Anaerobic tank for sewage treatment of carbon source enriched activated sludge

Abstract

The utility model discloses an anaerobic tank for carbon source enriched activated sludge sewage treatment, which comprises an anaerobic tank body, a mixing mechanism and a plurality of top covers, the bottom in a reaction bin is filled with a microbial immobilization carrier, and a sludge discharge component and a drain pipe are arranged in a sedimentation bin. Through the arrangement of the mixing bin, sewage and activated sludge are fully mixed, so that a carbon source in the sewage can be recognized and utilized by microorganisms in the activated sludge in time, and a microorganism immobilization carrier in the reaction bin is driven to be in a fluidized state through the arranged reaction stirrer; according to the present invention, by arranging the microbial immobilization carrier, the anaerobic microorganisms attached to the microbial immobilization carrier can continuously and fully contact the carbon source in the sewage, and by arranging the flow baffle plate, the contact time of the microorganisms and the carbon source is prolonged so as to improve the carbon source enrichment and degradation conversion efficiency and promote the anaerobic reaction; enough quantity of active microorganisms are always maintained in the mixing bin, and the carbon source enrichment and sewage treatment efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an anaerobic tank for carbon source enrichment activated sludge sewage treatment. Background Art

[0002] With the increase of environmental awareness and the improvement of sewage treatment standards, the performance requirements for sewage treatment equipment are becoming increasingly stringent. In the process of using anaerobic tanks for carbon source enrichment and activated sludge to treat sewage, the existing technology has many shortcomings.

[0003] In the prior art, the structure of the traditional anaerobic tank is not conducive to the full mixing of sewage and activated sludge, resulting in low carbon source utilization efficiency and insufficient contact between microorganisms and carbon sources; moreover, the sedimentation tank cannot effectively maintain the number and activity of microorganisms during mixing.

[0004] In view of this, the present invention is proposed to solve the above technical problems. Utility Model Content

[0005] The utility model aims to provide an anaerobic tank for carbon source enrichment activated sludge sewage treatment, so as to solve the technical problems of low carbon source utilization efficiency and insufficient contact between microorganisms and carbon sources in the prior art anaerobic tanks.

[0006] The technical solution of the utility model is: an anaerobic tank for carbon source enrichment activated sludge sewage treatment, comprising:

[0007] The anaerobic tank body is a rectangular structure, and two baffles are arranged in the anaerobic tank body at intervals, and a connecting groove is opened on the upper end of the baffle to form a mixing chamber, a reaction chamber and a sedimentation chamber. The bottom of the reaction chamber is filled with a microorganism immobilization carrier, and a mud discharge component and a drain pipe are arranged in the sedimentation chamber. The mud discharge component is connected with the mixing chamber, and a water distributor is arranged at the upper end of the mixing chamber. A central controller is arranged on the outer wall of the anaerobic tank body;

[0008] The mixing mechanism includes a submersible agitator arranged in the mixing chamber and a reaction agitator arranged in the reaction chamber. The reaction agitator is provided with a plurality of baffles at intervals in the circumferential direction. The baffles are arranged at the bottom of the reaction chamber.

[0009] Multiple top covers are respectively arranged at the upper ends of the mixing bin, the reaction bin and the precipitation bin.

[0010] Furthermore, the submersible agitator is fixedly arranged on the corresponding top cover, and the stirring blades of the submersible agitator are located in the mixing chamber.

[0011] Furthermore, the reaction agitator is fixedly arranged on the corresponding top cover, and the stirring blades of the reaction agitator are located in the reaction chamber.

[0012] Furthermore, the microorganism immobilization carrier is a granular structure, and the microorganism immobilization carrier is used to provide a space for the microorganisms to attach and grow.

[0013] Furthermore, a heating coil is arranged in the baffle, the heating coil is connected to an external circulating hot water pipeline through a circulating water pump, and a temperature sensor is arranged in the reaction chamber;

[0014] A pH sensor and a dosing device are also provided in the reaction chamber. The pH sensor is used to monitor the pH value in the reaction chamber. The temperature sensor and the pH sensor are respectively connected to the central controller via electrical signals. The circulating water pump and the dosing device are respectively connected to the central controller via electrical signals.

