CN110002691A - UCT, which is improved, by intermittent aerating couples the apparatus and method that autotrophic denitrification realizes the dephosphorization of low carbon source urban sewage advanced nitrogen - Google Patents

UCT, which is improved, by intermittent aerating couples the apparatus and method that autotrophic denitrification realizes the dephosphorization of low carbon source urban sewage advanced nitrogen Download PDF

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CN110002691A
CN110002691A CN201910390399.1A CN201910390399A CN110002691A CN 110002691 A CN110002691 A CN 110002691A CN 201910390399 A CN201910390399 A CN 201910390399A CN 110002691 A CN110002691 A CN 110002691A
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彭永臻
陈燕慧
孙雅雯
杜睿
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Beijing University of Technology
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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
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • 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
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    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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    • C02F2101/10—Inorganic compounds
    • C02F2101/105—Phosphorus compounds
    • 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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    • C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
    • C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
    • 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
    • C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/14—NH3-N
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    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/18—PO4-P
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    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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    • C02F2301/00—General aspects of water treatment
    • C02F2301/04—Flow arrangements
    • C02F2301/046—Recirculation with an external loop
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/06—Sludge reduction, e.g. by lysis

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Abstract

UCT coupling autotrophic denitrification, which is improved, by intermittent aerating realizes that the apparatus and method of low carbon source urban sewage advanced nitrogen dephosphorization belong to field of biological sewage treatment.The device is mainly by inlet tank, AAO reactor and secondary settling tank composition.Raw water is entered the anaerobic zone of AAO reactor by inlet tank, phosphorus is discharged under the action of denitrifying phosphorus removing bacteria, while storing internal carbon source, subsequently enters anoxic zone, and anoxic zone adds fixed filler, anchors at the anaerobic ammonia oxidizing bacteria on filler using the NH in raw water4 +The NO of-N and aerobic zone reflux2 ‑- N is used as substrate, and Anammox reaction occurs, meanwhile, denitrifying phosphorus removing bacteria utilizes NO2 ‑- N and NO3 ‑- N is used as electron acceptor, carries out denitrifying phosphorus uptake reaction, and anoxic zone part mixed liquor is back to anaerobic zone, residual mixed liquor enters aerobic zone, and aerobic zone adds floating stuffing, and by way of intermittent aerating, strengthen the inhibiting effect to NOB, short distance nitration is realized with this.The invention makes full use of raw water carbon source, and sludge sludge output is few, energy saving and operating cost.

Description

UCT, which is improved, by intermittent aerating couples autotrophic denitrification realization low carbon source urban sewage depth Spend the apparatus and method of denitrogenation dephosphorizing
Technical field
The present invention relates to improve UCT coupling autotrophic denitrification by intermittent aerating to realize that low carbon source urban sewage advanced nitrogen removes The apparatus and method of phosphorus, belong to field of biological sewage treatment
Background technique
As economic is constantly progressive, scientific and technological continuous development, people's living standard is gradually increased, industrial boom, Pollution problem is also got worse, especially water pollution problem, the rubbish in life, the pesticide in industrial wastewater and agricultural and Chemical fertilizer largely enters water body, causes water eutrophication.People life style improves, and effluent-disposal standard correspondinglys increase , but be still in a manner of traditional biological carbon and phosphorous removal at present as main processing mode, need a large amount of additional carbon And the energy, so exploitation at present can be realized high-efficient denitrification and dephosphorization and can save the sewage treatmentmethod of carbon source and the energy, It has very important significance to sewage treatment field.
Short distance nitration is in the case where there is oxygen, by ammonia oxidation bacteria (AOB) by NH4 +- N is converted into NO2 -- N, with tradition Complete nitrification is compared, and about 25% aeration quantity can be saved.Continuous flow AAO reactor is very extensive in practical applications, still It is difficult to control since continuous streamflow is big, there is very big difficulty in terms of realizing short distance nitration.The present invention was utilized in time and space Upper dual intermittent aerating strategy starts short distance, and intermittent aerating successfully starts up short distance in sbr reactor device and has been obtained and tests Card；And floating stuffing is added in aerobic zone, intermittent aerating not only can be enhanced to the inhibiting effect of NOB, can also save The volume in oxygen area reduces occupied area.
