Anammox Enhanced Stress Resistance Reaction System and Method Based on Sludge Circulation Compensation

Abstract

The present invention discloses an Anammox enhanced stress resistance reaction system and method based on sludge circulation compensation, belonging to the field of sewage treatment. The reaction system includes an Anammox reaction device, a sludge compensation module, an Anammox sludge recovery module, and a monitoring and intelligent control module. The inner cavity of the Anammox reaction device is divided into a reaction zone and an upper pressure monitoring zone; a pressure detection probe for detecting the gas pressure in the pressure monitoring zone is provided at the top of the Anammox reaction device; the pressure detection probe is connected to the monitoring and intelligent control module through a pressure signal transmission wire, and sludge activity judgment is carried out in the monitoring and intelligent control module. By controlling the sludge compensation module and the Anammox sludge recovery module through the monitoring and intelligent control module, the inhibited sludge and stress-resistant sludge are refluxed, and the sludge circulation can be quantitatively regulated. The system has the advantages of high efficiency in resisting adversity, precise regulation, automation, and intelligence.

Description

Technical Field

[0001] The present invention belongs to the field of sewage treatment, and particularly relates to an Anammox enhanced stress resistance reaction system based on sludge circulation compensation. Background Art

[0002] Anaerobic ammonium oxidation (Anammox) is an autotrophic biological nitrogen removal process. Compared with the traditional nitrification-denitrification process, the Anammox process has the advantages of not requiring aeration and external carbon sources, as well as low sludge production, so it is regarded as the core process for low-carbon biological treatment of wastewater. However, anaerobic ammonium-oxidizing bacteria (AnAOB) are highly sensitive to environmental factors, and factors such as dissolved oxygen, organic matter, temperature, and salinity may all have independent effects on them, thus making the stable operation of the Anammox process a bottleneck in application.

[0003] Traditional Anammox wastewater treatment processes generally use a single reaction system. However, due to the high environmental sensitivity of AnAOB, the Anammox system is prone to collapse under adverse conditions. Compared with common wastewater treatment microorganisms, the proliferation time of AnAOB is longer, resulting in the difficulty of the Anammox system to quickly recover under adverse conditions, and further causing insufficient bacterial supply in the Anammox project, which is also one of the key bottlenecks in the engineering application of the Anammox process.

[0004] In the prior art, monitoring the concentration changes of ammonia nitrogen and nitrite in the reactor can indirectly evaluate the biological activity of AnAOB. However, the monitoring of the concentration of ammonia nitrogen and nitrite in the reactor takes a long time, and this indicator is indirect. Pressure is a direct indicator that can prove the biological activity of AnAOB in addition to visual characteristics. The magnitude of pressure reflects the nitrogen removal efficiency of the process and can be used as a detection means for the active state of Anammox sludge. In addition, the process of directly measuring the pressure value through a pressure probe is fast and convenient. Therefore, the Anammox sludge active state monitoring technology can be developed by monitoring the pressure of the reactor.

[0005] Therefore, there is an urgent need to develop an Anammox reaction system that can efficiently resist the adversity of the Anammox process and can be automatically and precisely regulated. Summary of the Invention

[0006] The purpose of the present invention is to solve the deficiencies in the prior art and provide an Anammox enhanced stress resistance reaction system and method based on sludge circulation compensation.

[0007] The specific technical solutions adopted by the present invention are as follows:

[0008] In a first aspect, the present invention provides an Anammox enhanced stress resistance reaction system based on sludge circulation compensation, comprising an Anammox reaction device, a sludge compensation module, an Anammox sludge recovery module, and a monitoring and intelligent control module.

[0009] The inner cavity of the Anammox reaction device is divided into a reaction zone and an upper pressure monitoring zone. A pressure detection probe for detecting the gas pressure in the pressure monitoring zone is provided at the top of the Anammox reaction device. The pressure detection probe is connected to the monitoring and intelligent control module through a pressure signal transmission wire, and sludge activity judgment is carried out in the monitoring and intelligent control module.

