CN206447739U - A kind of wet field facilities for treating sewage - Google Patents

Abstract

A wetland sewage treatment device relates to a sewage treatment device. The purpose of the utility model is to solve the problems that the existing wetland sewage treatment device occupies a large area, the operating cost is high, the ability to treat organic matter of ammonia nitrogen in low-temperature heavily polluted water decreases, and the effluent quality does not meet the standard. A wetland sewage treatment device includes a solid-liquid separation tank, a water distribution device, an artificial wetland, a water collection device, a first biological filter, an oxygenation unit and a second biological filter. The oxygenation unit is equipped with the first biological filter; the solid-liquid separation tank, water distribution device, artificial wetland, water collection device, oxygenation unit and the second biological filter are arranged in sequence from left to right. In the utility model, the artificial wetland and the biological filter are used together to treat the wetland sewage, and the efficient removal of ammonia nitrogen in the low-temperature high-ammonia-nitrogen wetland sewage is realized. The utility model can obtain a wetland sewage treatment device.

Description

A wetland sewage treatment device

technical field

The utility model relates to a sewage treatment device.

Background technique

The deterioration of the water environment is becoming more and more serious. In recent years, issues such as water pollution, soil erosion, sandstorms, groundwater overexploitation, and wetland degradation have aroused great concern from the whole society. Water resources are a high degree of unity of quantity and quality. In the 21st century, my country is facing a crisis of water quantity, and at the same time, the crisis of water quality is even more serious. The crisis of water resources caused by water quality problems is even greater than the crisis of water quantity.

Wetlands include coral beaches, seagrass beds, tidal flats, and mangroves in coastal areas, as well as estuaries, rivers, freshwater swamps, lakes, salt marshes, salt lakes, and rice fields.

At present, wetland pollution is also becoming more and more serious. Wetland pollution is caused by industry, agriculture and human organisms. Wetland sewage needs to be treated urgently.

There are various existing sewage treatment systems and methods, mainly chemical methods, biological methods and biochemical methods. However, the devices used in these methods have more or less the following deficiencies: low treatment efficiency, large footprint, affected by seasonality, poor treatment effect of low-temperature wetland sewage and high construction and operation costs, ability to deal with ammonia nitrogen and organic matter in low-temperature heavily polluted water The problem of decline and effluent water quality is not up to standard.

Utility model content

The purpose of the utility model is to provide a wetland sewage treatment device to solve the problems of the existing wetland sewage treatment device, such as large floor area, high operating cost, reduced ability to treat ammonia nitrogen organic matter in low-temperature heavily polluted water, and substandard effluent quality.

A wetland sewage treatment device includes a solid-liquid separation tank, a water distribution device, an artificial wetland, a water collection device, a first biological filter, an oxygenation unit, and a second biological filter;

The upper end of the solid-liquid separation tank is provided with a wetland sewage water inlet, the bottom end of the solid-liquid separation tank is provided with a sludge discharge pipe, and a valve is provided on the sludge discharge pipe; the solid-liquid separation tank and the water distribution device pass through The inlet pipe of the water distribution device is connected, and the water distribution device is filled with gravel with a particle size of 10mm to 20mm;

The constructed wetland is sequentially provided with a water layer, a planting layer, a denitrification layer and a filler layer from top to bottom; the filler layer is filled with pebbles, gravel and crushed stones with a particle size of 10 mm to 15 mm; The denitrification layer is filled with sulfur particles, plant stem and leaf fragments and gravel; the planting layer is filled with soil and ceramsite, and emergent plants are planted in the planting layer; There are submerged plants and floating plants planted in the water layer, and there are many groups of ventilation pipes distributed in the water layer, each group of ventilation pipes is composed of vertical ventilation pipes and horizontal ventilation pipes, the vertical ventilation pipes stretch into the air, and the horizontal ventilation pipes The tubes are distributed in the water body;

The packing layer, the denitrification layer and the planting layer are all equipped with a water distribution system, and the water distribution system is composed of interconnected seepage pipes; There is a water inlet and a water outlet, the water inlet is connected with the water distribution device, and the water outlet is connected with the water collection device;

The described water collection device is filled with crushed stones with a particle size of 10 mm to 20 mm;

