A full-automatic integrated rural decentralized sewage treatment system and method

Abstract

The present application belongs to sewage treatment technical field, especially to a kind of full-automatic integrated rural decentralized sewage treatment system, including treatment tank, the treatment tank is fixedly installed with partition, the partition is divided into five independent compartments in treatment tank: anaerobic zone, anoxic zone, aerobic zone, sedimentation zone and clear water zone, anaerobic zone, anoxic zone, aerobic zone, sedimentation zone, clear water zone are fan-shaped distribution, anaerobic zone, anoxic zone, aerobic zone, sedimentation zone, clear water zone are connected with each other by pipeline between each level, and two ends of the pipeline are fixedly installed at the top of upper area and the bottom of lower area respectively, and aerobic zone is fixedly installed with aeration system and temperature sensor.The advantages are that biological nitrogen and phosphorus removal is combined with ultraviolet physical disinfection, there is no chemical residue, and it will not harm human health;only three small power equipment, without using mechanical equipment such as agitator, can be directly replaced after damage, without waiting for maintenance personnel to repair.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a fully automated integrated rural decentralized wastewater treatment system and method. Background Technology

[0002] In villages where farmers live scattered, have small populations, complex terrain, and where pipe networks are difficult to fully cover, and where it is difficult to connect to urban main pipe networks due to their distance from cities, sewage treatment models such as single-household, joint-household, and small-area independent treatment are generally adopted.

[0003] Existing decentralized rural sewage treatment systems typically use chemicals for disinfection, which can easily leave chemical residues. These chemicals themselves can also harm the human body, resulting in poor hygiene and safety. Furthermore, existing systems use a large number of mechanical devices such as agitators, making it difficult to clean up in remote areas when the equipment breaks down.

[0004] To address the aforementioned issues, we propose a fully automated, integrated decentralized rural wastewater treatment system and method. Summary of the Invention

[0005] The purpose of this invention is to solve the problems in the background art by proposing a fully automated integrated rural decentralized sewage treatment system and method.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a fully automatic integrated rural decentralized sewage treatment system and method, comprising a treatment tank, wherein a partition plate is fixedly installed inside the treatment tank, the partition plate dividing the treatment tank into five independent compartments: an anaerobic zone, an anoxic zone, an aerobic zone, a sedimentation zone, and a clear water zone, wherein the anaerobic zone, anoxic zone, aerobic zone, sedimentation zone, and clear water zone are arranged in a fan shape, and the anaerobic zone, anoxic zone, aerobic zone, sedimentation zone, and clear water zone are interconnected by pipes, and the two ends of the pipes are respectively fixedly installed at the top of the upper zone and the bottom of the lower zone, wherein the aerobic zone is fixedly installed with an aeration system and a temperature sensor, and the clear water zone is fixedly installed with an ultraviolet disinfection lamp and a lift pump.

[0007] In the aforementioned fully automated integrated rural decentralized sewage treatment system, the aeration system includes an air pump, on which an aeration head and an air distribution branch pipe are fixedly installed. A first air lift pipe and a second air lift pipe are fixedly installed on the air distribution branch pipe. The first air lift pipe connects the sedimentation zone and the anaerobic zone, and the second air lift pipe connects the aerobic zone and the anoxic zone. A perforated pipe connected to the second air lift pipe is fixedly installed in the anoxic zone.

[0008] In the aforementioned fully automatic integrated rural decentralized sewage treatment system, the aeration head is fixedly installed at the bottom of the aerobic zone, the air pump is a silent diaphragm air pump, and a relay is fixedly installed on the air pump.

[0009] In the aforementioned fully automated integrated rural decentralized sewage treatment system, the ultraviolet disinfection lamp is a low-pressure mercury lamp, which is installed in the lower middle part of the clear water zone and is completely submerged in the water. The ultraviolet disinfection lamp is connected in series with the booster pump.

[0010] In the aforementioned fully automated integrated rural decentralized sewage treatment system, the lift pump is a small submersible pump, and a float level switch is fixedly installed on the lift pump.