[0010] A reaction device water inlet pipe for introducing wastewater to be treated is provided at the bottom of the side wall of the reaction zone. A reaction device sludge inlet and a plurality of reaction device sludge outlets are also provided on the side wall of the reaction zone, and the reaction device sludge inlet is arranged below the reaction device sludge outlets. A reaction device water outlet pipe is provided above the reaction device sludge outlets.

[0011] The sludge compensation module includes a plurality of sludge discharge pipes, and each sludge discharge pipe is communicated with the reaction device sludge outlets. The sludge discharge pipes are arranged in parallel and are connected to the Anammox sludge recovery module through a pipe provided with a sludge discharge one-way main valve.

[0012] The Anammox sludge recovery module includes a sludge recovery device for carrying out anaerobic ammonium oxidation reaction and a sludge return pipe. A recovery device water outlet pipe and a recovery device water inlet pipe for introducing simulated wastewater are provided on the sludge recovery device. A recovery device sludge outlet and a recovery device sludge inlet are also provided on the sludge recovery device, and the recovery device sludge outlet is communicated with the reaction device sludge inlet through the sludge return pipe. The recovery device sludge inlet receives the sludge converged from a plurality of sludge discharge pipes in the sludge compensation module.

[0013] Preferably, 3 reaction device sludge outlets are provided on the side wall of the Anammox reaction device. 3 sludge discharge pipes are arranged in the sludge compensation module and are respectively communicated with the 3 reaction device sludge outlets.

[0014] Preferably, a compensation module sludge discharge pump and a compensation module sludge discharge valve are provided on each sludge discharge pipe.

[0015] Preferably, a recovery module sludge discharge pump and a one-way valve are provided on the sludge return pipe.

[0016] Preferably, the composition of the simulated wastewater is: NH4 + -N and NO2 -The ratio of -N is fixed at 1:1.2, and 140 mg / L of KHCO3, 800 mg / L of NaHCO3, 17.5 mg / L of KH2PO4, 17.5 mg / L of CaCl2, 300 mg / L of MgSO4·7H2O and 1 mL / L of trace elements are additionally added.

[0017] Preferably, the monitoring and intelligent control module includes a pressure detector and a control system. The pressure detector is connected to the pressure detection probe through a pressure signal transmission wire. The pressure detector receives the pressure signal from the pressure detection probe, processes it, and outputs pressure data P. The pressure detector is connected to the control system through a pressure data transmission wire and transmits the pressure data P to the control system. The control system is connected to the sludge compensation module and the Anammox sludge recovery module through a control signal transmission wire.

[0018] In a second aspect, the present invention provides an operation method of an Anammox enhanced stress resistance reaction system based on sludge circulation compensation described in the first aspect, which is characterized in that it is specifically as follows:

[0019] The pressure detector in the monitoring and intelligent control module receives the pressure signal from the pressure detection probe, processes it, and outputs pressure data P. The pressure detector is connected to the control system through a pressure data transmission wire and transmits the pressure data P to the control system.

[0020] If the pressure data P is within the range of 75% to 90% of a standard atmospheric pressure P0, it is determined that the reaction in the Anammox reaction device is moderately inhibited. The control system opens the drain one-way main valve and the compensation module drain valve in the sludge compensation module through the control signal transmission wire. At the same time, it opens the recovery module drain pump and the one-way valve in the Anammox sludge recovery module, controls the rotation speeds of the compensation module drain pump and the recovery module drain pump to be equal, and replaces 1 / 3 of the moderately inhibited sludge in the Anammox reaction device with the recovered sludge in the sludge recovery device.

[0021] If the pressure data P is within the range of 50% to 75% of a standard atmospheric pressure P0, it is determined that the reaction in the Anammox reaction device is severely inhibited. The control system opens the drain one-way main valve and the compensation module drain valve in the sludge compensation module through the control signal transmission wire. At the same time, it opens the recovery module drain pump and the one-way valve in the Anammox sludge recovery module, controls the rotation speeds of the compensation module drain pump and the recovery module drain pump to be equal, and replaces 1 / 2 of the severely inhibited sludge in the Anammox reaction device with the recovered sludge in the sludge recovery device.