Anammox is under conditions of anoxic, and using ammoniacal nitrogen as electron acceptor, nitrite nitrogen is electron donor, is occurred Reaction generates nitrogen and a part of nitrate nitrogen；Denitrification dephosphorization is that under anaerobic, denitrifying phosphorus removing bacteria discharges intracorporal phosphorus, The organic matter in sewage is stored as internal carbon source PHA simultaneously, under anoxic conditions, using the internal carbon source of storage, with nitrite nitrogen Or nitrate nitrogen is the excessive phosphorus absorbed in sewage of electron acceptor.The fixed filler of Anammox is added in anoxic section, is facilitated The growth and withholding of anaerobic ammonia oxidizing bacteria, can effectively improve nitric efficiency；Increase the area of anoxic section, it can be poly- to denitrification The phosphorus bacterium enough suction phosphorus time, and denitrifying phosphorus removing bacteria can use the nitrate nitrogen that Anammox reaction generates, and also improve The nitrogen removal performance of system.
The present invention will improve UCT by intermittent aerating, pass through short distance nitration, Anammox and Denitrifying Phosphorus Removal Technology Realize the advanced nitrogen dephosphorization of low carbon source urban sewage.Short distance is realized with intermittent aerating, provides base for Anammox reaction Matter solves the problems, such as to be difficult to realize short distance nitration in continuous flow, saves the energy；Anammox coupling denitrification was both able to achieve Synchronous denitrification dephosphorizing, and efficiently solve influence of the dirty Organic substance in water to anaerobic ammonia oxidizing bacteria；Using UCT technique, contain Asia The returned sludge of nitrate nitrogen flows back into anoxic zone first, after Anammox and denitrification dephosphorization reaction, flows back from anoxic end To anoxic zone, the strictly anaerobic environment of anaerobic zone not only ensure that, but also effectively avoid denitrifying bacterium and polyP bacteria to organic matter Competition.So improvement UCT coupling intermittent aerating realizes the apparatus and method of low carbon source urban sewage advanced nitrogen dephosphorization, both The carbon source in raw sewage is taken full advantage of, and solves aeration energy consumption, sludge yield is low, can effectively save sewage treatment plant Operating cost.
Summary of the invention
The present invention by intermittent aerating improve UCT, applied in continuous flow to realize short distance nitration, by short distance nitration anaerobism Ammoxidation and denitrification dephosphorization combine, to realize low carbon source urban sewage advanced nitrogen dephosphorization.In the process, raw water by Inlet tank enters the anaerobic zone of AAO reactor, phosphorus is discharged under the action of denitrifying phosphorus removing bacteria, while storing internal carbon source, then Into anoxic zone, anoxic zone adds fixed filler, anchors at the anaerobic ammonia oxidizing bacteria on filler using the NH in raw water4 +- N becomes reconciled The NO of oxygen area reflux2 -- N is used as substrate, and Anammox reaction occurs, meanwhile, denitrifying phosphorus removing bacteria utilizes NO2 -- N and NO3 --N As electron acceptor, denitrifying phosphorus uptake reaction is carried out, anoxic zone part mixed liquor is back to anaerobic zone, and residual mixed liquor enters Oxygen area, aerobic zone uses intermittent aerating, and adds floating stuffing, extends hydraulic detention time of the nitrifier under intermittent aerating, Strengthen the inhibiting effect to NOB, short distance nitration is realized with this.The invention makes full use of raw water carbon source, and sludge sludge output is few, saves Energy consumption and operating cost are advantageously implemented the advanced nitrogen dephosphorization of low carbon source urban sewage.
