CN116924569B - System and method for enhancing denitrification and dephosphorization of sewage with low carbon-nitrogen ratio - Google Patents

System and method for enhancing denitrification and dephosphorization of sewage with low carbon-nitrogen ratio Download PDF

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CN116924569B
CN116924569B CN202311188351.5A CN202311188351A CN116924569B CN 116924569 B CN116924569 B CN 116924569B CN 202311188351 A CN202311188351 A CN 202311188351A CN 116924569 B CN116924569 B CN 116924569B
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reaction
sewage
nitrogen
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reactor
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CN116924569A (en
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武肖莎
孟熙
魏丹丹
仝翠
聂丽位
李玲
蒋东
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China Railway Inter City Planning Construction Co ltd
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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
    • C02F3/302—Nitrification and denitrification 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
    • C02F3/302—Nitrification and denitrification treatment
    • C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
    • 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
    • C02F2101/00—Nature of the contaminant
    • 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
    • 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
    • C02F2209/15—N03-N
    • 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

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  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
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  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

The invention relates to the technical field of sewage treatment, and particularly discloses a system and a method for enhancing denitrification and dephosphorization of sewage with a low carbon-nitrogen ratio. The invention provides a system for enhancing nitrogen and phosphorus removal of low carbon nitrogen ratio sewage, which comprises a water inlet tank, a first stage SBBR reactor, a first intermediate tank, a second stage SBBR reactor, a second intermediate tank, an anaerobic ammonia oxidation phosphorus removal reactor and a water outlet tank; the anaerobic ammonia oxidation dephosphorization reactor is provided with a reaction outer chamber and a reaction inner chamber. In the invention, anaerobic phosphorus release reaction, whole-course nitrification and first-stage aerobic phosphorus removal reaction occur in the first-stage SBBR, and raw sewage is added in the stage of endogenous short-range denitrification reaction of the second-stage SBBR without supplementing exogenous organic matters; an anaerobic ammonia oxidation denitrification reaction occurs in the reaction outer chamber, and a secondary aerobic phosphorus removal reaction occurs in the reaction inner chamber, so that the technical problem that the endogenous short-range denitrification coupling anaerobic ammonia oxidation process does not have phosphorus removal capability is solved.

Description

System and method for enhancing denitrification and dephosphorization of sewage with low carbon-nitrogen ratio
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a system and a method for enhancing denitrification and dephosphorization of sewage with a low carbon-nitrogen ratio.
Background
Biological denitrification of sewage is mainly realized by performing nitrification and denitrification reactions through anoxic/aerobic processes, such as an AO method, an A2O method and the like, and ammonia nitrogen NH in the wastewater is removed based on the nitrification-denitrification process principle 4 + -N. Biological phosphorus removal is realized mainly by anaerobic/aerobic phosphorus release and phosphorus absorption reactions. With the improvement of living standard and the change of living style, urban life is producedThe carbon-nitrogen ratio (C/N) of the living sewage is gradually reduced, and the carbon source competition exists in the denitrification and dephosphorization, so that the biological sewage treatment is unstable due to the limited carbon source, and the nitrogen and phosphorus removal is incomplete. In the actual running process of domestic sewage treatment plants, external carbon sources are generally added to improve the carbon nitrogen ratio of the inlet water, so that the denitrification efficiency is improved, the defects are that the energy consumption and the cost of sewage treatment are increased, and a large amount of excess sludge can be generated.
Anaerobic ammoxidation (Anaerobic ammonia oxidation, anamox) as a novel biological denitrification technique can be carried out by anaerobic ammoxidation bacteria (AnAOB) under the condition of NO organic carbon source and anaerobic condition to obtain nitrite nitrogen NO 2 - Direct NH-N as electron acceptor 4 + Conversion of-N to N 2 And a small amount of NO 3 - N has the advantages of energy consumption saving of aeration, low organic carbon source and sludge yield, high denitrification load and the like. However, the radical NO required for the anaerobic ammoxidation reaction is currently 2 - The stable acquisition of N is still a short plate limiting its popularization and application.
Research shows that the endogenous short-cut denitrification (EPD) coupled anaerobic ammonia oxidation process can provide stable NO for the anaerobic ammonia oxidation process 2 - -N matrix source to increase the denitrification efficiency of the system sewage. However, because NO needs to be added in the anoxic reaction stage in the endogenous short-cut denitrification process 3 - N (its source is NO-containing) 3 - -N wastewater) is used as a reaction matrix, and meanwhile, the endogenous short-cut denitrification coupling anaerobic ammonia oxidation process does not have the phosphorus removal capability, so that the application of the endogenous short-cut denitrification coupling anaerobic ammonia oxidation process in sewage denitrification and phosphorus removal is limited.
Disclosure of Invention
Aiming at the problems, the invention provides a system and a method for enhancing nitrogen and phosphorus removal of sewage with a low carbon-nitrogen ratio.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a system for enhancing nitrogen and phosphorus removal of sewage with low carbon nitrogen ratio comprises a water inlet tank, a first stage SBBR reactor, a first intermediate tank, a second stage SBBR reactor, a second intermediate tank, an anaerobic ammonia oxidation phosphorus removal reactor and a water outlet tank; wherein,
the primary SBBR reactor is connected with the water inlet tank and is used for carrying out primary anaerobic phosphorus release reaction, whole-course nitrification and primary aerobic phosphorus removal reaction;
The first intermediate water tank is connected with the first stage SBBR reactor and is used for receiving the sewage which is exported after being treated by the first stage SBBR reactor;
the second-level SBBR reactor is connected with the water inlet tank and the first intermediate tank, and is used for carrying out endogenous carbon storage and second-level anaerobic phosphorus release reaction on the sewage led in by the water inlet tank and then carrying out endogenous short-cut denitrification reaction on the sewage led in by the first intermediate tank;
the second intermediate water tank is connected with the second-level SBBR reactor and is used for receiving the sewage which is exported after being treated by the second-level SBBR reactor;
the anaerobic ammonia oxidation dephosphorization reactor is provided with a reaction outer chamber connected with the second middle water tank and a reaction inner chamber which is positioned in the reaction outer chamber and is communicated with the reaction outer chamber; the reaction outer chamber is used for carrying out anaerobic ammonia oxidation denitrification reaction on the sewage led in by the second intermediate water tank; the reaction inner chamber is used for carrying out a secondary aerobic dephosphorization reaction on the sewage led in by the reaction outer chamber;
the water outlet pool is connected with the reaction inner chamber and is used for receiving the discharged water with the water quality reaching the standard after being treated in the reaction inner chamber.
Compared with the prior art, the system for enhancing nitrogen and phosphorus removal of the sewage with low carbon nitrogen ratio provided by the invention uses inorganic nitrogen as a nitrogen source to carry out NH (NH) under the aerobic state through the whole-course nitrification and the first-stage aerobic phosphorus removal reaction of the first-stage SBBR reactor 4 + Oxidation to NO 3 - Nitrate rate (NO) 3 - -N/NO x - -N) exceeds 95% to provide stable and sufficient NO for endogenous short-range denitrification 3 - Source without adding NO again 3 - -N, simultaneously achieving primary aerobic removal of phosphorus; endogenous short in a secondary SBBR reactorIn the stage of the partial denitrification reaction, raw sewage is added, under the anaerobic condition, organic matters in the raw sewage are utilized to store Polyhydroxyalkanoates (PHAs) of internal carbon sources, under the anoxic condition, the anaerobic denitrification bacteria utilize the PHAs stored under the anaerobic condition to discharge NO in the effluent of the first-stage SBBR reactor 3 - Conversion to NO 2 - Exogenous organic matters are not required to be supplemented; anaerobic ammonia oxidation denitrification and secondary aerobic dephosphorization reaction stage of anaerobic ammonia oxidation dephosphorization reactor, under anaerobic condition, anaerobic ammonia oxidation bacteria can make NO 2 - 、NH 4 + Conversion to N 2 The nitrogen is removed, and simultaneously, phosphorus in the raw sewage entering the secondary SBBR and phosphorus which is not removed by the primary SBBR are subjected to aerobic removal again, so that the technical problem that the EPD coupling Anamox process does not have the phosphorus removal capability is solved.
In one possible implementation, the primary SBBR reactor comprises a first body, a first agitator, a first filler support, and a first nanopore aeration disc; wherein,
the first body is provided with a first inner cavity communicated with the water inlet pool and the first middle pool;
the first stirrer is arranged on the first stirrer body and extends into the first inner cavity;
the first filler brackets are arranged in the first inner cavity and positioned at the outer side of the first stirrer, and are provided with a plurality of first vertical brackets arranged along the vertical direction;
the first nano microporous aeration disc is arranged at the bottom end of the first inner cavity and is used for introducing air into the first inner cavity.