[0015] Furthermore, the mud discharge assembly includes a T-shaped sedimentation tank, the lower end of the T-shaped sedimentation tank is connected to a return pipe, the end of the return pipe away from the T-shaped sedimentation tank is connected to the mixing bin, and the return pipe is connected to a return pump.

[0016] The drainage pipe is located in the T-shaped sedimentation tank, and a water pump is connected to the drainage pipe.

[0017] Furthermore, each top cover is provided with an exhaust hole, the exhaust hole is connected to an exhaust pipe, multiple exhaust pipes are connected to the same air duct, a one-way valve is provided on the exhaust pipe, and the end of the air duct away from the exhaust pipe is connected to an external gas storage tank.

[0018] By adopting the above technical solution, the utility model has the following beneficial effects:

[0019] 1. Through the setting of the mixing tank, the sewage is fully mixed with the activated sludge after entering the mixing tank, so that the carbon source in the sewage can be timely identified and utilized by the microorganisms in the activated sludge, paving the way for carbon source enrichment and degradation in the reaction tank.

[0020] 2. The sewage in the mixing chamber enters the reaction chamber through the connecting groove. The reaction agitator is used to drive the microbial immobilization carrier in the reaction chamber to a fluidized state, so that the microbial immobilization carrier rolls in the reaction chamber, so that the anaerobic microorganisms attached to the microbial immobilization carrier can continuously and fully contact the carbon source in the sewage. The baffle is used to extend the contact time between the microorganism and the carbon source, thereby improving the efficiency of carbon source enrichment and degradation conversion, and promoting the anaerobic reaction.

[0021] 3. The sewage in the reaction chamber enters the sedimentation chamber through the connecting tank for sedimentation. The precipitated sludge is returned to the mixing chamber through the sludge discharge assembly, ensuring that a sufficient number of active microorganisms are always maintained in the mixing chamber, thereby improving carbon source enrichment and sewage treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are part of this application and are used to provide a further understanding of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model, but do not constitute an improper limitation on the utility model. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0023] Figure 1 A schematic diagram of the structure of an anaerobic tank for carbon source enrichment activated sludge wastewater treatment provided in an embodiment of the present application;

[0024] Figure 2 for Figure 1 A schematic diagram of the structure of an anaerobic tank for carbon source enrichment activated sludge wastewater treatment from another perspective is provided;

[0025] Figure 3 A schematic diagram of the structure of an anaerobic tank for carbon source enrichment activated sludge wastewater treatment provided in an embodiment of the present application with the top cover removed;

[0026] Figure 4 A schematic diagram of the installation of a T-shaped sedimentation tank and a return pipe of an anaerobic tank for carbon source enrichment activated sludge wastewater treatment provided in an embodiment of the present application.

[0027] Figure numerals: 1. anaerobic tank body; 2. water distributor; 3. mixing chamber; 4. reaction chamber; 5. sedimentation chamber; 6. submersible agitator; 7. reaction agitator; 8. T-type sedimentation tank; 9. reflux pipe; 10. drain pipe; 11. connecting tank; 12. top cover; 13. exhaust pipe; 14. air guide pipe; 15. baffle.

[0028] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0029] The specific implementation modes of the present utility model are further described in detail with reference to the accompanying drawings.

