CN106006974A - Shortcut nitrification and denitrification dephosphorization coupling device and method - Google Patents
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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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
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Abstract
The invention discloses a shortcut nitrification and denitrification dephosphorization coupling device and method. The device comprises a raw water tank, an A2-SBR (anaerobic-anoxic sequencing batch reactor) and an N-SBBR (N sequencing batch biofilm reactor). Wastewater enters the A2-SBR first for adsorptive external carbon source PHB synthesis and phosphorus release reaction, pH is controlled to 7.5-7.8, DO is </= 0.2mg/L, and the wastewater subjected to standing and settling; supernate enters the N-SBBR for shortcut nitrification by intermittent aeration, and supernate with NO2-N reflows into the A2-SBR for denitrification and phosphorus adsorbing reaction. Accessory apparatus comprises an electric stirring unit, an online dissolved oxygen instrument, an online pH meter, a reflow pump, an aeration pump, and a temperature controller. The shortcut nitrification and denitrification dephosphorization technology is applied in the method, denitrifying bacteria and denitrifying phosphorus-accumulating bacteria are domesticated respectively in two different SBRs, energy consumption is saved, and high-performance stable denitrification and dephosphorization are achieved.
Description
Technical field
The present invention relates to low C/N than municipal wastewater process field, especially relate to short-cut nitrification-denitrification dephosphorization coupling device and method.
Background technology
Along with body eutrophication problem is on the rise, cause water ecosystem to be degenerated and ecological environment is persecuted, aggravation the contradiction of supply and demand for the water resource,, sewage disposal discharge standard severization the most intensification at water environment pollution, under problem of water saving sharpening background, the sewage deep denitrification dephosphorization technique technology of research and development economical and efficient has become field of water pollution control important goal.Short-cut nitrification-denitrification dephosphorization coupling technique flow process is simple, saves floor occupying area, and capital construction and operating cost are low, are particularly suited for low C/N than Municipal sewage disposal.
Short-cut denitrification polyP bacteria may utilize NO2 --N carries out anoxia as electron acceptor and inhales phosphorus, the discovery of short-cut denitrification dephosphorization, solve tradition polyP bacteria and the competition of denitrifying bacterium carbon source and the contradiction of sludge age difference, achieve " carbon is dual-purpose ", reduce the power consumption that tradition polyP bacteria produces because of aeration, it is also possible to reduce the sludge yield of half.
Nitration reaction is controlled, in the nitrite nitrogen stage, to save the aeration rate of 25%, decrease operating cost compared with complete nitrification by short distance nitration.Short distance nitration reactor adds the biologic packing material of suspension, be conducive to growth of microorganism attachment, considerably increase content of microorganisms, improve sewage treating efficiency, and inside biomembrane, it is easily formed anaerobic environment, avoid nitrite nitrogen the most oxidized, it is easy to the accumulation of nitrite nitrogen, beneficially the carrying out of short distance nitration reaction.
Although this technology has the most advantages, but due to technique, concentration of substrate, sewage matrix species difference, NO2 --N concentration poisonous critical value has bigger difference, and the research of short-cut denitrification dephosphorization actually at present the most generally relies on tradition polyP bacteria cultivation experience to implement, the present invention is on forefathers' Research foundation, it is intended that short-cut nitrification-denitrification dephosphorization process runs provides control method and operational factor, there is provided theoretical foundation for short-cut nitrification-denitrification dephosphorization process economical and efficient stable operation, finally realize its industrial applications.
Summary of the invention
It is an object of the invention to provide a kind of short-cut nitrification-denitrification dephosphorization coupling device and method, the method utilizes technique of real-time control that course of reaction and parameter are optimized regulation and control, it is applicable to low C/N than municipal wastewater process field, is that a kind of economical and efficient synchronizes advanced nitrogen dephosphorization coupling technique.