The oxygenation unit is provided with a first biological filter, the bottom of the oxygenation unit is provided with a pure oxygen source aeration head, and the first biological filter is connected to the water collection device through a water pipe;

The bottom of the first biofilter is provided with a first biofilter support layer, and the first biofilter filter material layer is provided above the first biofilter support layer, and the upper end of the first biofilter A plurality of drain holes of the first biofilter are distributed on the outer wall; the drain holes of the first biofilter are connected to the first biofilter and the oxygenation unit;

The bottom of the second biofilter is provided with a second biofilter support layer, and the second biofilter filter material layer is provided above the second biofilter support layer; the upper end of the second biofilter is provided with There is a water inlet of the second biofilter, and the water inlet of the second biofilter is connected to the oxygenation unit and the second biofilter;

The solid-liquid separation tank, water distribution device, artificial wetland, water collection device, oxygenation unit and second biofilter 7 are arranged in sequence from left to right.

Advantage of the utility model:

1. Wetland sewage enters the solid-liquid separation tank from the wetland sewage inlet, and stands still in the solid-liquid separation tank. The precipitated sludge is discharged from the sludge discharge pipe, and the separated wetland sewage is discharged from the water distribution device inlet pipe Enter the water distribution device, the sewage in the water distribution device enters the constructed wetland through the water inlet, and uses plants, artificial media, fillers and microorganisms in the constructed wetland to complete the triple synergy of physics, chemistry and biology;

3. There are multiple sets of ventilation pipes in the water layer, which can strengthen the reoxygenation in the water layer, so that the sewage can fully contact and react with microorganisms and plants;

Four, the utility model is provided with a two-stage biofilter, and an oxygenation unit is provided in the two-stage biofilter; the second biofilter can receive the biological colonies lost in the first biofilter, and improve the biological and wetland sewage. The effective contact time of pollutants can make up for the lack of biological activity in the low temperature period; at the same time, the oxygenation unit can replenish dissolved oxygen again, which improves the biological activity of the secondary biofilter; if it is not in a low temperature period, only a single Level biological filter to reduce energy consumption;

5. The first biofilter in a wetland sewage treatment device of the present invention adopts an upward flow mode, and the water flow state is improved through the optimization of the water flow mode, and the matrix blockage is reduced; in the first biofilter and the second biofilter , ammonia nitrogen is gradually biodegraded and converted into nitrite and nitrate, accompanied by ammonia oxidation by heterotrophic nitrifying bacteria and denitrification by aerobic denitrification bacteria. Therefore, it can effectively remove high ammonia nitrogen in wet sewage ;

6. In this utility model, the artificial wetland and the biological filter are used together to treat the wetland sewage, which realizes the efficient removal of ammonia nitrogen in the high ammonia nitrogen wetland sewage at a low temperature below 4°C, and the quality of the effluent reaches the standard, and the installation is simple, the operation and management are convenient, and the project infrastructure and operation Low cost and good landscape effect, suitable for wetland sewage treatment;

7. The utility model solves the problems that the existing wetland sewage treatment device occupies a large area, the operating cost is high, the ability to treat ammonia nitrogen organic matter in low-temperature heavily polluted water is reduced, and the effluent quality is not up to standard.

The utility model can obtain a wetland sewage treatment device.

Description of drawings

Fig. 1 is a schematic structural diagram of a wetland sewage treatment device described in Embodiment 1.

detailed description

Specific embodiment 1: This embodiment is a wetland sewage treatment device including a solid-liquid separation tank 1, a water distribution device 2, an artificial wetland 3, a water collection device 4, a first biological filter 5, an oxygenation unit 6 and a second Biofilter 7;

The upper end of the solid-liquid separation tank 1 is provided with a wetland sewage water inlet 13, the bottom end of the solid-liquid separation tank 1 is provided with a sludge discharge pipe 1-1, and the sludge discharge pipe 1-1 is provided with a valve 1-2 ; The solid-liquid separation tank 1 and the water distribution device 2 are connected through the water distribution device inlet pipe 2-1, and the water distribution device 2 is filled with crushed stones with a particle size of 10 mm to 20 mm;

