Wastewater treatment device combining double filters and biochemical cylinder

Abstract

The utility model discloses a wastewater treatment device combining double filters and biochemical cylinders. The wastewater treatment device comprises a preposed centrifugal filter, one or more vertical biochemical cylinders and a postposed centrifugal filter, the horizontal position of the preposed centrifugal filter is higher than the water inlet, the bottom of the preposed centrifugal filter is provided with a first water outlet pipe, and the first water outlet pipe is connected with the water inlet of the vertical biochemical cylinder; the rear centrifugal filter is connected with a water inlet pipe, the bottom is provided with a second water outlet pipe, and the water inlet pipe is connected with the overflow port of the vertical biochemical cylinder. According to the utility model, pathogens such as bacteria, viruses and parasites in water can be effectively intercepted, and the risk that cultured organisms are infected with diseases is reduced. Water body pollution is reduced, water quality is kept clean, various diseases caused by water quality deterioration are reduced, and the survival rate of cultured organisms is increased.

Description

Technical Field

[0001] This utility model pertains to fish farming equipment, specifically relating to a wastewater treatment device consisting of a composite dual filter and a biochemical cartridge. Background Technology

[0002] With the rapid development of aquaculture, increasing stocking densities and feed inputs have led to the accumulation of large amounts of harmful substances such as organic matter, ammonia nitrogen, and nitrite in the water. If these pollutants are not effectively treated, they can severely impact the growth and health of aquatic organisms, even causing diseases and reducing aquaculture efficiency. Aquaculture wastewater treatment is a crucial component of the aquaculture industry, primarily used to treat organic waste, ammonia nitrogen, nitrite, and other harmful substances in the aquaculture water. Through biodegradation, these substances are transformed into harmless or beneficial substances for aquatic organisms, thereby maintaining the ecological balance and water quality safety of the aquaculture water. With the continuous development of biotechnology and environmental science, the design, construction, and operation management technologies of aquaculture biological treatment ponds have become increasingly mature. A reasonable structure and layout of the biological treatment pond is designed based on factors such as the scale of aquaculture and water quality characteristics. A biological treatment pond generally includes a pretreatment zone, an aerobic zone, an anaerobic zone, and a sedimentation zone. Through reasonable layout and water flow control, each zone achieves the step-by-step degradation and purification of pollutants.

[0003] Currently, the efficiency of wastewater treatment in biological treatment ponds in aquaculture is difficult to improve. Aquaculture wastewater has a complex and highly variable composition, containing high concentrations of organic matter, ammonia nitrogen, phosphorus, and other pollutants. Existing biological treatment technologies struggle to guarantee stable treatment results when faced with complex water qualities. For example, after a period of operation, biofilm processes may experience aging and shedding of the biofilm, affecting treatment efficiency; activated sludge processes are sensitive to changes in water quality and quantity, and are prone to sludge bulking. With the continuous expansion of aquaculture scale and increasing stocking density, wastewater generation is also constantly increasing, placing higher demands on the treatment capacity of biological treatment ponds. Furthermore, modern aquaculture often uses various antibiotics and hormones to prevent disease and promote growth. The residues of these drugs in aquaculture wastewater present new challenges to the treatment of biological treatment ponds. Utility Model Content

[0004] To address the aforementioned technical problems, this invention combines a dual-stage centrifugal filter and a simple biological treatment tank. The pre-centrifugal filter removes most suspended solids and waste produced by the cultured organisms. The culture water is then piped into the biological treatment tank, where anaerobic facultative bacteria purify the wastewater and pollutants such as ammonia nitrogen, nitrite, and total phosphorus produced by the cultured organisms. The purified water is then piped to a post-centrifugal filter for a second filtration, removing the bacterial film and suspended solids produced by the vertical biological treatment tank. The water treated by the centrifugal filter is then piped back to the culture pond area for continued use. This invention effectively intercepts pathogens such as bacteria, viruses, and parasites in the water, reducing the risk of disease infection in cultured organisms. It reduces water pollution, maintains water quality, reduces diseases caused by water quality deterioration, and improves the survival rate of cultured organisms.

