Biological membrane series constructed wetland wastewater treatment device

Abstract

The utility model provides a wastewater treatment device for a biological membrane series constructed wetland. The wastewater treatment device comprises a first filter unit, a biological membrane unit, a wetland unit and a second filter unit, a first partition plate with the bottom communicated is arranged between the first filtering unit and the biological membrane unit, a permeable second partition plate is arranged between the biological membrane unit and the kandelia candel planting unit, and a third partition plate with the bottom communicated is arranged between the kandelia candel planting unit and the sea horse tooth planting unit of the wetland unit. A permeable fourth partition plate is arranged between the sea horse tooth planting unit and the second filtering unit, a fifth partition plate with the top communicated is arranged between a denitrification part and a dephosphorization part of the kandelia candel planting unit, the denitrification part is filled with a gravel and activated carbon mixture, zeolite and grit, and the dephosphorization part is filled with stones, furnace slag and grit. The sea horse tooth planting unit is filled with a mixture of stones, oyster shells and rubbles. The method is beneficial to reducing the concentration of single antibiotics and mixed antibiotics, and has good resistance to different antibiotics and salinity changes.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental engineering, and specifically to a biofilm series artificial wetland wastewater treatment device. Background Art

[0002] Wetlands are called the lungs of the earth, and their importance is evident. After artificial cultivation and reasonable planning, well-built wetland facilities can not only treat wastewater, but also serve as landscapes.

[0003] In the related technology, in actual aquaculture, only a single type of antibiotic is rarely used, and antibiotics in water bodies mostly exist in mixed forms. Existing artificial wetland devices are mostly used to remove a certain type of antibiotic or a certain class of antibiotics. They are less effective in removing some mixed antibiotics and have poor resistance to different antibiotics and salinity changes. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems in the above-mentioned technology to a certain extent. To this end, the purpose of the utility model is to propose a biofilm series artificial wetland wastewater treatment device, which is conducive to reducing the concentration of single antibiotics and mixed antibiotics and has good resistance to different antibiotics and salinity changes.

[0005] To achieve the above-mentioned purpose, the utility model proposes a biofilm series artificial wetland wastewater treatment device, which includes a first filter unit, a biofilm unit, a wetland unit and a second filter unit arranged in sequence; the wetland unit has a candel planting unit and a seahorse tooth planting unit, a first partition connected at the bottom is provided between the first filter unit and the biofilm unit, a second partition that is permeable is provided between the biofilm unit and the candel planting unit, a third partition connected at the bottom is provided between the candel planting unit and the seahorse tooth planting unit, a permeable fourth partition is provided between the seahorse tooth planting unit and the second filter unit, the candel planting unit has a denitrification part and a phosphorus removal part, a fifth partition connected at the top is provided between the denitrification part and the phosphorus removal part, the denitrification part is filled with a mixture of sand and activated carbon, zeolite and gravel from bottom to top, the phosphorus removal part is filled with stones, slag and gravel from bottom to top, and the seahorse tooth planting unit is filled with a mixture of stones, oyster shells and coarse stones from bottom to top.

[0006] According to a biofilm-connected artificial wetland wastewater treatment device in an embodiment of the utility model, most of the antibiotics in the wastewater are removed by the biofilm unit, most of the nitrogen and phosphorus in the wastewater are removed by the cooperation of the denitrification part, the phosphorus removal part and the autumn candel, and the remaining nitrogen, phosphorus and antibiotics are removed by the seahorse teeth, thereby effectively reducing the concentration of single antibiotics and mixed antibiotics, and having good resistance to different antibiotics and salinity changes.

[0007] In addition, the biofilm series constructed wetland wastewater treatment device proposed in the above embodiment of the utility model may also have the following additional technical features:

[0008] Optionally, the first filter unit and the second filter unit are both filled with gravel.

[0009] Optionally, it also includes an aeration and oxygenation unit, which includes an aeration tank and a water distribution tank arranged in series, a pump is provided in the aeration tank to pump oxygen-rich water to the water distribution tank, and a water pump is provided in the water distribution tank to pass water into the first filtration unit.

