Tricking filtration and aerobic biological membrane coupled sewage treatment device

Abstract

The utility model provides a trickling filtration coupling aerobic biological membrane sewage treatment device which comprises a trickling filtration treatment unit and an aerobic biological membrane treatment unit which are arranged in a layered manner, and the trickling filtration treatment unit comprises a trickling filtration plate and a first biological membrane arranged on the surface of the trickling filtration plate; the aerobic biological membrane treatment unit comprises a V-shaped pool bottom and a pool body filled with a biological membrane filler; treated water at the bottom of the tank is lifted to the trickling filtration treatment unit by the circulating mechanism, and an aeration assembly is arranged at the bottom of the tank; an effluent weir and a water outlet are arranged on one side of the aerobic biological membrane treatment unit; the circulating mechanism comprises a lifting pump, a first water distribution pipe and a second water distribution pipe, an outlet of the lifting pump is communicated with the first water distribution pipe, the first water distribution pipe sequentially penetrates through the biological membrane filler, the trickling filter plate and the first biological membrane, and the first water distribution pipe is uniformly distributed on the first biological membrane. According to the utility model, the adaptability of the sewage treatment system to water quantity and water quality load changes is improved, and the water quality of sewage treatment is further improved.

Description

Technical Field

[0001] The present application relates to the technical field of sewage treatment, and in particular to a trickling filtration coupled aerobic biofilm sewage treatment device. Background Art

[0002] Sewage treatment is an important link in the utilization of water resources in cities and rural areas. In some rural areas, there is no relatively complete sewage collection and treatment system for the sewage generated. Untreated domestic sewage is directly discharged into the surrounding natural water bodies, causing serious pollution to the rural environment. The quality and quantity of domestic sewage in rural areas vary greatly. The three time periods of morning, noon and evening are the peak water consumption periods, and the water consumption at other times is very small. During the busy farming season, fertilizers and agricultural machinery cause the water quality of sewage to be poor. When treating sewage, the traditional unified collection and centralized treatment are generally adopted. During centralized treatment, the water quality load and water volume load change, resulting in the inability of the sewage treatment process to operate smoothly, and ultimately resulting in the inability of the treated water quality to meet the standards. How to choose a small, decentralizable, simple, low-cost sewage treatment method with small load resistance according to the dispersed rural settlements is the key to solving the water quality problem of rural sewage treatment. Utility Model Content

[0003] The embodiment of the utility model provides a trickling filtration coupled aerobic biofilm sewage treatment device, which realizes the treatment of rural sewage with a small, decentralized, simplified, low-cost, and large load-resistant process device, and solves the problem of poor water quality in existing rural sewage treatment.

[0004] The utility model provides a trickling filter coupled aerobic biofilm sewage treatment device, comprising a trickling filter treatment unit and an aerobic biofilm treatment unit arranged in layers, wherein the trickling filter treatment unit comprises a trickling filter plate and a first biofilm arranged on the surface of the trickling filter plate; the aerobic biofilm treatment unit comprises a "V"-shaped pool bottom and a pool body filled with biofilm fillers; the treated water at the pool bottom is lifted to the trickling filter treatment unit by a circulation mechanism, the pool bottom is provided with an aeration component, and the aeration component aerates the biofilm fillers; a water outlet weir and a water outlet are provided on one side of the aerobic biofilm treatment unit;

[0005] The circulation mechanism includes a lifting pump, a first water distribution pipe and a second water distribution pipe. The outlet of the lifting pump is connected to the first water distribution pipe. The first water distribution pipe is arranged to pass through the biofilm filler, the drip filter plate, and the first biofilm in sequence. The first water distribution pipe is connected to the second water distribution pipe above the first biofilm. The first water distribution pipe is evenly distributed above the first biofilm.

[0006] Optionally, the drip filter plate and the biofilm filler are spaced apart; the water outlet is lower than the surface of the biofilm filler; the sewage passes through the first biofilm, the drip filter plate, the biofilm filler in sequence and gathers at the bottom of the pool.