In order to solve the problem that prior art exists, the technical solution used in the present invention is:
Short-cut nitrification-denitrification dephosphorization coupling device, includes former water tank, A2-sbr reactor device and N-SBBR reactor；Former water tank connects A2-sbr reactor device, A2-sbr reactor device is connected with N-SBBR reactor；At former water tank and A2Time controller and battery valve it is provided with between-sbr reactor device；
Described A2-sbr reactor device is made up of double-deck lucite cylinder, is internally provided with time controller and electric blender；Online dissolved oxygen instrument electrode support is fixed on A2In-sbr reactor device, control online dissolved oxygen instrument with time controller and open and close；Online pH meter electrode support is fixed on A2In-sbr reactor device, online pH meter has been simultaneously connected with time controller, the first acid adding pump and first adds alkali pump；Latex tubing and A are passed through in one end of first acid adding pump2-sbr reactor device is connected, and the other end is connected with HCl solution by latex tubing；First adds alkali pump one end by pipeline and A2-sbr reactor device is connected, and the other end is connected with NaOH solution；A2It is provided with on-sbr reactor device and connects sample valve, outlet valve and final drain valve；Outlet valve is each connected with time controller, electromagnetic valve respectively with final drain valve, is connected with N-SBBR reactor water intaking valve by pipeline；A2It is provided with mud valve bottom-sbr reactor device；Temperature control water bath is by pipeline and immersible pump, A2-sbr reactor device outer wall is connected；
Described N-SBBR reactor is made up of double-deck lucite cylinder, is internally provided with time controller and electric blender；Online dissolved oxygen instrument electrode support is fixed in N-SBBR reactor, and time controller controls online dissolved oxygen instrument and opens and closes；HCl solution is connected with N-SBBR reactor by the second acid adding pump conduit；NaOH solution adds alkali pump pipeline by second and is connected with N-SBBR reactor；Online pH meter electrode support is fixed in N-SBBR reactor；Online pH meter simultaneously with time controller, the second acid adding pump, second add alkali pump and be connected；It is provided with on N-SBBR reactor and connects sample valve；N-SBBR reactor outlet connects electromagnetic valve, time controller and peristaltic pump, by pipeline by N-SBBR reactor and A2-sbr reactor device is connected；The bottom of N-SBBR reactor is provided with aeration plate, and aeration plate is connected with gas flowmeter, time controller and aeration pump successively；The outer wall of N-SBBR reactor is connected with temperature control water bath by pipeline；N-SBBR reactor bottom is provided with mud valve；It is provided with biologic packing material in N-SBBR reactor.
Described biologic packing material is polyurethane material, and in reticulated porous structures, porosity is more than 90%, and specific surface area is more than 5000m2/m3, aperture 2～2.5mm, filling rate 30%～35%.
Short-cut nitrification-denitrification dephosphorization coupling process, includes following steps:
The most former water is entered A by former water tank gravity stream2-sbr reactor device, electric blender starts to stir 2h, and electric blender rotating speed 30～40r/min, DO controls below 0.2mg/L；
(2) stopping stirring, quiet heavy 0.5h after anaerobic reaction terminates, supernatant gravity stream enters N-SBBR reactor, starts electric blender and aeration pump, and short distance nitration reaction occurs, and by bottom aeration plate aeration, it is 2～4mg/L that DO controls, NO2 --N concentration 20～25 mg/L, the response time is 2h；
(3), after short distance nitration terminates, quiet heavy 0.5h, supernatant injects A by reflux pump2-sbr reactor device, short-cut denitrification polyP bacteria, using nitrite nitrogen as electron acceptor, PHB as electron donor, occurs anoxic denitrification to inhale phosphorus reaction, and pH controls 7.5～7.8；
(4), after denitrifying phosphorus uptake reaction terminates, quiet heavy 0.5h, supernatant discharges through drain valve, and mud discharged by bottom mud valve, sludge concentration 2500～3000mg/L；
The most former water gravity stream instantaneous entrance A2, there is anaerobic phosphorus release reaction in-sbr reactor device, electric blender is opened 2h, staticly settled 0.5h after water inlet end, supernatant enters N-SBBR reactor by gravity stream, and short distance nitration reaction occurs, and electric blender starts 2h, aeration pump intermittent aerating 2h, staticly settles 0.5h, containing NO2 -The supernatant of-N refluxes A through reflux pump2, there is anoxic denitrification dephosphorization reaction in-sbr reactor device, electric blender reopens 2h, staticly settles 0.5h, and supernatant is discharged through drain valve, and excess sludge is discharged through mud valve, A2-sbr reactor device and N-SBBR reactor repeat to operate above mode.
(2) described step uses the mode of intermittent aerating, and aeration pump starts once at interval of 30min, each aeration 30min.
