Sewage treatment device based on SHARON-ANAMMOX composite constructed wetland

Abstract

The utility model relates to a sewage treatment device based on an SHARON-ANAMMOX composite constructed wetland, which is applied to the field of sewage treatment and comprises a soil layer, a substrate layer is arranged at the lower end of the soil layer, a working box is arranged at the lower end of the substrate layer, and a temperature control heating rod, a Sharon reactor, a partition plate and an Anammox reactor are sequentially and fixedly connected to the inner bottom wall of the working box from left to right. A plurality of drainage holes are formed in the lower end of the partition plate in a penetrating mode, the volume of the Sharon reactor is twice that of the Anammox reactor, the upper end and the lower end of the Sharon reactor are each fixedly connected with two first matrixes and two second matrixes, and a third matrix is fixedly connected between the Sharon reactor and the Anammox reactor. The method can reduce clogging caused by overhigh pollutant load of the constructed wetland and efficiently remove nitrogen and phosphorus, saves aeration cost, does not need an external carbon source, is low in sludge yield, can reduce the occupied area, and is beneficial to ecological environment construction in rural areas and small towns.

Description

Technical Field

[0001] The utility model relates to an artificial wetland sewage treatment device, in particular to a SHARON-ANAMMOX composite artificial wetland sewage treatment device applied in the field of sewage treatment. Background Art

[0002] Due to the complex terrain and low level of economic development in rural and small towns, it is difficult for municipal pipelines to collect sewage in a unified manner. Therefore, the phenomenon of indiscriminate discharge of sewage is common, which seriously affects the ecological environment in rural and small towns and even affects human health. Among the various sources of rural sewage, washing sewage accounts for the largest proportion, with high content of ammonia nitrogen and phosphorus, but does not contain harmful substances such as heavy metals, so it is conducive to the use of biotechnology for treatment.

[0003] Based on this phenomenon, sewage treatment in rural and small towns has attracted much attention. In recent years, due to the migration of population, the population density in rural and small towns is relatively small, and the pollution emissions are relatively low. In sewage treatment, more attention is paid to ecological protection, and more emphasis is placed on biochemical technologies such as artificial wetland treatment technology.

[0004] Existing research shows that artificial wetlands have advantages over traditional sewage treatment plants, such as low investment and low operating costs. Therefore, when treating sewage, choosing low-cost artificial wetlands has become a better choice. However, due to seasonal changes, production activities and other factors, there is also an increase in domestic sewage discharge, a gradual increase in pollution load, and an increase in ammonia nitrogen and phosphorus content. At this time, artificial wetlands cannot bear higher pollution, which may cause filler clogging, and the denitrification and phosphorus removal capabilities are not strong. Utility Model Content

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the utility model is that due to various reasons such as production activities, there is also an increase in the discharge of domestic sewage, the pollution load is gradually increasing, and the content of ammonia nitrogen and phosphorus is rising. At this time, the artificial wetland cannot bear the high pollution, which may cause clogging of the filler, and the denitrification and phosphorus removal capacity is not strong.

[0006] In order to solve the above problems, the utility model provides a sewage treatment device based on a SHARON-ANAMMOX composite artificial wetland, comprising a soil layer, a substrate layer is provided at the lower end of the soil layer, a working box is provided at the lower end of the substrate layer, a temperature control heating rod, a Sharon reactor, a partition and an Anammox reactor are fixedly connected to the inner bottom wall of the working box from left to right in sequence, a plurality of hydrophobic holes are penetrated through the lower end of the partition, the volume of the Sharon reactor is twice that of the Anammox reactor, two substrates one and two substrates two are fixedly connected to the upper and lower ends of the Sharon reactor, a substrate three is fixedly connected between the Sharon reactor and the Anammox reactor, a fixed plate is fixedly connected to the upper end of the substrate three, a water pump is fixedly connected to the upper end of the fixed plate, a water inlet pipe of the water pump penetrates the fixed plate and is connected to the substrate three, an annular pipe is fixedly connected in the Anammox reactor, a plurality of substrates four are fixedly connected to the inner wall of the annular pipe, a water outlet pipe of the water pump penetrates into the Anammox reactor and is connected to the annular pipe, and an end of the annular pipe away from the water pump penetrates the Anammox reactor and extends into the substrate layer.