[0007] Optionally, the first biofilm includes a microbial community that decomposes organic matter, and the microbial community includes denitrifying bacteria.

[0008] Optionally, the aeration assembly includes a first air distribution pipe fixed on a "V"-shaped pool wall and an external air source, the first air distribution pipe is evenly provided with air holes, and the air source is configured to inflate the first air distribution pipe.

[0009] Optionally, it also includes a second air distribution pipe passing through the biofilm filler, and the second air distribution pipe is connected to the first air distribution pipe.

[0010] Optionally, a multi-layer structure is provided between the trickling filtration treatment unit and the aerobic biofilm treatment unit, and a water storage tank is provided between adjacent layers. A circulating pump is provided in the water storage tank, and the circulating pump circulates and distributes the treated water between adjacent layers through pipelines.

[0011] Optionally, a plurality of the second water distribution pipe arrays are provided, and the water inlet pipe intersects with the plurality of the second water distribution pipes.

[0012] Optionally, the biofilm filler is MBBR filler.

[0013] Optionally, it further comprises a holding box, wherein the trickling filtration treatment unit and the aerobic biofilm treatment unit are layeredly arranged inside the holding box.

[0014] The beneficial effects of the utility model are:

[0015] The utility model provides a trickling filter coupled aerobic biofilm sewage treatment device, comprising a layered trickling filter treatment unit and an aerobic biofilm treatment unit, the trickling filter treatment unit comprising a trickling filter plate and a first biofilm arranged on the surface of the trickling filter plate, after the sewage enters the trickling filter treatment unit, it flows through the first biofilm on the surface of the trickling filter plate, the sewage contacts the first biofilm, and solid and liquid phase substances are exchanged, and at the same time, the microorganisms in the first biofilm decompose the organic matter, so that the sewage is initially evolved to enter the aerobic biological treatment unit, and the effect of dephosphorization and denitrification in sewage treatment is improved; at the same time, the aerobic biofilm treatment unit comprises a "V"-shaped pool bottom and a pool body filled with biofilm fillers; the treated water at the pool bottom is lifted to the trickling filter treatment unit by a circulation mechanism, so that the treatment system can be flexibly handled, and even if the water volume of the sewage fluctuates too much, it does not affect the sewage treatment capacity of the system; in addition, an aeration component is arranged at the pool bottom, the aeration component aerates the biofilm filler, provides a good aerobic environment, and promotes the microorganisms in the biofilm filler to absorb and decompose the organic matter in the water; the finally treated water flows out from the outlet weir and the outlet on one side of the aerobic biofilm treatment unit. That is, the utility model improves the adaptability of the sewage treatment system to changes in water volume and water quality load, thereby improving the water quality of sewage treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic cross-sectional view of a trickling filtration coupled aerobic biofilm sewage treatment device provided in an embodiment of the present application is shown;

[0017] Figure 2 A schematic top view of a trickling filtration coupled aerobic biofilm sewage treatment device provided in an embodiment of the present application is shown;

[0018] Figure 3 A schematic diagram showing the relative positions of the trickling filtration treatment unit and the aerobic biofilm treatment unit in an embodiment of the present application;

[0019] Figure 4 A schematic diagram showing the forward installation positions of the first gas distribution pipe and the twelfth gas distribution pipe in the embodiment of the present application;

[0020] Figure 5 A schematic diagram showing a sewage treatment system composed of multiple sewage treatment units in an embodiment of the present application.

[0021] Reference numerals:

[0022] 1-1: trickling filter treatment unit; 1-2: aerobic biofilm treatment unit;

[0023] 1: water inlet; 2: lifting pump; 3: first water distribution pipe; 4: second water distribution pipe; 5: drip filter plate; 6: biofilm filler; 7: aeration assembly; 8: water outlet weir; 9: water outlet; 10: first air distribution pipe; 11: second air distribution pipe; 12: holding box. DETAILED DESCRIPTION

[0024] The technical solutions in the application embodiments will be described clearly and completely below in conjunction with the accompanying drawings in the application embodiments. In addition, the phrases "in one embodiment" or "in an embodiment" appearing in various places throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics may be combined in one or more embodiments in any suitable manner.

