Domestic sewage treatment device based on automatic oxygenation

Abstract

The utility model discloses a domestic sewage treatment device based on automatic oxygenation, which comprises a first treatment tank and a second treatment tank, an anaerobic reaction tank and an aerobic reaction tank are arranged in the first treatment tank, the upper ends of the anaerobic reaction tank and the aerobic reaction tank are open, and the anaerobic reaction tank is filled with spherical anaerobic materials and is used for performing anaerobic digestion treatment on organic matters in sewage; the aerobic reaction tank is arranged at the periphery of the anaerobic reaction tank, and the aerobic reaction tank is filled with aerobic combined filler and is used for carrying out oxygenolysis treatment on sewage subjected to anaerobic digestion treatment by the anaerobic reaction tank; a water distribution oxygenation plate is arranged at the top end of the aerobic reaction tank; the second treatment tank is communicated with the aerobic reaction tank through a pipeline, and a dephosphorization composite filler is arranged in the middle of the second treatment tank and is used for dephosphorizing and precipitating the sewage subjected to oxygenolysis treatment. According to the domestic sewage treatment device disclosed by the utility model, automatic oxygenation is realized by adopting an unpowered high-efficiency oxygenation technology, and meanwhile, the oxygenation efficiency is improved by utilizing a hedging mode that airflow and sewage flow directions are opposite.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, and in particular relates to a domestic sewage treatment device based on automatic oxygenation. Background Art

[0002] Based on the current drainage situation in rural areas, biological treatment is the primary method for rural domestic sewage treatment, primarily utilizing small, highly integrated equipment and facilities. Rural domestic sewage has distinct characteristics from urban sewage. Rural domestic sewage primarily comes from washing, bathing, and some sanitary ware, and the volume of water varies depending on regional economic development. Rural domestic sewage generally has low discharge volumes, relatively high organic matter concentrations, with COD peaks reaching 400-500 mg / L, a large diurnal coefficient of variation, typically between 3 and 6, and intermittent discharge.

[0003] There are various decentralized treatment technologies for rural domestic sewage. Existing technologies primarily include biological treatment based on the activated sludge process (anaerobic (anoxic)-aerobic process, multi-stage A / O process, SBR and its improved CASS process, oxidation ditch process, membrane bioreactor (MBR) process, etc.); biofilm process (biological contact oxidation process, bio-rotating disc process, biofilter, etc.); anaerobic biological treatment (septic tank, anaerobic biofilter); ecological treatment (constructed wetlands, stabilization ponds, underground soil infiltration, artificial rapid infiltration treatment technology); and septic tank treatment. Each technology has its own advantages and characteristics. Biological treatment can reduce pollutant concentrations in sewage; ecological treatment can reduce management complexity and control operating costs. Combined treatment technologies can further improve system treatment efficiency and explore improvement methods. Decentralized treatment technologies in rural my country frequently utilize combined treatment technologies. The increasing trend in rural domestic sewage treatment is to integrate decentralized household-based treatment processes with integrated sewage treatment plants.

[0004] A septic tank is an integrated sewage treatment system primarily used for the treatment of decentralized domestic sewage. Multiple process steps are centralized within the tank, and its technical principle is a combination of biochemical and physical treatment, reducing pollutant concentrations in the sewage through microbial decomposition and physical precipitation. Using buried biological septic tanks to treat rural domestic sewage has demonstrated excellent removal rates for ammonia nitrogen, biochemical oxygen demand (BOD5), turbidity, total nitrogen, chemical oxygen demand, and total phosphorus. This makes them well-suited to the decentralized nature of rural domestic sewage and offers practical benefits for rural application. However, these systems still have some drawbacks: 1. The anaerobic capacity of the system is limited, limiting its efficiency at high solid particle concentrations in sewage; 2. An aeration system is required, requiring an external power supply that consumes significant energy, is expensive, and is difficult to maintain; 3. Long-term use can result in a high concentration of scum and sludge, necessitating periodic manual cleaning, increasing labor and material costs. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model discloses a kind of life sewage treatment devices based on automatic oxygen assignment, to solve the problem of the prior art in the process of utilizing photovoltaic power generation, then in direct current conversion to alternating current can cause a lot of loss, simultaneously in order to meet the power demand of high power, the number of photovoltaic used is more, investment is big, far more than the power demand of small sewage treatment equipment.