[0007] In the above-mentioned SHARON-ANAMMOX composite artificial wetland sewage treatment device, the sewage entering the artificial wetland is pretreated to reduce the clogging of the artificial wetland caused by excessive pollutant load and efficiently remove nitrogen and phosphorus, while saving aeration costs, no external carbon source is required, the sludge output is low, and the land area can be reduced. In addition, the planting of cash crops can bring fixed income, organically combining biology and ecology, which is beneficial to the construction of the ecological environment in rural areas and small towns.

[0008] As a further improvement of the present application, an exhaust pipe is fixedly connected to the upper right end of the working box, and an automatic exhaust valve is fixedly installed on the outer surface of the exhaust pipe.

[0009] As a further improvement of the present application, a tubular aerator is also fixedly connected to the inner bottom wall of the working box, and the tubular aerator is located on the left side of the temperature control heating rod.

[0010] As a further improvement of the present application, the substrate one and the substrate two are staggeredly distributed, the filler of the substrate one is activated carbon, the filler of the substrate two is quartz sand, and both the substrate one and the substrate two are injected with nitrite activated sludge.

[0011] As a further improvement of the present application, the filler of substrate three is expanded clay, and aerobic bacterial sludge is injected into substrate three. The filler of substrate four is quartz sand, and anaerobic ammonium oxidation sludge modified by mixing perchlorate and anaerobic ammonium oxidation sludge in a volume ratio of 5:1 is injected into substrate four.

[0012] As a further improvement of the present application, the matrix layer is composed of zeolite, fly ash and steel slag, and the mixing ratio of zeolite, fly ash and steel slag is 1:1:1, thereby enhancing the wetland system's ability to remove phosphorus. The volume ratio of the matrix layer to the soil layer is 2:1, and a plurality of cattails are planted on the upper end of the soil layer.

[0013] In summary, in actual application, domestic sewage flows into the Sharon reactor through a pipeline, and substrates one and two are conducive to the rapid start-up of nitrite bacteria in the Sharon reactor. Then the sewage enters substrate three to consume oxygen in the sewage, providing anaerobic effect for the Anammox reactor. The water pressure is adjusted by a water pump, and at the same time, it enters the Anammox reactor to provide power. After the sewage enters the Anammox reactor, it passes through substrate four to shorten the time required for anaerobic ammonia oxidation reaction. Through this process, the remaining ammonia nitrogen and the newly generated nitrite nitrogen undergo anaerobic ammonia oxidation reaction to generate nitrogen gas for discharge. Then the sewage enters the vertical flow substrate layer and soil layer through the pipeline, and is absorbed by cattail, thereby pre-treating the sewage entering the artificial wetland, reducing the clogging caused by excessive pollutant load in the artificial wetland and efficiently removing nitrogen and phosphorus, while saving aeration costs, no external carbon source is required, the sludge output is low, and the land area can be reduced. In addition, the planting of cash crops can bring fixed income, organically combining biology and ecology, which is beneficial to the construction of ecological environment in rural areas and small towns. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of this application;

[0015] Figure 2 This is a schematic diagram of the internal structure of the working box of this application;

[0016] Figure 3 This is a schematic diagram of the partition structure of this application;

[0017] Figure 4 A cross-sectional view of the annular pipeline structure of the present application;

[0018] Figure 5 This is a schematic diagram of the substrate layer structure of the present application.

[0019] Description of the numbers in the figure:

[0020] 1 soil layer, 2 substrate layer, 3 working box, 4 temperature control heating rod, 5 Sharon reactor, 6 partition, 7 Anammox reactor, 8 substrate one, 9 substrate two, 10 substrate three, 11 fixed plate, 12 water pump, 13 annular pipe, 14 substrate four, 15 tubular aerator, 16 liquid nitrogen generator, 17 liquid nitrogen collection tank, 18 exhaust pipe. DETAILED DESCRIPTION

[0021] The application is described in detail below with reference to the accompanying drawings.

