Efficient carbon reduction reactor

Abstract

The invention discloses an efficient carbon reduction reactor which comprises a main reactor, a front-end sludge interception pool arranged at the front end of the main reactor and a rear-end sludge interception pool arranged at the rear end of the main reactor, and the front-end sludge interception pool is used for carrying out sludge interception on sewage before the sewage enters the main reactor; the rear-end sludge interception tank is used for carrying out sludge interception on sewage discharged from the main reactor, and the main reactor is used for culturing carbon reduction reaction exclusive sludge and is provided with an aeration system. The efficient carbon reduction reactor has the advantages of high reaction efficiency, strong anti-interference capability and the like, the sludge concentration can be greatly increased without worrying about sludge bulking, the sludge bulking risk is effectively reduced, the sludge age and the sludge concentration are convenient to control, and the working condition control difficulty is low.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a high-efficiency carbon reduction reactor. Background Technology

[0002] Current organic wastewater treatment systems typically include functional units such as nitrification and denitrification, COD degradation, phosphorus removal, decolorization, and disinfection, as well as a carbon reduction reaction unit (used for COD reduction). Cr The degradation reaction is a key component of the system. Existing carbon reduction reaction units suffer from competition between autotrophic and heterotrophic bacteria, resulting in low reaction efficiency, poor anti-interference ability, high risk of sludge bulking under high sludge concentration conditions, difficulty in controlling sludge age and concentration, and high difficulty in operating condition control. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the present invention aims to provide a high-efficiency carbon reduction reactor with advantages such as high reaction efficiency and strong anti-interference ability. It can significantly increase the sludge concentration without worrying about sludge bulking, effectively reduce the risk of sludge bulking, and the sludge age and sludge concentration are easy to control and the operating conditions are easy to manage.

[0004] The objective of this invention is achieved through the following technical solution: A high-efficiency carbon reduction reactor includes a main reactor, a front-end sludge interception tank located at the front end of the main reactor, and a rear-end sludge interception tank located at the rear end of the main reactor. The front-end sludge interception tank is used to intercept sludge from the wastewater before it enters the main reactor, and the rear-end sludge interception tank is used to intercept sludge from the wastewater exiting the main reactor. The main reactor cultivates carbon reduction reaction-specific sludge and is equipped with an aeration system.

[0005] Furthermore, the front-end sludge interception tank is a sedimentation tank, a filtration tank, or a membrane tank; the rear-end sludge interception tank is a sedimentation tank, a filtration tank, or a membrane tank.

[0006] Furthermore, when the front-end sludge interception tank is a sedimentation tank, the sedimentation tank is an inclined tube sedimentation tank or a vertical flow sedimentation tank; when the front-end sludge interception tank is a filter tank, the filter tank is equipped with a high-pressure air backwashing system for backwashing the filter tank; when the front-end sludge interception tank is a membrane tank, the membrane tank adopts a double membrane tank structure, and the main reactor and the membrane tank are constructed separately.

[0007] Furthermore, when the downstream sludge interception tank is a sedimentation tank, the sedimentation tank is an inclined tube sedimentation tank or a vertical flow sedimentation tank; when the downstream sludge interception tank is a filter tank, the filter tank is equipped with a high-pressure air backwashing system for backwashing the filter tank; when the downstream sludge interception tank is a membrane tank, the membrane tank adopts a double membrane tank structure, and the main reactor and the membrane tank are constructed separately.

[0008] Furthermore, the front-end sludge interception tank is connected to a front-end sludge discharge facility for discharging the sludge intercepted in the tank, and the rear-end sludge interception tank is connected to a rear-end sludge discharge facility for discharging the sludge intercepted in the tank; the rear-end sludge discharge facility is connected to a sludge return facility, which is used to return the sludge discharged by the rear-end sludge discharge facility to the main reactor.

[0009] Furthermore, the main reactor adopts a closed structure, and the top of the main reactor is equipped with an vent pipe and a foam discharge pipe. The main reactor discharges water through a guide pipe.

[0010] Furthermore, a sludge baffle is provided at the top of the main reactor to prevent excessive sludge outflow; a packing layer is provided inside the main reactor, and the packing layer is located above the aeration system.

