Bio-cage suspended filler sewage treatment device

Abstract

The utility model belongs to sewage treatment device technical field especially, it is Bio - Cage suspended filler sewage treatment device. The utility model discloses an oxidation pond, and a plurality of cage type closed structures are detachably installed in the oxidation pond, and a plurality of suspended fillers are filled in each cage type closed structure, and the outer wall of cage type closed structure is provided with a plurality of limit channel steel, and the limit channel steel is connected with the limit rod that stands in the oxidation pond. The bottom of oxidation pond is evenly distributed with a plurality of aeration devices. The utility model adopts suspended filler closed type cage system, and the high load treatment working condition can be reached in the auxiliary conventional hydrolysis acidification pond, biochemical pond.

Description

Technical Field

[0001] This utility model belongs to the technical field of sewage treatment devices, and in particular relates to a Bio-Cage suspended packing sewage treatment device. Background Technology

[0002] In recent years, with increasingly higher requirements for wastewater treatment, the MMBBR (Moving Bed Bio-film Reactor) process, which is characterized by high treatment efficiency, compact layout, and the ability to treat wastewater in a limited space, is now widely adopted. The principle of this process is to directly add suspended packing material with a specific gravity close to that of water into the oxidation tank as an active carrier for microorganisms. Under the action of aeration and water flow, the packing material is in a fluidized state, thereby achieving the purpose of wastewater treatment.

[0003] The suspended packing material is usually directly dispersed in the oxidation tank, which makes it easy to accumulate, clog, or be lost with the water flow, resulting in a decrease in the effective specific surface area (reduced by 30% to 50%). When it is necessary to replace the traditional packing material or repair the entire tank, the entire treatment process needs to be shut down, resulting in significant downtime losses and high maintenance costs. In addition, the fixed packing material system is difficult to adapt to changes in water quality or expansion needs, and the process is not flexible enough. Utility Model Content

[0004] To overcome the shortcomings of the existing technology, this invention provides a Bio-Cage suspended packing wastewater treatment device. This invention employs a closed-loop cage system with suspended packing, which, in conjunction with conventional hydrolysis acidification tanks and biological treatment tanks, can achieve high-load treatment conditions.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A Bio-Cage suspended media wastewater treatment device includes an oxidation tank, in which several cage-type closed structures are detachably installed, each cage-type closed structure is filled with several suspended media, and the outer wall of the cage-type closed structure is provided with several limiting channel steels, which are engaged with limiting rods erected in the oxidation tank; several aeration devices are evenly distributed at the bottom of the oxidation tank.

[0006] Preferably, the cage-type enclosed structure is a square frame structure composed of several stainless steel columns and several stainless steel beams; all six sides of the square frame structure are provided with wire mesh, and the mesh aperture is smaller than the aperture of the suspended packing.

[0007] Preferably, concave limiting channel steels are fixed on both sides of the cage-like closed structure, and the openings of the limiting channel steels are away from the cage-like closed structure.

[0008] Preferably, the bottom of the square frame structure is provided with a support column, and the height of the support column is greater than the height of the aeration device.

[0009] Preferably, the wire mesh has an aperture of ≥1.5cm.

[0010] Preferably, the aeration device is connected to an electrically adjustable butterfly valve; the aeration device is one of a disc aeration device, a tubular aeration device, and a perforated aeration device.

[0011] Preferably, both the inlet and outlet of the aerobic tank are equipped with online dissolved oxygen analyzers, which are connected to electric regulating butterfly valves.

[0012] The advantages of this utility model are: (1) The suspended packing closed cage system of this utility model can assist conventional hydrolysis acidification tanks and biological tanks to achieve high-load treatment conditions without the need for production shutdown. The device is a detachable cage-type suspended packing module, which is convenient for replacement or maintenance; the cage-type suspended packing wastewater treatment device is anti-clogging type, which can solve the clogging problem of traditional packing; it can be matched with a variety of packings, with high biofilm cultivation efficiency and strong impact resistance; it is convenient for inspection and maintenance: the device is an independent unit, which allows for partial inspection without affecting the overall system operation; it can be flexibly adjusted and combined: the number, height and position of the device can be adjusted according to the treatment scale and water quality changes to optimize the treatment effect.

[0013] (2) Each individual Bio-Cage suspended media wastewater treatment unit exhibits a mixed + plug flow state, while the entire large aerobic zone exhibits a plug flow state. Each individual Bio-Cage suspended media wastewater treatment unit has both plug flow and complete mixing states, which can effectively overcome short-circuiting and improve buffering capacity. Attached Figure Description

[0014] Figure 1 This is a top plan view of the present invention.

[0015] Figure 2 This is a bottom plan view of the present invention.

[0016] Figure 3 for Figure 2 A schematic diagram of the AA cross-section.

[0017] Figure 4 for Figure 1 A schematic diagram of the BB structure.

[0018] Figure 5 This is a schematic diagram of the cage-type enclosed structure of this utility model.

[0019] The meanings of the symbols marked in the figure are as follows: 1-Oxidation tank, 2-Cage-type enclosed structure, 3-Online dissolved oxygen analyzer, 4-Aeration device, 5-Support column, 6-Stainless steel column, 7-Limiting channel steel, 8-Wire mesh, 9-Stainless steel beam. Detailed Implementation

[0020] like Figure 1-5 As shown, a Bio-Cage suspended filler wastewater treatment device includes an oxidation tank 1. Several cage-type closed structures 2 are detachably installed inside the oxidation tank 1. Each cage-type closed structure 2 is filled with several suspended fillers. Several limiting channel steels 7 are provided on the outer wall of the cage-type closed structure 2. The limiting channel steels 7 are engaged with limiting rods erected inside the oxidation tank 1. Several aeration devices 4 are evenly distributed at the bottom of the oxidation tank 1.