[0030] See also Figures 1 to 4As shown, the embodiment of the present application provides an anaerobic tank for carbon source enrichment activated sludge sewage treatment, including: an anaerobic tank body 1, a mixing mechanism and a plurality of top covers 12, the anaerobic tank body 1 is a rectangular structure, and two baffles are arranged at intervals in the anaerobic tank body 1, and a connecting groove 11 is opened at the upper end of the baffle to form a mixing chamber 3, a reaction chamber 4 and a sedimentation chamber 5, the bottom of the reaction chamber 4 is filled with a microbial immobilization carrier, the mixing chamber 3 is provided with activated sludge, and the sedimentation chamber 5 is provided with a sludge discharge assembly and a drain pipe 10, the sludge discharge assembly is connected to the mixing chamber 3, and a water distributor 2 is arranged at the upper end of the mixing chamber 3, and a central controller is arranged on the outer wall of the anaerobic tank body 1, the mixing mechanism includes a submersible agitator 6 arranged in the mixing chamber 3 and a reaction agitator 7 arranged in the reaction chamber 4, and the reaction agitator 7 is provided with a plurality of baffles 15 at intervals in the circumferential direction. The baffles 15 are arranged at the bottom of the reaction chamber 4, and the plurality of top covers 12 are respectively arranged at the upper ends of the mixing chamber 3, the reaction chamber 4 and the sedimentation chamber 5.

[0031] In the above scheme, the mixing chamber 3 is set up so that after the sewage enters the mixing chamber 3, the sewage is fully mixed with the activated sludge, so that the carbon source in the sewage can be timely recognized and utilized by the microorganisms in the activated sludge, paving the way for carbon source enrichment and degradation in the reaction chamber 4. The sewage in the mixing chamber 3 enters the reaction chamber 4 through the connecting groove 11, and the microorganism immobilization carrier in the reaction chamber 4 is driven to be fluidized by the reaction agitator 7, so that the microorganism immobilization carrier rolls in the reaction chamber 4, so that the anaerobic microorganisms attached to the microorganism immobilization carrier can continuously and fully contact the carbon source in the sewage. The baffle 15 is set up to extend the contact time between the microorganism and the carbon source, thereby improving the efficiency of carbon source enrichment and degradation conversion, and promoting the anaerobic reaction. The sewage in the reaction chamber 4 enters the sedimentation chamber 5 through the connecting groove 11 for sedimentation, and the precipitated sludge is returned to the mixing chamber 3 through the sludge discharge assembly, ensuring that a sufficient number of active microorganisms are always maintained in the mixing chamber 3, thereby improving the carbon source enrichment and sewage treatment efficiency.

[0032] In some possible implementations, see Figures 1 to 3 As shown, the submersible agitator 6 is fixedly arranged on the corresponding top cover 12, and the stirring blades of the submersible agitator 6 are located in the mixing chamber 3. The submersible agitator 6 is driven by an external motor. The stirring blades of the submersible agitator 6 adopt twisted blades. When the external motor drives the stirring blades to rotate, the sewage in the mixing chamber 3 is driven to produce an up and down circulating water flow, so that the sewage and the activated sludge are fully mixed.

[0033] In some possible implementations, see Figure 1 and Figure 2As shown, the reaction agitator 7 is fixedly arranged on the corresponding top cover 12, the reaction agitator 7 is driven by an external drive motor, and the stirring blades of the reaction agitator 7 are located in the reaction chamber 4. The top cover 12 is used as a gas collecting cover and is made of fiberglass, which has the characteristics of light weight, high strength and corrosion resistance. The bottom edge of the top cover 12 is tightly fitted with the top edge of the anaerobic tank body 1 and is sealed by a rubber sealing ring. The top of the top cover 12 is arched, which is conducive to the collection of gas.

[0034] In some possible implementation schemes, the microbial immobilization carrier is a granular structure, the microbial immobilization carrier is a porous ceramic material, the particle size is between 5-10mm, and the surface carries a large number of hydrophilic genes, which not only ensures that the microbial immobilization carrier has a large specific surface area, but also facilitates the flow of water between the microbial immobilization carriers. The microbial immobilization carrier is used to provide a space for the attachment and growth of microorganisms. The microbial immobilization carrier is in a fluidized state in the reaction chamber 4, and the water flow is driven to rotate by the rotation of the stirring blades of the reaction agitator 7. The microbial immobilization carrier continuously rolls in the reaction chamber 4, so that the microorganisms can fully contact the carbon source in the sewage, thereby improving the reaction efficiency. Compared with traditional immobilization carriers, it can significantly increase the chance of contact between microorganisms and carbon sources.