The constructed wetland 3 is sequentially provided with a water layer 3-4, a planting layer 3-3, a denitrification layer 3-2 and a packing layer 3-1 from top to bottom; the packing layer 3-1 is composed of pebbles, gravel It is filled with gravel with a particle size of 10mm ~ 15mm; the denitrification layer 3-2 is filled with sulfur particles, plant stem and leaf fragments and gravel; the planting layer 3- 3 is formed by mixing soil and ceramsite. Emergent plants 10 are planted in the planting layer 3-3; submerged plants 12 and floating plants 11 are planted in the water layer 3-4, and the water layer 3- There are many groups of ventilation pipes 9 distributed in 4, each group of ventilation pipes 9 is composed of vertical ventilation pipes and horizontal ventilation pipes, the vertical ventilation pipes stretch into the air, and the horizontal ventilation pipes are distributed in the water body;

The packing layer 3-1, the denitrification layer 3-2 and the planting layer 3-3 are all equipped with a water distribution system, and the water distribution system is composed of interconnected seepage pipes; the packing layer 3-1, denitrification Both the water distribution system in the layer 3-2 and the planting layer 3-3 are provided with a water inlet and a water outlet, the water inlet is connected with the water distribution device 2, and the water outlet is connected with the water collection device 4;

The water collecting device 4 is filled with crushed stones with a particle size of 10 mm to 20 mm;

The oxygenation unit 6 is provided with a first biological filter 5, the bottom of the oxygenation unit 6 is provided with a pure oxygen source aeration head, and the first biological filter 5 communicates with the water collection device 4 through a water pipe 8;

The bottom of the first biological filter 5 is provided with a first biological filter supporting layer 5-1, and above the first biological filter supporting layer 5-1 is provided with a first biological filter material layer 5- 2, and the outer wall of the upper end of the first biological filter 5 is distributed with some drainage holes 5-3 of the first biological filter; the drainage holes 5-3 of the first biological filter communicate with the first biological filter 5 and the oxygenation unit 6;

The bottom of the second biofilter 7 is provided with a second biofilter support layer 7-1, and above the second biofilter support layer 7-1 is provided with a second biofilter material layer 7- 2; The upper end of the second biofilter 7 is provided with a second biofilter water inlet 7-3, and the second biofilter water inlet 7-3 communicates with the oxygenation unit 6 and the second biofilter 7;

The solid-liquid separation tank 1, the water distribution device 2, the artificial wetland 3, the water collection device 4, the oxygenation unit 6 and the second biofilter 7 are arranged in sequence from left to right.

Figure 1 is a schematic structural view of a wetland sewage treatment device described in Embodiment 1. In Figure 1, 1 is a solid-liquid separation tank, 2 is a water distribution device, 3 is an artificial wetland, 4 is a water collection device, and 5 is the second A biological filter, 6 is an oxygenation unit, 7 is a second biological filter, 8 is a water pipe, 9 is a ventilation pipe, 10 is an emergent plant, 11 is a floating plant, 12 is a submerged plant, 13 is a wetland sewage inlet Water outlet, 1-1 is the sludge discharge pipe, 1-2 is the valve, 2-1 is the inlet pipe of the water distribution device, 3-1 is the packing layer, 3-2 is the denitrification layer, 3-3 is the planting layer, 3 -4 is the water layer, 5-1 is the supporting layer of the first biofilter, 5-2 is the filter material layer of the first biofilter, 5-3 is the drainage hole of the first biofilter, and 7-1 is the second The supporting layer of the second biological filter, 7-2 is the filter material layer of the second biological filter, and 7-3 is the water inlet of the second biological filter.

The advantage of this implementation mode:

1. The wetland sewage enters the solid-liquid separation tank 1 from the wetland sewage water inlet 13, and stands still in the solid-liquid separation tank 1. The precipitated sludge is discharged from the sludge discharge pipe 1-1, and the separated wetland sewage Enter the water distribution device 2 from the water distribution device inlet pipe 2-1, the sewage in the water distribution device 2 enters the constructed wetland 3 through the water inlet, and uses plants, artificial media, fillers and microorganisms in the constructed wetland 3 to complete the process. Triple synergy of physics, chemistry and biology;