[0010] Optionally, the biofilm unit further comprises an oxygenation pump, which is suitable for stirring and oxygenating the water in the biofilm unit.

[0011] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of a biofilm-connected constructed wetland wastewater treatment device according to an embodiment of the utility model;

[0013] Description of reference numerals:

[0014] The first filter unit 1, the biofilm unit 2, the wetland unit 3, the Kandelia ovali planting unit 31, the denitrification section 311, the phosphorus removal section 312, the seahorse tooth planting unit 32, the second filter unit 4, the first partition 5, the second partition 6, the third partition 7, the fourth partition 8, and the fifth partition 9. DETAILED DESCRIPTION

[0015] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0016] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0017] The following is combined with Figure 1The implementation of a biofilm series artificial wetland wastewater treatment device provided by the utility model is described in detail, and the direction of the arrow is the flow direction of the wastewater.

[0018] like Figure 1 As shown, the utility model provides a biofilm series constructed wetland wastewater treatment device, which includes a first filter unit 1, a biofilm unit 2, a wetland unit 3 and a second filter unit 4 arranged in sequence.

[0019] Specifically, the wetland unit 3 has a candel planting unit 31 and a seahorse planting unit 32, a first partition 5 connected at the bottom is provided between the first filtration unit 1 and the biofilm unit 2, a second partition 6 that is further permeable is provided between the biofilm unit 2 and the candel planting unit 31, a third partition 7 connected at the top is provided between the candel planting unit 31 and the seahorse planting unit 32, a permeable fourth partition 8 is provided between the seahorse planting unit 32 and the second filtration unit 4, the candel planting unit 31 has a denitrification section 311 and a phosphorus removal section 312, a fifth partition 9 connected at the top is provided between the denitrification section 311 and the phosphorus removal section 312, the denitrification section 311 is filled with a mixture of sand and activated carbon, zeolite, and gravel from bottom to top, the phosphorus removal section 312 is filled with stones, slag, and gravel from bottom to top, and the seahorse planting unit 32 is filled with a mixture of stones, oyster shells and coarse stones from bottom to top.

[0020] That is to say, the first partition 5 is arranged to facilitate wastewater to flow into the biofilm unit 2 from the bottom of the first filter unit 1. The biofilm unit 2 removes most of the antibiotics in the wastewater. The wastewater penetrates into the denitrification section 311 through the second partition 6 for denitrification treatment. The wastewater then flows into the phosphorus removal section 312 from the top of the third partition 7. Combined with the Kandelia ovata planted on the denitrification section 311 and the phosphorus removal section 312, most of the nitrogen and phosphorus in the wastewater can be removed. The wastewater flows to the hippocampus planting area through the fourth partition 8 to remove the remaining nitrogen, phosphorus and antibiotics. Finally, the treated wastewater penetrates into the second filter unit 4 through the fifth partition 9, and is discharged after being filtered by the second filter unit 4.

[0021] According to the biofilm-connected artificial wetland wastewater treatment device of the embodiment of the utility model, most of the antibiotics in the wastewater are removed by the biofilm unit 2, and most of the nitrogen and phosphorus in the wastewater are removed by the cooperation of the denitrification section 311, the phosphorus removal section 312 and the autumn candel, and the remaining nitrogen, phosphorus and antibiotics are removed by the seahorse teeth, thereby effectively reducing the concentration of single antibiotics and mixed antibiotics, and having good resistance to different antibiotics and salinity changes.

[0022] In some examples, the length, width, and height of the biofilm series artificial wetland wastewater treatment device are 200 cm, 40 cm, and 70 cm, respectively, and the operating water level is 60 cm.

[0023] In some examples, the length of the biofilm unit 2 can be set to 46 cm, with a 14 cm long first filter unit 1 in front, the filter matrix of the first filter unit 1 is 1 cm-1.2 cm gravel, and the biofilm unit 2 uses two QCIP-200 oxygen pumps (not shown) for oxygenation and also plays a stirring role.