Advantage for present invention with effect is:
The present invention uses short distance nitration coupling denitrification dephosphorization process to carry out synchronous denitrification dephosphorizing, is a kind of microbial treatment method being applicable to and processing low C/N than sewage, and this technique includes former water tank, an A2-sbr reactor device, a N-SBBR reactor.Sewage initially enters A2-sbr reactor device, carries out absorbing outer carbon source synthesis PHB and releasing phosphorus reaction, controls pH=7.5～7.8, DO≤0.2mg/L, then staticly settle；Supernatant enters N-SBBR reactor, and intermittent aerating generation short distance nitration reacts, containing NO2 -The supernatant of-N is back to A again2, there is denitrifying phosphorus uptake reaction in-sbr reactor device.This technique application short distance nitration and Denitrifying Phosphorus Removal Technology, tame nitrifier from Denitrifying Phosphate Accumulating Organisms, energy efficient, it is achieved that efficient stable denitrogenation dephosphorizing respectively in two different sbr reactor devices.Short-cut nitrification-denitrification dephosphorization process and control method, have the advantage that nitrite bacteria grows in two different SBR from Denitrifying Phosphate Accumulating Organisms, it is to avoid two kinds of antibacterials compete with one another for, and can be greatly improved denitrogenation dephosphorizing reaction efficiency；Sbr reactor device is installed real-time control system and is regulated and controled, and the method for operation is flexible and changeable, it is ensured that system high efficiency stable operation, and has saved capital construction and operating cost；By the way of intermittent aerating, control dissolved oxygen, nitration reaction is controlled at Nitrification Stage, reduce aeration rate, response time and sludge yield, energy efficient；Short distance nitration reactor arranges biologic packing material, can form relatively hypoxia district, it is to avoid nitrite nitrogen is the most oxidized inside filler, improves nitrite nitrogen accumulation rate；Using polyurethane biologic packing material, shape specification is flexible and changeable, and specific surface area is more than 5000m2/m3, filling rate 30%～35%, nitrite accumulation amount 20～25 mg/L；Use the mode of nitrosation liquid backflow, carry out anoxic denitrification and inhale phosphorus reaction, it is achieved that " carbon is dual-purpose ", it is to avoid carbon source is competed, be suitable for low C/N and compare sanitary sewage.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of short-cut nitrification-denitrification dephosphorization coupling device of the present invention；
Fig. 2 is one cycle operation mode figure of short-cut nitrification-denitrification dephosphorization coupling process of the present invention.
I-A in figure2-SBR；Ⅱ-N-SBBR；The former water tank of 1-；2-time controller；3-battery valve；The online dissolved oxygen instrument of 4-；5-electric blender；The online pH meter of 6-；37-the first acid adding pump；38-first adds alkali pump；9-HCl solution；10-NaOH solution；11-connects sample valve；The final drain valve of 12-；13-outlet valve；14-mud valve；15-water intaking valve；16-temperature control water bath；17-immersible pump；18-peristaltic pump；19-aeration plate；20-gas flowmeter；21-aeration pump；22-biologic packing material；47-the second acid adding pump；48-second adds alkali pump.
Detailed description of the invention
The present invention is described in detail with example below in conjunction with the accompanying drawings:
As it is shown in figure 1, short-cut nitrification-denitrification dephosphorization coupling device of the present invention, mainly include former water tank 1, A2-sbr reactor device I and N-SBBR reactor II；Former water tank 1 connects A2-sbr reactor device, A2-sbr reactor device is connected with N-SBBR reactor；At former water tank 1 and A2Time controller 2 and battery valve 3 it is provided with between-sbr reactor device.
Described N-SBBR reactor is made up of double-deck lucite cylinder, is internally provided with electric blender 5.Online dissolved oxygen instrument 4 electrode support is fixed on A2In-sbr reactor device, control online dissolved oxygen instrument 4 with time controller 2 and open and close；Online pH meter 6 electrode support is fixed on A2In-sbr reactor device, online pH meter 6 one end is connected with time controller 2, and the other end and the first acid adding pump 37 and first add alkali pump 38 and be connected；First acid adding pump 37 is by latex tubing one end and A2-sbr reactor device is connected, and the other end is connected with HCl solution 9；First adds alkali pump 38 by latex tubing one end and A2-sbr reactor device is connected, and the other end is connected with NaOH solution 10；A2It is provided with on-sbr reactor device and connects sample valve 11, outlet valve 12 and final drain valve 13；Outlet valve 12 is each connected with time controller 2, electromagnetic valve 3 respectively with final drain valve 13, is connected with N-SBBR reactor water intaking valve 15 by pipeline；A2Mud valve 14 it is provided with bottom-sbr reactor device；Temperature control water bath 16 is by pipeline and immersible pump 17, A2-sbr reactor device outer wall is connected；
As in figure 2 it is shown, described A2-sbr reactor device reaction pattern: instant water coming-in-anaerobism 2h-anoxia 2h-precipitation 0.5h-draining.
