atmosphere, in order to make the atmosphere of the 1st region 12a from micro- aerobic Atmosphere becomes aerobic atmosphere, and catheter type aerator 71 is made to rotate at a high speed.In the case where increasing the scope of aerobic atmosphere, from close The one side in Aerobic Process for Treatment region 13 switches over successively.In the case where entire adjustment region 12 has become aerobic atmosphere, dimension Hold its original sample state.
(example 2)
In the case of the example 2 for implementing table 1 in the present embodiment, i.e., by the model of each atmosphere in adjustment region 12 It encloses in the case of remaining unchanged, the operating condition of catheter type aerator 71,72 is made to maintain original sample.
(example 3)
In the case of the example 3 for implementing table 1 in the present embodiment, i.e., micro- aerobic gas, in adjustment region 12 is increased In the case of the scope of atmosphere, as described below.
Under above-mentioned original state, entire adjustment region 12 is micro- aerobic atmosphere, therefore, is further increased without leeway Micro- aerobic atmosphere.However, it is anaerobism atmosphere for example in both the 1st region 12a of adjustment region 12 and the 2nd region 12b In the case of, first, in order to which the 2nd region 12b that will be close to the one side in Aerobic Process for Treatment region 13 is set to micro- aerobic atmosphere, make catheter type The rotary speed of aerator 72 is rotated from low speed rotation as middling speed.Moreover, if desired increase micro- aerobic atmosphere, then in order to by 1 region 12a is set to micro- aerobic atmosphere and the rotary speed of catheter type aerator 71 is made to be rotated from low speed rotation as middling speed.
In addition, in the case where both the 1st region 12a and the 2nd region 12b are aerobic atmosphere, first, in order to lean on 1st region 12a of the one side in nearly Anaerobic Treatment region 11 is set to micro- aerobic atmosphere, make the rotary speed of catheter type aerator 71 from Rotation becomes middling speed and rotates at a high speed.Moreover, if desired increase micro- aerobic atmosphere, then in order to the 2nd region 12b is set to micro- aerobic gas Atmosphere and the rotary speed of catheter type aerator 72 is made to become middling speed from high speed rotation and is rotated.
Moreover, it is in the case that anaerobic state, the 2nd region 12b are aerobic atmosphere, in order to will be close to detest in the 1st region 12a 1st region 12a of the one side of oxygen processing region 11 is set to micro- aerobic atmosphere, makes the rotary speed of catheter type aerator 71 from low speed Rotation becomes middling speed and rotates.Moreover, if desired increase micro- aerobic atmosphere, then in order to which the 2nd region 12b is set to micro- aerobic atmosphere, The rotary speed of catheter type aerator 72 is made to become middling speed from high speed rotation to rotate.
In the case where entire adjustment region 12 has become micro- aerobic atmosphere, its original sample state is maintained.
(example 4,5,6)
In the case of the example 4,5,6 for implementing table 1 in the present embodiment, in a same manner as in the first embodiment.
(example 7)
In the case of the example 7 for implementing table 1 in the present embodiment, i.e., anaerobism atmosphere, in adjustment region 12 is increased Scope in the case of, as described below.
In the case that entire adjustment region 12 becomes micro- aerobic atmosphere in the initial state, in order to make the 1st region 12a's Atmosphere becomes anaerobism atmosphere from micro- aerobic atmosphere, and the rotary speed of catheter type aerator 71 is made to be rotated into from middling speed and is revolved for low speed Turn.In the case where further increasing anaerobism atmosphere, in order to which the atmosphere for making the 2nd region 12b becomes anaerobic gas from micro- aerobic atmosphere Atmosphere makes the rotary speed of catheter type aerator 72 be rotated into from middling speed as low speed rotation.Have become in entire adjustment region 12 In the case of anaerobism atmosphere, its original sample state is maintained.
(example 8)
In the case of the example 8 for implementing table 1 in the present embodiment, in a same manner as in the first embodiment.
Also, operate organic waste-water treating apparatus 51 according to above-mentioned arbitrary example, afterwards, at predetermined time intervals, then Secondary implementation steps 2, the scope of the atmosphere in change and adjustment region 12.
Using the processing unit 51 and processing method of the organic wastewater of present embodiment, can obtain and the 1st embodiment While same effect, following effect can be also obtained.
In the present embodiment, agitating device 73 is provided in Anaerobic Treatment region 11, can be stirred, therefore, The reaction under the conditions of anaerobism atmosphere is easily carried out, the removal of nitrogen, phosphorus can be promoted.