In one possible implementation manner, the first vertical support is uniformly provided with first biological fillers for attaching microorganisms in the sludge and the sewage; the volume filling ratio of the first biological filler is 35% -45%.
In one possible implementation, the primary SBBR reactor further comprises a first nitrite nitrogen analyzer, a first nitrate nitrogen analyzer, a first phosphate analyzer, a first total phosphorus analyzer, and a first DO analyzer.
In one possible implementation, the secondary SBBR reactor comprises a second body, a second stirrer, and a second packing support; wherein,
the second body is provided with a second inner cavity communicated with the water inlet tank, the first middle water tank and the second middle water tank;
the second stirrer is arranged on the second stirrer body and extends into the second inner cavity;
the second filler support is arranged in the second inner cavity and positioned at the outer side of the second stirrer, and is provided with a plurality of second vertical supports arranged along the vertical direction.
In one possible implementation manner, second biological fillers are uniformly distributed on the second vertical support and used for attaching microorganisms in the sludge and the sewage; the volume filling ratio of the second biological filler is 40% -50%.
In one possible implementation, the secondary SBBR reactor further comprises a first ammonia nitrogen analyzer, a second nitrite nitrogen analyzer, a second nitrate nitrogen analyzer, a second phosphate analyzer, a second total phosphorus analyzer, and a second DO analyzer.
In one possible implementation, the anaerobic ammoxidation dephosphorization reactor comprises an outer cylinder, an inner cylinder, a submerged impeller, a porous suspension ball biological filler and a second nano-microporous aeration disc; wherein,
The inner cylinder body is arranged in the cylinder cavity of the outer cylinder body, the cylinder cavity of the inner cylinder body is the reaction inner chamber, and the reaction outer chamber is formed between the inner cylinder body and the outer cylinder body; an overflow port communicated with the reaction outer chamber is arranged at the top of the side wall of the inner cylinder body;
the diving impeller is positioned on the side wall of the outer cylinder body and is used for pushing sewage and porous suspension ball biological filler in the reaction outer chamber to be uniformly distributed;
the porous suspension ball biological filler is arranged in the reaction outer chamber and is used for attaching microorganisms in sludge and sewage, and the volume filling ratio is 35% -45%;
the second nano microporous aeration disc is positioned at the bottom of the cylinder cavity of the inner cylinder body and is used for introducing air into the reaction inner chamber;
the top of the reaction outer chamber is provided with an exhaust port for discharging nitrogen generated by the anaerobic ammonia oxidation denitrification reaction.
In one possible implementation, the anaerobic ammonia oxidation phosphorus removal reactor further includes a second ammonia nitrogen analyzer, a third nitrite nitrogen analyzer, a total nitrogen analyzer, a third DO analyzer, and a third total phosphorus analyzer; wherein,
probes of the second ammonia nitrogen analyzer, the third nitrite nitrogen analyzer and the total nitrogen analyzer are inserted into the reaction outer chamber;
The probe of the third total phosphorus analyzer is inserted into the reaction inner chamber;
the third DO analyzer is provided with two sets of probes, one set of probes being inserted into the reaction outer chamber and the other set of probes being inserted into the reaction inner chamber.
The invention also provides a method for enhancing nitrogen and phosphorus removal of the sewage with low carbon-nitrogen ratio, which adopts the system for enhancing nitrogen and phosphorus removal of the sewage with low carbon-nitrogen ratio and comprises the following steps:
s1, a preparation stage:
s11, inoculating the residual sludge of the secondary sedimentation tank of the sewage treatment plant of the A/O process into the primary SBBR reactor, so that the sludge concentration in the primary SBBR reactor is 3000-4000 mg/L;
s12, inoculating the domesticated high-concentration NO in a secondary SBBR reactor 2 - The denitrification sludge of the N ensures that the sludge concentration in the secondary SBBR reactor is 3000-4000 mg/L;
s13, placing porous suspended ball biological filler loaded with anaerobic ammonia oxidation microorganisms in a reaction outer chamber of the anaerobic ammonia oxidation phosphorus removal reactor;
s14, inoculating the residual sludge of a secondary sedimentation tank of an A/O process sewage treatment plant into a reaction inner chamber of an anaerobic ammonia oxidation dephosphorization reactor, so that the sludge concentration in the reaction inner chamber is 3000-350 mg/L;
s2, a full-process nitrification and primary aerobic dephosphorization reaction stage:
S21, anaerobic phase: adding sewage in a water inlet tank into a primary SBBR reactor, stirring, performing primary anaerobic phosphorus release reaction, and reacting as PO 4 3- -P/TP exceeds 95%, controlling the end of the reaction;
s22, an aerobic stage: introducing air into the primary SBBR reactor to ensure that the DO concentration is 2.0-4.0 mg/L, stirring, performing full-course nitrification and primary aerobic dephosphorization reaction, and reacting as NO 3 - -N/NO x - The concentration of the-N exceeds 95 percent, the concentration of the TP is lower than 0.5mg/L, and the reaction is controlled to be ended, thus obtaining high concentration NO 3 - -N sewage;
s23, precipitation drainage stage: subjecting the high concentration NO to 3 - Depositing the sewage of the N for 30-60 min, and discharging the sewage into a first intermediate water tank for storage;
s3, endogenous carbon storage and short-range denitrification stages:
s31, anaerobic phase: adding sewage in a water inlet tank into a secondary SBBR reactor, stirring, carrying out endogenous carbon storage and secondary anaerobic phosphorus release reaction, and obtaining the product when PO (potential of hydrogen) is obtained, wherein the volume of the sewage is 1/3-2/3 of the volume of the secondary SBBR reactor 4 3- -P/TP exceeds 95%, controlling the end of the reaction;
s32, anoxic stage: adding the sewage in the first intermediate water tank into a secondary SBBR reactor, wherein the water inlet volume is the volume of the secondary SBBR reactor, stirring, carrying out endogenous short-range denitrification reaction, and when NO 2 - -N/NO x - -N exceeds 95%, and NO 2 - -N/NH 4 + -N is 1.1-1.5, and the reaction is controlled to be finished;
S33, precipitation drainage stage: precipitating the water treated by the secondary SBBR for 30-60 min, and discharging the water into a second intermediate water tank for storage;
s4, anaerobic ammoxidation and secondary aerobic dephosphorization stages:
s41, anaerobic phase: adding the sewage in the second intermediate water tank into the reaction outer chamber of the anaerobic ammonia oxidation dephosphorization reactor, stirring, performing anaerobic ammonia oxidation denitrification reaction, and when NH 4 + -N and NO 2 - N concentrations of 0mgControlling the reaction to be ended, wherein the concentration of TN is below 15mg/L, and sewage in the reaction outer chamber flows into the reaction inner chamber;
s43, an aerobic stage: introducing air into the reaction inner chamber to ensure that the DO concentration is 3-5 mg/L, stirring, performing a secondary aerobic dephosphorization reaction, and controlling the reaction to be ended when the TP concentration is below 0.5 mg/L;
s44, sediment drainage stage: and (3) precipitating water in the reaction inner chamber for 30-60 min, and discharging the water into a water discharge tank to obtain the water which can be discharged and has the water quality reaching the standard.
It should be noted that, step S31 and step S2 are not sequential, step S31 may be performed after step S2 is completed, and step S31 may be performed simultaneously with step S2 in order to increase the efficiency of wastewater treatment. In all anaerobic phases (steps S21, S31 and S41) of the invention, DO concentration is below 0.02 mg/L; in the anoxic stage (step S32), DO concentration is 0.03-0.05 mg/L. In the present invention, PO 4 3- -P/TP、NO 3 - -N/NO x - -N、NO 2 - -N/NO x - -N and NO 2 - -N/NH 4 + N represents the respective concentration ratio in the wastewater.
The method for enhancing nitrogen and phosphorus removal of the low-carbon-nitrogen-ratio sewage is suitable for treating the domestic sewage with low carbon-nitrogen ratio, has no requirement on the specific water quality condition of water inflow, and can meet the requirement of the domestic sewage on being discharged after being treated by the method for enhancing nitrogen and phosphorus removal of the low-carbon-nitrogen-ratio sewage.