[0022] If the pressure data P is higher than 90% of a standard atmospheric pressure P0, it is determined that the Anammox reaction device is operating normally and no operation is required.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1) The reaction system provided by the present invention judges the inhibition situation of the sludge in the Anammox reaction device through pressure detection. The pressure detection is fast and convenient, overcomes the problems of long detection time and indirect indicators in traditional detection means, and can more accurately and quickly understand the sludge activity in the Anammox reaction device.

[0025] 2) The Anammox sludge recovery module and the sludge compensation module are provided in the reaction system provided by the present invention, and the inhibited sludge in the Anammox reaction device can be discharged in time. The sludge in the Anammox sludge recovery module is refluxed to the Anammox reaction device through the sludge compensation module to strengthen the sludge activity therein, enhance the denitrification efficiency and anti-stress effect of the reaction system, and realize the stable operation of the entire reaction system.

[0026] 3) The monitoring and intelligent control module is provided in the reaction system provided by the present invention. By judging the pressure data in the Anammox reaction device, the Anammox sludge recovery module and the sludge compensation module are automatically and accurately controlled. The reaction system integrates "reaction - monitoring - regulation", and avoids the risks of the Anammox reaction device being easily interfered by the environment and slow sludge recovery speed through intelligent sludge circulation. The intelligent regulation reduces human resources and is convenient to operate. Description of the Drawings

[0027] Figure 1 It is a flow chart of the Anammox enhanced anti-stress reaction system based on sludge circulation compensation provided in this embodiment;

[0028] In the figure: the reaction device inlet pipe 1, the reaction zone 2, the pressure monitoring zone 3, the pressure detection probe 4, the reaction device inlet mud port 5, the reaction device discharge mud port 6, the reaction device outlet pipe 7, the compensation module discharge mud pump 8, the compensation module discharge mud valve 9, the discharge mud pipe 10, the discharge mud one-way main valve 11, the recovery device outlet pipe 12, the recovery device inlet pipe 13, the sludge recovery device 14, the recovery device discharge mud port 15, the recovery device inlet mud port 16, the sludge reflux pipe 17, the recovery module discharge mud pump 18, the one-way valve 19, the pressure signal transmission wire 20, the pressure detector 21, the pressure data transmission wire 22, the control system 23, the control signal transmission wire 24. Detailed Embodiments

[0029] The present invention will be further described and illustrated below in conjunction with the accompanying drawings and specific embodiments. The technical features of each embodiment of the present invention can be combined correspondingly on the premise that there is no conflict with each other.

[0030] As a preferred embodiment of the specific embodiments of the present invention, an Anammox enhanced stress resistance reaction system based on sludge circulation compensation is provided, and the specific flowchart is as Figure 1 shown. The reaction system includes an Anammox reaction device I, a sludge compensation module II, an Anammox sludge recovery module III, and a monitoring and intelligent control module IV.

[0031] The Anammox reaction device I is a reactor for carrying out anaerobic ammonium oxidation reaction, and its inner cavity is divided into a reaction zone 2 and a pressure monitoring zone 3 above the reaction zone 2. A pressure detection probe 4 for detecting the gas pressure in the pressure monitoring zone 3 is provided at the top of the Anammox reaction device I. The pressure change in the anaerobic ammonium oxidation reactor can reflect the activity state of anaerobic ammonium oxidation bacteria AnAOB bacteria therein and can be used as a direct indicator. The pressure detection probe 4 is connected to the monitoring and intelligent control module IV through a pressure signal transmission wire 20, and sludge activity judgment is carried out in the monitoring and intelligent control module IV.

[0032] A reaction device water inlet pipe 1 for introducing wastewater to be treated is provided on the side wall of the reaction zone 2 of the Anammox reaction device I, and the position of the water inlet pipe 1 is close to the bottom of the reaction zone 2. A reaction device sludge inlet 5 and a plurality of reaction device sludge outlet 6 are also provided on the side wall of the reaction zone 2, and the reaction device sludge inlet 5 is arranged below the reaction device sludge outlet 6; a reaction device water outlet pipe 7 is also provided above the reaction device sludge outlet 6. In this embodiment, three reaction device sludge outlets 6 are provided on the side wall of the reaction zone 2 of the Anammox reaction device I.