[0011] Furthermore, the high-efficiency carbon reduction reactor also includes an online monitoring system and an automatic control system. The online monitoring system includes a temperature sensor, a pH meter, a sludge concentration meter, and a COD meter. Cr Sensors and dissolved oxygen sensors, the automatic adjustment system is used to control temperature, pH, sludge concentration, COD Cr Automatic regulation of dissolved oxygen.

[0012] Furthermore, the front-end sludge interception tank is equipped with COD... Cr The sensor, the downstream sludge interception tank is equipped with COD Cr The main reactor is equipped with sensors, including a temperature sensor, a pH meter, a sludge concentration meter, and a dissolved oxygen sensor.

[0013] Furthermore, the operating parameters used in the main reactor include: Main reactor influent: COD Cr <1000mg / L and C / TKN>3; Reaction temperature: 15~35℃; Dissolved oxygen (DO): 0.6~2.5 mg / L; pH value: 6.5~8.5; Sludge concentration: 5000~20000 mg / L; Sludge loading: 0.5~1.0 kg COD / (kg MLSS·d); Hydraulic residence time: 4~6h.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The high-efficiency carbon reduction reactor provided by this invention has a front-end sludge interception tank at the front end of the main reactor to intercept sludge from the effluent of the previous treatment unit, so as to avoid affecting the main reactor and causing sludge mixing. A rear-end sludge interception tank is set at the rear end of the main reactor to intercept sludge from the effluent of the main reactor, so as to avoid sludge affecting the next treatment unit. The sludge intercepted in the rear-end sludge interception tank can be returned to the main reactor for continued use. The setting of the front-end sludge interception tank and the rear-end sludge interception tank can facilitate the management of sludge concentration and sludge age, as well as improve the anti-interference ability.

[0015] In the main reactor, a dedicated sludge for carbon reduction reaction (the sludge has a very high proportion of heterotrophic bacteria or only heterotrophic bacteria, theoretically the proportion of heterotrophic bacteria can reach 90%~100%) is used. The cultivation and use of dedicated sludge for carbon reduction reaction greatly increases the reaction efficiency and also helps to reduce interference from other reactions. Using dedicated sludge can greatly increase the sludge concentration without worrying about sludge bulking, effectively reducing the risk of sludge bulking. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the high-efficiency carbon reduction reactor according to an embodiment of the present invention.

[0017] In the picture: 100. Front-end sludge interception tank; 101. Front-end sludge discharge facility; 200. Main reactor; 201. Aeration system; 202. Vent pipe; 203. Foam discharge pipe; 204. Packing layer; 205. Sludge baffle; 300. Back-end sludge interception tank; 301. Back-end sludge discharge facility; 302. Sludge return facility. Detailed Implementation

[0018] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0019] This invention provides a high-efficiency carbon reduction reactor, suitable for COD reduction. Cr Use in influent with a concentration of <1000mg / L and a C / TKN>3.

[0020] refer to Figure 1The high-efficiency carbon reduction reactor includes a main reactor 200, a front-end sludge interception tank 100 located at the front end of the main reactor 200, and a rear-end sludge interception tank 300 located at the rear end of the main reactor 200. The front-end sludge interception tank 100 is used to intercept sludge from the wastewater before it enters the main reactor 200, and the rear-end sludge interception tank 300 is used to intercept sludge from the wastewater exiting the main reactor 200. The main reactor 200 cultivates sludge specifically for the carbon reduction reaction and is equipped with an aeration system 201.

[0021] In the high-efficiency carbon reduction reactor of this invention embodiment, the front-end sludge interception tank 100 can be a sedimentation tank, a filter tank, or a membrane tank; the rear-end sludge interception tank 300 can also be a sedimentation tank, a filter tank, or a membrane tank. Specifically, when the front-end sludge interception tank 100 is a sedimentation tank, it is an inclined tube sedimentation tank or a vertical flow sedimentation tank; when the front-end sludge interception tank 100 is a filter tank, it is equipped with a high-pressure air backwashing system for backwashing; when the front-end sludge interception tank 100 is a membrane tank, it adopts a double membrane tank structure, and the main reactor and the membrane tank are constructed separately. When the rear-end sludge interception tank 300 is a sedimentation tank, it is an inclined tube sedimentation tank or a vertical flow sedimentation tank; when the rear-end sludge interception tank 300 is a filter tank, it is equipped with a high-pressure air backwashing system for backwashing; when the rear-end sludge interception tank 300 is a membrane tank, it adopts a double membrane tank structure, and the main reactor and the membrane tank are constructed separately.