The dress that autotrophic denitrification realizes the dephosphorization of low carbon source urban sewage advanced nitrogen is coupled using UCT is improved by intermittent aerating It sets and method, it is characterised in that: the inlet tank (1) including sequential connection, AAO reactor (2), secondary settling tank (3), AAO reactor (2) 2 lattice anaerobism are divided by water (flow) direction including 8 cell compartments, 4 lattice anoxics and 2 lattice are aerobic, and each cell compartment, which passes through, presses water flow side To staggered water flow hole connection up and down to prevent the short flow phenomenon of generation.Inlet tank (1) is anti-by intake pump (4) and water inlet pipe and AAO The first lattice anaerobism (2.1) of device (2) is answered to be connected, the second lattice aerobic (2.3) pass through internal circulation pump 2 (8) and inner circulating tube and first Lattice anoxic (2.2) is connected, and the second lattice aerobic (2.3) are connected by water outlet pump (5) and outlet pipe with secondary settling tank (3), secondary settling tank (3) In sludge be connected by sludge reflux pump (6) and mud return line with the first lattice anoxic (2.2), the 4th lattice anoxic (2.2) is led to Internal circulation pump 1 (7) and inner circulating tube is crossed to be connected with the first lattice anaerobism (2.1).Aerobic section (2.3) is placed with floating stuffing, and aeration is adopted Carry out intermittent aerating with aeration pump (9), aeration tube and aeration plate (12), each aeration plate (12) with spinner flowmeter (13) phase Even,；Anoxic section (2.2) is placed with the filler of attachment anaerobic ammonia oxidizing bacteria；Each anaerobism (2.1) and anoxic in AAO reactor (2) (2.2) cell compartment is respectively equipped with blender (11), and each aerobic lattice are respectively provided with WTW probe to monitor the dissolved oxygen of aerobic section.
The process flow of municipal sewage in this process are as follows: firstly, sanitary sewage is from inlet bucket into AAO reactor Anaerobism section, in anaerobism section, dirty Organic substance in water is stored as internal carbon source PHA by Denitrifying Phosphate Accumulating Organisms, while discharging intracorporal phosphorus；With Afterwards, mixed liquor enters the anoxic section of AAO reactor, the ammoniacal nitrogen in anoxic section, sewage and the nitrous state from aerobic section reflux Nitrogen reacts under the action of the anaerobic ammonia oxidizing bacteria being attached on filler and generates nitrogen and nitrate nitrogen, meanwhile, denitrification is poly- Phosphorus bacterium is using the internal carbon source itself stored as carbon source, and the nitrate nitrogen or nitrite nitrogen generated using Anammox is electron acceptor excess Absorb sewage in phosphorus；Last mixed liquor enters aerobic section and carries out short distance nitration, i.e., by ammonia under the action of ammonia oxidizing bacteria Nitrogen oxidation is nitrite nitrogen, and the purpose of denitrogenation dephosphorizing is realized with this.
The present invention provides improve UCT by intermittent aerating to couple autotrophic denitrification realization low carbon source urban sewage advanced nitrogen The apparatus and method of dephosphorization, it is characterised in that following content:
1) short distance nitration startup stage: being inoculated with municipal sewage plant's denitrification dephosphorization sludge in AAO reactor (2), Keep the sludge concentration of anaerobism section (2.1), anoxic section (2.2) and aerobic section (2.3) in 2500-3500mg/L；It will be in short distance nitre Change the aerobic section (2.3) that the successful filler of biofilm in pilot scale is put into AAO reactor (2), packing ratio is 20% -25%, and interval exposes Dissolved Oxygen concentration Control is in 1.0-1.5mg/L when aerobic section (2.3) aeration of gas, in this stage, when in AAO reactor (2) the Nitrous accumulation rate in the water outlet of two lattice aerobic sections (2.3) reaches 90% or more, i.e., it is believed that short distance nitration starts successfully.
2) Anammox coupling denitrification dephosphorization startup stage: the filler for being enriched with anaerobic ammonia oxidizing bacteria is launched into AAO The anoxic section (2.2) of reactor (2), filler packing ratio are 30% -35%；In this stage, municipal sewage presses water (flow) direction successively Anaerobic phosphorus release, storage are carried out respectively down through the anaerobism section (2.1), anoxic section (2.2) and aerobic section (2.3) of main reactor (2) Internal carbon source, Anammox, denitrification dephosphorization and short distance nitration reaction are deposited, by organic matter, ammonia nitrogen and the phosphorus ligands in sewage, when Organic matter, total nitrogen and the total tp removal rate of AAO reactor (2) respectively reach 80%, 80% and 95% or more, it can think to change Good UCT coupling intermittent aerating realizes that the apparatus and method of low carbon source urban sewage advanced nitrogen dephosphorization start successfully.