Described N-SBBR reactor is made up of double-deck lucite cylinder, is internally provided with time controller 2 and electric blender 5；Online dissolved oxygen instrument 4 electrode support is fixed in N-SBBR reactor, and time controller 2 controls online dissolved oxygen instrument 4 and opens and closes；HCl solution 9 is connected with N-SBBR reactor by the pipeline of the second acid adding pump 47；NaOH solution 10 is connected with N-SBBR reactor by the second pipeline adding alkali pump 48；Online pH meter 6 electrode support is fixed in N-SBBR reactor；Online pH meter 6 adds alkali pump 48 with time controller the 2, second acid adding pump 47 and second respectively and is connected；It is provided with on N-SBBR reactor and connects sample valve 11；N-SBBR reactor outlet 13 connects electromagnetic valve 3, time controller 2 and peristaltic pump 18 respectively, by pipeline by N-SBBR reactor and A2-sbr reactor device is connected；The bottom of N-SBBR reactor is provided with aeration plate 19, and aeration plate 19 is connected with gas flowmeter 20, time controller 2 and aeration pump 21 successively；The outer wall of N-SBBR reactor is connected with temperature control water bath 16 by pipeline；N-SBBR reactor bottom is provided with mud valve 14；Biologic packing material 22 it is provided with in N-SBBR reactor.Biologic packing material 22 is polyurethane material, and in reticulated porous structures, porosity is more than 90%, and specific surface area is more than 5000m2/m3, aperture 2～2.5mm, shape specification is flexible and changeable, filling rate 30%～35%.
As in figure 2 it is shown, N-SBBR reactor operational mode: instant water coming-in-support well intermittent aerating 2h-precipitation 0.5h-draining.
Short-cut nitrification-denitrification dephosphorization coupling process of the present invention, includes following steps:
Said apparatus is used to process sanitary sewage, two lucite sbr reactor devices are each activated individually, inoculation carrys out city neighborhood sanitary sewage, take the north, Shenyang secondary sedimentation tank of sewage treatment work sludge acclimatization nitrite bacteria and short-cut denitrification polyP bacteria, MLSS is 2500～3000 mg/L, coupled system runs 2 cycles, A every day2-sbr reactor device each periodic duty 5h, N-SBBR reactor each periodic duty 3h, processes the water yield 40L/d day.In course of reaction, anaerobic condition by electric blender by muddy water mix homogeneously, aerobic condition is provided by aeration pump and aeration plate and supports aeration, the dissolved oxygen value in reactor is controlled by DO survey meter and gas flowmeter, by pH meter, acid adding pump and the pH value added in alkali pump regulator control system, temperature is controlled by heating in water bath, and whole process is by time controller and battery valve auto-control.
1) former water is entered A by former water tank gravity stream2-sbr reactor device, after water inlet end, electric blender starts stirring, short-cut denitrification polyP bacteria absorbs outer carbon source and synthesizes PHB and be stored in intracellular, there is anaerobic phosphorus release reaction simultaneously, for ensureing anaerobic environment, electric blender rotating speed 30～40r/min, mixing speed is with muddy water mix homogeneously and does not destroy mud granule and is advisable.Control DO jointly controlling PH less than 0.2mg/L, pH survey meter and acid and alkali pumps is 7.5～7.8, and heating in water bath regulating and controlling temperature 22～24 DEG C, the response time is 2h；
2) after anaerobic reaction terminates, quiet heavy 0.5h, supernatant gravity stream enters N-SBBR reactor, after water inlet end, start electric blender and aeration pump, short distance nitration reaction occurs, by bottom aeration plate aeration, for avoiding nitrite nitrogen to aoxidize further, using the mode of intermittent aerating, aeration pump starts once at interval of 30min, each aeration 30min, it is 2～4mg/L that DO detector and gas flowmeter control DO, and the response time is 2h；
3) setting biologic packing material in N-SBBR reactor, biologic packing material material is polyurethane, and specific surface area is more than 5000m2/m3, aperture 2～2.5mm, shape specification is flexible and changeable, can select suitable biologic packing material size, filling rate 30%～35% according to filler fluidized state；The setting of biologic packing material adds the apposition growth amount of microorganism, adding reactor uses intermittent aerating mode to run, and can form relatively hypoxia environment inside filler, it is to avoid the further oxidation of nitrite nitrogen, improve nitrite nitrogen conversion ratio, nitrite accumulation amount 20～25 mg/L；
4), after short distance nitration terminates, quiet heavy 0.5h, supernatant injects A by reflux pump2-sbr reactor device, after water inlet end, starts electric blender, and short-cut denitrification polyP bacteria is with nitrite nitrogen NO2 --N as electron donor, occurs anoxic denitrification to inhale phosphorus reaction as electron acceptor, PHB, and pH controls 7.5～7.8；The denitrifying phosphorus uptake response time is 2h, and this technique is suitable for low C/N than municipal wastewater synchronous denitrification dephosphorizing, reduces sewage disposal energy consumption；
5), after denitrifying phosphorus uptake reaction terminates, quiet heavy 0.5h, supernatant discharges through drain valve, and mud discharged by bottom mud valve, sludge concentration 2500～3000mg/L, and it is 20～23d that SRT controls.
