CN101708922A - Denitrification dephosphorizing reactor - Google Patents
Denitrification dephosphorizing reactor Download PDFInfo
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- CN101708922A CN101708922A CN200910193450A CN200910193450A CN101708922A CN 101708922 A CN101708922 A CN 101708922A CN 200910193450 A CN200910193450 A CN 200910193450A CN 200910193450 A CN200910193450 A CN 200910193450A CN 101708922 A CN101708922 A CN 101708922A
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Abstract
The invention discloses a denitrification dephosphorizing reactor. A water inlet tank of the reactor is connected with the denitrification dephosphorizing reactor shell through a water inlet pump; a pipeline connected with a blower penetrates into the denitrification dephosphorizing reactor shell; a stirrer is arranged in the shell; a thermostatic water bath is connected with the denitrification dephosphorizing reactor shell; and a water outlet is arranged on the shell. The invention is characterized in that the denitrification dephosphorizing reactor also comprises a feeding box, a feeding pump and a programmable logic controller (PLC), wherein the feeding box is connected with the denitrification dephosphorizing reactor shell through the feeding pump; and the programmable logic controller (PLC) is respectively connected with the water inlet pump, the feeding pump, a blower, a drain valve and the stirrer. The invention realizes the synchronous denitrification and dephosphorization by using NO3-N as the electron acceptor, and the programmable logic controller (PLC) automatically controls the operational denitrification dephosphorizing reaction, thereby reducing the anaerobic time period of the anaerobic/aerobic sequential dephosphorizing reactor and reducing the aeration quantity and the power consumption.
Description
Technical field
The present invention relates to a kind of denitrification dephosphorizing reactor, specifically is a kind of by add NaNO when aerobic/anaerobic sequence batch (dephosphorizing reactor anaerobism finishes
3Solution makes reactor under anoxic condition, with NO
3 --N replaces O
2Denitrification dephosphorization denitrification for electron acceptor(EA).
Background technology
Denitrification dephosphorization (Denitrifying dephosphatation) technology is meant denitrifying phosphorus removing bacteria (DenitrifyingPhosphorus removal Bacteria, be called for short DPB) behind anaerobic phosphorus release, under anoxia condition,, realize denitrogenation and dephosphorization synchronously with the electron acceptor(EA) of nitrate as suction phosphorus.Denitrifying phosphorus removing bacteria is proved has the metabolic characteristics very similar with aerobic dephosphorization bacterial.Because denitrifying phosphorus removing bacteria can be taken the photograph phosphorus in anaerobic environment, this just makes takes the photograph phosphorus and these two bioprocesss of denitrification denitrogenation are finished under with a kind of environment in the lump by same quasi-microorganism: only consume the required organism amount of independent biological phosphate-eliminating, just can reach the synchronous removal of nitrogen phosphorus; And take the photograph phosphorus and under anaerobic environment, replace oxygen as absorbing phosphatic electron acceptor(EA) by nitrate, saved aeration rate; Denitrification is finished by similar bacterium with dephosphorization, also can reduce sludge yield.This novel sewage disposal technology quite is fit to the requirement that current sewage disposal changes to Sustainable development: the energy denitrogenation dephosphorizing purifies water, power consumption is few, sludge yield is few, COD consumes few.It is a kind of biological carbon and phosphorous removal technology of novel high-efficiency low energy consumption.But current denitrification dephosphorizing reactor substantially all is a hand gear, expends a large amount of unnecessary manpowers, and is difficult to accurate control.
Summary of the invention
The object of the present invention is to provide a kind of with NO
3 --N is that electron acceptor(EA) is realized synchronous denitrifying phosphorus removal, and is controlled the denitrification dephosphorizing reactor of operation automatically by the PLC programmable logic controller.