[0022] In the high-efficiency carbon reduction reactor of this invention embodiment, the front-end sludge interception tank 100 is connected to a front-end sludge discharge facility 101 for discharging the sludge intercepted in the tank, and the rear-end sludge interception tank 300 is connected to a rear-end sludge discharge facility 301 for discharging the sludge intercepted in the tank. The front-end sludge discharge facility 101 and the rear-end sludge discharge facility 301 can be connected to a wastewater treatment system. In addition, the rear-end sludge discharge facility 301 can be connected to a sludge return facility 302, which is used to return the sludge discharged from the rear-end sludge discharge facility 301 to the main reactor 200, with a sludge return ratio of 1 to 3 times.

[0023] In the high-efficiency carbon reduction reactor of this embodiment, the main reactor 200 adopts a closed structure; here, "closed structure" does not refer to a completely closed structure, but rather, relative to a typical open-top reactor, the main reactor 200 is equipped with a cover plate at its top. Additionally, the top of the main reactor 200 is provided with a vent pipe 202 and a foam discharge pipe 203, and the main reactor 200 discharges water through a guide pipe. The closed structure ensures a stable reaction environment, while the vent pipe 202 and the foam discharge pipe 203 address the pressure and foam issues arising from the closed environment.

[0024] In the high-efficiency carbon reduction reactor of this invention embodiment, a sludge baffle 205 is provided on the top of the main reactor 200 to prevent excessive sludge outflow; a packing layer 204 is provided inside the main reactor 200, and the packing layer 204 is located above the aeration system 201.

[0025] The high-efficiency carbon reduction reactor of this invention also includes an online monitoring system and an automatic control system. The online monitoring system includes a temperature sensor, a pH meter, a sludge concentration meter, and a COD meter. Cr Sensors and dissolved oxygen sensors, along with an automatic adjustment system, are used to monitor temperature, pH, sludge concentration, and COD. Cr Automatic regulation of dissolved oxygen. Specifically, the upstream sludge interception tank 100 is equipped with COD... Cr A COD sensor is installed in the downstream sludge interception tank 300. Cr The main reactor 200 is equipped with a temperature sensor (T), a pH meter, a sludge concentration meter (MLSS), and a dissolved oxygen sensor (DO). This embodiment of the invention ensures fully automated and stable operation of the nitrification reactor through an online monitoring system and an automatic control system.

[0026] In specific operation, the operating parameters of the main reactor in the high-efficiency carbon reduction reactor of this invention embodiment include: Main reactor influent: COD Cr <1000mg / L and C / TKN>3; Reaction temperature: 15~35℃; Dissolved oxygen (DO): 0.6~2.5 mg / L; pH value: 6.5~8.5; Sludge concentration: 5000~20000 mg / L; Sludge loading: 0.5~1.0 kg COD / (kg MLSS·d); Hydraulic residence time: 4~6h.

[0027] Compared to existing technologies, the advantages of the high-efficiency nitration reactor in this invention are: The high-efficiency carbon reduction reactor provided by this invention has a front-end sludge interception tank at the front end of the main reactor to intercept sludge from the effluent of the previous treatment unit, so as to avoid affecting the main reactor and causing sludge mixing. A rear-end sludge interception tank is set at the rear end of the main reactor to intercept sludge from the effluent of the main reactor, so as to avoid sludge affecting the next treatment unit. The sludge intercepted in the rear-end sludge interception tank can be returned to the main reactor for continued use. The setting of the front-end sludge interception tank and the rear-end sludge interception tank can facilitate the management of sludge concentration and sludge age, as well as improve the anti-interference ability.

[0028] In the main reactor, a dedicated sludge for carbon reduction reaction is used. The sludge contains a very high proportion of heterotrophic bacteria or only heterotrophic bacteria. Theoretically, the proportion of heterotrophic bacteria can reach 90% to 100%. The cultivation and use of dedicated sludge for carbon reduction reaction greatly increases the reaction efficiency and also helps to reduce interference from other reactions. Using dedicated sludge can greatly increase the sludge concentration without worrying about sludge bulking, effectively reducing the risk of sludge bulking.