[0005] The technical solution provided by this utility model is as follows:

[0006] A wastewater treatment device with a composite dual filter and a biological cartridge includes a pre-centrifugal filter, one or more vertical biological cartridges, and a post-centrifugal filter. The vertical biological cartridges have an inlet at the bottom and an overflow at the top. The pre-centrifugal filter is positioned horizontally above the inlet and has a first outlet pipe at its bottom, which is connected to the inlet of the vertical biological cartridge. The post-centrifugal filter has an inlet pipe connected to it and a second outlet pipe at its bottom, which is connected to the overflow of the vertical biological cartridge.

[0007] Preferably, the pre-centrifugal filter and the post-centrifugal filter are provided with a filter screen or filter membrane of 200-400 mesh.

[0008] Preferably, the main body of the upright biochemical cylinder is made of PVC pipe.

[0009] Preferably, the diameter of the PVC pipe is 110 mm.

[0010] Preferably, the end of the first water outlet pipe is a sewage outlet for discharging solid waste generated inside the biochemical cylinder. A controllable switch is provided at the sewage outlet to control whether solid waste is discharged.

[0011] Preferably, the biochemical cylinder is filled with a strip packing material, on which facultative anaerobic composite microorganisms are fixed.

[0012] Preferably, the height of the pre-centrifugal filter is adjustable.

[0013] Compared with the prior art, the present invention has the following technical advantages:

[0014] Unlike traditional biological treatment tanks, this invention uses pre- and post-filters to separate and remove most impurities from the excrement of farmed organisms, significantly reducing fish waste, carcasses, and other solid waste. This greatly reduces ammonia nitrogen and nitrite levels, thereby reducing the toxicity pressure on the vertical biological treatment tank and preventing biobulking. Even in the event of biobulking and a large biofilm buildup, simply opening the valve at the end of the first inlet pipe allows the large amount of biofilm produced inside the tank to be directly discharged. The operation is simple, convenient, and does not affect the normal use of the equipment.

[0015] (2) In this utility model, a belt-type packing material is installed inside the biochemical cylinder, and facultative anaerobic composite microorganisms are fixed on the belt-type packing material. The microorganisms, microbial secretions, and suspended solids remaining in the wastewater form a porous biofilm, which increases the contact area between the microorganisms and the wastewater and improves the treatment efficiency. Simultaneously, this utility model can adjust the flow rate of the filtered wastewater entering the vertical biochemical cylinder and its residence time in the cylinder by adjusting the height of the pre-filter, ensuring that the wastewater stays in the vertical biochemical cylinder for 4-6 hours. This allows the microorganisms to effectively and fully adsorb and degrade pollutants such as organic matter, ammonia nitrogen, and total phosphorus in the wastewater, converting complex organic matter into simple inorganic matter through metabolism, thus achieving water purification. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the internal structure of the biochemical cylinder in this utility model.

[0018] The components include: 1. Pre-centrifugal filter; 2. Vertical biochemical cylinder; 3. Post-centrifugal filter; 4. Inlet; 5. Overflow outlet; 6. First outlet pipe; 7. Second outlet pipe; 8. Inlet pipe; 9. Belt packing; 10. Packing fixing component; 11. Controllable switch; 12. Sewage outlet; 13. Vertical biochemical cylinder fixing frame. Detailed Implementation

[0019] The accompanying drawings will now be further described in conjunction with specific embodiments and the accompanying figures.