Purpose of the present invention is achieved through the following technical solutions:
A kind of denitrification dephosphorizing reactor comprises denitrification dephosphorizing reactor cylindrical shell, inlet chest, intake pump, gas blower, agitator, water outlet; Inlet chest is connected with the denitrification dephosphorizing reactor cylindrical shell by intake pump; The pipeline that connects gas blower gos deep into being provided with agitator in the cylindrical shell in the denitrification dephosphorizing reactor cylindrical shell, and water bath with thermostatic control is connected with the denitrification dephosphorizing reactor cylindrical shell; Water outlet is located on the cylindrical shell; Described denitrification dephosphorizing reactor also comprises dosing tank, dosing pump and PLC programmable logic controller, and dosing tank is connected with the denitrification dephosphorizing reactor cylindrical shell by dosing pump; The PLC programmable logic controller is connected with intake pump, dosing pump, gas blower, water discharge valve and agitator respectively.
Described denitrification dephosphorizing reactor also is provided with thief hole, and thief hole is located at outer wall vertical direction on the cylindrical shell, establishes a thief hole from the right cylinder bottom every 10～15cm.
Thermometer also is housed in the described denitrification dephosphorizing reactor.
Described reactor is also protected water-sealed drainage bottle, and water-sealed drainage bottle is connected with the denitrification dephosphorizing reactor cylindrical shell by pipeline.
The present invention is by adding NaNO when former aerobic/anaerobic sequencing batch reactor anaerobism finishes
3Solution makes reactor under anoxic condition, with NO
3 --N replaces O
2Be the electron acceptor(EA) denitrification dephosphorization denitrification.The present invention realizes the release of phosphorus and the removal of COD in the anaerobism section; When anaerobism finishes, by having added NaNO
3Solution makes reactor be in anoxic condition, in the anoxic section with NO
3 --N replaces O
2For electron acceptor(EA) is realized the excessive absorption of phosphorus and the denitrification of nitric nitrogen; Nitrogen in that aerobic section stripping denitrification produces improves sludge settling property, and when the nitric nitrogen electron acceptor(EA) is not enough, can O
2It is the aerobic dephosphorization of second electron acceptor(EA).The present invention only consumes the required organism amount of independent biological phosphate-eliminating, just can reach the synchronous removal of nitrogen phosphorus, and replaces oxygen as absorbing phosphatic electron acceptor(EA) by nitric nitrogen under anaerobic environment, has saved aeration rate.
As the improvement of aerobic/anaerobic sequencing batch reactor, denitrification dephosphorizing reactor is provided with the aerobic aeration stage of short period of time after anoxic section denitrification dephosphorization is finished.
As further improvement in the technical proposal,, denitrification dephosphorizing reactor guarantees temperature of reactor but also being provided with the water bath with thermostatic control of attemperation.
As further improvement in the technical proposal, also be provided with water seal arrangement and enter denitrification dephosphorizing reactor to avoid anaerobism and anoxic stage oxygen.
Denitrification dephosphorizing reactor design and operation cycle 6h, anaerobism section 120min (containing into water 20min) wherein, anoxic section and aerobic section be 180min altogether, sedimentation time 40min, draining 20min.Add 6L synthetic waste water when the phase begins weekly, after stirring through the 2h anaerobism, add NaNO
3Liquid carries out anoxia stirring, aerobic aeration subsequently.When aerobic the end, reach the control mud purpose in age by the spoil disposal water mixed liquid.Total hrt 12h, water-filling is than 0.5.Adopt the PLC programmable logic controller to control water inlet, aeration, stirring, precipitation, draining and the NaNO of sbr reactor device automatically
3Interpolation, and can adjust working time of each step of reaction according to actual needs.Adopt the interior temperature of water bath with thermostatic control controlling reactor about 30 ℃.
Compared with the prior art, the present invention has following beneficial effect:
(1) denitrification dephosphorizing reactor of the present invention has increased the automatic operation of PLC programmable logic controller in order to controlling reactor on the basis of existing technology; But the water bath with thermostatic control that is provided with attemperation guarantees temperature of reactor, also is provided with water-sealed drainage bottle and enters denitrification dephosphorizing reactor to avoid anaerobism and anoxic stage oxygen.
(2) the present invention adds NaNO when aerobic/anaerobic sequencing batch reactor anaerobism finishes
3Solution makes reactor under anoxic condition, with NO
3 --N replaces O
2Be the electron acceptor(EA) denitrification dephosphorization denitrification.Only need to consume the required organism of independent biological phosphate-eliminating, reduced the needed organism amount of denitrification, biological phosphate-eliminating and denitrification process all need organism, but organism quantity contained in the sewage is normally limited, if limited organism can be used for dephosphorization and two purposes of denitrogenation simultaneously, then can reduce because of its not enough competitive contradiction that causes.Especially the South China Urban sanitary sewage while denitrogenation dephosphorizing for low C/N and C/P ratio provides new thinking.