In the step S2, a first-stage anaerobic phosphorus release reaction is carried out in An anaerobic (An) stage; in the aerobic (O) stage, inorganic nitrogen is used as a nitrogen source to carry out the whole-course nitration reaction, NH is carried out 4 + Oxidation to NO 3 - Nitrate rate (NO) 3 - -N/NO x - -N) reaches a certain value to provide stable and sufficient NO for endogenous short-range denitrification 3 - Source without adding NO again 3 - N, while achieving primary aerobic removal of phosphorus. In step S3, in the anaerobic (An) stage, the organic matters in the raw sewage are used for storing (innerSource carbon storage) and simultaneously carrying out a secondary anaerobic phosphorus release reaction; in the anoxic (A) stage, the anaerobic denitrifying bacteria utilizes PHAs stored under anaerobic conditions to carry out endogenous short-cut denitrification reaction, so that NO in the effluent of the primary SBBR reactor 3 - Conversion to NO 2 - No need of supplementing exogenous organic matters. In step S4, in the anaerobic (An) stage (in the reaction chamber), anaerobic ammonia oxidation and denitrification reaction is performed by anaerobic ammonia oxidizing bacteria, whereby NO is removed 2 - And NH 4 + Conversion to N 2 The Nitrogen (TN) is removed; in the aerobic (O) stage, phosphorus in the raw sewage entering the secondary SBBR reactor and phosphorus which is not removed by the primary SBBR reactor are subjected to aerobic removal again, so that the Total Phosphorus (TP) concentration is greatly reduced, and the technical problem that the EPD coupling Anamox process does not have the phosphorus removal capability is solved.
For example, in step S12, the acclimation method of the denitrified sludge includes the following steps:
80.1mg of citric acid and 17.1mg of KH were added to 1L of the wastewater 2 PO 4 、21.2mg NaNO 3 Controlling COD of the solution Cr The mass concentration of (2) is 300mg/L, and the pH value of the solution is regulated to be pH=7 by the reinforcement NaOH;
the inoculated sludge is taken from the residual sludge of a secondary sedimentation tank of a town sewage treatment plant, the operation mode is that water inflow is 0.5h, anoxic is 5.0h, sedimentation is 2.0h, water outflow is 0.5h, the operation period is 8h, and the total operation period is 30.
Drawings
FIG. 1 is a schematic diagram of a system for enhanced nitrogen and phosphorus removal of low carbon-nitrogen ratio wastewater provided by an embodiment of the invention;
reference numerals illustrate:
1, a water inlet pool;
a 2-stage SBBR reactor; 201 a first peristaltic pump; 202 a first drain solenoid valve; 203 first control means; 204 a first body; 2041 a first lumen; 205 a first stirrer; 206 a first filler holder; 2061 a first vertical support; 2062 a first upper circular support; 2063 a first lower circular bracket; 2064 a first biological filler; 207 a first nano-microporous aeration disc; 208 a first gas flow meter; 209 a first aeration device; a first nitrite nitrogen analyzer 210; 211 a first nitrate nitrogen analyzer; 212 a first phosphate analyzer; 213 first total phosphorus analyzer; 214 a first DO analyzer;
3, a first middle pool;
a 4-stage SBBR reactor; 401 a second peristaltic pump; 402 a third peristaltic pump; 403 a second drain solenoid valve; a second control 404; 405 a second body; 4051 a second lumen; 406 a second stirrer; 407 a second filler holder; 4071 a second vertical support; 4072 a second upper circular support; 4073 a second lower circular support; 4074 a second biological filler; 408 a first ammonia nitrogen analyzer; 409 second nitrite nitrogen analyzer; a second nitrate nitrogen analyzer 410; 411 second phosphate analyzer; a second total phosphorus analyzer 412; 413 a second DO analyzer;
5 a second intermediate pool;
6 an anaerobic ammonia oxidation dephosphorization reactor; 601 an outer reaction chamber; 602 a reaction chamber; 603 a fourth peristaltic pump; 604 a third drain solenoid valve; 605 third control means; 606 outer cylinder; 607 an inner cylinder; 608 overflow port; 609 submersible impeller; 610 porous suspended ball biological filler; 611 a second nano-microporous aeration disc; 612 exhaust port; 613 a second gas flow meter; 614 a second aeration device; 615 a second ammonia nitrogen analyzer; 616 a third nitrite nitrogen analyzer; 617 total nitrogen analyzer; 618 a third DO analyzer; 619 a third total phosphorus analyzer;
7, discharging the water from the water tank.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, a system for enhancing nitrogen and phosphorus removal of sewage with low carbon nitrogen ratio comprises a water inlet tank 1, a first stage SBBR reactor 2, a first intermediate tank 3, a second stage SBBR reactor 4, a second intermediate tank 5, an anaerobic ammonia oxidation phosphorus removal reactor 6 and a water outlet tank 7; wherein,
the primary SBBR reactor 2 is connected with the water inlet tank 1 through a water inlet pipeline provided with a first peristaltic pump 201 and is used for carrying out primary anaerobic phosphorus release reaction, whole-course nitrification and primary aerobic phosphorus removal reaction;
the first intermediate water tank 3 is connected with the first stage SBBR reactor 2 through a water outlet pipeline provided with a first water discharge electromagnetic valve 202 and is used for receiving the sewage which is led out after being treated by the first stage SBBR reactor;
the second-stage SBBR reactor 4 is connected with the water inlet tank 1 through a water inlet pipeline provided with a second peristaltic pump 401 and is connected with the first intermediate water tank 3 through a water inlet pipeline provided with a third peristaltic pump 402, and the second-stage SBBR reactor 4 is used for carrying out endogenous carbon storage and second-stage anaerobic phosphorus release reaction on the sewage led in by the water inlet tank 1 and then carrying out endogenous short-range denitrification reaction on the sewage led in by the first intermediate water tank 3;
The second intermediate water tank 5 is connected with the second-level SBBR reactor 4 through a water outlet pipeline provided with a second water outlet electromagnetic valve 403 and is used for receiving the sewage which is led out after being treated by the second-level SBBR reactor 4;
the anaerobic ammonia oxidation dephosphorization reactor 6 comprises a reaction outer chamber 601 connected with the second middle water tank 5 through a water inlet pipeline provided with a fourth peristaltic pump 603 and a reaction inner chamber 602 which is positioned inside the reaction outer chamber 601 and is communicated with the reaction outer chamber 601; the reaction outer chamber 601 is used for performing anaerobic ammonia oxidation denitrification reaction on the sewage introduced from the second intermediate water tank 5; the reaction inner chamber 602 is used for performing a secondary aerobic dephosphorization reaction on the sewage introduced from the reaction outer chamber 601;
the water outlet tank 7 is connected with the reaction inner chamber 602 through a water outlet pipeline provided with a third water outlet electromagnetic valve 604 and is used for receiving the water which can be discharged and has the water quality reaching the standard after being treated by the reaction inner chamber 602.
In this embodiment, the first peristaltic pump 201 and the first drain solenoid valve 202 are electrically connected to the first control device 203, the second peristaltic pump 401, the third peristaltic pump 402 and the second drain solenoid valve 403 are electrically connected to the second control device 404, and the fourth peristaltic pump 603 and the third drain solenoid valve 604 are electrically connected to the third control device 605.
The system for enhanced nitrogen and phosphorus removal of sewage with low carbon nitrogen ratio provided by the embodiment has the following working principle:
Anaerobic/aerobic first stage SBBR reactorThe oxygen (An/O) process carries out primary anaerobic phosphorus release reaction, whole-course nitrification and primary aerobic phosphorus removal reaction. Performing a first-stage anaerobic phosphorus release reaction in An anaerobic (An) stage; in the aerobic (O) stage, inorganic nitrogen is used as a nitrogen source to carry out the whole-course nitration reaction, NH is carried out 4 + Oxidation to NO 3 - Nitrate rate (NO) 3 - -N/NO x - -N) reaches a certain value to provide stable and sufficient NO for endogenous short-range denitrification 3 - Source without adding NO again 3 - N, while achieving primary aerobic removal of phosphorus.
The secondary SBBR reactor adopts An anaerobic/anoxic (An/A) process to store endogenous carbon, perform a secondary anaerobic phosphorus release reaction and perform An endogenous short-range denitrification reaction. In the anaerobic (An) stage, utilizing organic matters in the raw sewage to store Polyhydroxyalkanoates (PHAs) as internal carbon sources (endogenous carbon storage) and simultaneously carrying out a secondary anaerobic phosphorus release reaction; in the anoxic (A) stage, the anaerobic denitrifying bacteria utilizes PHAs stored under anaerobic conditions to carry out endogenous short-cut denitrification reaction, so that NO in the effluent of the primary SBBR reactor 3 - Conversion to NO 2 - No need of supplementing exogenous organic matters.