[0021] The cage-type enclosed structure 2 is a square frame structure composed of several stainless steel columns 6 and several stainless steel beams 9; all six sides of the square frame structure are provided with wire mesh 8, and the aperture of the wire mesh 8 is smaller than the aperture of the suspended packing.

[0022] The cage-type enclosed structure 2 has concave limiting channel steels 7 fixed on both sides, with the openings of the limiting channel steels 7 facing away from the cage-type enclosed structure 2. A support column 5 is provided at the bottom of the square frame structure, and the height of the support column 5 is greater than the height of the aeration device 4. Suspended packing material is sealed in the cage-type enclosed structure 2, and the mesh size of its wire mesh 8 is ≥1.5cm. The mesh size can be adjusted according to the particle size of the suspended packing material, and it can be used in aerobic tanks for wastewater treatment. The number of cage-type devices placed in the aerobic tank of the cage-type enclosed structure 2 can be flexibly adjusted according to the size of the tank.

[0023] Aeration device 4 is connected to an electrically adjustable butterfly valve; aeration device 4 is one of disc aeration device 4, pipe aeration device 4, and perforated aeration device 4. Through aeration device 4, the aerobic tank 1 enables the wastewater to form an internal circulation with the suspended packing material in each cage-type closed structure 2, thereby enhancing the biological treatment effect.

[0024] Both the inlet and outlet of the aerobic tank are equipped with online dissolved oxygen analyzers 3. The online dissolved oxygen analyzers 3 are connected to electric regulating butterfly valves and can provide feedback to the electric regulating butterfly valves based on the dissolved oxygen values ​​entering and exiting, thereby automatically adjusting the valve opening degree.

[0025] The Bio-Cage suspended media wastewater treatment unit has aeration devices evenly distributed at the bottom. The aeration devices can be disc type, pipe type, or perforated type. Each Bio-Cage suspended media wastewater treatment unit is equipped with an aeration main pipe controlled by an individual or shared electric regulating butterfly valve (as shown in the example D01A1~D01A4). By opening, closing, or adjusting the degree of valve opening, a certain dissolved oxygen concentration gradient can be formed in each independent Bio-Cage suspended media wastewater treatment unit, and the operating process conditions can be adjusted according to the water quality.

[0026] The operation of the device will now be described in detail with reference to the accompanying drawings in the embodiments.

[0027] Taking a wastewater treatment plant in Huainan as an example, the designed treatment capacity is Q=6500m³. 3 / d, Phase 1 involves the renovation of an old treatment pond, with a processing capacity of 2000m³. 3 / d, four sets of the Bio-Cage suspended filler wastewater treatment devices of this utility model are installed. The design width L of each cell is 7m, so the length B of each cell is 7m, and the retention time is 9h; the second phase is the construction of new cells with a treatment capacity of 4500m³. 3 A total of 7 sets of Bio-Cage suspended media wastewater treatment devices are installed, with two compartments. One compartment has a width L of 17.4m and a length B of 10.5m, and is equipped with 3 sets of Bio-Cage suspended media wastewater treatment devices. The other compartment has a width L of 16.2m and a length B of 9m, and is equipped with 4 sets of Bio-Cage suspended media wastewater treatment devices. The retention time for both compartments is 9 hours.

[0028] The current water volume is approximately 6000 t / d. The influent COD is about 200~300 mg / L and TN is about 40 mg / L. Using the Bio-Cage suspended media wastewater treatment device, the effluent COD is consistently below 30 mg / L and the effluent TN is consistently below 10 mg / L, which is higher than the wastewater treatment plant's requirements of effluent COD of 50 mg / L and effluent TN of 15 mg / L.

[0029] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A Bio-Cage suspended media wastewater treatment device, characterized in that: The oxidation tank (1) includes several cage-type closed structures (2) which are detachably installed inside the oxidation tank (1). Each cage-type closed structure (2) is filled with several suspended packing materials. Several limiting channel steels (7) are provided on the outer wall of the cage-type closed structure (2). The limiting channel steels (7) are engaged with the limiting rods erected in the oxidation tank (1). Several aeration devices (4) are evenly distributed at the bottom of the oxidation tank (1).

2. The Bio-Cage suspended media wastewater treatment device according to claim 1, characterized in that: The cage-type closed structure (2) is a square frame structure composed of several stainless steel columns (6) and several stainless steel beams (9); all six sides of the square frame structure are provided with wire mesh (8), and the aperture of the wire mesh (8) is smaller than the aperture of the suspended filler.

3. The Bio-Cage suspended media wastewater treatment device according to claim 2, characterized in that: The cage-type closed structure (2) is fixed with concave limiting channel steel (7) on both sides, and the opening of the limiting channel steel (7) is away from the cage-type closed structure (2).

4. A Bio-Cage suspended media wastewater treatment device according to claim 2, characterized in that: The bottom of the square frame structure is provided with a support column (5), and the height of the support column (5) is greater than the height of the aeration device (4).

5. A Bio-Cage suspended media wastewater treatment device according to claim 2, characterized in that: The wire mesh (8) has an aperture of ≥1.5cm.

6. A Bio-Cage suspended media wastewater treatment device according to claim 1, characterized in that: The aeration device (4) is connected to an electric regulating butterfly valve; the aeration device (4) is one of a disc aeration device (4), a tubular aeration device (4) and a perforated aeration device (4).

7. A Bio-Cage suspended media wastewater treatment device according to claim 6, characterized in that: The oxidation tank is equipped with an online dissolved oxygen analyzer (3) at both the inlet and outlet, and the online dissolved oxygen analyzer (3) is connected to an electric regulating butterfly valve.

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