(3) the present invention NO
3 --N replaces oxygen as electron acceptor(EA), can also reduce aeration rate and sludge yield, reduces investment outlay and working cost.
(4) denitrification dephosphorizing reactor technology of the present invention all has good effect of removing to COD, ammonia nitrogen and phosphorus, and water outlet COD is (manual simulation's sanitary sewage, treatment scale 24L/d) below 20mg/L, and ammonia nitrogen is below 4mg/L; TP is below 0.5mg/L, and removal effect all reaches national grade one discharge standard.
Description of drawings
Fig. 1 is a denitrification dephosphorizing reactor synoptic diagram of the present invention;
Fig. 2 is a denitrification dephosphorization reacting flow chart of the present invention;
Fig. 3 is the removal effect synoptic diagram of denitrification dephosphorizing reactor of the present invention to CODGr;
Fig. 4 is the removal effect synoptic diagram of denitrification dephosphorizing reactor of the present invention to ammonia nitrogen;
Fig. 5 is the removal effect synoptic diagram of denitrification dephosphorizing reactor of the present invention to TP;
Fig. 6 is a denitrification dephosphorizing reactor typical cycle change of water quality synoptic diagram of the present invention.
Embodiment
Come below in conjunction with Figure of description that the invention will be further described, but the present invention's scope required for protection is not limited to the scope described in the embodiment.
As the improvement of aerobic/anaerobic sequencing batch reactor, denitrification dephosphorizing reactor remains with the aerobic aeration stage of short period of time after the anoxic section denitrification dephosphorization of operation is finished.As shown in Figure 1, a kind of denitrification dephosphorizing reactor comprises inlet chest 1, intake pump 2, dosing tank 3, dosing pump 4, gas blower 5, thief hole 6, agitator 7, thermometer 8, water outlet 9; Water-sealed drainage bottle 10 and water bath with thermostatic control 11 and PLC programmable logic controller 14.Inlet chest 1 is connected with denitrification dephosphorizing reactor cylindrical shell 13 by intake pump 2; Dosing tank 3 is connected with denitrification dephosphorizing reactor cylindrical shell 13 by dosing pump 4.Gas blower 5 gos deep in the denitrification dephosphorizing reactor cylindrical shell 13 by pipeline, be provided with agitator 7 in the cylindrical shell 13, thief hole 6 and water outlet 9 are located on the cylindrical shell 13, water-sealed drainage bottle 10 is connected with denitrification dephosphorizing reactor cylindrical shell 13 with water bath with thermostatic control 11, thermometer 8 also is housed in the cylindrical shell 13, reflects the temperature in the reactor in real time.But the water bath with thermostatic control attemperation guarantees temperature of reactor.PLC programmable logic controller 14 is connected with agitator 7 with intake pump 2, dosing pump 4, gas blower 5, the water discharge valve that is arranged on thief hole 6 places respectively, controls water inlet, aeration, stirring, precipitation, draining and the NaNO of sbr reactor device automatically
3Interpolation; And can adjust working time of each step of reaction according to actual needs.PLC programmable logic controller 14 also can be by being connected the control bath temperature with water bath with thermostatic control 11.Thief hole 6 is located at outer wall vertical direction on the cylindrical shell 13, establishes a thief hole from the right cylinder bottom every 10～15cm.
Denitrification dephosphorizing reactor also is provided with water seal arrangement and enters denitrification dephosphorizing reactor to avoid anaerobism and anoxic stage oxygen.Water seal arrangement is mainly water-sealed drainage bottle 10, water-sealed drainage bottle 10 is an Erlenmeyer flask, in distilled water is housed, open an aperture on the top of denitrification dephosphorizing reactor tube, be connected with water-sealed drainage bottle with pipeline, pipeline inserts distilled water water surface below in the water-sealed drainage bottle, so both can get rid of the gas in the denitrification dephosphorizing reactor, has avoided air admission reactor (have water resistance every) again.