The anaerobic ammonia oxidation dephosphorization reactor adopts An anaerobic/aerobic (An/O) process to carry out anaerobic ammonia oxidation denitrification reaction and secondary aerobic dephosphorization reaction. In the anaerobic (An) stage (outside reaction chamber), anaerobic ammonia oxidation denitrification reaction is performed by anaerobic ammonia oxidizing bacteria, and NO is removed 2 - And NH 4 + Conversion to N 2 The Nitrogen (TN) is removed; in the aerobic (O) stage, phosphorus in the raw sewage entering the secondary SBBR reactor and phosphorus which is not removed by the primary SBBR reactor are subjected to aerobic removal again, so that the Total Phosphorus (TP) concentration is greatly reduced, and the technical problem that the EPD coupling Anamox process does not have the phosphorus removal capability is solved.
In some embodiments, the above-described primary SBBR reactor 2 may be configured as shown in fig. 1. Referring to fig. 1, the primary SBBR reactor 2 comprises a first body 204, a first agitator 205, a first packing support 206 and a first nano-microporous aeration disc 207; wherein,
a first body 204 having a first inner cavity 2041 communicating with the intake pool 1 and the first intermediate pool 3; the first body 204 may include a barrel and two end caps;
a first agitator 205 disposed on the first body 204 and extending into the first interior cavity 2041;
a first filler support 206 disposed in the first inner cavity 2041 and outside the first agitator 205, having a plurality of first vertical supports 2061 disposed along a vertical direction;
a first nano-microporous aeration disc 207 is disposed at the bottom end of the first inner cavity 2041 for introducing air into the first inner cavity 2041.
In this embodiment, the first nano-microporous aeration disc 207 is communicated with the first aeration device 209 through an aeration pipe provided with a first gas flow meter 208; the first agitator 205 and the first aeration device 209 are electrically connected to the first control device 203. The first stirrer 205 is arranged in the invention, so that the sludge and sewage in the first-stage SBBR reactor 2 can be uniformly mixed, and microorganisms can be better attached to the first biological filler 2064; a first nano-microporous aeration disc 207 is provided for introducing air into the first interior cavity 2041 to provide the oxygen content required for the full range nitrification and primary aerobic dephosphorization reaction.
In some embodiments, the first vertical support 2061 may be configured as shown in FIG. 1. Referring to fig. 1, first biological fillers 2064 for attaching microorganisms in sludge and sewage are uniformly distributed on the first vertical supports 2061; the volume filling ratio of the first biological filler 2064 is 35% -45%.
In this embodiment, regarding the first packing support 206, the first upper end circular support 2062 and the first lower end circular support 2063 may be included, where the first upper end circular support 2062 and the first lower end circular support 2063 have the same diameter, and are placed in parallel with each other and have the same center; the first vertical supports 2061 are vertically and evenly distributed between the first upper circular support 2062 and the first lower circular support 2063; the first vertical support 2061 is vertically disposed, and the first upper circular support 2062 and the first lower circular support 2063 are horizontally disposed; the first biologic filler 2064 may be secured to the first vertical support 2061 by nylon ropes.
According to the invention, the first biological filler 2064 is arranged on the first filler bracket 206 in such a way, so that the first biological filler 2064 can be distributed more uniformly, and further, microorganisms attached to the biological filler can perform anaerobic and aerobic reactions better, thereby improving the sewage treatment efficiency; defining the volumetric filling ratio of the first biofilm 2064 may provide sufficient propagation space for microorganisms adhering to the first biofilm 2064, thereby facilitating anaerobic and aerobic reactions and improving the efficiency of wastewater treatment.
The present invention does not require the composition of the first biofilm pack 2064, and commercially available biofilm packs can be used. In the present invention, the first biological filler 2064 is uniformly distributed in the first cavity 2041 as much as possible, and there is no requirement for a specific distance, and the volume filling ratio of the first biological filler 2064 is satisfied.
In some embodiments, the above-described primary SBBR reactor 2 may be configured as shown in fig. 1. Referring to fig. 1, the primary SBBR reactor 2 further includes a first nitrite nitrogen analyzer 210, a first nitrate nitrogen analyzer 211, a first phosphate analyzer 212, a first total phosphorus analyzer 213, and a first DO analyzer 214;
the probes of the first nitrite nitrogen analyzer 210, the first nitrate nitrogen analyzer 211, the first phosphate analyzer 212, the first total phosphorus analyzer 213, and the first DO analyzer 214 are inserted into the first lumen 2041 and electrically connected to the first control device 203.
In some embodiments, the above-described secondary SBBR reactor 4 may be configured as shown in fig. 1. Referring to fig. 1, the secondary SBBR reactor 4 comprises a second body 405, a second stirrer 406 and a second packing support 407; wherein,
a second body 405 having a second interior cavity 4051 in communication with the intake basin 1, the first intermediate basin 3, and the second intermediate basin 5; the second body 405 may include a barrel and two end caps;
a second stirrer 406 disposed on the second body 405 and extending into the second inner cavity 4051;
the second filler support 407 is disposed in the second inner cavity 4051 and located outside the second stirrer 406, and has a plurality of second vertical supports 4071 disposed along the vertical direction.
In this embodiment, the second agitator 406 is electrically connected to the second control device 404. The present invention provides the second stirrer 406 to uniformly mix the sludge and sewage in the second SBBR reactor 4, so that the microorganism can be better attached to the second bio-filler 4074.
In some embodiments, the second vertical support 4071 may be configured as shown in fig. 1. Referring to fig. 1, second biological fillers 4074 are uniformly distributed on the second vertical support 4071 and used for attaching microorganisms in the sludge and the sewage; the volume filling ratio of the second biological filler 4074 is 40% -50%.
In this embodiment, regarding the second packing support 407, the second packing support may include a second upper end circular support 4072 and a second lower end circular support 4073, where the second upper end circular support 4072 and the second lower end circular support 4073 have the same diameter, and are placed in parallel and have the center of circles coincident; the second vertical supports 4071 are vertically and uniformly distributed between the second upper end circular support 4072 and the second lower end circular support 4073; the second vertical support 4071 is vertically placed, and the second upper end circular support 4072 and the second lower end circular support 4073 are horizontally placed; the second biological filler 4074 may be secured to the second vertical support 4071 by nylon rope.
The second biological filler 4074 is arranged on the second filler bracket 407 in the invention, so that the second biological filler 4074 can be distributed more uniformly, further, the microorganisms attached to the biological filler can perform anaerobic and anoxic reactions better, and the sewage treatment efficiency is improved; the volume filling ratio of the second biological filler 4074 is limited, so that sufficient propagation space can be provided for microorganisms attached to the second biological filler 4074, anaerobic and anoxic reaction can be facilitated, and the sewage treatment efficiency is improved.
The invention does not require the components of the second biological filler 4074, and adopts the commercial biological filler. In the present invention, the second bio-filler 4074 is uniformly distributed in the second inner cavity 4051 as much as possible, and no specific space is required, so that the volume filling ratio of the second bio-filler 4074 is satisfied.
In some embodiments, the above-described secondary SBBR reactor 4 may be configured as shown in fig. 1. Referring to fig. 1, the secondary SBBR reactor 4 further includes a first ammonia nitrogen analyzer 408, a second nitrite nitrogen analyzer 409, a second nitrate nitrogen analyzer 410, a second phosphate analyzer 411, a second total phosphorus analyzer 412, and a second DO analyzer 413;
the probes of the first ammonia nitrogen analyzer 408, the second nitrite nitrogen analyzer 409, the second nitrate nitrogen analyzer 410, the second phosphate analyzer 411, the second total phosphorus analyzer 412, and the second DO analyzer 413 are inserted into the second inner cavity 4051, and are electrically connected with the second control device 404.
In some embodiments, the anaerobic ammonium oxidation phosphorus removal reactor 6 may be configured as shown in fig. 1. Referring to fig. 1, the anaerobic ammoxidation dephosphorization reactor 6 comprises an outer cylinder 606, an inner cylinder 607, a submerged impeller 609, a porous suspended ball biological filler 610 and a second nano microporous aeration disk 611; wherein,
the inner cylinder 607 is arranged in the cylinder cavity of the outer cylinder 606, the cylinder cavity of the inner cylinder 607 is a reaction inner chamber 602, and a reaction outer chamber 601 is formed between the inner cylinder 607 and the outer cylinder 606; the top of the side wall of the inner cylinder 607 is provided with an overflow port 608 communicated with the reaction outer chamber 601; regarding the outer cylinder 606, the outer cylinder 606 may include a cylinder and two end caps, the inner cylinder 607 is located inside the outer cylinder 606, and two ends are respectively connected with the two end caps;
The submerged impeller 609 is positioned on the side wall of the outer cylinder 606 and is used for pushing the sewage in the reaction outer chamber 601 and the porous suspended ball biological filler 610 to be evenly distributed;
the porous suspension ball biological filler 610 is arranged in the reaction outer chamber 601 and is used for attaching microorganisms in sludge and sewage, and the volume filling ratio is 35% -45%;
the second nano microporous aeration disc 611 is positioned at the bottom of the barrel cavity of the inner barrel 607 and is used for introducing air into the reaction inner chamber 602;
wherein, the top of the reaction outer chamber 601 is provided with an exhaust port 612 for exhausting nitrogen generated by the anaerobic ammonia oxidation denitrification reaction.