[0011] A method for using a fully automated integrated rural decentralized sewage treatment system includes the following steps: S1. After entering the anaerobic zone, the wastewater undergoes anaerobic phosphorus release and hydrolysis acidification. The wastewater at the top of the anaerobic zone flows into the anoxic zone, and the effluent from the top of the anoxic zone enters the aerobic zone. An air pump pumps oxygen into the aerobic zone through aeration heads to oxidize the organic matter in the wastewater. At the same time, a relay causes the air pump to start intermittently, maintaining an air-to-water ratio of 5:1 to 10:1 and controlling the DO in the aerobic zone at 2 to 4 mg / L. After the organic matter is oxidized, the wastewater at the top of the aerobic zone enters the sedimentation zone, where solid matter settles and forms cone-shaped sludge at the bottom. The clear liquid at the top of the sedimentation zone enters the clear water zone, where it is disinfected by ultraviolet disinfection lamps and then discharged by a booster pump. S2. The gas distribution branch pipe allows the bottom sludge of the sedimentation zone to flow back to the anaerobic zone through the first riser pipe, so as to further anaerobic phosphorus release and hydrolysis acidification of the sludge, and hydrolyze and eliminate organic sludge. S3. The oxygen introduced into the aerobic zone will nitrify the nitrogen and ammonia compounds in the organic matter. The gas distribution branch pipe returns the mixed liquor from the aerobic zone to the anoxic zone through the second riser pipe. The anoxic zone denitrifies the mixed liquor. At the same time, the airflow will be ejected from the pores of the perforated pipe. The tiny pores increase the air pressure, allowing the gas to be ejected quickly, forming bubbles that float upwards. The rising bubbles drive the surrounding water to form vertical convection and horizontal circulation, turning the entire pool water over, allowing the sludge and water to come into full contact, achieving a stirring effect. S4. When the clear liquid in the upper layer of the sedimentation zone enters the clear water zone, it will cause the liquid level in the clear water zone to rise, thereby completely immersing the ultraviolet disinfection lamp. At the same time, the rise in liquid level will open the float level switch, start the lift pump to drain the water, and also start the ultraviolet disinfection lamp connected in series with the lift pump to carry out sterilization and disinfection. By lighting the lamp only when draining the water, the service life of the lamp tube is extended. S5. As the liquid is discharged, the liquid level drops. Once the liquid level drops to a low level, the booster pump shuts off.

[0012] In the above-mentioned method of using a fully automated integrated rural decentralized sewage treatment system, the sewage flows from the upper end of the upper chamber into the lower chamber by gravity.

[0013] Compared with existing technologies, the advantages of this fully automated integrated rural decentralized sewage treatment system and method are as follows: 1. Completely chemical-free: Combining biological denitrification and phosphorus removal with ultraviolet physical disinfection, there are no chemical residues and it will not harm human health.

[0014] 2. Minimalist design: Only three low-power devices (air pump, lift pump, and UV lamp) are used. There are no backflow pumps, no mud pumps, and no agitators or other mechanical equipment. Damaged equipment can be directly replaced without waiting for maintenance personnel.

[0015] 3. Temperature-water volume self-adaptation: Parameters can be adapted through seasonal adjustments and water volume control.

[0016] 4. High hygiene and safety: The ultraviolet lamp effectively kills bacteria and viruses, and the effluent can be used for irrigation or discharged into sensitive water bodies.

[0017] 5. High integration: All treatment and disinfection are completed in a single tank with a diameter of 1.5m. The device has a small footprint, can be buried underground, and is more convenient to use. Attached Figure Description

[0018] Figure 1 This is a system block diagram of a fully automated integrated rural decentralized sewage treatment system and method proposed in this invention. Detailed Implementation

