Distributed rural sewage treatment device with unpowered oxygenation function

Abstract

The utility model relates to a decentralized rural sewage treatment device with unpowered oxygenation, which comprises an adjusting tank, an anoxic tank, an aerobic tank and a downstream subsurface flow constructed wetland which are sequentially communicated along the water flow direction in a self-flowing manner, rope-shaped artificial aquatic plants are arranged in the anoxic tank, elastic fillers are arranged in the aerobic tank, the elastic fillers are made of hard polypropylene fibers, and the elastic fillers are filled with water. And chlorella is attached to the elastic filler. The device has the beneficial effects that water flows in a self-flowing manner, basically no operation and maintenance cost can be realized, a biological and ecological treatment combined process is adopted, ammonia nitrogen and phosphorus can be effectively reduced, chlorella attached to the elastic filler can be synthesized into various organic matters through photosynthesis, oxygen can be continuously released, and hard polypropylene fibers are matched for cutting to produce oxygen, so that the water quality is improved. The thalli can decompose organic matters and release CO2 and inorganic ions for the growth of algae, and then the thalli are matched with aerobic bacteria, so that a bacteria-algae symbiont is formed through the mutual promotion of the metabolism of the thalli and the aerobic bacteria, and the whole system tends to be stable.

Description

Technical Field

[0001] The utility model relates to the technical field of rural sewage treatment, in particular to a decentralized rural sewage treatment device with unpowered oxygenation. Background Art

[0002] Rural domestic sewage treatment is not suitable for urban sewage treatment processes due to its scattered, small amount and large fluctuations. It is necessary to formulate sewage treatment plans according to local conditions. At present, rural domestic sewage treatment technologies mainly include biological treatment, ecological treatment and combined treatment processes. Among them, the biological ecological combination technology combines biological treatment and ecological treatment. The pre-biological treatment uses microorganisms to effectively remove organic matter and some nutrients, and the post-ecological treatment is to further remove nitrogen and phosphorus, improve the effluent quality, and ensure stable water quality. Biological treatment is divided into anaerobic treatment and aerobic treatment. Anaerobic treatment can degrade high-concentration organic pollutants into small molecular organic matter and partially degrade pollutants. In the aerobic stage, nitrogen, phosphorus, COD, etc. are further degraded. The aerobic stage generally requires oxygenation and aeration. For long-term operation of rural domestic sewage facilities, it not only involves the purchase cost of the aerator, but also the later electricity bills, maintenance costs, replacement costs, etc. For farmers with low incomes, the pressure is relatively large. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a decentralized rural sewage treatment device with unpowered oxygenation to overcome the deficiencies in the above-mentioned prior art.

[0004] The utility model solves the above-mentioned technical problems with the following technical solutions: a decentralized rural sewage treatment device with unpowered oxygenation, comprising: a regulating tank, an anoxic tank, an aerobic tank and a downward submerged artificial wetland connected in sequence along the water flow direction by gravity, rope-shaped artificial aquatic plants are arranged in the anoxic tank, and elastic fillers are arranged in the aerobic tank, the elastic fillers are made of hard polypropylene, and Chlorella is attached to the elastic fillers.

[0005] The beneficial effects of the utility model are:

[0006] 1) Allow the regulating pond, anoxic pond, aerobic pond and downward subsurface artificial wetland to be connected in sequence along the water flow direction by gravity, that is, let the water flow by gravity, which can achieve basically no operation and maintenance cost;

[0007] 2) Adopt a combination of biological and ecological treatment, let the sewage enter the regulating tank first, adjust the water quantity and quality, and then flow into the anoxic tank by gravity. In the anoxic tank, large molecular organic matter is decomposed into small molecular organic matter that is easily used by microorganisms, and denitrifying bacteria use high concentrations of organic carbon sources to reduce total nitrogen. Polyphosphate bacteria store energy and provide electron donors for the reduction of total phosphorus in the aerobic stage. The rope-shaped artificial water grass in the anoxic tank is conducive to microbial biofilm. Then the water in the anoxic tank flows into the aerobic tank by gravity. Nitrifying bacteria in the aerobic tank can effectively reduce ammonia nitrogen by using a small amount of carbon source, and polyphosphate bacteria reduce total phosphorus. Small molecular organic matter is further decomposed into carbon dioxide and water by aerobic microorganisms. After biological treatment, the sewage enters the downward subsurface flow artificial wetland to further reduce pollutants. The effluent of the downward subsurface flow artificial wetland meets the "Agricultural Irrigation Water Quality Standard" and "Water Pollutant Discharge Standard for Rural Domestic Sewage Centralized Treatment Facilities". The effluent can be used to irrigate farmland or directly discharged into the receiving water body;