[0029] In summary, the high-efficiency carbon reduction reactor of the present invention has the advantages of high reaction efficiency and strong anti-interference ability. It can significantly increase the sludge concentration without worrying about sludge bulking, effectively reducing the risk of sludge bulking. Furthermore, the sludge age and sludge concentration are easy to control, and the operating conditions are easy to manage.

[0030] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A high-efficiency carbon reduction reactor, characterized in that, It includes a main reactor, a front sludge interception tank located at the front end of the main reactor, and a rear sludge interception tank located at the rear end of the main reactor. The front sludge interception tank is used to intercept sludge in the wastewater before it enters the main reactor, and the rear sludge interception tank is used to intercept sludge in the wastewater exiting the main reactor. The main reactor cultivates sludge specifically for carbon reduction reaction and is equipped with an aeration system.

2. The high-efficiency carbon reduction reactor as described in claim 1, characterized in that, The front-end sludge interception tank is a sedimentation tank, a filtration tank, or a membrane tank; the rear-end sludge interception tank is a sedimentation tank, a filtration tank, or a membrane tank.

3. The high-efficiency carbon reduction reactor as described in claim 2, characterized in that, When the front-end sludge interception tank is a sedimentation tank, the sedimentation tank is an inclined tube sedimentation tank or a vertical flow sedimentation tank; when the front-end sludge interception tank is a filter tank, the filter tank is equipped with a high-pressure air backwashing system for backwashing the filter tank; when the front-end sludge interception tank is a membrane tank, the membrane tank adopts a double membrane tank structure, and the main reactor and the membrane tank are constructed separately.

4. The high-efficiency carbon reduction reactor as described in claim 2, characterized in that, When the downstream sludge interception tank is a sedimentation tank, the sedimentation tank is an inclined tube sedimentation tank or a vertical flow sedimentation tank; when the downstream sludge interception tank is a filter tank, the filter tank is equipped with a high-pressure air backwashing system for backwashing the filter tank; when the downstream sludge interception tank is a membrane tank, the membrane tank adopts a double membrane tank structure, and the main reactor and the membrane tank are constructed separately.

5. The high-efficiency carbon reduction reactor as described in claim 1, characterized in that, The front-end sludge interception tank is connected to a front-end sludge discharge facility for discharging the sludge intercepted in the tank, and the rear-end sludge interception tank is connected to a rear-end sludge discharge facility for discharging the sludge intercepted in the tank; the rear-end sludge discharge facility is connected to a sludge return facility, which is used to return the sludge discharged by the rear-end sludge discharge facility to the main reactor.

6. The high-efficiency carbon reduction reactor as described in claim 1, characterized in that, The main reactor adopts a closed structure, and the top of the main reactor is equipped with an vent pipe and a foam discharge pipe. The main reactor discharges water through a guide pipe.

7. The high-efficiency carbon reduction reactor as described in claim 1, characterized in that, The top of the main reactor is equipped with a sludge baffle to prevent excessive sludge outflow; the interior of the main reactor is equipped with a packing layer, which is located above the aeration system.

8. The high-efficiency carbon reduction reactor as described in claim 1, characterized in that, The high-efficiency carbon reduction reactor also includes an online monitoring system and an automatic adjustment system. The online monitoring system includes a temperature sensor, a pH meter, a sludge concentration meter, and a COD meter. Cr Sensors and dissolved oxygen sensors, the automatic adjustment system is used to control temperature, pH, sludge concentration, COD Cr Automatic regulation of dissolved oxygen.

9. The high-efficiency carbon reduction reactor as described in claim 1, characterized in that, The upstream sludge interception tank is equipped with COD Cr The sensor, the downstream sludge interception tank is equipped with COD Cr The main reactor is equipped with sensors, including a temperature sensor, a pH meter, a sludge concentration meter, and a dissolved oxygen sensor.

10. The high-efficiency carbon reduction reactor according to any one of claims 1-9, characterized in that, The operating parameters used in the main reactor include: Main reactor influent: COD Cr <1000mg / L and C / TKN>3; Reaction temperature: 15~35℃; Dissolved oxygen (DO): 0.6~2.5 mg / L; pH value: 6.5~8.5; Sludge concentration: 5000~20000 mg / L; Sludge loading: 0.5~1.0 kg COD / (kg MLSS·d); Hydraulic residence time: 4~6h.

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