In addition, therefore, processing is readily available using catheter type aerator 71,72 stir process water in adjustment region 12 The water correction effect of water, can more promote the removal of nitrogen, phosphorus.
In addition, in the present embodiment, as shown in Fig. 2, adjustment region 12 is divided into two regions, but either 1 A region or more than 3 region.
(the 3rd embodiment)
The organic waste-water treating apparatus 81 of present embodiment is shown in Fig. 3.For being filled with treatment of Organic Wastewater shown in FIG. 1 It puts 1 identical inscape and marks identical reference numeral and the part that the description thereof will be omitted.
Organic waste-water treating apparatus 81 shown in Fig. 3 and the organic waste-water treating apparatus 1 of the 1st embodiment shown in FIG. 1 Difference be, be respectively arranged in the 1st region 12a of adjustment region 12 and the 2nd region 12b ORP meter (redox Potentiometer) 82,83.In the present embodiment, when controlling the atmosphere in adjustment region 12, based on by ORP meter 82, The oxidation-reduction potentials of the 83 processing water determined adjusts the aperture of open and close valve 25b, 25c.I.e., control unit 9 is counted based on ORP 82nd, 83 measurement result is finely adjusted the aperture of open and close valve 25b, 25c of aeration devices 20, to maintain in adjustment region 12 Each atmosphere state.Or based on ORP count 82,83 measurement result in adjustment region 12 anaerobism atmosphere, micro- aerobic gas The scope of atmosphere or aerobic atmosphere is adjusted.
For example, for the open and close valve 25b in the case where at least a portion of adjustment region 12 to be set to micro- aerobic atmosphere Or the aperture of 25c, aperture is automatically adjusted, so that the ORP value that ORP counts 82,83 is between -50~50mV.Open and close valve ORP value of the aperture of 25b based on ORP meters 82 is adjusted.ORP value of the aperture of open and close valve 25c based on ORP meters 83 is adjusted It is whole.In addition, ORP count 82 or 83 ORP value change and less than in the case of -50mV, by the aperture of open and close valve 25b or 25c to Evolution is to adjustment.82 or 83 ORP value is counted in ORP to change into the case of more than 50mV, by open and close valve 25b or 25c aperture to Direction adjustment is closed, maintains the state of atmosphere.
The adjusting method of the aperture of open and close valve 25b or 25c is in the scope of -50~50mV in the ORP value of ORP meters 82,83 Outside in the case of, either for example make 1 percent 1 percent ground of aperture increase and decrease method, can also flexibly use PI General feedback controling mode as controlling (proportional plus integral control), PID control (PID control parameter).It is also contemplated for ORP counts for 82,83 response time, it may be desirable to which the cycle for increasing and decreasing aperture is set to 1 minute~dozens of minutes or so.
More than, the situation of micro- aerobic atmosphere is illustrated, the situation of anaerobism atmosphere and aerobic atmosphere is similarly Adjustment.
Using present embodiment, can effectively control the atmosphere of adjustment region 12, therefore, it is possible to improve nitrogen and phosphorus from The removal of organic wastewater.Especially, present embodiment is used, even being difficult to adjust maintenance compared with anaerobism atmosphere, aerobic gas Micro- aerobic atmosphere, also can effectively form micro- aerobic atmosphere, therefore, be particular enable to improve nitrogen removal rate.
In addition, certainly, the control of ORP meters can also be applied to the control of the catheter type aerator in the 2nd embodiment.
(the 4th embodiment)
The organic waste-water treating apparatus 91 of present embodiment is shown in Fig. 4.For being filled with treatment of Organic Wastewater shown in Fig. 2 It puts 51 identical inscapes and marks identical reference numeral and the part that the description thereof will be omitted.
Organic waste-water treating apparatus 91 shown in Fig. 4 and the organic waste-water treating apparatus 51 of the 2nd embodiment shown in Fig. 2 Difference be, be provided with to make the part of processing water from the Aerobic Process for Treatment region 13 of biological reaction tank 3 towards adjustment The pipeloop 92 for entering side Xun Huan in region 12.The pipeloop 92 includes processing water and sends piping 93 and circulating pump 94 back to.
It is more than target that control unit 9 in present embodiment becomes aerobic atmosphere and nitrogen concentration in entire adjustment region 12 ValueT-N, ammonia density be less than desired valueNH3In the case of, make processing water from Aerobic Process for Treatment region 13 to adjustment using pipeloop 92 Region 12 enters side Xun Huan.Make part or all of adjustment region 12 while the cycling for handling water as anaerobism atmosphere.