[0025] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between these entities. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the article or terminal device including the elements.

[0026] Regarding the sewage treatment problem in rural environments, because rural areas are dispersed, the amount of water varies greatly, the amount of water is different in the morning, noon and evening, and the amount of water is different in the rainy season and the dry season. In addition, the quality of sewage is different in different periods. For example, during the busy farming season, the use of fertilizers and agricultural machinery will increase the pressure of sewage treatment during this period, and the treated water quality is low. At present, most rural sewage treatment adopts the traditional unified collection and then centralized treatment. During centralized treatment, the water quality load and water volume load change, resulting in the sewage treatment process cannot run smoothly, and ultimately the treated water quality cannot meet the standard. Therefore, the utility model proposes a sewage treatment device that utilizes drip filtration coupled with aerobic biofilm. According to the dispersion of rural settlements, it can choose small, dispersible, simplified, low-cost, and small load-resistant sewage treatment according to local conditions.

[0027] The utility model embodiment provides a trickling filtration coupled aerobic biofilm sewage treatment device, see Figures 1 to 5 shown.

[0028] like Figure 1 , Figure 2 , Figure 3As shown, the utility model provides a trickling filtration coupled aerobic biofilm sewage treatment device, comprising a trickling filtration treatment unit 1-1 and an aerobic biofilm treatment unit 1-2 arranged in layers, the trickling filtration treatment unit 1-1 comprises a trickling filter plate 5 and a first biofilm arranged on the surface of the trickling filter plate 5; the aerobic biofilm treatment unit 1-2 comprises a "V"-shaped pool bottom and a pool body filled with a biofilm filler 6; the treated water at the pool bottom is lifted by a circulation mechanism to the trickling filtration treatment unit 1-1, and an aeration component 7 is arranged at the bottom of the pool, and the aeration component 7 aerates the biofilm filler 6; a water outlet weir 8 and a water outlet 9 are arranged on one side of the aerobic biofilm treatment unit 1-2.

[0029] Among them, the aforementioned circulation mechanism includes a lifting pump 2, a first water distribution pipe 3 and a second water distribution pipe 4. The outlet of the lifting pump 2 is connected to the first water distribution pipe 3. The first water distribution pipe 3 is arranged to pass through the biofilm filler 6, the drip filter plate 5, and the first biofilm in sequence. The first water distribution pipe 3 is connected to the second water distribution pipe 4 above the first biofilm, and the first water distribution pipe 3 is evenly distributed above the first biofilm.

[0030] As described above, the trickling filtration coupled aerobic biofilm sewage treatment device provided by the utility model comprises a layered trickling filtration treatment unit 1-1 and an aerobic biofilm treatment unit 1-2, the trickling filtration treatment unit 1-1 comprises a trickling filter plate 5 and a first biofilm arranged on the surface of the trickling filter plate 5, after the sewage enters the trickling filtration treatment unit 1-1, it flows through the first biofilm on the surface of the trickling filter plate 5, the sewage contacts the first biofilm, and solid-liquid phase substances are exchanged, at the same time, the microorganisms in the first biofilm decompose the organic matter, so that the sewage is initially evolved to enter the aerobic biological treatment unit, thereby improving the dephosphorization and denitrification efficiency of sewage treatment. effect; at the same time, the aerobic biofilm treatment unit 1-2 includes a "V"-shaped pool bottom and a pool body filled with biofilm fillers 6; the treated water at the pool bottom is lifted to the trickling filter treatment unit 1-1 by the circulation mechanism, so that the treatment system can flexibly handle and discharge, and even if the amount of sewage fluctuates too much, it will not affect the sewage treatment capacity of the system; in addition, an aeration component 7 is arranged at the pool bottom, and the aeration component 7 aerates the biofilm fillers 6, providing a good aerobic environment, and promoting the microorganisms in the biofilm fillers 6 to absorb and decompose organic matter in the water; the final treated water flows out from the outlet weir 8 and the outlet 9 on one side of the aerobic biofilm treatment unit 1-2. That is, the utility model improves the adaptability of the sewage treatment system to changes in water volume and water quality load, thereby improving the water quality of sewage treatment.