In this embodiment, the particle size of the porous suspended ball bio-filler 610 is larger than the diameter of the overflow port 608, so that the porous suspended ball bio-filler 610 is not carried into the reaction chamber 602 by water flow and does not block the overflow port 608 during sewage treatment. The second nano-microporous aeration disc 611 is communicated with a second aeration device 614 through an aeration pipeline provided with a second gas flowmeter 613; the submersible propeller 609 and the second aeration device 614 are electrically connected to the third control device 605.
The invention is provided with the submerged impeller 609, so that the sludge and sewage in the reaction outer chamber 601 can be uniformly mixed, and microorganisms can be better attached to the porous suspended ball biological filler 610; a second nano-microporous aeration disc 611 is provided for introducing air into the reaction chamber 602 to provide the oxygen content required for the secondary aerobic dephosphorization reaction.
In some embodiments, the anaerobic ammonium oxidation phosphorus removal reactor 6 may be configured as shown in fig. 1. Referring to fig. 1, anaerobic ammonia oxidation phosphorus removal reactor 6 further includes a second ammonia nitrogen analyzer 615, a third nitrite nitrogen analyzer 616, a total nitrogen analyzer 617, a third DO analyzer 618, and a third total phosphorus analyzer 619; wherein,
probes of the second ammonia nitrogen analyzer 615, the third nitrite nitrogen analyzer 616 and the total nitrogen analyzer 617 are inserted into the reaction outer chamber 601 and are electrically connected with the third control device 605;
the probe of the third total phosphorus analyzer 619 is inserted into the reaction chamber 602 and is electrically connected to the third control device 605;
the third DO analyzer 618 is provided with two sets of probes, one set of probes being inserted into the reaction outer-chamber 601 and the other set of probes being inserted into the reaction inner-chamber 602 and electrically connected to the third control device 605.
In the present invention, the first nitrite nitrogen analyzer 210, the second nitrite nitrogen analyzer 409 and the third nitrite nitrogen analyzer 616 are used for monitoring the concentration of nitrite nitrogen in the corresponding sewage, the first nitrate nitrogen analyzer 211 and the second nitrate nitrogen analyzer 410 are used for monitoring the concentration of nitrate nitrogen in the corresponding sewage, the total nitrogen analyzer 617 is used for monitoring the concentration of total nitrogen in the corresponding sewage, the first phosphate analyzer 212 and the second phosphate analyzer 411 are used for monitoring the concentration of phosphate in the corresponding sewage, and the first ammonia nitrogen analyzer 408 and the second ammonia nitrogen analyzer 615 are used for monitoring the concentration of ammonia nitrogen in the corresponding sewage The first total phosphorus analyzer 213, the second total phosphorus analyzer 412, and the third total phosphorus analyzer 619 are used to monitor the concentration of total phosphorus in the corresponding wastewater, and the first DO analyzer 214, the second DO analyzer 413, and the third DO analyzer 618 are used to monitor the concentration of dissolved oxygen in the corresponding wastewater. The invention adopts on-line analysis of NO under the system 2 - -N、NO 3 - -N、NH 4 + -N, TN, TP and PO 4 3- And the P concentration is changed, and the reaction process is controlled in real time by utilizing the control device according to the data change trend, so that the running cost of sewage treatment is reduced.
Example 1
The embodiment provides a method for enhancing nitrogen and phosphorus removal of sewage with low carbon nitrogen ratio, and the water quality of inlet water is as follows: NH (NH) 4 + -N70 mg/L, BOD 400mg/L, TN mg/L, TP mg/L, intake BOD/tn=4. Adopt low carbon nitrogen ratio sewage to strengthen system of denitrification and dephosphorization, specific steps are as follows:
s1, a preparation stage:
s10, domesticating the denitrified sludge, wherein the domesticating method comprises the following steps of:
80.1mg of citric acid and 17.1mg of KH were added to 1L of the wastewater 2 PO 4 、21.2mg NaNO 3 Controlling COD of the solution Cr The mass concentration of (2) is 300mg/L, and the pH value of the solution is regulated to be pH=7 by the reinforcement NaOH;
the inoculated sludge is taken from the residual sludge of a secondary sedimentation tank of a town sewage treatment plant, the operation mode is that water inflow is 0.5h, anoxic is 5.0h, sedimentation is 2.0h, water outflow is 0.5h, the operation period is 8h, and the total operation period is 30.
S11, inoculating the residual sludge of the secondary sedimentation tank of the sewage treatment plant of the A/O process into the primary SBBR reactor 2, so that the sludge concentration in the primary SBBR reactor is 3500mg/L;
s12, inoculating the domesticated high-concentration NO in the secondary SBBR reactor 4 2 - The denitrification sludge of the N ensures that the sludge concentration in the secondary SBBR reactor is 3500mg/L;
s13, placing porous suspended ball biological filler 610 loaded with anaerobic ammonia oxidation microorganisms in a reaction outer chamber 601 of the anaerobic ammonia oxidation phosphorus removal reactor 6;
s14, inoculating the residual sludge of the secondary sedimentation tank of the sewage treatment plant of the A/O process into the reaction inner chamber 602 of the anaerobic ammonia oxidation dephosphorization reactor 6, so that the sludge concentration in the reaction inner chamber is 3200mg/L.
S2, a full-process nitrification and primary aerobic dephosphorization reaction stage:
s21, water inlet stage: starting a first peristaltic pump 201 through a first control device 203 at the beginning of each reaction period, adding sewage in a water inlet tank 1 into a first-stage SBBR reactor 2, closing the first peristaltic pump 201 through the first control device 203, ending water inlet, and entering the next stage;
s22, anaerobic phase: the first stirrer 205, the first phosphate analyzer 212, the first total phosphorus analyzer 213 and the first DO analyzer 214 are turned on by the first control device 203, the DO concentration is 0.017mg/L, the first-stage anaerobic phosphorus release reaction is performed, and when the phosphorus release rate PO is reached 4 3- -P/TP is 97%, controlling the end of the reaction, entering the next stage;
s23, an aerobic stage: the first aeration device 209, the first nitrite nitrogen analyzer 210 and the first nitrate nitrogen analyzer 211 are started through the first control device 203, DO concentration is controlled to be 3.0mg/L through the first nano microporous aeration disc 207, the whole-course nitrification and the primary aerobic dephosphorization reaction are carried out, and when the nitrate rate NO 3 - -N/NO x - The concentration of the-N is 97 percent, the concentration of the TP is 0.4mg/L, and the reaction is controlled to be ended, thus obtaining high concentration NO 3 - -sewage of N, entering the next stage;
s24, sediment drainage stage: the first aerator 209 and the first stirrer 205 are turned off by the first controller 203 to make the high concentration NO 3 - -sewage precipitation of N for 40min; the first water discharge solenoid valve 202 is opened by the first control device 203, and discharged into the first intermediate water tank 3, and the first water discharge solenoid valve 202 is closed by the first control device 203, and stored.
S3, endogenous carbon storage and short-range denitrification stages:
s31, a primary water inlet stage: the second peristaltic pump 401 is started through the second control device 404, sewage in the water inlet tank 1 is added into the second-level SBBR reactor 4, the water inlet volume is 1/2 of the volume of the second-level SBBR reactor 4, the second peristaltic pump 401 is closed through the second control device 404, water inlet is finished, and the next stage is started;
S32, anaerobic phase: the second stirrer 406, the second phosphate analyzer 411, the second total phosphorus analyzer 412 and the second DO analyzer 413 are started by the second control device 404, at the moment, DO concentration is 0.017mg/L, endogenous carbon storage and secondary anaerobic phosphorus release reaction are carried out (the polysaccharide bacteria GAOs can fully utilize COD in raw sewage under anaerobic condition to carry out high-efficiency storage of PHAs, and phosphorus release is completed by the phosphorus accumulating bacteria under anaerobic condition), when the phosphorus release rate PO 4 3- -P/TP is 97%, controlling the end of the reaction, entering the next stage;
s33, a secondary water inlet stage: the third peristaltic pump 402 is started through the second control device 404, sewage in the first intermediate water tank 3 is added into the second-level SBBR reactor 4, the water inlet volume is 1/2 of the volume of the second-level SBBR reactor 4, the third peristaltic pump 402 is closed through the second control device 404, water inlet is finished, and the next stage is started;
s34, anoxic stage: the first ammonia nitrogen analyzer 408, the second nitrite nitrogen analyzer 409 and the second nitrate nitrogen analyzer 410 are started by the second control device 404, the DO concentration is 0.04mg/L, the PHAs stored in the anaerobic phase of S32 are used for carrying out endogenous short-range denitrification reaction under the anoxic condition, and when the nitrite rate NO 2 - -N/NO x - -N is 97%, and NO 2 - -N/NH 4 + -N is 1.3, controlling the end of the reaction, entering the next stage;
s35, sediment drainage stage: closing the second stirrer 406 through the second control device 404 to precipitate the water treated by the second-stage SBBR reactor 4 for 40 minutes; the second water discharge solenoid valve 403 is opened by the second control device 404, and discharged into the second intermediate water tank 5, and the second water discharge solenoid valve 403 is closed by the second control device 404, and stored.