Although all it is less than desired value as micro- aerobic atmosphere, ammonia density in adjustment region 12NH3But full nitrogen concentration is more than mesh Scale valueT-NState be able to continue in the case of, make circulating pump 94 start implement handle water cycling.Internal circulating load be set to The amount that the scope more than 0% and less than 200% of the influx in Aerobic Process for Treatment region 13 is adjusted, e.g. according to following (3) formula makes internal circulating load increase and decrease until nitrogen concentration is less than desired valueT-NAmount.
Qcirc=Kp (TN-TNref) ... (3)
In formula (3), Qcirc be circular flow (m3/h), Kp is proportionality constant, and TN is the full nitrogen concentration for handling water, TNref is desired valueT-N。
If nitrogen concentration is less than desired valueT-N, then stop circulating pump 94, operated based on the determinating reference shown in table 1.Separately Outside, in the operation process of circulating pump 94, the rotary speed of catheter type aerator 71,72 is adjusted, so that adjustment region The ORP value of 12 the 1st region 12a and the 2nd region 12b are in the range of -150~0mV.
Reduction reaction being smoothed out from ammonia to the oxidation reaction of nitrate ion but from from nitrate ion to nitrogen is not filled In the case of point, by the way that processing water is made to be cycled from micro- aerobic atmosphere to the adjustment region 12 of the intermediate degree in anaerobism atmosphere, The efficiency of the reduction reaction from nitrate ion to nitrogen is improved, the removal rate of nitrogen can be improved.
In addition, on internal circulating load, however it is not limited to (3) formula, as long as the measured value in full nitrogen concentration analyzer 7 is higher than target ValueT-NIn the case of increase internal circulating load, full nitrogen concentration analyzer 7 measured value be less than desired valueT-NSituation reduce cycle Amount, can also be just any means.
In addition, pipeloop 92 can also be applied to the organic waste-water treating apparatus 1 of the 1st embodiment.
Using at least one embodiment being illustrated above, biological reaction tank has Anaerobic Treatment region, adjustment Region and Aerobic Process for Treatment region, adjustment region can switch to anaerobism atmosphere using control unit, micro- aerobic atmosphere is become reconciled oxygen 1 kind or two or more of atmosphere in atmosphere, therefore, it is possible to remove nitrogen and phosphorus in organic wastewater simultaneously, and can easily to Existing equipment imports.
Several embodiments of the invention is illustrated, but these embodiments propose as an example, it is intended that And the scope for limiting invention is not lain in.These embodiments can be implemented in various other forms, and not depart from the purport of invention In the range of can carry out it is various omit, displacement, change.Scope, the purport of these embodiments, its deformation with being contained in invention Similarly it is contained in invention and its equal scope recorded in claims.

Claims (9)

1. a kind of organic waste-water treating apparatus, which is characterized in that
The organic waste-water treating apparatus possesses：
Biological reaction tank, with Anaerobic Treatment region, adjustment region and Aerobic Process for Treatment region, which allows hand over 1 kind or two or more of atmosphere in becoming reconciled oxygen atmosphere into anaerobism atmosphere, micro- aerobic atmosphere, and the scope of atmosphere can be adjusted, The adjustment region is between the Anaerobic Treatment region and the Aerobic Process for Treatment region；
Ammonia concentration determination device is measured the ammonia density of the processing water in the Aerobic Process for Treatment region；
Full nitrogen concentration analyzer, the full nitrogen concentration of the processing water to being flowed out from the biological reaction tank are measured；
Full phosphorus concentration analyzer, the full phosphorus concentration of the processing water to being flowed out from the biological reaction tank are measured；
Control unit is based on by the ammonia concentration determination device, the full nitrogen concentration analyzer and the full phosphorus concentration analyzer The value determined is adjusted the scope of the atmosphere of the adjustment region,
The control unit at predetermined time intervals as follows controls the adjustment region：
It is more than predetermined desired value in the full nitrogen concentrationT-NAnd the ammonia density is more than predetermined desired valueNH3In the case of, Increase the scope of the aerobic atmosphere in the adjustment region；
It is more than the desired value in the full nitrogen concentrationT-NAnd the ammonia density is equal to the desired valueNH3In the case of, by institute The scope for stating each atmosphere in adjustment region remains unchanged；
It is more than the desired value in the full nitrogen concentrationT-NAnd the ammonia density is less than the desired valueNH3In the case of, increase The scope of micro- aerobic atmosphere in the adjustment region；
It is the desired value in the full nitrogen concentrationT-NBelow and the phosphorus concentration is more than predetermined desired valuePIn the case of, increase Add the scope of the anaerobism atmosphere in the adjustment region；
It is the desired value in the full nitrogen concentrationT-NBelow and the phosphorus concentration is the desired valuePIt, will in the case of below The scope of each atmosphere in the adjustment region remains unchanged,
The anaerobism atmosphere is the atmosphere for the scope that ORP value is in below -200mV, and micro- aerobic atmosphere is at ORP value In the atmosphere of the scope of -50~50mV, the aerobic atmosphere is the atmosphere for the scope that ORP value is in more than 50mV.