[0031] The circulation mechanism will sequentially pass through the first biofilm, the drip filter plate 5, the biofilm filler 6 and the treated water gathered at the bottom of the pool and lift it to the first biofilm again, thus realizing the recycling of the carbon source in the original sewage without the need for additional addition of carbon source, thereby achieving the purpose of energy saving and consumption reduction.

[0032] It should be noted that the first biofilm includes a microbial community that decomposes organic matter, and the microbial community includes denitrifying bacteria. Denitrifying bacteria directly use the trickling filter unit to denitrify the organic matter in the raw water, so that the carbon source of the raw water is fully utilized, and nitrate nitrogen is reduced to nitrogen gas, thereby improving the denitrification effect of the sewage treatment system.

[0033] The traditional trickling filtration method is widely used in the treatment of rural domestic sewage. The sewage flows through the filler with adsorption and interception function in the reactor. After cultivation, the first biofilm that can degrade pollutants such as COD (chemical oxygen demand), nitrogen and phosphorus in the sewage grows on the filler. The biofilm on the filler contains rich microorganisms, so the process has the effect of denitrification and phosphorus removal. Based on the traditional trickling filtration technology, this device couples the aerobic biofilm method with the process. The sewage is treated by secondary circulation through the trickling filtration and the biofilm filler 6, and has strong adaptability to the changes in water volume and water quality load. In the case of large changes in load and water volume, there is a certain hydraulic retention buffer and composite enhanced treatment. Even if the water supply is stopped for a period of time, the purification function of all biofilms in the system will not cause problems in the process operation. The system can be started quickly, which is suitable for the treatment of domestic sewage in rural areas with large coefficients of water quality and water volume changes. At the same time, through endogenous denitrification, the carbon source in the raw water can be fully utilized, which has the advantages of saving reagents, energy saving and consumption reduction.

[0034] This application solves the dual special factors of the changing load of water volume and water quality of rural sewage. The aerobic biofilm treatment method is coupled with the trickling filtration treatment method to replace the traditional sedimentation mud water separation. It has strong adaptability to changes in water quality and water volume: it effectively solves the problem of large fluctuations in rural sewage water volume and water quality load, and avoids the impact on process operation. It improves the amount of microorganisms in the system, increases the processing capacity and purification function: the biomass per unit tank volume is 5 to 20 times that of the activated sludge method, so it has a larger processing capacity and significantly improved purification function. The aerobic biofilm process is coupled with the trickling filtration process to replace the traditional sedimentation tank. The traditional process tail water must be equipped with a sedimentation tank or MBR membrane to separate the mud water. This reactor adopts the aerobic biofilm method coupled with the trickling filtration method to effectively solve the tail water separation and SS (suspended solids) indicators, without the need to set up a separate sedimentation tank or MBR membrane separation.

[0035] In addition, if Figure 1 or Figure 3As shown, the drip filter plate 5 and the biofilm filler 6 are spaced apart; the water outlet 9 is lower than the surface of the biofilm filler 6, and the sewage enters from the water inlet 1 and first contacts the drip filter plate 5, and the microbial components in the original sewage adhere to the drip filter plate 5 to form the first biofilm. The drip filter plate 5 does not contact the surface of the biofilm filler 6, and a certain interval is retained, so that the treated water passing through the drip filter plate 5 stays in the interval area for a short period of time, providing a certain reaction and processing time for the microorganisms in the biofilm, and at the same time achieving the effect of caching part of the treated water, which is conducive to maintaining the sewage treatment capacity when the water volume changes greatly. The treated water does not flow out from the bottom layer of the aerobic biofilm treatment unit 1-2, but flows out from between the aerobic biofilm treatment unit 1-2 and the drip filter treatment unit 1-1, ensuring that the treated water after the outflow is subjected to multiple cycles of treatment.

