A small sewage treatment device

Abstract

A small sewage treatment equipment, including the closed cylinder, the top of the cylinder is equipped with water inlet, the middle part of the cylinder is equipped with upper barrier net, lower barrier net, the upper barrier net and the lower barrier net form the filling space, and a plurality of suspended filler blocks are distributed in the filling space, the cylinder is provided with aerator, which is connected with air source and located below the lower barrier net, the cylinder is provided with sludge discharge port, water outlet, and the sludge discharge port is located below the lower barrier net, and the water outlet is located between the lower barrier net and the upper barrier net, and the water outlet is provided with water grate.The utility model discloses simple structure, convenient operation can peel off the active sludge of aging inactivation filler carrier, guarantees the treatment efficiency and stability.

Description

Technical Field

[0001] This utility model relates to the field of water treatment, and in particular to a small-scale sewage treatment device. Background Technology

[0002] Typical small-scale domestic wastewater treatment systems sequentially treat domestic wastewater using aerobic and anaerobic methods, generating and attaching activated sludge on a carrier. As the activated sludge ages, it accumulates on the carrier surface, resulting in low overall activity of the activated sludge and low aerobic treatment efficiency. This necessitates periodic replacement, which is time-consuming, labor-intensive, and negatively impacts wastewater treatment.

[0003] Therefore, designing a small-scale wastewater treatment device with a simple structure and stable operation is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a small-scale wastewater treatment device with a simple structure and convenient operation. This device can peel off aged and deactivated activated sludge from the packing carrier, ensuring treatment efficiency and stability.

[0005] The technical solution of this utility model is: a small sewage treatment device, including a closed cylinder, an inlet at the top of the cylinder, an upper screen and a lower screen in the middle of the cylinder, forming a filling space between the upper screen and the lower screen, in which a number of suspended packing blocks are distributed, an aerator connected to an air source and located below the lower screen in the cylinder, a sludge discharge port and a drain outlet on the cylinder, with the sludge discharge port located below the lower screen and the drain outlet located between the lower screen and the upper screen, and a grate installed in the drain outlet.

[0006] The top of the cylinder is provided with an overflow port, which is located above the water inlet.

[0007] The top surface of the cylinder is provided with an inspection port, which is sealed by a cover.

[0008] A level gauge is installed on the cylinder, located above the upper barrier net.

[0009] The suspended filler block is made of HDPE material, with a size of ∅25x10mm and a filling rate of 20%.

[0010] The upper and lower barrier nets have a mesh diameter of ∅15mm and are made of SUS304 stainless steel.

[0011] The above technical solution has the following beneficial effects:

[0012] 1. A small-scale sewage treatment device includes a closed cylindrical body. An inlet is located at the top of the cylindrical body, through which domestic sewage enters the cylindrical body. An upper and lower baffle are located in the middle of the cylindrical body, forming a filling space between them. Several suspended packing blocks are distributed within this filling space and confined to the middle of the cylindrical body by the upper and lower baffles. Aerobic activated sludge is generated and enriched on the surface of the suspended packing blocks, while anaerobic activated sludge is generated and enriched inside the suspended packing blocks. An aerator connected to an air source is installed inside the cylinder and located below the lower screen. After wastewater enters the cylinder, oxygen is supplied to the aerobic sludge through the aerator, and an aerobic treatment process takes place between the upper and lower screens. Microorganisms remove some pollutants from the wastewater. Simultaneously, aeration also stirs the suspended packing blocks, causing aged, poorly adhered activated sludge to detach from the blocks and pass through the lower screen, accumulating at the bottom of the cylinder. After the aerobic process is complete, air supply is stopped, creating an anoxic environment for the anaerobic treatment process, where microorganisms remove nitrogen and phosphorus from the wastewater. The cylinder is equipped with a sludge discharge port and a drain outlet. The sludge discharge port is located below the lower screen, and the drain outlet is located between the lower and upper screens. After the anaerobic treatment process is completed, the treated clear liquid can be discharged by opening the drain outlet. When the liquid level drops to a low level, water can be added again for the next batch of operation, ensuring stable influent and clear effluent. The aged sludge accumulated at the bottom of the cylinder can be discharged through the sludge discharge port. A grate is installed in the drain outlet to prevent suspended packing blocks from being discharged with the clear liquid and to prevent the loss of activated sludge. The entire wastewater treatment process is integrated into the cylinder, which also has the advantages of compact structure and convenient maintenance.

[0013] 2. An overflow port is provided at the top of the cylinder, and the overflow port is located above the water inlet. When excessive sewage enters the cylinder, the excess sewage can be discharged through the overflow port, ensuring that the sewage treatment equipment can treat sewage efficiently and stably.

[0014] 3. An inspection port is provided on the top surface of the cylinder, which is sealed by a cover, for inspection and maintenance of the small sewage treatment equipment.