[0035] In some possible implementation schemes, a heating coil is provided in the baffle, and the heating coil is connected to an external circulating hot water pipe through a circulating water pump. A temperature sensor is provided in the reaction chamber 4, and a pH sensor and a dosing device are also provided in the reaction chamber 4. The pH sensor is used to monitor the pH value in the reaction chamber 4. The temperature sensor and the pH sensor are respectively electrically connected to the central controller, and the circulating water pump and the dosing device are respectively electrically connected to the central controller.

[0036] In the above scheme, in order to provide a suitable growth environment for anaerobic microorganisms, the temperature sensor monitors the temperature in the reaction chamber 4 in real time and feeds back the monitored data to the central controller. When the temperature in the reaction chamber 4 needs to be increased, the central controller controls the circulating water pump to start. The circulating water pump starts to transport external circulating hot water to the baffle through the heating coil, thereby adjusting the temperature in the reaction chamber 4. The temperature range in the reaction chamber 4 is 30-35°C; in terms of pH adjustment, the data monitored by the pH sensor is fed back to the central controller in real time. When the pH value deviates from the appropriate range (6.5-7.5), the central controller controls the dosing device to start, and the dosing device starts to add acidic (sulfuric acid) or alkaline (sodium hydroxide) agents to the reaction chamber 4 to adjust the pH value, create a stable and suitable growth environment for anaerobic microorganisms, and improve the activity of microorganisms and carbon source enrichment efficiency.

[0037] In some possible implementations, see Figure 3 and Figure 4As shown, the mud discharge assembly includes a T-shaped sedimentation tank 8, the lower end of the T-shaped sedimentation tank 8 is connected to a return pipe 9, the end of the return pipe 9 away from the T-shaped sedimentation tank 8 is connected to the mixing bin 3, and the return pipe 9 is connected to a return pump.

[0038] In the above scheme, the activated sludge after precipitation is transported from the return pipe 9 to the mixing bin 3 through the return pump, so as to realize the recycling of the activated sludge and improve the contact and enrichment efficiency of the carbon source. The return pipe 9 is equipped with a flow regulating valve and a pressure sensor. The flow regulating valve can manually or automatically adjust the return amount of the sludge according to the treatment needs. The pressure sensor monitors the pressure in the pipeline in real time to ensure the stable operation of the return process and prevent abnormal pressure due to blockage or other faults. The T-shaped sedimentation tank 8 is convenient for collecting the sludge. The return pipe 9 is equipped with an electric sludge discharge valve. When the sludge in the sedimentation bin 5 accumulates to a certain extent, the electric sludge discharge valve is opened to transport the sludge to the mixing bin 3 through the return pipe 9, so as to realize the recycling of the sludge and improve the treatment effect of sewage.

[0039] In some possible implementations, see Figures 1 to 3 As shown, the drain pipe 10 is located in the T-shaped sedimentation tank 8, a water pump is connected to the drain pipe 10, and a water quality detector is also installed on the drain pipe 10. The water quality monitor is used to detect the water quality of the water flowing out through the drain pipe 10 to ensure that the discharged water meets the discharge standards. If it does not meet the standards, it is re-transported to the mixing bin 3 through the reflux pipe 9 for further treatment.

[0040] In some possible implementations, see Figures 1 to 3 As shown, each top cover 12 is provided with an exhaust hole, the exhaust hole is connected to an exhaust pipe 13, multiple exhaust pipes 13 are connected to the same air guide pipe 14, a one-way valve is provided on the exhaust pipe 13, and the end of the air guide pipe 14 away from the exhaust pipe 13 is connected to an external gas storage tank.

[0041] In the above scheme, the inside of the gas pipe 14 is treated with anti-corrosion, and a gas flow meter and a pressure sensor are installed on the gas pipe 14. The gas flow meter is used to monitor the production of biogas, and the pressure sensor is used to monitor the pressure in the gas pipe 14 in real time to ensure the safe transportation of gas. The one-way valve is used to prevent gas backflow. The collected biogas is transported to an external gas storage tank and purified, and can be used for power generation or heating.