6) former water gravity stream instantaneous entrance A2, there is anaerobic phosphorus release reaction in-sbr reactor device, electric blender is opened 2h, staticly settled 0.5h after water inlet end, supernatant enters N-SBBR reactor by gravity stream, and short distance nitration reaction occurs, and electric blender starts 2h, aeration pump intermittent aerating 2h, staticly settles 0.5h, containing NO2 -The supernatant of-N refluxes A through reflux pump2, there is anoxic denitrification dephosphorization reaction in-sbr reactor device, electric blender reopens 2h, staticly settles 0.5h, and supernatant is discharged through final drain valve, and excess sludge is discharged through mud valve, A2-sbr reactor device and N-SBBR reactor repeat to operate above mode.
With laboratory periphery community life sewage for processing object, investigate short-cut nitrification-denitrification dephosphorization system denitrogenation dephosphorizing performance.
During test, sewage quality is as follows:
| Index | COD | NH4 +_N | NO2 --N | NO3 --N | TP |
| Scope | 123.4～280.42 | 34.02～70.78 | 0～0.52 | 0～1.34 | 4.07～8.69 |
| Average | 200.33 | 41.37 | 0.27 | 0.56 | 6.84 |
Operational factor during test:
A2-SBR dischargeable capacity 20L；
Anaerobic stages: response time 2h, pH=7.5～7.8, DO≤0.2mg/L, inflow 20L；
Anoxic phases: response time 2h, DO=0.2～0.5, temperature 22～24 DEG C, blender rotating speed 30～40r/min；
Quiet heavy 30min, sludge age 20～23d, sludge concentration 2800～3200mg/L；
N-SBBR dischargeable capacity 20L, biologic packing material filling rate 30%～35%.
Nitrification Stage: response time 2h, DO=2～4mg/L, pH=7.4～8.3, biologic packing material filling rate 30%～35%.
Quiet heavy 30min, sludge age 20～23d, sludge concentration 3000～3500mg/L；
Under this service condition, response system water outlet COD, NH4 +_N、NO2 --N、NO3 --N, TP be respectively 25.33,4.82,3.26,1.23,0.37mg/L, each effluent index all reaches " urban wastewater treatment firm pollutant emission standard " one-level A standard.