[0022] Figure 1 It shows: a sewage treatment device based on SHARON-ANAMMOX composite artificial wetland, including a soil layer 1, a substrate layer 2 is provided at the lower end of the soil layer 1, a working box 3 is provided at the lower end of the substrate layer 2, an exhaust pipe 18 is fixedly connected to the upper right end of the working box 3, and an automatic exhaust valve is fixedly installed on the outer surface of the exhaust pipe 18. A plurality of cattails are planted at the upper end of the soil layer 1. When the dissolved oxygen concentration is extremely low, polyphosphate bacteria release phosphates, which are directly absorbed by the roots of the cattails planted on the surface of the soil layer. Finally, the cattails are harvested and the phosphorus is thoroughly removed. The planting density of cattails is 16 plants per square meter. While treating sewage, it has a good landscape effect and is conducive to transforming the rural environment. In addition, as an economic crop, cattails can also bring certain economic benefits while treating sewage.

[0023] Figure 2 and Figure 3 It is shown that the inner bottom wall of the working box 3 is fixedly connected with a temperature control heating rod 4, a Sharon reactor 5, a partition 6 and an Anammox reactor 7 from left to right. The volume of the Sharon reactor 5 is twice that of the Anammox reactor 7. The setting of the temperature control heating rod 4 can control the temperature required by nitrite bacteria to be about 30-35°C. A plurality of hydrophobic holes are penetrated through the lower end of the partition 6. The inner bottom wall of the working box 3 is also fixedly connected with a tubular aerator 15. The tubular aerator 15 is located on the left side of the temperature control heating rod 4. Since the temperature will affect the dissolved oxygen content, the higher the temperature, the lower the dissolved oxygen content. Studies have found that low dissolved oxygen is conducive to the growth of denitrifying bacteria, but it must also be controlled within an appropriate range. Therefore, intermittent aeration can be performed through the tubular aerator 15 to provide oxygen, so that the dissolved oxygen content is controlled at 1.1-1.5 mg / L. Two substrates 1 8 and two substrates 2 9 are fixedly connected at both ends, a substrate 3 10 is fixedly connected between the Sharon reactor 5 and the Anammox reactor 7, a fixed plate 11 is fixedly connected to the upper end of the substrate 3 10, a water pump 12 is fixedly connected to the upper end of the fixed plate 11, a water inlet pipe of the water pump 12 passes through the fixed plate 11 and is connected to the substrate 3 10, a water outlet pipe of the water pump 12 passes through the Anammox reactor 7 and is connected to the annular pipe 13, an end of the annular pipe 13 away from the water pump 12 passes through the Anammox reactor 7 and extends into the substrate layer 2, the substrates 1 8 and the substrates 2 9 are staggered, the filler of the substrate 1 8 is activated carbon, the filler of the substrate 2 9 is quartz sand, the substrates 1 8 and the substrates 2 9 are both injected with nitrite activated sludge, the selection of activated carbon and quartz sand can increase the dissolved oxygen content, the filler of the substrate 3 10 is ceramsite, and aerobic bacteria sludge is injected into the substrate 3 10.

[0024] Figure 4It is shown that: an annular pipe 13 is fixedly connected to the Anammox reactor 7, a plurality of substrates 14 are fixedly connected to the inner wall of the annular pipe 13, the filler of the substrates 14 is quartz sand, and the substrates 14 are injected with anaerobic ammonium oxidation sludge modified by mixing perchlorate and anaerobic ammonium oxidation sludge in a volume ratio of 5:1.

[0025] Figure 5 It is shown that the matrix layer 2 is composed of zeolite, fly ash and steel slag, and the mixing ratio of zeolite, fly ash and steel slag is 1:1:1, and the volume ratio of the matrix layer 2 to the soil layer 1 is 2:1.