[0036] In some embodiments, the aeration assembly 7 includes a first air distribution pipe 10 fixed on the "V"-shaped pool wall and an external air source, the first air distribution pipe 10 is evenly provided with air holes, and the air source is configured to inflate the first air distribution pipe 10. Aeration is provided to the biofilm filler 6 from the bottom of the pool to provide an aerobic environment, which promotes the microorganisms in the biofilm to absorb and decompose organic matter in the water. On the one hand, being arranged at the bottom layer allows air to pass through the entire biofilm filler 6, thereby improving the aeration effect.

[0037] It can also be implemented as follows: Figure 4 As shown, it includes a second air distribution pipe 11 passing through the biofilm filler 6, and the second air distribution pipe 11 is connected to the first air distribution pipe 10. When the thickness of the biofilm filler 6 is large, the effect of aerating the bottom layer alone is limited, which may cause the biofilm filler 6 at a farther position to be unable to receive the aerated air. Therefore, the second air distribution pipe 11 is arranged in the thickness direction of the biofilm filler 6 to improve the aeration effect.

[0038] In some embodiments, the aforementioned biofilm filler 6 uses MBBR filler or rope-type filler to improve the nitrification and denitrification performance of the system.

[0039] In some embodiments, a plurality of second water distribution pipes 4 are arranged in an array, the water inlet pipe intersects with the plurality of second water distribution pipes 4, and a lifting pump 2 is arranged at the point where the treated water gathers at the bottom of the pool to lift the water at the bottom of the pool to the second water distribution pipe 4 of the drip filter treatment unit 1-1. The second water distribution pipe 4 distributes water from the middle and evenly distributes the water on the drip filter plate 5.

[0040] In addition, the present embodiment also includes a holding box 12, and the trickling filter treatment unit 1-1 and the aerobic biofilm treatment unit 1-2 are layered inside the holding box 12. As shown in FIG4, the box-type design makes the treatment system small and simple, convenient for decentralized arrangement, and also convenient for regular maintenance as an independent unit. Unlike a large treatment system, if there is a problem with a certain link, the entire system needs to be repaired or dismantled, which reduces unnecessary waste of materials and maintenance costs.

[0041] In some embodiments, the trickling filtration treatment unit 1-1 and the aerobic biofilm treatment unit 1-2 in the present application are separated by a multi-layer structure, and a water storage tank is included between adjacent layers. A circulating pump is provided in the water storage tank, and the circulating pump circulates and distributes the treated water between adjacent layers through pipelines.

[0042] like Figure 5 As shown, a trickling filter treatment unit 1-1 and an aerobic biofilm treatment unit 1-2 constitute a sewage treatment unit, a plurality of sewage treatment units are connected, and a water storage tank is set between adjacent sewage treatment units. A circulating pump is used to output the water in the water storage tank or circulate it among the plurality of sewage treatment units to further increase the quality of sewage treatment and increase the sewage throughput capacity of the entire sewage treatment system.

[0043] Finally, the utility model provides a trickling filtration coupled aerobic biofilm sewage treatment device, comprising a layered trickling filtration treatment unit 1-1 and an aerobic biofilm treatment unit 1-2, the trickling filtration treatment unit 1-1 comprising a trickling filter plate 5 and a first biofilm arranged on the surface of the trickling filter plate 5; the aerobic biofilm treatment unit 1-2 comprises a "V"-shaped pool bottom and a pool body filled with a biofilm filler 6; the treated water at the pool bottom is lifted to the trickling filtration treatment unit 1-1 by a circulation mechanism, an aeration component 7 is arranged at the pool bottom, and the aeration component 7 aerates the biofilm filler 6; a water outlet weir 8 and a water outlet 9 are arranged on one side of the aerobic biofilm treatment unit 1-2; the circulation mechanism comprises a lifting pump 2, a first water distribution pipe 3 and a second water distribution pipe 4, the outlet of the lifting pump 2 is connected to the first water distribution pipe 3, the first water distribution pipe 3 is arranged to pass through the biofilm filler 6, the trickling filter plate 5, and the first biofilm in sequence, the first water distribution pipe 3 is connected to the second water distribution pipe 4 above the first biofilm, and the first water distribution pipe 3 is evenly distributed above the first biofilm. The utility model improves the adaptability of the sewage treatment system to changes in water volume and water quality load, and further improves the water quality of sewage treatment.