[0033] The sludge compensation module II includes a plurality of sludge discharge pipes 10, and each sludge discharge pipe 10 is communicated with the reaction device sludge outlet 6. As Figure 1 shown, in this embodiment, three sludge discharge pipes 10 are provided. Each sludge discharge pipe 10 is respectively communicated with a reaction device sludge outlet 6, and a compensation module sludge discharge pump 8 and a compensation module sludge discharge valve 9 are provided on each sludge discharge pipe 10. The sludge discharge pipes 10 are arranged in parallel and are connected to the Anammox sludge recovery module III through a pipe provided with a sludge discharge check valve 11.

[0034] The Anammox sludge recovery module III includes a sludge recovery device 14 for performing anaerobic ammonium oxidation reactions and a sludge return pipe 17. The sludge recovery device 14 is provided with a recovery device outlet pipe 12 and a recovery device inlet pipe 13 for introducing simulated wastewater. The sludge recovery device 14 is also provided with a recovery device sludge discharge port 15 and a recovery device sludge inlet 16. The recovery device sludge discharge port 15 is connected to the reaction device sludge inlet 5 via the sludge return pipe 17. In this embodiment, the sludge return pipe 17 is provided with a recovery module sludge pump 18 and a one-way valve 19. The recovery device sludge inlet 16 receives sludge from the three sludge discharge pipes 10 in the sludge compensation module II.

[0035] In this embodiment, the monitoring and intelligent control module IV includes a pressure detector 21 and a control system 23. The pressure detector 21 is connected to the pressure detection probe 4 via a pressure signal transmission line 20. The pressure detector 21 receives and processes the pressure signal from the pressure detection probe 4, and outputs pressure data P. The pressure detector 21 is connected to the control system 23 via a pressure data transmission line 22, and transmits the pressure data P to the control system 23. The control system 23 is connected to the sludge compensation module II and the Anammox sludge recovery module III via a control signal transmission line 24. The control system 23 can control the opening and closing of the sludge discharge check valve 11 and the compensation module sludge discharge valve 9 in the sludge compensation module II, as well as the speed of the compensation module sludge discharge pump 8. The control system 23 can also control the opening and closing of the recovery module sludge discharge pump 18 and the check valve 19 in the Anammox sludge recovery module III, as well as the speed of the recovery module sludge discharge pump 18.

[0036] It should be noted that in this embodiment, by setting up an Anammox sludge recovery module III cycle to compensate for the anaerobic ammonia oxidation reaction in the Anammox reaction unit I, the system collapse problem caused by poor stress resistance and lack of seed sludge in the Anammox process can be prevented. The sludge recovery device 14 in the Anammox sludge recovery module III uses prepared simulated wastewater to recover the sludge from the Anammox reaction unit I to ensure the stable proliferation of AnAOB bacteria and provide highly active sludge to the Anammox reaction unit I at any time. In addition, the effluent from the sludge recovery device 14 has a low matrix content and does not contain toxic substances. Returning this part of the effluent to the Anammox reaction unit I can dilute the influent of the reaction system and improve the stress resistance effect.

[0037] The composition of the simulated wastewater used in this embodiment is: NH4+-N and NO2 -The ratio of -N is fixed at 1:1.2, and additionally 140 mg / L KHCO3, 800 mg / L NaHCO3, 17.5 mg / L KH2PO4, 17.5 mg / L CaCl2, 300 mg / L MgSO4·7H2O and 1 mL / L of trace elements are added.

[0038] This embodiment also provides an operation method for the above Anammox enhanced stress resistance reaction system based on sludge circulation compensation, which is specifically as follows:

[0039] Under the daily operating conditions of the Anammox reaction device I, the pressure detection probe 4 monitors the gas pressure in the pressure monitoring area 3. At this time, the sludge compensation module II is closed, and the Anammox sludge recovery module III cultivates highly active sludge with simulated wastewater.