PLC programmable logic controller 14 specifically can be selected the PLC programmable logic controller of the V80 series of Hai Weishen company production for use.
During application, comprise the steps:
(1) anaerobism section: former water adds sequencing batch reactor by intake pump 2, and anaerobism stirs, and denitrifying phosphorus removing bacteria absorbs a large amount of organic substrates and stores in vivo with the form of PHB (poly-beta-hydroxy fourth in the born of the same parents), discharges a large amount of phosphorus simultaneously;
(2) anoxic section: above-mentioned sequencing batch reactor anoxia stirring, denitrifying phosphorus removing bacteria is an electron donor with intravital PHB, the NO that provides with dosing pump
3 --N is an electron acceptor(EA), finishes anoxic denitrification denitrogenation and excessive suction phosphorus simultaneously.
(3) aerobic section: sequencing batch reactor is the stripping aeration in short-term, is beneficial to the eliminating of nitrogen and the removal effect of reinforcement phosphorus, prevents " the secondary release " of phosphorus.
As a concrete example, sequencing batch reactor 13 is the synthetic glass container, and top is double-deck synthetic glass right cylinder, outside diameter 22cm, interior diameter 20cm, high 55cm.The bottom is a truncated cone-shaped, high 10cm, above diameter 20cm, below diameter 5cm.In reactor barrel portion outer wall vertical direction, establish an outlet from the right cylinder bottom every 7cm, totally 7, be used for sampling; At the thief hole opposite side, establish an outlet from the right cylinder bottom every 5cm, totally 5, be used for draining.An outlet is arranged at the round platform bottom, is used for emptying.All outlet ports all is connected with the valve of diameter 15cm.
Reaction time, water inlet was squeezed into reactor (flooding time 20min) by intake pump 2 when beginning, and agitator 7 beginning anaerobism stir simultaneously, time length 120min, and then dosing pump 4 is started working NaNO
3Solution adds in the reactor, and agitator 7 begins anoxia stirring at this moment, time length 150min, and gas blower 5 beginnings afterwards blast air, aeration time length 30min, postprecipitation 40min, draining 20min in reactor.One-period 6 hours, circular flow.
Denitrification dephosphorizing reactor design and operation cycle 6h, anaerobism section 120min (containing into water 20min) wherein, anoxic section and aerobic section be 180min altogether, sedimentation time 40min, draining 20min.Add 6L synthetic waste water when the phase begins weekly, after stirring through the 2h anaerobism, add NaNO
3Solution carries out anoxia stirring 150min, aerobic aeration 30min.When aerobic the end, reach the control mud purpose in age by the spoil disposal water mixed liquid.Total hrt 12h, water-filling is than 0.5.
As shown in Figure 2, when using denitrification dephosphorizing reactor dephosphorization of the present invention,, can adopt the PLC programmable logic controller to control the water inlet of sbr reactor device, aeration, stirring, precipitation, draining and NaNO automatically in each stage of anaerobism, anoxic, aeration, precipitation and draining
3Interpolation, and can adjust working time of each step of reaction according to actual needs.Adopt the interior temperature of water bath with thermostatic control controlling reactor about 30 ℃.The reactor useful volume is 12L, and test adopts simulated domestic wastewater (making carbon source with sodium acetate, readily biodegradable) to carry out.
Implementation result:
Design four different time assembled schemes, investigated the implementation result of denitrification dephosphorizing reactor respectively.The anaerobism time is controlled at 120min, and the anoxic section time is increased to 1.5h, 2h, 2.5h from 1h, and the corresponding aerobic section time reduces to 1.5h, 1h, 0.5h from 2h.One reaction time 6h.
The invention process effect is divided into 4 stages investigations, and the fs is that the anoxic section time is 1h, and the aerobic section time is 2h; Behind the system handles effect stability, after 20 days operation, carrying out second stage is the anoxic section time to be increased to 1.5h, and the corresponding influence that reduces to 1.5h to the system handles effect of aerobic section time moves 15 days; Three phases is the anoxic section time to be increased to 2h, and the corresponding influence that reduces to 1h to the system handles effect of aerobic section time moves 20 days; The quadravalence section is the anoxic section time to be increased to 2.5h, and the corresponding influence that reduces to 0.5h to the system handles effect of aerobic section time moved after 20 days, and the system handles effect stability adds 30mg/LNaNO when anaerobism finishes
3Solution makes reactor under anoxic condition, with NO
3 --N replaces O
2Be the electron acceptor(EA) denitrification dephosphorization denitrification, investigate with NO
3 --N replaces O
2Be electron acceptor(EA) denitrification dephosphorization denitrification effect.