[0006] The utility model takes the following technical scheme to realize:

[0007] A kind of life sewage treatment devices based on automatic oxygen assignment, including first treatment pool and second treatment pool, the first treatment pool is provided with the anaerobic reaction tank and aerobic reaction tank of upper end open, the anaerobic reaction tank is filled with spherical anaerobic material, for the anaerobic digestion treatment of organic matter in sewage;The aerobic reaction tank is arranged around anaerobic reaction tank, and the aerobic reaction tank is filled with aerobic combined filler, for the oxidation decomposition treatment of sewage after anaerobic digestion treatment of anaerobic reaction tank;Water distribution oxygenation plate is arranged at the top of aerobic reaction tank;

[0008] The second treatment pool is communicated with aerobic reaction tank pipeline, and the second treatment pool is provided with phosphorus removal composite filler in middle part, for the phosphorus removal precipitation of sewage after oxidation decomposition treatment.

[0009] To optimize the above technical scheme, the specific measures also include:

[0010] Further, the height of the anaerobic reaction tank and the aerobic reaction tank is lower than the height of the first treatment pool.

[0011] Further, the height of the aerobic reaction tank after setting water distribution oxygenation plate is not higher than the anaerobic reaction tank.

[0012] Further, the bottom end of the anaerobic reaction tank and the bottom end of the second treatment pool are provided with sludge discharge funnel, and the bottom of the sludge discharge funnel is provided with sludge discharge pipeline.

[0013] Further, water distribution pipeline is arranged at the lower end of the anaerobic reaction tank, and the water distribution pipeline is arranged in grid shape.

[0014] Further, two filter screens are arranged in the anaerobic reaction tank, and the two filter screens are horizontally arranged in the upper part and the lower part of the anaerobic reaction tank respectively, the spherical anaerobic material is arranged in the two filter screens, and the mesh of the filter screen is smaller than the mesh of the spherical anaerobic material.

[0015] Further, isolation plate is arranged at the lower part of the aerobic reaction tank, and isolation hole is formed in the isolation plate, the diameter of the isolation hole is smaller than the diameter of the aerobic combined filler, and the aerobic combined filler is arranged above the isolation plate.

[0016] Further, the water distribution and oxygen supply plate comprises upper and lower oxygen supply plates arranged horizontally and spaced apart, and a plurality of water distribution holes are arranged on the upper and lower oxygen supply plates alternately.

[0017] Further, the first treatment tank is provided with a heat collecting cover made of transparent material at the top, and an air exhaust pipe is arranged on the heat collecting cover, and a non-powered rotating shaft fan is arranged at the top end of the air exhaust pipe, and an air inlet pipe is arranged at the upper end of the aerobic reaction tank, and the lower end of the air inlet pipe is arranged at the lower end of the water distribution and oxygen supply plate, and the upper end of the air inlet pipe penetrates out of the heat collecting cover, and a rainproof cap is arranged at the top end of the air inlet pipe.

[0018] Further, two baffles are arranged horizontally and spaced apart inside the second treatment tank, and through holes are arranged on the two baffles, and the phosphorus removal composite filler is arranged between the two baffles, and the diameter of the through holes is smaller than the phosphorus removal composite filler.

[0019] The beneficial effects of the utility model are as follows:

[0020] Compared with the prior art, the domestic sewage treatment device based on automatic oxygen supply of the utility model adopts non-powered efficient oxygen supply technology, can realize automatic circulation of oxygen supply for sewage, utilizes the opposite flow direction of airflow and sewage to greatly improve the oxygen supply efficiency, and does not need additional energy to provide power, and is energy-saving and environment-friendly.

[0021] When the device is used for sewage treatment, the overflow and gravity of the sewage can realize the flow degradation treatment of the sewage, and the device does not need additional mechanical equipment and electrical equipment to drive the sewage to flow, has good running stability, low failure rate, and does not need special management.

[0022] The device has the functions of simultaneous nitrification and denitrification, filtration, phosphorus removal, sedimentation and ecological purification through the layout structure of multiple tanks, and the multiple functions are integrated to realize the purpose of one tank with multiple functions and saving of land area. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a flow chart of the domestic sewage treatment device based on automatic oxygen supply of the utility model.