[0040] The pressure detector 21 in the monitoring and intelligent control module IV receives the pressure signal from the pressure detection probe 4 and processes it to output the pressure data P. The pressure detector 21 is connected to the control system 23 through the pressure data transmission wire 22, and transmits the pressure data P to the control system 23.

[0041] If the pressure data P is within the range of 75% to 90% of a standard atmospheric pressure P0, it is determined that the reaction in the Anammox reaction device I is moderately inhibited; the control system 23 opens the sludge discharge one-way main valve 11 and the compensation module sludge discharge valve 9 in the sludge compensation module II through the control signal transmission wire 24, and at the same time opens the recovery module sludge discharge pump 18 and the one-way valve 19 in the Anammox sludge recovery module III, and controls the rotational speeds of the compensation module sludge discharge pump 8 and the recovery module sludge discharge pump 18 to be equal (at this time, the rotational speeds of the two pumps can be controlled to be medium speed), and replaces 1 / 3 of the moderately inhibited sludge in the Anammox reaction device I with the sludge recovered in the sludge recovery device 14;

[0042] If the pressure data P is within the range of 50% to 75% of a standard atmospheric pressure P0, it is determined that the reaction in the Anammox reaction device I is severely inhibited; the control system 23 opens the sludge discharge one-way main valve 11 and the compensation module sludge discharge valve 9 in the sludge compensation module II through the control signal transmission wire 24, and at the same time opens the recovery module sludge discharge pump 18 and the one-way valve 19 in the Anammox sludge recovery module III, and controls the rotational speeds of the compensation module sludge discharge pump 8 and the recovery module sludge discharge pump 18 to be equal (at this time, the rotational speeds of the two pumps can be controlled to be high speed), and replaces 1 / 2 of the severely inhibited sludge in the Anammox reaction device I with the sludge recovered in the sludge recovery device 14;

[0043] If the pressure data P is higher than 90% of a standard atmospheric pressure P0, it is determined that the Anammox reaction device I is operating normally and no operation is required. After the operation is completed, the pressure data, the judgment result, and the executed operation are saved to the system work log.

[0044] The above-described embodiments are only a preferred solution of the present invention, but they are not intended to limit the present invention. Those of ordinary skill in the relevant technical field can also make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all technical solutions obtained by adopting the means of equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. An Anammox enhanced stress resistance reaction system based on sludge circulation compensation, characterized in that, It includes an Anammox reaction device (I), a sludge compensation module (II), an Anammox sludge recovery module (III), and a monitoring and intelligent control module (IV); The inner cavity of the Anammox reaction device (I) is divided into a reaction zone (2) and an upper pressure monitoring zone (3); a pressure detection probe (4) for detecting the gas pressure in the pressure monitoring zone (3) is provided at the top of the Anammox reaction device (I); the pressure detection probe (4) is connected to the monitoring and intelligent control module (IV) through a pressure signal transmission wire (20), and sludge activity judgment is carried out in the monitoring and intelligent control module (IV); A reaction device inlet pipe (1) for introducing wastewater to be treated is provided at the bottom of the side wall of the reaction zone (2); a reaction device sludge inlet (5) and a plurality of reaction device sludge outlets (6) are also opened on the side wall of the reaction zone (2), and the reaction device sludge inlet (5) is arranged below the reaction device sludge outlet (6); a reaction device outlet pipe (7) is provided above the reaction device sludge outlet (6); The sludge compensation module (II) includes a plurality of sludge discharge pipes (10), and each sludge discharge pipe (10) is communicated with the reaction device sludge outlet (6); the sludge discharge pipes (10) are arranged in parallel and are connected to the Anammox sludge recovery module (III) through a pipe provided with a sludge discharge one-way main valve (11); The Anammox sludge recovery module (III) includes a sludge recovery device (14) for carrying out anaerobic ammonia oxidation reaction and a sludge return pipe (17); a recovery device outlet pipe (12) and a recovery device inlet pipe (13) for introducing simulated wastewater are provided on the sludge recovery device (14); a recovery device sludge outlet (15) and a recovery device sludge inlet (16) are also opened on the sludge recovery device (14), and the recovery device sludge outlet (15) is communicated with the reaction device sludge inlet (5) through the sludge return pipe (17); the recovery device sludge inlet (16) receives the sludge converged from a plurality of sludge discharge pipes (10) in the sludge compensation module (II); The monitoring and intelligent control module (IV) includes a pressure detector (21) and a control system (23); the pressure detector (21) is connected to the pressure detection probe (4) through a pressure signal transmission wire (20), the pressure detector (21) receives the pressure signal from the pressure detection probe (4) and processes it, and outputs pressure data P; the pressure detector (21) is connected to the control system (23) through a pressure data transmission wire (22), and transmits the pressure data P to the control system (23); the control system (23) is communicated with the sludge compensation module (II) and the Anammox sludge recovery module (III) through a control signal transmission wire (24).