[0019] The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0020] Reference Figure 1 A fully automated integrated decentralized rural sewage treatment system and method includes a treatment tank. The treatment tank is characterized by a partition plate fixedly installed inside, dividing the tank into five independent compartments: an anaerobic zone, an anoxic zone, an aerobic zone, a sedimentation zone, and a clear water zone. These compartments are arranged in a fan shape. Each compartment is interconnected by a pipe, with both ends of the pipe fixedly installed at the top of the upper compartment and the bottom of the lower compartment, respectively. The aerobic zone is equipped with an aeration system and a temperature sensor, while the clear water zone is equipped with an ultraviolet disinfection lamp and a booster pump. The aeration system includes an air pump, on which an aeration head and an air distribution branch pipe are fixedly installed. The aeration head is installed at the bottom of the aerobic zone, producing small bubbles with high oxygen utilization. A first air lift pipe and a second air lift pipe are fixedly installed on the air distribution branch pipe. The first air lift pipe connects the sedimentation zone and the anaerobic zone, and the second air lift pipe connects the aerobic zone and the anoxic zone. A perforated pipe connected to the second air lift pipe is fixedly installed in the anoxic zone. The aeration head is fixedly installed at the bottom of the aerobic zone. The air pump is a silent diaphragm air pump, and a relay is fixedly installed on the air pump. The ultraviolet disinfection lamp is a low-pressure mercury lamp, or a UVC-LED lamp. The ultraviolet disinfection lamp is installed in the lower middle part of the clean water area and is completely submerged in water. The ultraviolet disinfection lamp is connected in series with the lift pump and is only turned on when draining water to extend the lamp life. The ultraviolet disinfection lamp can be installed horizontally or vertically. The lift pump is a small submersible pump. A float level switch is fixedly installed on the lift pump. When the liquid level rises to the high level, the switch opens and the lift pump starts. When the liquid level drops to the low level, the switch closes and the lift pump shuts down. A method for using a fully automated integrated rural decentralized sewage treatment system includes the following steps: S1. After entering the anaerobic zone, the wastewater undergoes anaerobic phosphorus release and hydrolysis acidification. The wastewater at the top of the anaerobic zone flows into the anoxic zone, and the effluent from the top of the anoxic zone enters the aerobic zone. An air pump pumps oxygen into the aerobic zone through aeration heads to oxidize the organic matter in the wastewater. At the same time, a relay causes the air pump to start intermittently, maintaining an air-to-water ratio of 5:1 to 10:1 and controlling the DO in the aerobic zone at 2 to 4 mg / L. After the organic matter is oxidized, the wastewater at the top of the aerobic zone enters the sedimentation zone, where solid matter settles and forms cone-shaped sludge at the bottom. The clear liquid at the top of the sedimentation zone enters the clear water zone, where it is disinfected by ultraviolet disinfection lamps and then discharged by a booster pump. S2. The gas distribution branch pipe allows the bottom sludge of the sedimentation zone to flow back to the anaerobic zone through the first riser pipe, so as to further anaerobic phosphorus release and hydrolysis acidification of the sludge, and hydrolyze and eliminate organic sludge. S3. The oxygen introduced into the aerobic zone will nitrify the nitrogen and ammonia compounds in the organic matter. The gas distribution branch pipe returns the mixed liquor from the aerobic zone to the anoxic zone through the second riser pipe. The anoxic zone denitrifies the mixed liquor. At the same time, the airflow will be ejected from the pores of the perforated pipe. The tiny pores increase the air pressure, allowing the gas to be ejected quickly, forming bubbles that float upwards. The rising bubbles drive the surrounding water to form vertical convection and horizontal circulation, turning the entire pool water over, allowing the sludge and water to come into full contact, achieving a stirring effect. S4. When the clear liquid in the upper layer of the sedimentation zone enters the clear water zone, it will cause the liquid level in the clear water zone to rise, thereby completely immersing the ultraviolet disinfection lamp. At the same time, the rise in liquid level will open the float level switch, start the lift pump to drain the water, and also start the ultraviolet disinfection lamp connected in series with the lift pump to carry out sterilization and disinfection. By lighting the lamp only when draining the water, the service life of the lamp tube is extended. S5. As the liquid is discharged, the liquid level drops. Once the liquid level drops to the low water level, the booster pump shuts off. The wastewater flows from the top of the upper chamber into the lower chamber by gravity, meaning that no equipment is needed to allow the wastewater to flow to the lower chamber.

[0021] In this invention, during wastewater treatment, the wastewater enters the anaerobic zone. After anaerobic phosphorus release and hydrolysis acidification, the wastewater at the top of the anaerobic zone flows into the anoxic zone. The effluent from the top of the anoxic zone enters the aerobic zone. An air pump pumps oxygen into the aerobic zone through aeration heads to oxidize the organic matter in the wastewater. At the same time, a relay causes the air pump to start intermittently, maintaining an air-to-water ratio of 5:1 to 10:1 and controlling the dissolved oxygen (DO) in the aerobic zone at 2 to 4 mg / L. After the organic matter is oxidized, the wastewater at the top of the aerobic zone enters the sedimentation zone, where solid matter settles and forms a cone-shaped sludge at the bottom. The clear liquid at the top of the sedimentation zone enters the clear water zone. After being sterilized by ultraviolet disinfection lamps in the clear water zone, it is discharged through a lift pump. During this process, the aeration branch pipe, through the first riser pipe, allows the bottom sludge of the sedimentation zone to flow back to the anaerobic zone for further anaerobic phosphorus release and hydrolysis acidification, thus eliminating the organic sludge. At the same time, the oxygen introduced into the aerobic zone causes the nitrogen and ammonia compounds in the organic matter to nitrify. The aeration branch pipe, through the second riser pipe, returns the mixed liquor from the aerobic zone to the anoxic zone, where it undergoes denitrification. Simultaneously, airflow is ejected from the perforated pipe. The tiny pores increase the air pressure, allowing the gas to be ejected quickly, forming bubbles that float upwards. The rising bubbles drive the surrounding water to form vertical convection and horizontal circulation, causing the entire pool of water to churn and ensuring full contact between the sludge and the water, thus achieving a stirring effect and facilitating the denitrification of the mixed liquor. Furthermore, when the clear liquid in the upper layer of the sedimentation zone enters the clear water zone, it will cause the liquid level in the clear water zone to rise, thereby completely immersing the ultraviolet disinfection lamp. At the same time, the rise in the liquid level will open the float level switch, start the lift pump to drain the water, and also start the ultraviolet disinfection lamp connected in series with the lift pump to carry out sterilization and disinfection. By lighting the lamp only when draining the water, the service life of the lamp tube can be extended. Finally, as the liquid is discharged, the liquid level drops, and once the liquid level reaches a low level, the booster pump shuts off.