[0024] Figure 2 is Figure 1 another perspective structural schematic view in the utility model.

[0025] The accompanying drawings are marked as follows: anaerobic reaction tank 10, filter screen 11, spherical anaerobic material 12, aerobic reaction tank 20, aerobic composite filler 21, isolation plate 22, water distribution and oxygenation plate 23, upper oxygenation plate 231, lower oxygenation plate 232, water distribution hole 24, heat collecting cover 30, exhaust pipe 31, unpowered rotary fan 32, air inlet pipe 33, rain cap 34, second treatment tank 40, L-shaped connecting pipe 41, partition 42, phosphorus removal composite filler 43, sludge discharge funnel 50, guide plate 60, water inlet pipe 70, hydroponic plants 80. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Reference Figure 1-Figure 2 This embodiment provides a domestic sewage treatment device based on automatic oxygenation, including a first treatment tank and a second treatment tank 40. An anaerobic reaction tank 10 and an aerobic reaction tank 20 are arranged inside the first treatment tank. The sewage first passes through the anaerobic reaction tank 10 for anaerobic digestion treatment, then enters the aerobic reaction tank 20 for oxidative decomposition treatment, and finally enters the second treatment tank 40 for phosphorus removal and precipitation treatment. The treated sewage is discharged through a pipeline.

[0029] like Figure 1 As shown, the first treatment tank is provided with an anaerobic reaction tank 10 with an open top and an aerobic reaction tank 20. Two filter screens 11 are provided inside the anaerobic reaction tank 10. The two filter screens 11 are horizontally arranged at the upper and lower parts of the anaerobic reaction tank 10, respectively. Spherical anaerobic materials 12 composed of polypropylene and polyurethane are arranged inside the two filter screens 11. The mesh of the filter screen 11 is smaller than the mesh of the spherical anaerobic materials 12. This ensures that the spherical anaerobic materials 12 are always maintained at a certain height position inside the anaerobic reaction tank 10, keeping the anaerobic treatment effect in a high-efficiency anaerobic digestion treatment state.

[0030] The aerobic reaction tank 20 is arranged around the anaerobic reaction tank 10, and the aerobic reaction tank 20 is internally filled with aerobic combined fillers 21 composed of polypropylene, ammoniated fiber, polyester silk and the like, which are used for oxidizing and decomposing the sewage treated by the anaerobic reaction tank 10; in order to keep the aerobic combined fillers 21 always distributed at a certain height position inside the aerobic reaction tank 20, a partition plate 22 is arranged at the lower part of the aerobic reaction tank 20, and the partition plate 22 is provided with partition holes, the diameters of the partition holes are smaller than the diameters of the aerobic combined fillers 21, and the aerobic combined fillers 21 are arranged above the partition plate 22.

[0031] In order to improve the oxygenation in the aerobic reaction tank 20, a water distribution and oxygenation plate 23 is arranged at the top end of the aerobic reaction tank 20, and the height of the aerobic reaction tank 20 after arranging the water distribution and oxygenation plate 23 is not higher than the height of the anaerobic reaction tank 10, so as to ensure that the water flow flows smoothly from the anaerobic reaction tank 10 into the aerobic reaction tank 20. The water distribution and oxygenation plate 23 comprises an upper oxygenation plate 231 and a lower oxygenation plate 232 arranged horizontally and spaced apart, and a plurality of water distribution holes 24 are arranged staggeredly on the upper oxygenation plate 231 and the lower oxygenation plate 232, that is, the water distribution holes 24 on the upper oxygenation plate 231 and the lower oxygenation plate 232 are not located at the same position in the numerical direction. The water flow flows through the upper oxygenation plate 231 and the lower oxygenation plate 232 and then flows into the aerobic reaction tank 20.