[0008] 3) Chlorella is attached by biofilm method. Chlorella is a kind of microalgae widely used in water treatment industry. As time goes by, Chlorella attached to elastic filler synthesizes various organic matters through photosynthesis and can release oxygen continuously. In addition, it can cut water flow and produce oxygen to increase oxygen for the system, realize unpowered oxygenation, and provide bacteria reproduction and metabolism. Bacteria can decompose organic matters, release CO2 and inorganic ions for algae growth, and cooperate with aerobic bacteria. Through the metabolism of the two, they promote each other to form bacteria-algae symbiosis, so that the whole biochemical system tends to be stable, saving energy consumption caused by aeration, and reducing the emission of greenhouse gas CO2. In addition, it can effectively reduce pollutants, thereby improving sewage treatment efficiency.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, a plurality of first guide plates for extending the flow path of water are arranged in the anoxic pool.

[0011] The above further beneficial effects are: making the biochemical reaction more complete and the pollutant reduction rate higher.

[0012] Furthermore, the heights of all first guide plates fixed on the bottom of the anoxic pool decrease gradually along the water flow direction.

[0013] A further beneficial effect of the above method is that water can flow easily under the action of gravity.

[0014] Furthermore, a plurality of second guide plates for extending the flow path of water are arranged in the aerobic pool.

[0015] The above further beneficial effects are: making the biochemical reaction more complete and the pollutant reduction rate higher.

[0016] Furthermore, the second guide plate has saw teeth at one end through which the water flows, for cutting the water flow to produce oxygen.

[0017] The above further beneficial effect is that when water flows through the sawtooth, it can cut the water flow to produce oxygen, thereby continuously supplying oxygen to the aerobic pool. The combination of sawtooth cutting to produce oxygen, Chlorella producing oxygen, and hard polypropylene fiber being able to cut water flow to produce oxygen can fully meet the operation requirements of the entire system.

[0018] Furthermore, the heights of all second guide plates fixed on the bottom of the aerobic pool decrease gradually along the water flow direction.

[0019] A further beneficial effect of the above method is that water can flow easily under the action of gravity.

[0020] Furthermore, the regulating tank and the anoxic tank share a wall, and a first overflow port is provided on the shared wall, and a first grid is provided in the first overflow port; the anoxic tank and the aerobic tank share a wall, and a second overflow port is provided on the shared wall, and a second grid is provided in the second overflow port.

[0021] The above further beneficial effect is that pollutants of a certain size can be blocked by the first grid and the second grid to prevent them from flowing into the downward submerged flow artificial wetland and blocking the downward submerged flow artificial wetland, thereby ensuring stable operation of the entire device.

[0022] Furthermore, the rope-shaped artificial aquatic plants are made of vinylon and polyester materials with good hydrophilicity.

[0023] Furthermore, the elastic filler includes: a center line and polypropylene lines diverging from the center line to surrounding areas.

[0024] Furthermore, in the elastic filler, polyvinyl alcohol and polyester materials with good hydrophilicity are wound around the polypropylene thread close to the center line.

[0025] The further beneficial effects of the above-mentioned method are: the combination design of hard elastic filler and flexible hydrophilic material, the flexible hydrophilic material can play a good role in biofilm formation and pollutant reduction, the hard elastic filler can cut the water flow to produce oxygen, so it can simultaneously play the role of cutting the water flow to produce oxygen and serving as a microbial carrier. In addition, compared with the traditional activated sludge method, the membrane biological method has a faster start-up biofilm time, less sludge production, and a more stable system impact resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of the decentralized rural sewage treatment device with no-power oxygenation in the utility model;

[0027] Figure 2 It is a partial enlarged view of the second guide plate in the utility model.