2. The Anammox enhanced stress resistance reaction system based on sludge circulation compensation according to claim 1, characterized in that, Three reaction device sludge outlets (6) are opened on the side wall of the Anammox reaction device (I); three sludge discharge pipes (10) are arranged in the sludge compensation module (II) and are respectively communicated with the three reaction device sludge outlets (6).

3. The Anammox enhanced stress resistance reaction system based on sludge circulation compensation according to claim 1, wherein A compensation module sludge discharge pump (8) and a compensation module sludge discharge valve (9) are provided on each of the sludge discharge pipes (10).

4. The Anammox enhanced stress resistance reaction system based on sludge circulation compensation according to claim 1, characterized in that A recovery module sludge discharge pump (18) and a one-way valve (19) are provided on the sludge return pipe (17).

5. The Anammox enhanced stress resistance reaction system based on sludge circulation compensation according to claim 1, wherein The composition of the simulated wastewater is: NH4 + -N and NO2 - -N with a fixed ratio of 1:1.2, and additionally 140 mg / L KHCO3, 800 mg / L NaHCO3, 17.5 mg / L KH2PO4, 17.5 mg / L CaCl2, 300 mg / L MgSO4•7H2O and 1 mL / L of trace elements are added.

6. A method for operating an Anammox enhanced stress resistance reaction system based on sludge circulation compensation according to claim 1, characterized in that, Specifically as follows: The pressure detector (21) in the monitoring and intelligent control module (IV) receives the pressure signal from the pressure detection probe (4), processes it, and outputs the pressure data P; the pressure detector (21) is connected to the control system (23) through the pressure data transmission wire (22), and transmits the pressure data P to the control system (23); If the pressure data P is within the range of 75% - 90% of a standard atmospheric pressure P0, it is determined that the reaction in the Anammox reaction device (I) is moderately inhibited; the control system (23) opens the sludge discharge one-way main valve (11) and the compensation module sludge discharge valve (9) in the sludge compensation module (II) through the control signal transmission wire (24), and at the same time opens the recovery module sludge discharge pump (18) and the one-way valve (19) in the Anammox sludge recovery module (III), controls the rotation speeds of the compensation module sludge discharge pump (8) and the recovery module sludge discharge pump (18) to be equal, and replaces 1 / 3 of the moderately inhibited sludge in the Anammox reaction device (I) with the recovered sludge in the sludge recovery device (14); If the pressure data P is within the range of 50% - 75% of a standard atmospheric pressure P0, it is determined that the reaction in the Anammox reaction device (I) is severely inhibited; the control system (23) opens the sludge discharge one-way main valve (11) and the compensation module sludge discharge valve (9) in the sludge compensation module (II) through the control signal transmission wire (24), and at the same time opens the recovery module sludge discharge pump (18) and the one-way valve (19) in the Anammox sludge recovery module (III), controls the rotation speeds of the compensation module sludge discharge pump (8) and the recovery module sludge discharge pump (18) to be equal, and replaces 1 / 2 of the severely inhibited sludge in the Anammox reaction device (I) with the recovered sludge in the sludge recovery device (14); If the pressure data P is higher than 90% of a standard atmospheric pressure P0, it is determined that the Anammox reaction device (I) is operating normally and no operation is required.

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