[0032] The aerobic reaction tank 20 adopts natural oxygenation, and the oxygen content of the upper part of the aerobic reaction tank 20 is higher than that of the bottom part, and when the water flow passes through the filler layer, the oxygen content forms a concentration gradient decreasing from top to bottom in the vertical direction. At the same time, since the contact oxidation method is adopted in the aerobic reaction tank 20, the oxygen supply outside the biofilm composed of the aerobic combined fillers is sufficient, and the oxygen supply inside the biofilm is less, so that the concentration gradient of the oxygen content is formed from outside to inside of the biofilm. The above arrangement facilitates the formation of simultaneous nitrification and denitrification in the aerobic reaction tank 20, and achieves the effect of denitrification.

[0033] The heights of the anaerobic reaction tank 10 and the aerobic reaction tank 20 are lower than the height of the first treatment tank, a heat collecting cover 30 made of transparent material is arranged at the top of the first treatment tank, a circulating space is formed below the heat collecting cover 30 and above the first treatment tank, an air exhaust pipe 31 is arranged on the heat collecting cover 30, a non-powered rotating shaft fan 32 is arranged at the top end of the air exhaust pipe 31, and the rotating shaft fan 32 can be driven to rotate by the natural wind in nature or the convection between the inside and outside of the device, so as to improve the ventilation effect; an air inlet pipe 33 is arranged at the upper end of the aerobic reaction tank 20, the lower end of the air inlet pipe 33 is arranged at the lower end of the water distribution and oxygenation plate 23, the upper end of the air inlet pipe 33 penetrates out of the heat collecting cover 30, and a rainproof cap 34 is arranged at the top end of the air inlet pipe 33.

[0034] As shown in Figure 2 The air exhaust pipe 31, the air inlet pipe 33, the water distribution and oxygenation plate 23 and the circulating space constitute an oxygenation circulation loop, and the specific principle is as follows:

[0035] The heat collecting cover 30 will gather heat, causing the space in the circulation space to expand due to the heat, and then the hot air in the circulation space will be discharged from the exhaust pipe 31. After the hot air is discharged, the pressure in the circulation space will become lower, thus forming a negative pressure. The outside air will then be sucked into the bottom of the water distribution and oxygenation plate 23 from the air inlet pipe 33. The air will then pass upward through the lower oxygenation plate 232 and the upper oxygenation plate 231 in turn and enter the circulation space, thus completing a cycle. The air in the circulation space will then expand again due to the heat and automatically enter the next cycle. At the same time, the sewage continues to flow from top to bottom through the upper oxygenation plate 231 and the lower oxygenation plate 232. When the wastewater enters and flows through the two oxygenation plates, a water film will form on the plate, and then it will be evenly divided into small water columns through the water distribution holes 24, and finally enter the aerobic reaction tank 20.

[0036] The flow direction of sewage through the water distribution and oxygenation plate 23 is opposite to the flow direction of air through the water distribution and oxygenation plate 23. The strong water-gas convection improves the oxygenation efficiency. Then the air is deflected and passes through the middle of the two layers of oxygenation plates. Since the water flow on the water distribution plate forms a water film, the contact area between air and water is increased, thereby improving the oxygenation efficiency.

[0037] The sewage after aerobic treatment is gathered at the bottom of the aerobic reaction tank 20. An inverted L-shaped connecting pipe 41 is provided between the aerobic reaction tank 20 and the second treatment tank 40. The vertical end of the L-shaped connecting pipe 41 is provided in the aerobic reaction tank 20, and the horizontal end of the L-shaped connecting pipe 41 connects the aerobic reaction tank 20 and the second treatment tank 40. Under the action of gravity, the sewage enters the L-shaped connecting pipe 41 from the lower end of the L-shaped connecting pipe 41, and then flows into the second treatment tank 40 from the horizontal end of the L-shaped connecting pipe 41. In order to ensure uniform water distribution, a guide plate is provided at the water outlet of the L-shaped connecting pipe 41.

[0038] Two partitions 42 are horizontally spaced apart within the second treatment tank 40. Each partition 42 is provided with a through-hole. A phosphorus-removing composite filler is placed between the two partitions 42. The through-holes have a smaller diameter than those used for other phosphorus-removing composite fillers such as zeolite and ceramsite. Hydroponic plants are planted above the second treatment tank 40. These plants absorb pollutants such as COD, TN, and TP. Their well-developed root systems at the bottom act as a contact oxidation agent. The entire system provides biological purification while also offering significant economic benefits and ornamental value.