[0020] like Figure 1 and Figure 2As shown, this utility model discloses a wastewater treatment device with a composite dual filter and a biological cylinder, including a pre-centrifugal filter 1, ten vertical biological cylinders 2, and a post-centrifugal filter 3. The pre-centrifugal filter 1 and the post-centrifugal filter 2 are equipped with filter screens or filter membranes of 200-400 mesh. The ten vertical biological cylinders 2 are placed in parallel, and each has an inlet 4 at its bottom and an overflow 5 at its top. The pre-centrifugal filter 1 is placed horizontally above the inlet 4 at the bottom of the vertical biological cylinders 2. The pre-centrifugal filter 1 has a first outlet pipe 6 at its bottom, which is connected to the inlet 4 of the ten vertical biological cylinders 2. Its end is a sewage outlet 12, which is used to discharge solid waste such as bacterial film and suspended solids generated in the vertical biological cylinders 2. A controllable switch 11 is provided at the sewage outlet 12 to control whether solid waste is discharged. The post-centrifugal filter 3 is connected to an inlet pipe 8 and has a second outlet pipe 7 at the bottom. The inlet pipe 8 is connected to the overflow outlets 5 of ten upright biochemical cylinders 2.

[0021] In this utility model, the main body of the upright biochemical cylinder 2 is made of PVC pipe; the diameter of the PVC pipe is preferably 110mm; a strip packing 9 is fixed inside the upright biochemical cylinder 2, and the strip packing 9 is fixed inside the upright biochemical cylinder 2 by a packing fixing member 10. The commonly used specification is 300D polyester yarn, and microorganisms are fixed on the polyester yarn.

[0022] In practical applications, the flow rate of wastewater within the vertical biological treatment tank 2 is first calculated based on its volume (ensuring a residence time of 4-6 hours). The placement height of the pre-centrifugal filter 1 is then adjusted accordingly. The aquaculture wastewater enters the pre-centrifugal filter 1, where most solid waste (such as suspended solids and excrement from aquaculture organisms) is retained by the filter membrane or screen. The liquid flows into the first outlet pipe 6. Because the pre-centrifugal filter 1 is positioned higher than the inlet 4 of the vertical biological treatment tank 2, the liquid from the first outlet pipe 6 continuously flows from the inlet 4 into the vertical biological treatment tank 2 for purification. After purification, the liquid flows out from the overflow port 5 into the inlet pipe 8, and then into the post-centrifugal filter 3 to remove some of the bacterial film and suspended solids produced by the vertical biological treatment tank 2. When there is too much accumulated bacterial film and suspended matter in the vertical biochemical cylinder 2, the controllable switch 11 at the sewage outlet 12 is opened, and the bacterial film and suspended matter are directly flushed out of the sewage outlet 12 by the liquid from the first water outlet pipe 6.

Claims

1. A wastewater treatment device comprising a composite dual filter and a biological treatment cartridge, characterized in that: Includes a pre-centrifugal filter, one or more upright biochemical cartridges, and a post-centrifugal filter; The upright biochemical cylinder has an inlet at the bottom and an overflow at the top. The pre-centrifugal filter is positioned horizontally above the inlet and has a first outlet pipe at its bottom, which is connected to the inlet of the upright biochemical cylinder. The post-centrifugal filter has an inlet pipe connected to it and a second outlet pipe at its bottom, which is connected to the overflow of the upright biochemical cylinder.

2. The wastewater treatment device with a composite dual filter and a biological treatment cartridge according to claim 1, characterized in that: The pre-centrifugal filter and the post-centrifugal filter are equipped with a 200-400 mesh filter screen or filter membrane.

3. The wastewater treatment device with a composite dual filter and a biological treatment cartridge according to claim 1, characterized in that: The main body of the upright biochemical cylinder is made of PVC pipe.

4. The wastewater treatment device with a composite dual filter and a biological treatment cartridge according to claim 3, characterized in that: The preferred diameter for PVC pipes is 110mm.

5. The wastewater treatment device with a composite dual filter and a biological treatment cartridge according to claim 1, characterized in that: The end of the first water outlet is the sewage outlet, which is used to discharge solid waste generated inside the biochemical cylinder. A controllable switch is installed at the sewage outlet to control whether solid waste is discharged.

6. The wastewater treatment device with a composite dual filter and a biological treatment cartridge according to claim 1, characterized in that: The biochemical cylinder contains a fixed strip of packing material, on which facultative anaerobic microorganisms are fixed.

7. The wastewater treatment device with a composite dual filter and a biological treatment cartridge according to claim 1, characterized in that: The height of the pre-centrifugal filter is adjustable.

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