The synthetic wastewater of artificial preparation is adopted in water inlet, and main component is: 250mgCOD/L NaAc, 9mgTP/LKH
2PO
4, 15NH
+ 4-Nmg/L NH
4Cl, 0.038g/LCaCl
22H
2O, 0.15g/LMgSO
47H
2O, the 0.3ml/L trace element solution.The trace element solution composition is (in the 1L distilled water): 10gEDTA, 1.5gFeCl
36H
2O, 0.15gH
3BO
3, 0.03gCuSO
45H
2O, 0.18gKI, 0.12gMnCl
24H
2O, 0.06gNaMoO
42H
2O, 0.12gZnSO
47H
2O, 0.15gCoCl
26H
2O.The test seed sludge is taken from Guangzhou sewage work.
Analytical procedure: COD:XJ-1 type COD counteract appearance is cleared up potassium dichromate process; TP: molybdenum-antimony anti-spectrophotometric method; NH4+-N: nessler reagent light-intensity method; NO2--N:N-(1-naphthyl)-quadrol light-intensity method; NO3--N: ultraviolet spectrophotometry.
1, the removal effect of COD
By accompanying drawing 3 as can be seen denitrification dephosphorizing reactor COD is had the good treatment effect.For the sanitary sewage (by the sodium acetate preparation) of treatment of simulated, the water outlet COD of integrated oxidation ditch remains on below the 25mg/L.All be removed at the nearly all COD of anaerobism section as can be known by accompanying drawing 5, this is owing to the carbon source of testing employing is that sodium acetate is the biological carbon source of degrading fast, there are some researches show that acetate is stimulation and the best substrate that reaches excessive biological phosphate-eliminating.When hypoxia response begins, the COD concentration of system all approaches zero, there is between conventional denitrifying bacteria (promptly have only denitrification function and do not inhale the bacterium of phosphorus function) and the denitrifying phosphorus removing bacteria competition in the reaction system hardly to nitrate, the denitrification phosphorus-collecting bacterium obtains selecting and enrichment just in such environment, becomes the dominant bacteria of reaction system.
2, the removal effect of ammonia nitrogen
By accompanying drawing 4 as can be seen, along with the minimizing of aerobic time, the water outlet ammonia nitrogen concentration is in rising trend, and its clearance constantly descends.This is that along with aerobic time decreased, nitrification weakens because the aerobic nitrification effect is mainly leaned in the removal of ammonia nitrogen, causes ammonia nitrogen removal frank to descend.Denitrification dephosphorizing reactor for the nitrification of ammonia nitrogen is and aerobic time correlation.Denitrification dephosphorizing reactor is in the process of handling artificial simulated domestic wastewater, and influent ammonia nitrogen is 20mg/L, and the final outflow water ammonia nitrogen all remains on below the 4mg/L, and clearance is more than 80%.
3, the removal of P
By accompanying drawing 5 as can be seen, find out several days that begin in each stage, the concentration of water outlet phosphorus all has lifting in various degree, and the concentration of water outlet phosphorus is stable gradually after 5-10 days.This shows that when each stage begins because the minimizing of aerobic time, aerobic dephosphorization function weakens, and causes dephosphorizing rate to descend.Along with the increase of reaction time, dephosphorizing rate rises gradually and reaches stable, and this explanation anoxic is inhaled the phosphorus effect and increased.Can see that in the stage of aerobic time 0.5h, phosphor-removing effect is still good, the water outlet phosphorus concentration is stabilized in 0.46mg/L, and reactor is stable, shows that anoxic section denitrification dephosphorization effect is remarkable gradually, is not subjected to the influence of aerobic section.