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0029] 1. Regulating tank, 2. Anoxic tank, 3. Aerobic tank, 4. Downward submerged flow artificial wetland, 5. Rope-shaped artificial aquatic plants, 6. Elastic filler, 7. First guide plate, 8. Second guide plate, 810, sawtooth, 9. First grid, 10. Second grid. DETAILED DESCRIPTION

[0030] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0031] Example 1

[0032] like Figure 1 As shown, a decentralized rural sewage treatment device with non-powered oxygenation includes: a regulating tank 1, an anoxic tank 2, an aerobic tank 3 and a downward submerged artificial wetland 4, wherein the regulating tank 1, the anoxic tank 2, the aerobic tank 3 and the downward submerged artificial wetland 4 are sequentially connected along the water flow direction in a gravity manner, the effluent of the aerobic tank 3 flows into the water distribution pipe of the downward submerged artificial wetland 4, the anoxic tank 2 is arranged with rope-shaped artificial aquatic plants 5, the aerobic tank 3 is arranged with elastic filler 6, the elastic filler 6 is made of hard polypropylene, and Chlorella is attached to the elastic filler 6;

[0033] The combination of biological and ecological treatment is adopted, and the sewage first enters the regulating tank 1, and after the water quantity and water quality are adjusted, it flows into the anoxic tank 2 by gravity. In the anoxic tank 2, the macromolecular organic matter is decomposed into small molecular organic matter that is easy for microorganisms to use, and the denitrifying bacteria use the high concentration of organic carbon source to reduce the total nitrogen, and the polyphosphate bacteria store energy to provide electron donors for the reduction of total phosphorus in the aerobic stage. The rope-shaped artificial water grass 5 in the anoxic tank 2 is conducive to the biofilm of microorganisms, and then the water in the anoxic tank 2 flows into the aerobic tank 3 by gravity. The nitrifying bacteria in the aerobic tank 3 can effectively reduce ammonia nitrogen by using a small amount of carbon source, and the polyphosphate bacteria reduce the total phosphorus. The small molecular organic matter is further decomposed into carbon dioxide and water by aerobic microorganisms. After biological treatment, the sewage enters the downward submerged flow artificial wetland 4, and the pollutants are further reduced. The effluent of the downward submerged flow artificial wetland 4 meets the "Agricultural Irrigation Water Quality Standard" and the "Water Pollutant Discharge Standard for Rural Domestic Sewage Centralized Treatment Facilities", and the effluent can be used for irrigating farmland or directly discharged into the receiving water body;

[0034] Chlorella is attached by biofilm method. Chlorella is a kind of microalgae widely used in water treatment industry. As time goes by, the Chlorella attached to the elastic filler 6 synthesizes various organic matters through photosynthesis and can continuously release oxygen. In addition, it is combined with hard polypropylene fiber to cut water flow and produce oxygen, increase oxygen for the system, realize unpowered oxygenation, and provide bacteria reproduction and metabolism. The bacteria can decompose organic matter and release CO2 and inorganic ions for algae growth. In combination with aerobic bacteria, the metabolism of the two promotes each other to form a bacterial-algae symbiosis, so that the whole biochemical system tends to be stable, saves energy consumption caused by aeration, and reduces the emission of greenhouse gas CO2. In addition, it can effectively reduce pollutants, thereby improving the efficiency of sewage treatment.

[0035] Example 2

[0036] like Figure 1 As shown, this embodiment is a further improvement on the basis of embodiment 1, and the details are as follows:

[0037] A plurality of first guide plates 7 are arranged in the anoxic pool 2 to extend the water flow path, so that the biochemical reaction is more complete and the pollutant reduction rate is higher. In addition, the heights of all the first guide plates 7 fixed on the bottom of the anoxic pool 2 decrease gradually along the water flow direction, making it easier for water to flow by gravity.

[0038] Example 3

[0039] like Figure 1 , Figure 2 As shown, this embodiment is a further improvement on the basis of Embodiment 1 or 2, and the details are as follows:

[0040] A plurality of second guide plates 8 are arranged in the aerobic pool 3 to extend the flow path of the water flow, so that the biochemical reaction is more complete and the pollutant reduction rate is higher.