3) normal operating phase:
By the sludge reflux of secondary settling tank (3) to the first lattice anoxic (2.2), return sludge ratio is 100% -150%, with dimension The anaerobism section (2.1), anoxic section (2.2) and aerobic section (2.3) sludge concentration of AAO reactor (2) are held in 2500-3500mg/L, Nitrification liquid in 4th lattice anoxic (2.2) is flowed back into the first lattice anaerobism (2.1), reflux ratio is 100% -150%, to guarantee The strictly anaerobic environment of anaerobism section (2.1)；By the effluent recycling of AAO reactor (2) aerobic section (2.3) to AAO reactor (2) First lattice anoxic section (2.2), digestive juice reflux ratio are 100% -200%, can be adjusted according to effluent quality；Hydraulic retention Time is 9-12h；Sludge age is 10-15d；Continuous operation reactor, as COD≤50mg/L, NH in secondary clarifier effluent water quality4 +- N≤5mg/L, PO4 3-- P≤0.5mg/L, and after 15-20d of maintenance, that is, think that system has reached stable state；
Anaerobic phosphorus release, storage internal carbon source area (2.1) volume: anoxic denitrification dephosphorization, Anammox area (2.2) volume: Short distance nitration area volume (2.3) is 2:4:2.
The present invention improves UCT by intermittent aerating and couples the device that autotrophic denitrification realizes low carbon source urban sewage denitrogenation dephosphorizing With method, have the advantage that compared with the prior art
(1) short distance nitration is realized with intermittent aerating in continuous flow, reduces aeration quantity, save the energy.
(2) in anaerobism section, the organic matter in sewage is stored as internal carbon source by Denitrifying Phosphate Accumulating Organisms, and in the generation of anoxic section Carbon source denitrification dephosphorization makes full use of the carbon source in raw water, can synchronous denitrification dephosphorizing, and save the energy.
(3) Anammox filler is added in anoxic section, is conducive to the withholding of Anammox, add short distance in aerobic section Sludge media reinforces intermittent aerating to the inhibiting effect of NOB, to guarantee effluent quality.
Detailed description of the invention
Fig. 1 is to improve UCT by intermittent aerating to couple autotrophic denitrification realization low carbon source urban sewage advanced nitrogen dephosphorization The structural schematic diagram of apparatus and method
In Fig. 1: 1 is inlet tank, and 2 be AAO reactor, and 2.1 be anaerobism section, and 2.2 be anoxic section, and 2.3 be aerobic section, and 3 are Secondary settling tank, 4 be intake pump, and 5 be water outlet pump, and 6 be sludge reflux pump, and 7 be internal circulation pump 1,8 be internal circulation pump 2,9 be aeration pump, 10 be blender, and 11 be agitating paddle, and 12 be aeration head, and 13 be spinner flowmeter.
The dress that autotrophic denitrification realizes the dephosphorization of low carbon source urban sewage advanced nitrogen is coupled using UCT is improved by intermittent aerating It sets and method, it is characterised in that: the inlet tank (1) including sequential connection, AAO reactor (2), secondary settling tank (3), AAO reactor (2) 2 lattice anaerobism are divided by water (flow) direction including 8 cell compartments, 4 lattice anoxics and 2 lattice are aerobic, and each cell compartment, which passes through, presses water flow side To staggered water flow hole connection up and down to prevent the short flow phenomenon of generation.Inlet tank (1) is anti-by intake pump (4) and water inlet pipe and AAO The first lattice anaerobism (2.1) of device (2) is answered to be connected, the second lattice aerobic (2.3) pass through internal circulation pump 2 (8) and inner circulating tube and first Lattice anoxic (2.2) is connected, and the second lattice aerobic (2.3) are connected by water outlet pump (5) and outlet pipe with secondary settling tank (3), secondary settling tank (3) In sludge be connected by sludge reflux pump (6) and mud return line with the first lattice anoxic (2.2), the 4th lattice anoxic (2.2) is led to Internal circulation pump 1 (7) and inner circulating tube is crossed to be connected with the first lattice anaerobism (2.1).Aerobic section (2.3) is placed with floating stuffing, and aeration is adopted Carry out intermittent aerating with aeration pump (9), aeration tube and aeration plate (12), each aeration plate (12) with spinner flowmeter (13) phase Even,；Anoxic section (2.2) is placed with the filler of attachment anaerobic ammonia oxidizing bacteria；Each anaerobism (2.1) and anoxic in AAO reactor (2) (2.2) cell compartment is respectively equipped with blender (11), and each aerobic lattice are respectively provided with WTW probe to monitor the dissolved oxygen of aerobic section.