2. organic waste-water treating apparatus according to claim 1, wherein,
The control unit possesses：
Desired value setting apparatus, it is pre-set for the ammonia density, the full nitrogen concentration and the full phosphorus concentration storage Desired value；
Switch judgement part, with reference to the desired value, by the ammonia concentration determination device, full nitrogen concentration analyzer and full phosphorus concentration Each measured value that analyzer determines is adjusted the scope of the atmosphere of the adjustment region.
3. organic waste-water treating apparatus according to claim 1 or 2, wherein,
Be provided in the adjustment region can the instruction based on the control unit by the adjustment region atmosphere switch It is adjusted to anaerobism atmosphere, wantonly a kind or two or more of the aeration devices that micro- aerobic atmosphere is become reconciled in oxygen atmosphere.
4. organic waste-water treating apparatus according to claim 1 or 2, wherein,
Be provided in the adjustment region can the instruction based on the control unit by the adjustment region atmosphere switch It is adjusted to anaerobism atmosphere, wantonly a kind or two or more of the aeration devices that micro- aerobic atmosphere is become reconciled in oxygen atmosphere；
Oxidation-reduction potentiometer is provided in the adjustment region,
Measurement result of the control unit based on the oxidation-reduction potentiometer controls the aeration devices, to maintain the tune The state of each atmosphere in the domain of main plot.
5. organic waste-water treating apparatus according to claim 1 or 2, wherein,
Be provided in the adjustment region can the instruction based on the control unit by the adjustment region atmosphere switch It is adjusted to anaerobism atmosphere, wantonly a kind or two or more of the aeration devices that micro- aerobic atmosphere is become reconciled in oxygen atmosphere,
Oxidation-reduction potentiometer is provided in the adjustment region,
Measurement result of the control unit based on the oxidation-reduction potentiometer is to the anaerobism atmosphere, micro- good in the adjustment region The scope of oxygen atmosphere or aerobic atmosphere is adjusted.
6. organic waste-water treating apparatus according to claim 1 or 2, wherein,
Be provided in the adjustment region can the instruction based on the control unit by the adjustment region atmosphere switch It is adjusted to anaerobism atmosphere, wantonly a kind or two or more of the aeration devices that micro- aerobic atmosphere is become reconciled in oxygen atmosphere,
The organic waste-water treating apparatus be provided with a part for the processing water in the Aerobic Process for Treatment region can be sent back to it is described The pipeloop for entering side of adjustment region,
The control unit is more than all the target as aerobic atmosphere and the full nitrogen concentration the adjustment region ValueT-N, the ammonia density be less than the desired valueNH3In the case of, cycle the processing water using the pipeloop.
7. organic waste-water treating apparatus according to claim 1 or 2, wherein,
Be provided in the adjustment region can the instruction based on the control unit by the adjustment region atmosphere switch It is adjusted to anaerobism atmosphere, wantonly a kind or two or more of the aeration devices that micro- aerobic atmosphere is become reconciled in oxygen atmosphere,
The flocculating agent supply unit for the flocculating agent that supply agglomerates phosphorus is additionally provided in the Aerobic Process for Treatment region,
The control unit,
It is more than the desired value in the full nitrogen concentrationT-NAnd the phosphorus concentration is more than the desired valuePWhen make the flocculating agent The flocculating agent quantity delivered of supply unit increases；
It is more than the desired value in the full nitrogen concentrationT-NAnd the phosphorus concentration is equal to the desired valuePWhen make the flocculating agent The flocculating agent quantity delivered of throw-in part remains unchanged；
It is more than the desired value in the full nitrogen concentrationT-NAnd the phosphorus concentration is less than the desired valuePWhen make the flocculating agent The flocculating agent quantity delivered of throw-in part is reduced.