Claims (4)
1. short-cut nitrification-denitrification dephosphorization coupling device, it is characterised in that include former water tank, A2-sbr reactor device and N-SBBR reactor；Former water tank connects A2-sbr reactor device, A2-sbr reactor device is connected with N-SBBR reactor；At former water tank and A2Time controller and electromagnetic valve it is provided with between-sbr reactor device；
Described A2-sbr reactor device is made up of double-deck lucite cylinder, is internally provided with time controller and electric blender；Online dissolved oxygen instrument electrode support is fixed on A2In-sbr reactor device, control online dissolved oxygen instrument with time controller and open and close；Online pH meter electrode support is fixed on A2In-sbr reactor device, online pH meter has been simultaneously connected with time controller, the first acid adding pump and first adds alkali pump；By latex tubing, the first acid adding pump one end and A2-sbr reactor device is connected, and the other end is connected with HCl solution；First adds alkali pump one end and A2-sbr reactor device is connected, and the other end is connected with NaOH solution；A2It is provided with on-sbr reactor device and connects sample valve, outlet valve and final drain valve；Outlet valve is each connected with time controller, electromagnetic valve respectively with final drain valve, is connected with N-SBBR reactor water intaking valve by pipeline；A2It is provided with mud valve bottom-sbr reactor device；Temperature control water bath is by pipeline and immersible pump, A2-sbr reactor device outer wall is connected；
Described N-SBBR reactor is made up of double-deck lucite cylinder, is internally provided with time controller and electric blender；Online dissolved oxygen instrument electrode support is fixed in N-SBBR reactor, and time controller controls online dissolved oxygen instrument and opens and closes；HCl solution is connected with N-SBBR reactor by the second acid adding pump conduit；NaOH solution adds alkali pump pipeline by second and is connected with N-SBBR reactor；Online pH meter electrode support is fixed in N-SBBR reactor；Online pH meter simultaneously with time controller, the second acid adding pump, second add alkali pump and be connected；It is provided with on N-SBBR reactor and connects sample valve；N-SBBR reactor outlet connects electromagnetic valve, time controller and peristaltic pump, by pipeline by N-SBBR reactor and A2-sbr reactor device is connected；The bottom of N-SBBR reactor is provided with aeration plate, and aeration plate is connected with gas flowmeter, time controller and aeration pump successively；The outer wall of N-SBBR reactor is connected with temperature control water bath by pipeline；N-SBBR reactor bottom is provided with mud valve；It is provided with biologic packing material in N-SBBR reactor.
Short-cut nitrification-denitrification dephosphorization coupling device the most according to claim 1, it is characterised in that described biologic packing material is polyurethane material, in reticulated porous structures, porosity is more than 90%, and specific surface area is more than 5000m2/m3, aperture 2～2.5mm, filling rate 30%～35%.
3. short-cut nitrification-denitrification dephosphorization coupling process, it is characterised in that include following steps:
The most former water is entered A by former water tank gravity stream2-sbr reactor device, electric blender starts to stir 2h, and electric blender rotating speed 30～40r/min, DO controls below 0.2mg/L；
(2) stopping stirring, quiet heavy 0.5h after anaerobic reaction terminates, supernatant gravity stream enters N-SBBR reactor, starts electric blender and aeration pump, and short distance nitration reaction occurs, and by bottom aeration plate aeration, it is 2～4mg/L that DO controls, NO2 --N concentration 20～25 mg/L, the response time is 2h；
(3), after short distance nitration terminates, quiet heavy 0.5h, supernatant injects A by reflux pump2-sbr reactor device, short-cut denitrification polyP bacteria, using nitrite nitrogen as electron acceptor, PHB as electron donor, occurs anoxic denitrification to inhale phosphorus reaction, and pH controls 7.5～7.8；
(4), after denitrifying phosphorus uptake reaction terminates, quiet heavy 0.5h, supernatant discharges through drain valve, and mud discharged by bottom mud valve, sludge concentration 2500～3000mg/L；
The most former water gravity stream instantaneous entrance A2, there is anaerobic phosphorus release reaction in-sbr reactor device, electric blender is opened 2h, staticly settled 0.5h after water inlet end, supernatant enters N-SBBR reactor by gravity stream, and short distance nitration reaction occurs, and electric blender starts 2h, aeration pump intermittent aerating 2h, staticly settles 0.5h, containing NO2 -The supernatant of-N refluxes A through reflux pump2, there is anoxic denitrification dephosphorization reaction in-sbr reactor device, electric blender reopens 2h, staticly settles 0.5h, and supernatant is discharged through drain valve, and excess sludge is discharged through mud valve, A2-sbr reactor device and N-SBBR reactor repeat to operate above mode.
Short-cut nitrification-denitrification dephosphorization coupling process the most according to claim 3, it is characterised in that (2) described step uses the mode of intermittent aerating, aeration pump starts once at interval of 30min, each aeration 30min.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107162193A (en) * | 2017-06-23 | 2017-09-15 | 北京工业大学 | Hypoxemia nitrification coupling short-cut denitrification Anammox handles the device and method of sanitary sewage |
| CN108046431A (en) * | 2017-12-18 | 2018-05-18 | 北京大学深圳研究生院 | A kind of automaton and method for realizing Low Concentration Ammonia Containing Wastewater short distance nitration |
| CN113526664A (en) * | 2021-08-05 | 2021-10-22 | 北京科技大学 | System for rapidly enriching denitrifying phosphorus accumulating bacteria and operation method |
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