[0042] This specific embodiment is merely an explanation of the utility model, and it is not a limitation of the utility model. After reading this specification, those skilled in the art can make non-creative modifications to the embodiment as needed, but as long as it is within the protection scope of the utility model, it is protected by the patent law.

Claims

1. An anaerobic tank for carbon source enrichment activated sludge sewage treatment, characterized in that: include: An anaerobic tank body (1), the anaerobic tank body (1) being of a rectangular structure, and two baffles are arranged in the anaerobic tank body (1) at intervals, and a connecting groove (11) is provided at the upper end of the baffle to form a mixing chamber (3), a reaction chamber (4) and a sedimentation chamber (5), the bottom of the reaction chamber (4) being filled with a microorganism immobilization carrier, the sedimentation chamber (5) being provided with a mud discharge component and a drainage pipe (10), the mud discharge component being connected to the mixing chamber (3), a water distributor (2) being provided at the upper end of the mixing chamber (3), and a central controller being provided on the outer wall of the anaerobic tank body (1); A mixing mechanism, the mixing mechanism comprising a submersible agitator (6) arranged in the mixing chamber (3) and a reaction agitator (7) arranged in the reaction chamber (4), the reaction agitator (7) being provided with a plurality of baffles (15) spaced apart in a circumferential direction, the baffles (15) being arranged at the bottom of the reaction chamber (4); A plurality of top covers (12), wherein the plurality of top covers (12) are respectively arranged at the upper ends of the mixing bin (3), the reaction bin (4) and the sedimentation bin (5).

2. The anaerobic tank for carbon source enrichment activated sludge sewage treatment according to claim 1, characterized in that: The submersible agitator (6) is fixedly arranged on the corresponding top cover (12), and the agitating blades of the submersible agitator (6) are located in the mixing bin (3).

3. The anaerobic tank for carbon source enrichment activated sludge sewage treatment according to claim 2, characterized in that: The reaction stirrer (7) is fixedly arranged on the corresponding top cover (12), and the stirring blades of the reaction stirrer (7) are located in the reaction chamber (4).

4. The anaerobic tank for carbon source enrichment activated sludge sewage treatment according to claim 3, characterized in that: The microorganism immobilization carrier is a granular structure, and is used to provide a space for the microorganisms to attach and grow.

5. The anaerobic tank for carbon source enrichment activated sludge sewage treatment according to claim 4, characterized in that: A heating coil is arranged in the baffle, and the heating coil is connected to an external circulating hot water pipeline via a circulating water pump, and a temperature sensor is arranged in the reaction chamber (4); A pH sensor and a dosing device are also provided in the reaction chamber (4); the pH sensor is used to monitor the pH value in the reaction chamber (4); the temperature sensor and the pH sensor are respectively electrically connected to the central controller; and the circulating water pump and the dosing device are respectively electrically connected to the central controller.

6. The anaerobic tank for carbon source enrichment activated sludge sewage treatment according to claim 1, characterized in that: The mud discharge assembly comprises a T-shaped sedimentation tank (8), the lower end of the T-shaped sedimentation tank (8) is connected to a return pipe (9), the end of the return pipe (9) away from the T-shaped sedimentation tank (8) is connected to the mixing bin (3), and the return pipe (9) is connected to a return pump.

7. The anaerobic tank for carbon source enrichment activated sludge sewage treatment according to claim 6, characterized in that: The drainage pipe (10) is located in the T-shaped sedimentation tank (8), and a water pump is connected to the drainage pipe (10).

8. The anaerobic tank for carbon source enrichment activated sludge sewage treatment according to claim 3, characterized in that: Each of the top covers (12) is provided with an exhaust hole, the exhaust hole is connected to an exhaust pipe (13), a plurality of the exhaust pipes (13) are connected to the same air guide pipe (14), a one-way valve is provided on the exhaust pipe (13), and the end of the air guide pipe (14) facing away from the exhaust pipe (13) is connected to an external gas storage tank.

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