3. The water layer 3-4 is provided with multiple groups of ventilation pipes 9, which can strengthen the reoxygenation in the water layer 3-4, so that the sewage can fully contact and react with microorganisms and plants;

Four, the present embodiment is provided with a two-stage biofilter, and an oxygenation unit 6 is provided in the two-stage biofilter; the second biofilter 7 can receive the biological colonies lost in the first biofilter 5, and improve the biological and The effective contact time of pollutants in wetland sewage can make up for the lack of biological activity in the low temperature period; at the same time, the oxygenation unit 6 can replenish dissolved oxygen again, which improves the biological activity of the secondary biofilter; if it is not in a low temperature period, it can also Only single-stage biological filter can be used to reduce energy consumption;

5. The first biofilter 5 in a wetland sewage treatment device of this embodiment adopts an upward flow mode, and the water flow state is improved through the optimization of the water flow mode, and the matrix blockage is alleviated; the first biofilter 5 and the second biofilter In pool 7, ammonia nitrogen is gradually biodegraded and transformed into nitrite and nitrate, accompanied by ammonia oxidation by heterotrophic nitrifying bacteria and denitrification by aerobic denitrification bacteria. high ammonia nitrogen;

6. In this embodiment, the artificial wetland and the biological filter are used together to treat the wetland sewage, which realizes the efficient removal of ammonia nitrogen in the high ammonia nitrogen wetland sewage at a low temperature below 4°C. Low cost and good landscape effect, suitable for wetland sewage treatment;

7. This embodiment solves the problems that the existing wetland sewage treatment devices occupy a large area, have high operating costs, decline in the ability to treat organic matter of ammonia nitrogen in low-temperature heavily polluted water, and the quality of effluent water is not up to standard.

In this embodiment, a wetland sewage treatment device can be obtained.

Embodiment 2: This embodiment differs from Embodiment 1 in that: the material of the supporting layer 5-1 of the first biological filter is pebbles, and the thickness is 0.35m-0.45m. Other steps are the same as in the first embodiment.

Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the supporting layer 7-1 of the second biological filter is made of pebbles with a thickness of 0.35m-0.45m. Other steps are the same as those in Embodiment 1 or 2.

Embodiment 4: The difference between this embodiment and Embodiments 1 to 3 is that the filler in the filter material layer 5-2 of the first biological filter is a mixture of zeolite, activated carbon and anthracite. Other steps are the same as those in Embodiments 1 to 3.

Embodiment 5: The difference between this embodiment and Embodiment 1 to Embodiment 4 is that the filler in the filter material layer 7-2 of the second biological filter is activated carbon. Other steps are the same as those in Embodiments 1 to 4.

Embodiment 6: This embodiment differs from Embodiment 1 to Embodiment 5 in that: the bottoms of the first biofilter 5 and the second biofilter 7 are equipped with air and water backwashing devices. Other steps are the same as those in Embodiments 1 to 5.

Embodiment 7: This embodiment differs from Embodiments 1 to 6 in that: the emergent aquatic plants are calamus, water celery, wild rice stem or lotus root. Other steps are the same as those in Embodiments 1 to 6.

Embodiment 8: The difference between this embodiment and one of Embodiments 1 to 7 is that the submerged aquatic plants are at least one of black algae, hornwort algae, royal bamboo grass, Elodea and bitter grass . Other steps are the same as those in Embodiments 1 to 7.

Embodiment 9: The difference between this embodiment and Embodiments 1 to 8 is that the floating aquatic plant is at least one of water hyacinth, Rhododendron and duckweed. Other steps are the same as those in Embodiments 1 to 8.

Embodiment 10: The difference between this embodiment and Embodiment 1 to Embodiment 9 is that the second biological filter 7 is provided with a water outlet. Other steps are the same as those in Embodiments 1 to 9.