S4, anaerobic ammoxidation and secondary aerobic dephosphorization stages:
s41, water inlet stage: the third control device 605 starts the fourth peristaltic pump 603 and the diving impeller 609, the sewage in the second intermediate water tank 5 is added into the reaction outer chamber 601 of the anaerobic ammonia oxidation dephosphorization reactor 6, the sewage and the porous suspended ball biological filler 610 are pushed to be uniformly distributed in the reaction outer chamber 601, the third control device 605 closes the fourth peristaltic pump 603, the water inlet is finished, and the next stage is entered;
s42, anaerobic phase: the second ammonia nitrogen analyzer 615, the third nitrite nitrogen analyzer 616, the total nitrogen analyzer 617 and the third DO analyzer 618 are started by the third control device 605, the DO concentration is 0.017mg/L, the anaerobic ammonia oxidation denitrification reaction is carried out, and when NH 4 + -N and NO 2 - The concentration of N is 0mg/L, the concentration of TN is 12mg/L, the reaction is controlled to be finished, and the sewage in the reaction outer chamber 601 flows into the reaction inner chamber 602 through the overflow port 608 to enter the next stage;
S43, an aerobic stage: the second aeration device 614 and the third total phosphorus analyzer 619 are started through the third control device 605, DO concentration is controlled to be 4mg/L through the second nano microporous aeration disc 611, a secondary aerobic phosphorus removal reaction is carried out, when TP concentration is 0.3mg/L, the control reaction is finished, and the next stage is entered;
s44, sediment drainage stage: closing the second aeration device 614 by the third control device 605 to precipitate water in the reaction chamber 602 for 40min; the third water discharge electromagnetic valve 604 is opened by the third control device 605 to be discharged into the water discharge tank 7, so that the water with the quality reaching the standard can be discharged.
Example 2
The embodiment provides a method for enhancing nitrogen and phosphorus removal of sewage with low carbon nitrogen ratio, and the water quality of inlet water is as follows: NH (NH) 4 + -N80 mg/L, BOD 500mg/L, TN 100mg/L, TP mg/L, BOD/TN=5. Adopt low carbon nitrogen ratio sewage to strengthen system of denitrification and dephosphorization, specific steps are as follows:
s1, a preparation stage:
the same as in example 1, wherein the sludge concentration in the primary SBBR reactor was 4000mg/L, the sludge concentration in the secondary SBBR reactor was 4000mg/L, and the sludge concentration in the reaction chamber was 3500mg/L.
S2, a full-process nitrification and primary aerobic dephosphorization reaction stage:
s21, water inlet stage: as in example 1;
S22, anaerobic phase: the first stirrer 205, the first phosphate analyzer 212, the first total phosphorus analyzer 213 and the first DO analyzer 214 were turned on by the first control device 203, at which time DO concentration was 0.018mg/L, to perform a primary anaerobic phosphorus release reaction, when the phosphorus release rate PO was 4 3- -P/TP is 96%, controlling the end of the reaction, entering the next stage;
s23, an aerobic stage: the first aeration device 209, the first nitrite nitrogen analyzer 210 and the first nitrate nitrogen analyzer 211 are started through the first control device 203, DO concentration is controlled to be 4.0mg/L through the first nano microporous aeration disc 207, the whole-course nitrification and the primary aerobic dephosphorization reaction are carried out, and when the nitrate rate NO 3 - -N/NO x - The concentration of the-N is 96 percent, the concentration of the TP is 0.4mg/L, and the reaction is controlled to be finished, thus obtaining high concentration NO 3 - -sewage of N, entering the next stage;
s24, sediment drainage stage: the first aerator 209 and the first stirrer 205 are turned off by the first controller 203 to make the high concentration NO 3 - -sewage precipitation of N for 60min; the first water discharge solenoid valve 202 is opened by the first control device 203, and discharged into the first intermediate water tank 3, and the first water discharge solenoid valve 202 is closed by the first control device 203, and stored.
S3, endogenous carbon storage and short-range denitrification stages:
S31, a primary water inlet stage: the second peristaltic pump 401 is started through the second control device 404, sewage in the water inlet tank 1 is added into the second-level SBBR reactor 4, the water inlet volume is 2/3 of the volume of the second-level SBBR reactor 4, the second peristaltic pump 401 is closed through the second control device 404, water inlet is finished, and the next stage is started;
s32, anaerobic phase: the second stirrer 406, the second phosphate analyzer 411, the second total phosphorus analyzer 412 and the second DO analyzer 413 are started by the second control device 404, at this time, DO concentration is 0.018mg/L, endogenous carbon storage and secondary anaerobic phosphorus release reaction are carried out (the polysaccharide bacteria GAOs can fully utilize COD in raw sewage under anaerobic condition to carry out high-efficiency storage of PHAs, and phosphorus release is completed by the phosphorus accumulating bacteria under anaerobic condition), when phosphorus is releasedRate PO 4 3- -P/TP is 96%, controlling the end of the reaction, entering the next stage;
s33, a secondary water inlet stage: the third peristaltic pump 402 is started through the second control device 404, sewage in the first intermediate water tank 3 is added into the second-level SBBR reactor 4, the water inlet volume is 1/3 of the volume of the second-level SBBR reactor 4, the third peristaltic pump 402 is closed through the second control device 404, water inlet is finished, and the next stage is started;
S34, anoxic stage: the first ammonia nitrogen analyzer 408, the second nitrite nitrogen analyzer 409 and the second nitrate nitrogen analyzer 410 are started by the second control device 404, the DO concentration is 0.05mg/L, the PHAs stored in the anaerobic phase of S32 are used for carrying out endogenous short-range denitrification reaction under the anoxic condition, and when the nitrite rate NO 2 - -N/NO x - -N is 96% and NO 2 - -N/NH 4 + -N is 1.5, controlling the end of the reaction, entering the next stage;
s35, sediment drainage stage: closing the second stirrer 406 through the second control device 404 to precipitate the water treated by the second-stage SBBR reactor 4 for 60 minutes; the second water discharge solenoid valve 403 is opened by the second control device 404, and discharged into the second intermediate water tank 5, and the second water discharge solenoid valve 403 is closed by the second control device 404, and stored.
S4, anaerobic ammoxidation and secondary aerobic dephosphorization stages:
s41, water inlet stage: as in example 1;
s42, anaerobic phase: the second ammonia nitrogen analyzer 615, the third nitrite nitrogen analyzer 616, the total nitrogen analyzer 617 and the third DO analyzer 618 are started by the third control device 605, the DO concentration is 0.018mg/L, the anaerobic ammonia oxidation denitrification reaction is carried out, and when NH 4 + -N and NO 2 - The concentration of N is 0mg/L, the concentration of TN is 14mg/L, the reaction is controlled to be finished, and sewage in the reaction outer chamber 601 flows into the reaction inner chamber 602 through the overflow port 608 to enter the next stage;
S43, an aerobic stage: the second aeration device 614 and the third total phosphorus analyzer 619 are started through the third control device 605, DO concentration is controlled to be 5mg/L through the second nano microporous aeration disc 611, a secondary aerobic phosphorus removal reaction is carried out, when TP concentration is 0.4mg/L, the control reaction is finished, and the next stage is entered;
s44, sediment drainage stage: closing the second aeration device 614 by the third control device 605 to precipitate the water in the reaction chamber 602 for 60min; the third water discharge electromagnetic valve 604 is opened by the third control device 605 to be discharged into the water discharge tank 7, so that the water with the quality reaching the standard can be discharged.
Example 3
The embodiment provides a method for enhancing nitrogen and phosphorus removal of sewage with low carbon nitrogen ratio, and the water quality of inlet water is as follows: NH (NH) 4 + -N60 mg/L, BOD 300mg/L, TN mg/L, TP mg/L, BOD/TN=4. Adopt low carbon nitrogen ratio sewage to strengthen system of denitrification and dephosphorization, specific steps are as follows:
s1, a preparation stage:
the same as in example 1, wherein the sludge concentration in the primary SBBR reactor was 3000mg/L, the sludge concentration in the secondary SBBR reactor was 3000mg/L, and the sludge concentration in the reaction chamber was 3000mg/L.