8. a kind of processing method of organic wastewater, which is characterized in that
Anaerobic Treatment region, the tune for the scope that can adjust atmosphere are set in the biological reaction tank handled organic wastewater Main plot domain and Aerobic Process for Treatment region,
It is handled as follows：
The organic wastewater is imported into the Anaerobic Treatment region, using the microorganism in the Anaerobic Treatment region by fouling product Matter decomposes and forms the Anaerobic Treatment of Anaerobic Treatment water；
The Anaerobic Treatment water is imported under the adjustment region, atmosphere after the adjustment, dirty substance is decomposed and is formed intermediate Handle the adjustment processing of water；
The intermediate treatment water is imported into the Aerobic Process for Treatment region, using the microorganism in the Aerobic Process for Treatment region by dirt Substance decomposition and formed processing water Aerobic Process for Treatment；
The processing being measured respectively to ammonia density, full nitrogen concentration and the full phosphorus concentration of the processing water at predetermined time intervals；
A part for the processing water is sent back to the processing in the Anaerobic Treatment region always,
While above-mentioned processing is carried out,
It is more than predetermined desired value in the full nitrogen concentrationT-NAnd the ammonia density is more than predetermined desired valueNH3In the case of, Increase the scope of the aerobic atmosphere in the adjustment region；
It is more than the desired value in the full nitrogen concentrationT-N, the ammonia density be equal to the desired valueNH3When, by the adjustment area The scope of each atmosphere in domain remains unchanged；
It is more than the desired value in the full nitrogen concentrationT-N, the ammonia density be less than the desired valueNH3When, increase the adjustment The scope of micro- aerobic atmosphere in region；
It is the desired value in the full nitrogen concentrationT-NBelow, the phosphorus concentration is more than predetermined desired valuePWhen, increase the tune The scope of anaerobism atmosphere in the domain of main plot；
It is the desired value in the full nitrogen concentrationT-NBelow, the phosphorus concentration is the desired valuePWhen following, by the adjustment The scope of each atmosphere in region remains unchanged,
The anaerobism atmosphere is the atmosphere for the scope that ORP value is in below -200mV, and micro- aerobic atmosphere is at ORP value In the atmosphere of the scope of -50~50mV, the aerobic atmosphere is the atmosphere for the scope that ORP value is in more than 50mV.
9. a kind of control program of organic waste-water treating apparatus is to use organic waste-water treating apparatus that it is handled as follows The control program on border,
The organic waste-water treating apparatus be provided in the biological reaction tank handled organic wastewater Anaerobic Treatment region, It can adjust the adjustment region of the scope of atmosphere and Aerobic Process for Treatment region forms,
The processing is as described below：
The organic wastewater is imported into the Anaerobic Treatment region, using the microorganism in the Anaerobic Treatment region by fouling product Matter decomposes and forms the Anaerobic Treatment of Anaerobic Treatment water；
The Anaerobic Treatment water is imported under the adjustment region, atmosphere after the adjustment, dirty substance is decomposed and is formed intermediate Handle the adjustment processing of water；
The intermediate treatment water is imported into the Aerobic Process for Treatment region, using the microorganism in the Aerobic Process for Treatment region by dirt Substance decomposition and formed processing water Aerobic Process for Treatment；
A part for the processing water is sent back to the processing in the Anaerobic Treatment region always,
The control program of the organic waste-water treating apparatus has：
The 1st step being measured respectively to ammonia density, full nitrogen concentration and the full phosphorus concentration of the processing water at predetermined time intervals Suddenly；
The measurement result of ammonia density, full nitrogen concentration and full phosphorus concentration based on the processing water is to detesting in the adjustment region The second step that the scope of oxygen atmosphere, micro- aerobic atmosphere and aerobic atmosphere is adjusted,
The step of second step is discussed further below：
It is more than predetermined desired value in the full nitrogen concentrationT-NAnd the ammonia density is more than predetermined desired valueNH3In the case of, Increase the scope of the aerobic atmosphere；
It is more than the desired value in the full nitrogen concentrationT-N, the ammonia density be equal to the desired valueNH3When, by the model of each atmosphere It encloses and remains unchanged；
It is more than the desired value in the full nitrogen concentrationT-N, the ammonia density be less than the desired valueNH3When, it is described micro- good to increase The scope of oxygen atmosphere；
It is the desired value in the full nitrogen concentrationT-NBelow, the phosphorus concentration is more than predetermined desired valuePWhen, detest described in increase The scope of oxygen atmosphere；
It is the desired value in the full nitrogen concentrationT-NBelow, the phosphorus concentration is the desired valuePWhen following, by each atmosphere Scope remains unchanged,
The anaerobism atmosphere is the atmosphere for the scope that ORP value is in below -200mV, and micro- aerobic atmosphere is at ORP value In the atmosphere of the scope of -50~50mV, the aerobic atmosphere is the atmosphere for the scope that ORP value is in more than 50mV.
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