Claims (10)

1. A wetland sewage treatment device is characterized in that a wetland sewage treatment device comprises a solid-liquid separation tank (1), a water distribution device (2), an artificial wetland (3), a water collection device (4), a first biological Filter (5), oxygenation unit (6) and second biofilter (7); The upper end of the solid-liquid separation tank (1) is provided with a wetland sewage water inlet (13), the bottom end of the solid-liquid separation tank (1) is provided with a sludge discharge pipe (1-1), and the sludge discharge pipe (1 -1) is provided with a valve (1-2); the solid-liquid separation tank (1) and the water distribution device (2) are connected through the water distribution device inlet pipe (2-1), and the water distribution device (2) Filled with gravel with a particle size of 10mm to 20mm; The constructed wetland (3) is sequentially provided with a water layer (3-4), a planting layer (3-3), a denitrification layer (3-2) and a filler layer (3-1) from top to bottom; The packing layer (3-1) is filled with pebbles, gravel and crushed stones with a particle size of 10mm to 15mm; the denitrification layer (3-2) is made of sulfur particles, plant stem and leaf fragments and crushed The planting layer (3-3) is filled by mixing soil and ceramsite, and emergent plants (10) are planted in the planting layer (3-3); the water layer Submerged plants (12) and floating plants (11) are planted in (3-4), and there are many groups of ventilation pipes (9) distributed in the water layer (3-4), and each group of ventilation pipes (9) consists of vertical Composed of ventilation pipes and horizontal ventilation pipes, the vertical ventilation pipes stretch into the air, and the horizontal ventilation pipes are distributed in the water body; The packing layer (3-1), the denitrification layer (3-2) and the planting layer (3-3) are all equipped with a water distribution system, and the water distribution system is composed of interconnected seepage pipes; the packing layer (3-1), the water distribution system in the denitrification layer (3-2) and the planting layer (3-3) are all provided with a water inlet and a water outlet, the water inlet is connected with the water distribution device (2), and the outlet The water outlet communicates with the water collecting device (4); The described water collection device (4) is filled with crushed stones with a particle size of 10mm to 20mm; Described oxygenation unit (6) is provided with first biofilter (5), and the bottom end of oxygenation unit (6) is provided with pure oxygen source aeration head, and first biofilter (5) passes water pipe ( 8) communicate with the water collecting device (4); The bottom of the first biological filter (5) is provided with a first biological filter supporting layer (5-1), and the first biological filter supporting layer (5-1) is provided with a first biological filter pool filter material layer (5-2), and the upper end outer wall of the first biofilter (5) is distributed with some drain holes (5-3) of the first biofilter; the drain holes (5-3) of the first biofilter -3) communicating with the first biofilter (5) and the oxygenation unit (6); The bottom of the second biological filter (7) is provided with a second biological filter supporting layer (7-1), and the second biological filter supporting layer (7-1) is provided with a second biological filter Pool filter material layer (7-2); the upper end of the second biofilter (7) is provided with a second biofilter water inlet (7-3), and the second biofilter water inlet (7-3) is connected to oxygenate Unit (6) and the second biofilter (7); The solid-liquid separation tank (1), water distribution device (2), constructed wetland (3), water collection device (4), oxygenation unit (6) and second biofilter (7) are from left to right Set in turn. 2. A wetland sewage treatment device according to claim 1, characterized in that the supporting layer (5-1) of the first biological filter is made of pebbles and has a thickness of 0.35m-0.45m. 3. A wetland sewage treatment device according to claim 1, characterized in that the second biological filter supporting layer (7-1) is made of pebbles with a thickness of 0.35m-0.45m. 4. A wetland sewage treatment device according to claim 1, characterized in that the filler in the filter material layer (5-2) of the first biological filter is a mixture of zeolite, activated carbon and anthracite. 5. A wetland sewage treatment device according to claim 1, characterized in that the filler in the filter material layer (7-2) of the second biological filter is activated carbon. 6. A wetland sewage treatment device according to claim 1, characterized in that the bottoms of the first biofilter (5) and the second biofilter (7) are equipped with air and water backwashing device. 7. A wetland sewage treatment device according to claim 1, characterized in that said emergent aquatic plants are calamus, water celery, wild rice stem or lotus root. 8 . A wetland sewage treatment device according to claim 1 , characterized in that the submerged aquatic plants are at least one of black algae, hornwort, imperial bamboo grass, elodea and bitter grass. 9. A wetland sewage treatment device according to claim 1, characterized in that said floating aquatic plants are at least one of water hyacinth, water hyacinth and duckweed. 10. A wetland sewage treatment device according to claim 1, characterized in that the second biological filter (7) is provided with a water outlet.