S2, a full-process nitrification and primary aerobic dephosphorization reaction stage:
s21, water inlet stage: as in example 1;
S22, anaerobic phase: the first stirrer 205, the first phosphate analyzer 212, the first total phosphorus analyzer 213 and the first DO analyzer 214 are turned on by the first control device 203, at this time, the DO concentration is 0.016mg/L, the first-stage anaerobic phosphorus release reaction is performed, and when the phosphorus release rate PO is reached 4 3- P/TP is 98%, the reaction is controlled to be ended, and the next stage is carried out;
s23, an aerobic stage: the first aeration device 209, the first nitrite nitrogen analyzer 210 and the first nitrate nitrogen analyzer 211 are started through the first control device 203, DO concentration is controlled to be 2.0mg/L through the first nano microporous aeration disc 207, the whole-course nitrification and the primary aerobic dephosphorization reaction are carried out, and when the nitrate rate NO 3 - -N/NO x - The concentration of the-N is 98 percent, the concentration of the TP is 0.3mg/L, and the reaction is controlled to be finished, thus obtaining high concentration NO 3 - -sewage of N, entering the next stage;
s24, sediment drainageStage: the first aerator 209 and the first stirrer 205 are turned off by the first controller 203 to make the high concentration NO 3 - -sewage precipitation of N for 30min; the first water discharge solenoid valve 202 is opened by the first control device 203, and discharged into the first intermediate water tank 3, and the first water discharge solenoid valve 202 is closed by the first control device 203, and stored.
S3, endogenous carbon storage and short-range denitrification stages:
S31, a primary water inlet stage: the second peristaltic pump 401 is started through the second control device 404, sewage in the water inlet tank 1 is added into the second-level SBBR reactor 4, the water inlet volume is 1/3 of the volume of the second-level SBBR reactor 4, the second peristaltic pump 401 is closed through the second control device 404, water inlet is finished, and the next stage is started;
s32, anaerobic phase: the second stirrer 406, the second phosphate analyzer 411, the second total phosphorus analyzer 412 and the second DO analyzer 413 are started by the second control device 404, at this time, the DO concentration is 0.016mg/L, the endogenous carbon storage and the secondary anaerobic phosphorus release reaction are carried out (the polysaccharide bacteria GAOs can fully utilize COD in the raw sewage under the anaerobic condition to carry out the efficient storage of PHAs, and simultaneously the phosphorus release of the phosphorus accumulating bacteria is completed under the anaerobic condition), when the phosphorus release rate PO is low 4 3- P/TP is 98%, the reaction is controlled to be ended, and the next stage is carried out;
s33, a secondary water inlet stage: the third peristaltic pump 402 is started through the second control device 404, sewage in the first intermediate water tank 3 is added into the second-level SBBR reactor 4, the water inlet volume is 2/3 of the volume of the second-level SBBR reactor 4, the third peristaltic pump 402 is closed through the second control device 404, water inlet is finished, and the next stage is started;
S34, anoxic stage: the first ammonia nitrogen analyzer 408, the second nitrite nitrogen analyzer 409 and the second nitrate nitrogen analyzer 410 are started by the second control device 404, the DO concentration is 0.03mg/L, the PHAs stored in the anaerobic phase of S32 are used for carrying out endogenous short-range denitrification reaction under the anoxic condition, and when the nitrite rate NO 2 - -N/NO x - -N is 98%, and NO 2 - -N/NH 4 + -N is 1.1, controlling the end of the reaction, entering the next stage;
s35, sediment drainage stage: closing the second stirrer 406 through the second control device 404 to precipitate the water treated by the second-stage SBBR reactor 4 for 30min; the second water discharge solenoid valve 403 is opened by the second control device 404, and discharged into the second intermediate water tank 5, and the second water discharge solenoid valve 403 is closed by the second control device 404, and stored.
S4, anaerobic ammoxidation and secondary aerobic dephosphorization stages:
s41, water inlet stage: as in example 1;
s42, anaerobic phase: the second ammonia nitrogen analyzer 615, the third nitrite nitrogen analyzer 616, the total nitrogen analyzer 617 and the third DO analyzer 618 are started by the third control device 605, the DO concentration is 0.016mg/L, the anaerobic ammonia oxidation denitrification reaction is carried out, and when NH 4 + -N and NO 2 - The concentration of N is 0mg/L, the concentration of TN is 11mg/L, the reaction is controlled to be finished, and sewage in the reaction outer chamber 601 flows into the reaction inner chamber 602 through the overflow port 608 to enter the next stage;
S43, an aerobic stage: the second aeration device 614 and the third total phosphorus analyzer 619 are started through the third control device 605, DO concentration is controlled to be 3mg/L through the second nano microporous aeration disc 611, a secondary aerobic phosphorus removal reaction is carried out, when TP concentration is 0.3mg/L, the control reaction is finished, and the next stage is entered;
s44, sediment drainage stage: closing the second aeration device 614 by the third control device 605 to precipitate water in the reaction chamber 602 for 30min; the third water discharge electromagnetic valve 604 is opened by the third control device 605 to be discharged into the water discharge tank 7, so that the water with the quality reaching the standard can be discharged.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, or alternatives falling within the spirit and principles of the invention.

Claims (9)

1. A method for enhancing nitrogen and phosphorus removal of sewage with low carbon nitrogen ratio is characterized in that a system for enhancing nitrogen and phosphorus removal of sewage with low carbon nitrogen ratio is adopted, and the system comprises a water inlet tank, a primary SBBR reactor, a first intermediate tank, a secondary SBBR reactor, a second intermediate tank, an anaerobic ammonia oxidation phosphorus removal reactor and a water outlet tank; wherein,
the primary SBBR reactor is connected with the water inlet tank and is used for carrying out primary anaerobic phosphorus release reaction, whole-course nitrification and primary aerobic phosphorus removal reaction;
The first intermediate water tank is connected with the first stage SBBR reactor and is used for receiving the sewage which is exported after being treated by the first stage SBBR reactor;
the second-level SBBR reactor is connected with the water inlet tank and the first intermediate tank, and is used for carrying out endogenous carbon storage and second-level anaerobic phosphorus release reaction on the sewage led in by the water inlet tank and then carrying out endogenous short-cut denitrification reaction on the sewage led in by the first intermediate tank;
the second intermediate water tank is connected with the second-level SBBR reactor and is used for receiving the sewage which is exported after being treated by the second-level SBBR reactor;
the anaerobic ammonia oxidation dephosphorization reactor is provided with a reaction outer chamber connected with the second middle water tank and a reaction inner chamber which is positioned in the reaction outer chamber and is communicated with the reaction outer chamber; the reaction outer chamber is used for carrying out anaerobic ammonia oxidation denitrification reaction on the sewage led in by the second intermediate water tank; the reaction inner chamber is used for carrying out a secondary aerobic dephosphorization reaction on the sewage led in by the reaction outer chamber; the anaerobic ammonia oxidation dephosphorization reactor comprises a porous suspended ball biological filler, wherein the porous suspended ball biological filler is arranged in the reaction outer chamber and is used for attaching microorganisms in sludge and sewage, and the volume filling ratio is 35% -45%;
The water outlet pool is connected with the reaction inner chamber and is used for receiving the discharged water with the water quality reaching the standard after being treated in the reaction inner chamber;
the method for enhancing nitrogen and phosphorus removal of the sewage with the low carbon-nitrogen ratio comprises the following steps:
s1, a preparation stage:
s11, inoculating the residual sludge of the secondary sedimentation tank of the sewage treatment plant of the A/O process into the primary SBBR reactor, so that the sludge concentration in the primary SBBR reactor is 3000-4000 mg/L;
s12, inoculating the domesticated high-concentration NO in a secondary SBBR reactor 2 - The denitrification sludge of the N ensures that the sludge concentration in the secondary SBBR reactor is 3000-4000 mg/L;
s13, placing porous suspended ball biological filler loaded with anaerobic ammonia oxidation microorganisms in a reaction outer chamber of the anaerobic ammonia oxidation phosphorus removal reactor;
s14, inoculating the residual sludge of a secondary sedimentation tank of an A/O process sewage treatment plant into a reaction inner chamber of an anaerobic ammonia oxidation dephosphorization reactor, so that the sludge concentration in the reaction inner chamber is 3000-350 mg/L;
s2, a full-process nitrification and primary aerobic dephosphorization reaction stage:
s21, anaerobic phase: adding sewage in a water inlet tank into a primary SBBR reactor, stirring, performing primary anaerobic phosphorus release reaction, and reacting as PO 4 3- -P/TP exceeds 95%, controlling the end of the reaction;
S22, an aerobic stage: introducing air into the primary SBBR reactor to ensure that the DO concentration is 2.0-4.0 mg/L, stirring, performing full-course nitrification and primary aerobic dephosphorization reaction, and reacting as NO 3 - -N/NO x - The concentration of the-N exceeds 95 percent, the concentration of the TP is lower than 0.5mg/L, and the reaction is controlled to be ended, thus obtaining high concentration NO 3 - -N sewage;
s23, precipitation drainage stage: subjecting the high concentration NO to 3 - Depositing the sewage of the N for 30-60 min, and discharging the sewage into a first intermediate water tank for storage;
s3, endogenous carbon storage and short-range denitrification stages:
s31, anaerobic phase: adding sewage in a water inlet tank into a secondary SBBR reactor, stirring, carrying out endogenous carbon storage and secondary anaerobic phosphorus release reaction, and obtaining the product when PO (potential of hydrogen) is obtained, wherein the volume of the sewage is 1/3-2/3 of the volume of the secondary SBBR reactor 4 3- -P/TP exceeds 95%, controlling the end of the reaction;
s32, anoxic stage: adding the sewage in the first intermediate water tank into a secondary SBBR reactor, wherein the water inlet volume is the volume of the secondary SBBR reactor, stirring, carrying out endogenous short-range denitrification reaction, and when NO 2 - -N/NO x - -N exceeds 95%, and NO 2 - -N/NH 4 + -N is 1.1-1.5, and the reaction is controlled to be finished;
s33, precipitation drainage stage: precipitating the water treated by the secondary SBBR for 30-60 min, and discharging the water into a second intermediate water tank for storage;
s4, anaerobic ammoxidation and secondary aerobic dephosphorization stages:
S41, anaerobic phase: adding the sewage in the second intermediate water tank into the reaction outer chamber of the anaerobic ammonia oxidation dephosphorization reactor, stirring, performing anaerobic ammonia oxidation denitrification reaction, and when NH 4 + -N and NO 2 - The concentration of N is 0mg/L, the concentration of TN is below 15mg/L, the reaction is controlled to be finished, and the sewage in the reaction outer chamber flows into the reaction inner chamber;
s43, an aerobic stage: introducing air into the reaction inner chamber to ensure that the DO concentration is 3-5 mg/L, stirring, performing a secondary aerobic dephosphorization reaction, and controlling the reaction to be ended when the TP concentration is below 0.5 mg/L;
s44, sediment drainage stage: and (3) precipitating water in the reaction inner chamber for 30-60 min, and discharging the water into a water discharge tank to obtain the water which can be discharged and has the water quality reaching the standard.
2. The method for enhanced nitrogen and phosphorus removal of low carbon to nitrogen ratio wastewater of claim 1, wherein the primary SBBR reactor comprises a first body, a first stirrer, a first filler support, and a first nano-microporous aeration disc; wherein,
the first body is provided with a first inner cavity communicated with the water inlet pool and the first middle pool;
the first stirrer is arranged on the first stirrer body and extends into the first inner cavity;
the first filler brackets are arranged in the first inner cavity and positioned at the outer side of the first stirrer, and are provided with a plurality of first vertical brackets arranged along the vertical direction;
The first nano microporous aeration disc is arranged at the bottom end of the first inner cavity and is used for introducing air into the first inner cavity.
3. The method for enhanced nitrogen and phosphorus removal of low carbon nitrogen ratio wastewater according to claim 2, wherein the first vertical support is uniformly provided with a first biological filler for attaching microorganisms in the wastewater and the sludge; the volume filling ratio of the first biological filler is 35% -45%.
4. The method for enhanced nitrogen and phosphorus removal of low carbon to nitrogen ratio wastewater of claim 2 wherein said primary SBBR reactor further comprises a first nitrite nitrogen analyzer, a first nitrate nitrogen analyzer, a first phosphate analyzer, a first total phosphorus analyzer and a first DO analyzer.
5. The method for enhanced nitrogen and phosphorus removal of low carbon to nitrogen ratio wastewater of claim 1 wherein said secondary SBBR reactor comprises a second vessel, a second agitator and a second filler holder; wherein,
the second body is provided with a second inner cavity communicated with the water inlet tank, the first middle water tank and the second middle water tank;
the second stirrer is arranged on the second stirrer body and extends into the second inner cavity;
The second filler support is arranged in the second inner cavity and positioned at the outer side of the second stirrer, and is provided with a plurality of second vertical supports arranged along the vertical direction.
6. The method for enhanced nitrogen and phosphorus removal of low carbon nitrogen ratio wastewater according to claim 5, wherein second biological fillers are uniformly distributed on the second vertical support and used for attaching microorganisms in the wastewater and the sludge; the volume filling ratio of the second biological filler is 40% -50%.
7. The method for enhanced nitrogen and phosphorus removal of low carbon to nitrogen ratio wastewater of claim 6 wherein said secondary SBBR reactor further comprises a first ammonia nitrogen analyzer, a second nitrite nitrogen analyzer, a second nitrate nitrogen analyzer, a second phosphate analyzer, a second total phosphorus analyzer and a second DO analyzer.
8. The method for enhanced nitrogen and phosphorus removal of low carbon nitrogen ratio wastewater according to claim 1, wherein the anaerobic ammonia oxidation phosphorus removal reactor comprises an outer cylinder, an inner cylinder, a submerged flow impeller and a second nano microporous aeration disc; wherein,
the inner cylinder body is arranged in the cylinder cavity of the outer cylinder body, the cylinder cavity of the inner cylinder body is the reaction inner chamber, and the reaction outer chamber is formed between the inner cylinder body and the outer cylinder body; an overflow port communicated with the reaction outer chamber is arranged at the top of the side wall of the inner cylinder body;
The diving impeller is positioned on the side wall of the outer cylinder body and is used for pushing sewage and porous suspension ball biological filler in the reaction outer chamber to be uniformly distributed;
the second nano microporous aeration disc is positioned at the bottom of the cylinder cavity of the inner cylinder body and is used for introducing air into the reaction inner chamber;
the top of the reaction outer chamber is provided with an exhaust port for discharging nitrogen generated by the anaerobic ammonia oxidation denitrification reaction.
9. The method for enhanced nitrogen and phosphorus removal of low carbon to nitrogen ratio wastewater of claim 8 wherein said anaerobic ammonia oxidation phosphorus removal reactor further comprises a second ammonia nitrogen analyzer, a third nitrite nitrogen analyzer, a total nitrogen analyzer, a third DO analyzer, and a third total phosphorus analyzer; wherein,
probes of the second ammonia nitrogen analyzer, the third nitrite nitrogen analyzer and the total nitrogen analyzer are inserted into the reaction outer chamber;
the probe of the third total phosphorus analyzer is inserted into the reaction inner chamber;
the third DO analyzer is provided with two sets of probes, one set of probes being inserted into the reaction outer chamber and the other set of probes being inserted into the reaction inner chamber.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103663862A (en) * 2013-11-25 2014-03-26 北京工业大学 Device and method for nitrogen and phosphorus removal for low CN ratio urban sewage through nitrosation and anaerobic ammonia oxidation coupling denitrifying phosphorus removal intensification
CN112479371A (en) * 2020-11-10 2021-03-12 青岛大学 Device and method for removing nitrogen and phosphorus from municipal sewage
CN115259375A (en) * 2022-07-28 2022-11-01 北京工业大学 Device and method for strengthening anaerobic ammonia oxidation and denitrification dephosphorization of AOA process by staged water inflow
US20230100166A1 (en) * 2021-09-27 2023-03-30 Beijing University Of Technology Device and method for treating urban domestic sewage based on two-stage combined process of partial denitrification-anammox

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103663862A (en) * 2013-11-25 2014-03-26 北京工业大学 Device and method for nitrogen and phosphorus removal for low CN ratio urban sewage through nitrosation and anaerobic ammonia oxidation coupling denitrifying phosphorus removal intensification
CN112479371A (en) * 2020-11-10 2021-03-12 青岛大学 Device and method for removing nitrogen and phosphorus from municipal sewage
US20230100166A1 (en) * 2021-09-27 2023-03-30 Beijing University Of Technology Device and method for treating urban domestic sewage based on two-stage combined process of partial denitrification-anammox
CN115259375A (en) * 2022-07-28 2022-11-01 北京工业大学 Device and method for strengthening anaerobic ammonia oxidation and denitrification dephosphorization of AOA process by staged water inflow

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
李颖.垃圾渗滤液处理技术及工程实例.中国环境科学出版社,2008,(第1版),第255-257页. *

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