4, denitrification dephosphorizing reactor cycle change of water quality synoptic diagram
Can see that from accompanying drawing 6 typical anaerobic releases the phosphorus phenomenon, the concentration of phosphorus reaches 38.44mg/L in the system when anaerobism finishes, by NO among the figure
3 -The change in concentration of-N and TP all can be seen the absorption of phosphorus and the phenomenon that nitrate reduction carries out synchronously, and the denitrification dephosphorization reaction has promptly taken place.
Comprehensive above-mentioned experiment, denitrification dephosphorizing reactor of the present invention is as follows to the removal effect of pollutent: the removal effect to COD and phosphorus is good, and water outlet COD is below 25mg/L, and the phosphorus water outlet is below 0.5mg/L; Ammonia nitrogen removal frank is about 80%.The water outlet ammonia nitrogen is below 4mg/L.
Claims (4)
1. a denitrification dephosphorizing reactor comprises denitrification dephosphorizing reactor cylindrical shell, inlet chest, intake pump, gas blower, agitator; Inlet chest is connected with the denitrification dephosphorizing reactor cylindrical shell by intake pump; The pipeline that connects gas blower gos deep into being provided with agitator in the cylindrical shell in the denitrification dephosphorizing reactor cylindrical shell, and water bath with thermostatic control is connected with the denitrification dephosphorizing reactor cylindrical shell; Water outlet is located on the cylindrical shell; It is characterized in that described denitrification dephosphorizing reactor also comprises dosing tank, water-sealed drainage bottle, dosing pump and PLC programmable logic controller, dosing tank is connected with the denitrification dephosphorizing reactor cylindrical shell by dosing pump, with NaNO
3Add in the denitrification dephosphorizing reactor cylindrical shell; Water-sealed drainage bottle is an Erlenmeyer flask, in distilled water is housed, open an aperture on the top of denitrification dephosphorizing reactor tube, is connected with water-sealed drainage bottle with pipeline, in the pipeline insertion water-sealed drainage bottle below the distilled water water surface; The PLC programmable logic controller is connected with intake pump, dosing pump, gas blower, water discharge valve and agitator respectively.
2. kind of denitrification dephosphorizing reactor according to claim 1 is characterized in that described denitrification dephosphorizing reactor also is provided with thief hole, and thief hole is located at outer wall vertical direction on the cylindrical shell, establishes a thief hole from the right cylinder bottom every 10～15cm.
3. kind of denitrification dephosphorizing reactor according to claim 1 is characterized in that also being equipped with in the described denitrification dephosphorizing reactor thermometer.
4. denitrification dephosphorizing reactor according to claim 1 is characterized in that the PLC programmable logic controller that described PLC programmable logic controller is a V80 series.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105565597A (en) * | 2015-12-22 | 2016-05-11 | 浙江工商大学 | Enhanced biological phosphorus removal apparatus and method quickly recoverable from inhibition of nitrites |
| CN109081452A (en) * | 2018-08-17 | 2018-12-25 | 广州市市政工程设计研究总院有限公司 | A kind of sequencing wastewater treatment device that immobilization carrier biomembrane is coupled with activated sludge and technique |
| CN113461160A (en) * | 2021-06-24 | 2021-10-01 | 贵州大学 | SBR denitrifying phosphorus removal device of double-mud sequencing batch reactor and metering control method |
-
2009
- 2009-10-30 CN CN2009101934506A patent/CN101708922B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105565597A (en) * | 2015-12-22 | 2016-05-11 | 浙江工商大学 | Enhanced biological phosphorus removal apparatus and method quickly recoverable from inhibition of nitrites |
| CN109081452A (en) * | 2018-08-17 | 2018-12-25 | 广州市市政工程设计研究总院有限公司 | A kind of sequencing wastewater treatment device that immobilization carrier biomembrane is coupled with activated sludge and technique |
| CN109081452B (en) * | 2018-08-17 | 2024-01-23 | 广州市市政工程设计研究总院有限公司 | Sequencing batch sewage treatment device and process with immobilized carrier biological membrane and activated sludge coupled |
| CN113461160A (en) * | 2021-06-24 | 2021-10-01 | 贵州大学 | SBR denitrifying phosphorus removal device of double-mud sequencing batch reactor and metering control method |
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