Experimental system as shown in Figure 1, main reactor dischargeable capacity be 48L, be divided into 8 lattice, effective body of each lattice Product is 6L, and reactor is all made of organic glass and is made.
Concrete operations are as follows:
1) short distance nitration startup stage: being inoculated with municipal sewage plant's denitrification dephosphorization sludge in AAO reactor (2), Keep the sludge concentration of anaerobism section (2.1), anoxic section (2.2) and aerobic section (2.3) in 2500-3500mg/L；It will be in short distance nitre Change the aerobic section (2.3) that the successful filler of biofilm in pilot scale is put into AAO reactor (2), packing ratio is 20% -25%, and interval exposes Dissolved Oxygen concentration Control is in 1.0-1.5mg/L when aerobic section (2.3) aeration of gas, in this stage, when in AAO reactor (2) the Nitrous accumulation rate in the water outlet of two lattice aerobic sections (2.3) reaches 90% or more, i.e., it is believed that short distance nitration starts successfully.
2) Anammox coupling denitrification dephosphorization startup stage: the filler for being enriched with anaerobic ammonia oxidizing bacteria is launched into AAO The anoxic section (2.2) of reactor (2), filler packing ratio are 30% -35%；In this stage, municipal sewage presses water (flow) direction successively Anaerobic phosphorus release, storage are carried out respectively down through the anaerobism section (2.1), anoxic section (2.2) and aerobic section (2.3) of main reactor (2) Internal carbon source, Anammox, denitrification dephosphorization and short distance nitration reaction are deposited, by organic matter, ammonia nitrogen and the phosphorus ligands in sewage, when Organic matter, total nitrogen and the total tp removal rate of AAO reactor (2) respectively reach 80%, 80% and 95% or more, it can think logical Cross intermittent aerating improvement UCT coupling autotrophic denitrification realize the dephosphorization of low carbon source urban sewage advanced nitrogen apparatus and method starting at Function.
3) normal operating phase:
By the sludge reflux of secondary settling tank (3) to the first lattice anoxic (2.2), return sludge ratio is 100% -150%, with dimension The anaerobism section (2.1), anoxic section (2.2) and aerobic section (2.3) sludge concentration of AAO reactor (2) are held in 2500-3500mg/L, Nitrification liquid in 4th lattice anoxic (2.2) is flowed back into the first lattice anaerobism (2.1), reflux ratio is 100% -150%, to guarantee The strictly anaerobic environment of anaerobism section (2.1)；By the effluent recycling of AAO reactor (2) aerobic section (2.3) to AAO reactor (2) First lattice anoxic section (2.2), digestive juice reflux ratio are 100% -200%, can be adjusted according to effluent quality；Hydraulic retention Time is 9-12h；Sludge age is 10-15d；Continuous operation reactor, as COD≤50mg/L, NH in secondary clarifier effluent water quality4 +- N≤5mg/L, PO4 3-- P≤0.5mg/L, and after 15-20d of maintenance, that is, think that system has reached stable state；
Anaerobic phosphorus release, storage internal carbon source area (2.1) volume: anoxic denitrification inhales phosphorus, Anammox area (2.2) volume: Short distance nitration area volume (2.3) is 2:4:2.

Claims (2)

1. coupling the dress that autotrophic denitrification realizes the dephosphorization of low carbon source urban sewage advanced nitrogen using UCT is improved by intermittent aerating It sets, it is characterised in that: the inlet tank (1) including sequential connection, AAO reactor (2), secondary settling tank (3), AAO reactor (2) include 8 cell compartments are divided into 2 lattice anaerobism by water (flow) direction, and 4 lattice anoxics and 2 lattice are aerobic, and each cell compartment passes through by above and below water (flow) direction Staggered water flow hole connection is to prevent the short flow phenomenon of generation；Inlet tank (1) passes through intake pump (4) and water inlet pipe and AAO reactor (2) The first lattice anaerobism (2.1) be connected, the second lattice aerobic (2.3) pass through internal circulation pump 2 (8) and inner circulating tube and the first lattice anoxic (2.2) it is connected, the second lattice aerobic (2.3) are connected by water outlet pump (5) and outlet pipe with secondary settling tank (3), the dirt in secondary settling tank (3) Mud is connected by sludge reflux pump (6) and mud return line with the first lattice anoxic (2.2), and the 4th lattice anoxic (2.2) is followed by interior Ring pumps 1 (7) and inner circulating tube is connected with the first lattice anaerobism (2.1)；Aerobic section (2.3) is placed with floating stuffing, and aeration is using aeration It pumps (9), aeration tube and aeration plate (12) and carries out intermittent aerating, each aeration plate (12) is connected with spinner flowmeter (13)；It lacks Oxygen section (2.2) is placed with the filler of attachment anaerobic ammonia oxidizing bacteria；Each anaerobism (2.1) and anoxic (2.2) in AAO reactor (2) Cell compartment is respectively equipped with blender, and each aerobic lattice are respectively provided with WTW probe to monitor the dissolved oxygen of aerobic section.