[0022] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fully automated integrated rural decentralized sewage treatment system, comprising a treatment tank, characterized in that, The treatment tank is fixedly equipped with a partition plate, which divides the tank into five independent compartments: an anaerobic zone, an anoxic zone, an aerobic zone, a sedimentation zone, and a clear water zone. The anaerobic zone, anoxic zone, aerobic zone, sedimentation zone, and clear water zone are arranged in a fan shape. The anaerobic zone, anoxic zone, aerobic zone, sedimentation zone, and clear water zone are interconnected by pipes, and the two ends of the pipes are fixedly installed at the top of the upper zone and the bottom of the lower zone, respectively. The aerobic zone is fixedly equipped with an aeration system and a temperature sensor, and the clear water zone is fixedly equipped with an ultraviolet disinfection lamp and a booster pump.

2. The fully automated integrated rural decentralized sewage treatment system according to claim 1, characterized in that, The aeration system includes an air pump, on which an aeration head and an air distribution branch pipe are fixedly installed. A first air lift pipe and a second air lift pipe are fixedly installed on the air distribution branch pipe. The first air lift pipe connects the sedimentation zone and the anaerobic zone, and the second air lift pipe connects the aerobic zone and the anoxic zone. A perforated pipe connected to the second air lift pipe is fixedly installed in the anoxic zone.

3. The fully automated integrated rural decentralized sewage treatment system according to claim 2, characterized in that, The aeration head is fixedly installed at the bottom of the aerobic zone, and the air pump is a silent diaphragm air pump, with a relay fixedly installed on the air pump.

4. The fully automated integrated rural decentralized sewage treatment system according to claim 1, characterized in that, The ultraviolet disinfection lamp is a low-pressure mercury lamp. The ultraviolet disinfection lamp is installed in the lower middle part of the clear water zone and is completely submerged in water. The ultraviolet disinfection lamp is connected in series with the booster pump.

5. The fully automated integrated rural decentralized sewage treatment system according to claim 1, characterized in that, The booster pump is a small submersible pump, and a float level switch is fixedly installed on the booster pump.

6. The method of using a fully automated integrated rural decentralized sewage treatment system according to claim 1, characterized in that, Includes the following steps: S1. After entering the anaerobic zone, the wastewater undergoes anaerobic phosphorus release and hydrolysis acidification. The wastewater at the top of the anaerobic zone flows into the anoxic zone, and the effluent from the top of the anoxic zone enters the aerobic zone. An air pump pumps oxygen into the aerobic zone through aeration heads to oxidize the organic matter in the wastewater. At the same time, a relay causes the air pump to start intermittently, maintaining an air-to-water ratio of 5:1 to 10:1 and controlling the DO in the aerobic zone at 2 to 4 mg / L. After the organic matter is oxidized, the wastewater at the top of the aerobic zone enters the sedimentation zone, where solid matter settles and forms cone-shaped sludge at the bottom. The clear liquid at the top of the sedimentation zone enters the clear water zone, where it is disinfected by ultraviolet disinfection lamps and then discharged by a booster pump. S2. The gas distribution branch pipe allows the bottom sludge of the sedimentation zone to flow back to the anaerobic zone through the first riser pipe, so as to further anaerobic phosphorus release and hydrolysis acidification of the sludge, and hydrolyze and eliminate organic sludge. S3. The oxygen introduced into the aerobic zone will nitrify the nitrogen and ammonia compounds in the organic matter. The gas distribution branch pipe returns the mixed liquor from the aerobic zone to the anoxic zone through the second riser pipe. The anoxic zone denitrifies the mixed liquor. At the same time, the airflow will be ejected from the pores of the perforated pipe. The tiny pores increase the air pressure, allowing the gas to be ejected quickly, forming bubbles that float upwards. The rising bubbles drive the surrounding water to form vertical convection and horizontal circulation, turning the entire pool water over, allowing the sludge and water to come into full contact, achieving a stirring effect. S4. When the clear liquid in the upper layer of the sedimentation zone enters the clear water zone, it will cause the liquid level in the clear water zone to rise, thereby completely immersing the ultraviolet disinfection lamp. At the same time, the rise in liquid level will open the float level switch, start the lift pump to drain the water, and also start the ultraviolet disinfection lamp connected in series with the lift pump to carry out sterilization and disinfection. By lighting the lamp only when draining the water, the service life of the lamp tube is extended. S5. As the liquid is discharged, the liquid level drops. Once the liquid level drops to a low level, the booster pump shuts off.

7. The method of using a fully automated integrated rural decentralized sewage treatment system according to claim 6, characterized in that, The wastewater flows from the upper part of the upper chamber into the lower chamber by gravity.

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