[0039] A sludge discharge funnel is provided at the bottom of the anaerobic reaction tank 10 and the bottom of the second treatment tank 40. A sludge discharge pipe is provided at the bottom of the sludge discharge funnel. During the sludge discharge process, the sludge at the bottom is regularly sucked out for treatment using a sewage suction device.

[0040] The above are only preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be pointed out that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A domestic sewage treatment device based on automatic oxygenation, characterized by: The invention comprises a first treatment tank and a second treatment tank. The first treatment tank is provided with an anaerobic reaction tank and an aerobic reaction tank with an open top. The anaerobic reaction tank is filled with spherical anaerobic materials for anaerobic digestion of organic matter in the sewage. The aerobic reaction tank is arranged around the anaerobic reaction tank. The aerobic reaction tank is filled with aerobic composite fillers for oxidative decomposition of the sewage after anaerobic digestion in the anaerobic reaction tank. The top of the aerobic reaction tank is provided with a water distribution and oxygenation plate. The second treatment tank is connected to the aerobic reaction tank pipeline. A phosphorus removal composite filler is provided in the middle of the second treatment tank for performing phosphorus removal and precipitation on the sewage after the oxidation and decomposition treatment.

2. The domestic sewage treatment device based on automatic oxygenation according to claim 1 is characterized in that: The heights of the anaerobic reaction tank and the aerobic reaction tank are both lower than that of the first treatment tank.

3. The domestic sewage treatment device based on automatic oxygenation according to claim 2 is characterized in that: The height of the aerobic reaction tank after the water distribution and oxygenation plate is arranged is not higher than that of the anaerobic reaction tank.

4. The domestic sewage treatment device based on automatic oxygenation according to claim 3 is characterized in that: The bottom ends of the anaerobic reaction tank and the second treatment tank are both provided with a mud discharge funnel, and the bottoms of the mud discharge funnels are provided with a mud discharge pipeline.

5. The domestic sewage treatment device based on automatic oxygenation according to claim 4 is characterized in that: A water distribution pipe is provided at the lower end of the anaerobic reaction tank, and the water distribution pipe is arranged in a grid shape.

6. The domestic sewage treatment device based on automatic oxygenation according to claim 5 is characterized in that: Two filter screens are arranged inside the anaerobic reaction tank. The two filter screens are respectively arranged horizontally at the upper and lower parts of the anaerobic reaction tank. The spherical anaerobic material is arranged inside the two filter screens. The mesh of the filter screen is smaller than the mesh of the spherical anaerobic material.

7. The domestic sewage treatment device based on automatic oxygenation according to claim 1, characterized in that: An isolation plate is provided at the lower part of the aerobic reaction tank. An isolation hole is provided on the isolation plate. The diameter of the isolation hole is smaller than the diameter of the aerobic combination filler. The aerobic combination filler is provided above the isolation plate.

8. The domestic sewage treatment device based on automatic oxygenation according to claim 7 is characterized in that: The water distribution and oxygenation plate includes an upper oxygenation plate and a lower oxygenation plate arranged horizontally at intervals. A plurality of water distribution holes are alternately arranged on the upper oxygenation plate and the lower oxygenation plate. The flow direction of sewage through the water distribution and oxygenation plate is opposite to the flow direction of air through the water distribution and oxygenation plate.

9. The domestic sewage treatment device based on automatic oxygenation according to claim 8, characterized in that: A heat collecting cover made of transparent material is provided on the top of the first treatment tank, an exhaust pipe is provided on the heat collecting cover, a non-powered rotary shaft fan is provided on the top of the exhaust pipe, an air inlet pipe is provided at the upper end of the aerobic reaction tank, the lower end of the air inlet pipe is provided at the lower end of the water distribution and oxygenation plate, the upper end of the air inlet pipe passes through the heat collecting cover, and a rainproof cap is provided on the top of the air inlet pipe.

10. The domestic sewage treatment device based on automatic oxygenation according to claim 1, characterized in that: Two partitions are horizontally spaced apart inside the second treatment pool, both of which are provided with through holes. The phosphorus removal composite filler is arranged between the two partitions, and the aperture of the through hole is smaller than that of the phosphorus removal composite filler.

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