[0044] It should be noted that the above embodiments all belong to the same utility model concept, and the description of each embodiment has its own focus. For the parts not described in detail in individual embodiments, reference can be made to the description in other embodiments. Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the embodiments can be referred to each other.

[0045] The above embodiments only express the implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A trickling filtration coupled aerobic biofilm sewage treatment device, characterized in that: The invention comprises a trickling filter treatment unit (1-1) and an aerobic biofilm treatment unit (1-2) arranged in layers, wherein the trickling filter treatment unit (1-1) comprises a trickling filter plate (5) and a first biofilm arranged on the surface of the trickling filter plate (5); the aerobic biofilm treatment unit (1-2) comprises a "V"-shaped pool bottom and a pool body filled with a biofilm filler (6); the treated water at the pool bottom is lifted to the trickling filter treatment unit (1-1) by a circulation mechanism; the pool bottom is provided with an aeration component (7), and the aeration component (7) aerates the biofilm filler (6); a water outlet weir (8) and a water outlet (9) are provided on one side of the aerobic biofilm treatment unit (1-2); The circulation mechanism comprises a lifting pump (2), a first water distribution pipe (3) and a second water distribution pipe (4); the outlet of the lifting pump (2) is connected to the first water distribution pipe (3); the first water distribution pipe (3) is arranged to pass through the biofilm filler (6), the drip filter plate (5) and the first biofilm in sequence; the first water distribution pipe (3) is connected to the second water distribution pipe (4) above the first biofilm; and the first water distribution pipe (3) is evenly distributed above the first biofilm.

2. The trickling filtration coupled aerobic biofilm sewage treatment device according to claim 1 is characterized in that: The drip filter plate (5) and the biofilm filler (6) are spaced apart; the water outlet (9) is lower than the surface of the biofilm filler (6); sewage passes through the first biofilm, the drip filter plate (5), the biofilm filler (6) in sequence and accumulates at the bottom of the pool.

3. The trickling filtration coupled aerobic biofilm sewage treatment device according to claim 1 is characterized in that: The first biofilm includes a microbial community that decomposes organic matter, and the microbial community includes denitrifying bacteria.

4. The trickling filtration coupled aerobic biofilm sewage treatment device according to claim 1 is characterized in that: The aeration assembly (7) comprises a first air distribution pipe (10) fixed on a "V"-shaped pool wall and an external air source, the first air distribution pipe (10) being evenly provided with air holes, and the air source being configured to inflate the first air distribution pipe (10).

5. The trickling filtration coupled aerobic biofilm sewage treatment device according to claim 4 is characterized in that: It also includes a second air distribution pipe (11) passing through the biofilm filler (6), and the second air distribution pipe (11) is connected to the first air distribution pipe (10).

6. The trickling filtration coupled aerobic biofilm sewage treatment device according to claim 4 is characterized in that: The trickling filtration treatment unit (1-1) and the aerobic biofilm treatment unit (1-2) are separated by a multi-layer structure, and a water storage tank is provided between adjacent layers. A circulating pump is provided in the water storage tank, and the circulating pump circulates and distributes the treated water between adjacent layers through pipelines.

7. The trickling filtration coupled aerobic biofilm sewage treatment device according to claim 3 is characterized in that: A plurality of the second water distribution pipes (4) are arranged in an array, and the water inlet pipe intersects with the plurality of the second water distribution pipes (4).

8. The trickling filtration coupled aerobic biofilm sewage treatment device according to claim 1, characterized in that: The biofilm filler (6) is MBBR filler.

9. The trickling filtration coupled aerobic biofilm sewage treatment device according to claim 1, characterized in that: It also comprises a containing box (12), wherein the trickling filtration treatment unit (1-1) and the aerobic biofilm treatment unit (1-2) are arranged in layers inside the containing box (12).

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