2. the method for application device as described in claim 1, which comprises the following steps:
1) short distance nitration startup stage: inoculation municipal sewage plant's denitrification dephosphorization sludge is kept in AAO reactor (2) The sludge concentration of anaerobism section (2.1), anoxic section (2.2) and aerobic section (2.3) is in 2500-3500mg/L；It will be in short distance nitration The successful filler of biofilm is put into the aerobic section (2.3) of AAO reactor (2) in examination, and packing ratio is 20% -25%, intermittent aerating Dissolved Oxygen concentration Control is in 1.0-1.5mg/L when aerobic section (2.3) is aerated, in this stage, when the second lattice in AAO reactor (2) Nitrous accumulation rate in the water outlet of aerobic section (2.3) reaches 90% or more, that is, thinks that short distance nitration starts successfully；
2) Anammox coupling denitrification dephosphorization startup stage: the filler for being enriched with anaerobic ammonia oxidizing bacteria is launched and is reacted into AAO The anoxic section (2.2) of device (2), filler packing ratio are 30% -35%；In this stage, municipal sewage presses water (flow) direction successively up and down By the anaerobism section (2.1), anoxic section (2.2) and aerobic section (2.3) of AAO reactor (2) anaerobic phosphorus release is carried out respectively, in storage Carbon source, Anammox, denitrification dephosphorization and short distance nitration reaction, by organic matter, ammonia nitrogen and the phosphorus ligands in sewage, work as AAO Organic matter, total nitrogen and the total tp removal rate of reactor (2) respectively reach 80%, 80% and 95% or more, that is, think to pass through interval Aeration improvement UCT coupling autotrophic denitrification realizes that the apparatus and method of low carbon source urban sewage advanced nitrogen dephosphorization start successfully；
3) normal operating phase:
By the sludge reflux of secondary settling tank (3) to the first lattice anoxic (2.2), return sludge ratio is 100% -150%, to maintain AAO Anaerobism section (2.1), anoxic section (2.2) and aerobic section (2.3) sludge concentration of reactor (2) are in 2500-3500mg/L, by Nitrification liquid in four lattice anoxics (2.2) flows back into the first lattice anaerobism (2.1), and reflux ratio is 100% -150%, to guarantee anaerobism The strictly anaerobic environment of section (2.1)；By the effluent recycling of AAO reactor (2) aerobic section (2.3) to the first of AAO reactor (2) Lattice anoxic section (2.2), digestive juice reflux ratio are 100% -200%；Hydraulic detention time is 9-12h；Sludge age is 10- 15d；Continuous operation reactor, as COD≤50mg/L, NH in secondary clarifier effluent water quality4 +- N≤5mg/L, PO4 3--P≤0.5mg/ L, and after 15-20d of maintenance, that is, think that system has reached stable state；
Anaerobic phosphorus release, storage internal carbon source area (2.1) volume: anoxic denitrification inhales phosphorus, Anammox area (2.2) volume: short distance Nitrification zone volume (2.3) is 2:4:2.
CN201910390399.1A 2019-05-10 2019-05-10 UCT, which is improved, by intermittent aerating couples the apparatus and method that autotrophic denitrification realizes the dephosphorization of low carbon source urban sewage advanced nitrogen Pending CN110002691A (en)

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CN113979539B (en) * 2021-11-12 2023-05-26 广州大学 Light-induced mud film composite autotrophic denitrification technology and reactor
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