[0041] In addition, the second guide plate 8 has a sawtooth 810 at one end through which the water flows, which is used to cut the water flow to produce oxygen. When the water flows through the sawtooth 810, the water flow can be cut to produce oxygen, thereby continuously supplying oxygen to the aerobic pool 3. The combination of sawtooth cutting to produce oxygen, Chlorella producing oxygen, and hard polypropylene fiber being able to cut water flow to produce oxygen can fully meet the operating requirements of the entire system.

[0042] The heights of all the second guide plates 8 fixed on the bottom of the aerobic pool 3 decrease gradually along the water flow direction, making it easier for water to flow by itself under the action of gravity.

[0043] Example 4

[0044] like Figure 1 As shown, this embodiment is a further improvement on any one of Embodiments 1 to 3, and the details are as follows:

[0045] The regulating tank 1 and the anoxic tank 2 share a wall, and a first overflow port is provided on the shared wall, and a first grid 9 is provided in the first overflow port; the anoxic tank 2 and the aerobic tank 3 share a wall, and a second overflow port is provided on the shared wall, and a second grid 10 is provided in the second overflow port; the first grid 9 and the second grid 10 can block pollutants of a certain size to avoid flowing into the downward submerged flow artificial wetland 4 and blocking the downward submerged flow artificial wetland 4, thereby ensuring stable operation of the entire device.

[0046] Example 5

[0047] like Figure 1 As shown, this embodiment is a further improvement on any one of Embodiments 1 to 4, and the details are as follows:

[0048] The rope-shaped artificial water grass 5 is made of vinylon and polyester materials with good hydrophilicity, which is conducive to the formation of microbial biofilm.

[0049] In addition, the elastic filler 6 includes: a center line and polypropylene lines diverging from the center line. The polypropylene lines close to the center line in the elastic filler 6 are wound with hydrophilic vinyl and polyester materials. The hard elastic filler and the flexible hydrophilic material are combined and designed. The flexible hydrophilic material can achieve good biofilm formation and pollutant reduction effects. The hard elastic filler can cut water flow to produce oxygen, so it can simultaneously cut water flow to produce oxygen and serve as a microbial carrier. In addition, compared with the traditional activated sludge method, the membrane biological method has a faster start-up biofilm formation time, less sludge production, and a more stable system impact resistance.

[0050] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A decentralized rural sewage treatment device with unpowered oxygenation, characterized in that: include: A regulating pool (1), an anoxic pool (2), an aerobic pool (3) and a downward submerged flow artificial wetland (4) are connected in sequence along a water flow direction by gravity, a rope-shaped artificial aquatic plant (5) is arranged in the anoxic pool (2), an elastic filler (6) is arranged in the aerobic pool (3), the elastic filler (6) is made of hard polypropylene, and Chlorella is attached to the elastic filler (6).

2. A decentralized rural sewage treatment device with unpowered oxygenation according to claim 1, characterized in that: A plurality of first guide plates (7) for extending the flow path of water are arranged in the anoxic pool (2).

3. A decentralized rural sewage treatment device with unpowered oxygenation according to claim 2, characterized in that: The heights of all first guide plates (7) fixed on the bottom of the anoxic pool (2) gradually decrease along the water flow direction.

4. A decentralized rural sewage treatment device with unpowered oxygenation according to claim 1, characterized in that: A plurality of second guide plates (8) for extending the flow path of water are arranged in the aerobic pool (3).

5. A decentralized rural sewage treatment device with unpowered oxygenation according to claim 4, characterized in that: The second guide plate (8) has saw teeth (810) at one end through which the water flows, for cutting the water flow to produce oxygen.

6. A decentralized rural sewage treatment device with unpowered oxygenation according to claim 4, characterized in that: The heights of all second guide plates (8) fixed on the bottom of the aerobic pool (3) gradually decrease along the water flow direction.

7. A decentralized rural sewage treatment device with unpowered oxygenation according to claim 1, characterized in that: The regulating tank (1) and the anoxic tank (2) share a wall, and a first overflow port is provided on the shared wall, and a first grid (9) is provided in the first overflow port; the anoxic tank (2) and the aerobic tank (3) share a wall, and a second overflow port is provided on the shared wall, and a second grid (10) is provided in the second overflow port.

8. The decentralized rural sewage treatment device with unpowered oxygenation according to claim 1, characterized in that: The elastic filler (6) comprises: a center line and polypropylene lines diverging from the center line to the surrounding areas.

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