[0015] 4. A level gauge is installed on the cylinder, located above the upper screen. The level gauge monitors the liquid level of the sewage inside the cylinder and can be linked to the sewage source to replenish or stop the water intake.

[0016] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a cross-sectional view of the present invention.

[0019] In the attached diagram, 1 is the cylinder, 2 is the inlet, 3 is the upper screen, 4 is the lower screen, 5 is the filling space, 6 is the suspended packing block, 7 is the aerator, 8 is the sludge discharge port, 9 is the drain outlet, 10 is the grate, 11 is the overflow port, 12 is the inspection port, 13 is the cover, and 14 is the level gauge. Detailed Implementation

[0020] See Figure 1 and Figure 2 This is a specific embodiment of a small-scale sewage treatment device. The small-scale sewage treatment device includes a closed cylindrical body 1. An inlet 2 is provided at the top of the cylindrical body 1. Specifically, the inlet is located at the top of the side wall of the cylindrical body. An overflow outlet 11 is also provided at the top of the side wall of the cylindrical body, located above the inlet 2. The inlet and overflow outlet are located on opposite sides of the cylindrical body. To meet maintenance needs, an inspection port 12 is provided on the top surface of the cylindrical body 1, sealed by a cover 13. Typically, the cover is fixed to the cylindrical body by a threaded connection, sealing the inspection port. An upper baffle 3 and a lower baffle 4 are provided in the middle of the cylindrical body 1, forming a filling space 5 between them. Specifically, the mesh diameter of the upper baffle 3 and the lower baffle 4 is ∅15mm, and the material is SUS304. The filling space 5 contains several suspended packing blocks 6. These blocks are conventional packing structures, specifically made of HDPE material, with dimensions of ∅25x10mm and a filling rate of 20%. The distribution density of the packing blocks can be flexibly determined according to actual conditions. An aerator 7 is installed in the cylinder 1, connected to an air source and located below the lower screen 4. Specifically, the air inlet pipe connected to the aerator extends upwards through the top of the cylinder and is connected to the air source. The cylinder 1 is equipped with a sludge discharge port 8 and a drain outlet 9. The sludge discharge port 8 is located below the lower screen 4, and the drain outlet 9 is located between the lower screen 4 and the upper screen 3. A grate 10 is installed in the drain outlet 9.

[0021] Furthermore, in order to monitor the liquid level of the sewage in the tank, a liquid level gauge 14 is installed on the tank body 1, located above the upper net 3.

[0022] The working principle of this invention is as follows: It adopts an intermittent operation mode. Wastewater enters the cylinder through the inlet, and the inflow rate is controlled by a level gauge. After the water intake is complete, the equipment starts operating. The aerator provides oxygen to the cylinder and simultaneously stirs the suspended packing blocks. The wastewater undergoes aerobic microbial action to remove some pollutants. After a period of operation, aeration stops, and the aged, detached activated sludge passes through the lower screen and settles at the bottom of the cylinder, entering an anoxic and anaerobic stage to remove nitrogen and phosphorus. After the anaerobic stage, the drain outlet is opened, and the clear liquid is discharged through a grate. When the liquid level in the cylinder drops to a low level, the system can be re-injected for the next batch of operation, ensuring stable inflow and clear effluent. The aged sludge deposited at the bottom of the cylinder is discharged through the sludge discharge outlet.

Claims

1. A compact sewage treatment plant characterised in that: The device includes a closed cylinder (1), with an inlet (2) at the top and an upper baffle (3) and a lower baffle (4) in the middle. A filling space (5) is formed between the upper baffle (3) and the lower baffle (4), and several suspended packing blocks (6) are distributed in the filling space (5). An aerator (7) is installed in the cylinder (1), which is connected to an air source and located below the lower screen (4). The cylinder (1) is provided with a mud discharge port (8) and a drain port (9), with the mud discharge port (8) located below the lower screen (4) and the drain port (9) located between the lower screen (4) and the upper screen (3). A grate (10) is provided in the drain port (9).

2. The small-scale sewage treatment equipment according to claim 1, characterized in that: The top of the cylinder (1) is provided with an overflow port (11), and the overflow port (11) is located above the water inlet (2).

3. The small-scale sewage treatment equipment according to claim 1, characterized in that: The top surface of the cylinder (1) is provided with an inspection port (12), which is sealed by a cover (13).

4. The small-scale sewage treatment equipment according to claim 1, characterized in that: A level gauge (14) is installed on the cylinder (1), located above the upper net (3).

5. The small-scale sewage treatment equipment according to claim 1, characterized in that: The suspended filler block (6) is made of HDPE material, with a size of ∅25x10mm and a filling rate of 20%.

6. The small-scale sewage treatment equipment according to claim 1 or 5, characterized in that: The mesh diameter of the upper barrier (3) and the lower barrier (4) is ∅15mm, and the material is SUS304.

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