[0026] When in use, domestic sewage flows into the Sharon reactor 5 through the pipeline, and the substrate 1 8 and the substrate 2 9 are conducive to the rapid start-up of the nitrite-depleting bacteria in the Sharon reactor 5. Then the sewage enters the substrate 3 10 to consume the oxygen in the sewage, providing an anaerobic effect for the Anammox reactor 7. The water pressure is adjusted by the water pump 12, and the sewage enters the Anammox reactor 7 to provide power. After the sewage enters the Anammox reactor 7, it passes through the substrate 4 14 to shorten the time required for the anaerobic ammonium oxidation reaction. Through this process, the remaining ammonia nitrogen and the newly generated nitrite nitrogen undergo anaerobic ammonium oxidation reaction to generate nitrogen gas for discharge. Then the sewage enters the vertical flow substrate layer 2 and the soil layer 1 through the pipeline, and is then absorbed by the cattail, thereby pre-treating the sewage entering the artificial wetland, reducing the clogging caused by the excessive pollutant load in the artificial wetland, and efficiently removing nitrogen and phosphorus, while saving aeration costs, no external carbon source is required, the sludge output is low, and the land area can be reduced. In addition, the planting of cash crops can bring a fixed income, organically combining biology and ecology, which is beneficial to the construction of the ecological environment in rural areas and small towns.

[0027] In view of current practical needs, the protection scope of the above-mentioned implementation mode adopted in this application is not limited to this. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. A SHARON-ANAMMOX composite artificial wetland sewage treatment device, comprising a soil layer (1), characterized in that: A substrate layer (2) is provided at the lower end of the soil layer (1), a working box (3) is provided at the lower end of the substrate layer (2), a temperature-controlled heating rod (4), a Sharon reactor (5), a partition (6) and an Anammox reactor (7) are fixedly connected to the inner bottom wall of the working box (3) in sequence from left to right, a plurality of hydrophobic holes are penetrated through the lower end of the partition (6), and the volume of the Sharon reactor (5) is twice that of the Anammox reactor (7); The upper and lower ends of the Sharon reactor (5) are fixedly connected to two substrates one (8) and two substrates two (9); a substrate three (10) is fixedly connected between the Sharon reactor (5) and the Anammox reactor (7); a fixing plate (11) is fixedly connected to the upper end of the substrate three (10); a water pump (12) is fixedly connected to the upper end of the fixing plate (11); a water inlet pipe of the water pump (12) passes through the fixing plate (11) and is connected to the substrate three (10); an annular pipe (13) is fixedly connected inside the Anammox reactor (7); a plurality of substrates four (14) are fixedly connected to the inner wall of the annular pipe (13); a water outlet pipe of the water pump (12) passes through the Anammox reactor (7) and is connected to the annular pipe (13); an end of the annular pipe (13) away from the water pump (12) passes through the Anammox reactor (7) and extends into the substrate layer (2).

2. A SHARON-ANAMMOX composite artificial wetland sewage treatment device according to claim 1, characterized in that: An exhaust pipe (18) is fixedly connected to the upper right end of the working box (3), and an automatic exhaust valve is fixedly installed on the outer surface of the exhaust pipe (18).

3. The SHARON-ANAMMOX composite artificial wetland sewage treatment device according to claim 1 is characterized in that: The inner bottom wall of the working box (3) is also fixedly connected to a tubular aerator (15), and the tubular aerator (15) is located on the left side of the temperature control heating rod (4).

4. The SHARON-ANAMMOX composite artificial wetland sewage treatment device according to claim 1, characterized in that: The matrix one (8) and the matrix two (9) are arranged in an alternating manner.

5. The SHARON-ANAMMOX composite artificial wetland sewage treatment device according to claim 1, characterized in that: The volume ratio of the substrate layer (2) to the soil layer (1) is 2:1, and a plurality of cattails are planted on the upper end of the soil layer (1).

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