[0024] In some examples, the volume of the sand and activated carbon mixture in the denitrification section 311 can be set to 38cm×40cm×20cm=30.4L, the particle size of the sand and activated carbon mixture is 0.8cm-1.2cm, the volume of the zeolite in the denitrification section 311 can be set to 38cm×40cm×20cm=30.4L, the particle size of the zeolite is 0.8cm-1.5cm, and the second partition 6 can be provided with a plurality of through holes to facilitate the water after biofilm treatment to flow into the denitrification section 311 to fill the sand and activated carbon mixture area.

[0025] In some examples, the volume of the stone in the dephosphorization section 312 can be set to 40.5×40cm×20cm=32.4L, the particle size of the stone is 2cm-3cm, the volume of the slag in the dephosphorization section 312 can be set to 40×40cm×20cm=32.0L, the particle size of the slag is 1.8cm-2.1cm, and the filling area of ​​the stone can extend to the bottom of the hippocampus implant unit 32.

[0026] In some examples, the length of the Kandelia ovata planting area of ​​the Kandelia ovata planting unit 31 is 79 cm, and the planting density is 44 plants / m3, wherein gravel with a particle size of 0.8 cm-1.5 cm is also filled between the Kandelia ovata and the denitrification section 311 and the phosphorus removal section 312, and its filling volume is 38.5 cm×40 cm×20 cm=30.8 L.

[0027] In some examples, the seahorse tooth planting area of ​​the seahorse tooth planting unit 32 is 42 cm long, the seahorse tooth planting density is 50 plants / m3, and a 14 cm long second filter unit 4 is placed at the rear. The filter matrix of the second filter unit 4 is 1 cm-1.2 cm gravel with a particle size, and the fifth partition plate 9 may be provided with a plurality of through holes to facilitate the flow of seahorse tooth-treated water into the second filter unit 4; the bottom of the seahorse tooth is filled with a mixture of 4 cm-8 cm oyster shells and 3 cm-5 cm coarse stones, and the filling volume is 42.5×40 cm×40 cm=68 L.

[0028] In some examples, the biofilm series artificial wetland wastewater treatment device also includes an aeration and oxygenation unit (not shown), the aeration and oxygenation unit includes an aeration tank and a water distribution tank arranged in series, a water pump is provided in the aeration tank to pump oxygen-enriched water to the water distribution tank, and a water pump is provided in the water distribution tank to pass water into the first filtration unit 1. Among them, the length, width and height of the aeration tank are 100cm, 60cm and 60cm respectively. The effective volume is 360L, and the aeration device uses two QCIP-200 type oxygenation pumps for oxygenation, and the built-in pumping device pumps the aerated oxygen-enriched water to the water distribution tank for standby use, and the effective volume of the water distribution tank is 250L, and the length, width and height are 100cm, 50cm and 50cm respectively. A built-in small water pump is connected to a rotor flowmeter to pass the wetland device.

[0029] The experimental results of the biofilm series constructed wetland wastewater treatment device according to the embodiment of the utility model are as follows:

[0030] According to the data in the "Xiamen Water Pollutant Discharge Standard" (DB35 / 322-2018), in view of the current status of marine aquaculture wastewater treatment, the water quality, salinity range and antibiotic concentration of the laboratory simulation operation water body are determined as shown in Table 1-3.

[0031] Table 1 Water quality of experimental water (unit: mg / L)

[0032]

[0033] Table 2 Salinity range of water used in the proposed experiment (unit: g / kg)

[0034]

[0035] Table 3 Antibiotic concentrations for experimental use (unit: mg / L)

[0036]

[0037] (2) COD of different antibiotics and mixed antibiotics at 30% salinity for 7 days in biofilm-connected constructed wetland wastewater treatment device at different salinities Mn The treatment effects are shown in Table 4.

[0038] Table 4

[0039]

[0040]

[0041] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0046] 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 biofilm-connected constructed wetland wastewater treatment device, characterized in that: It includes a first filter unit, a biofilm unit, a wetland unit and a second filter unit arranged in sequence; the wetland unit has a fall nut planting unit and a seahorse tooth planting unit, a first partition connected at the bottom is provided between the first filter unit and the biofilm unit, a second partition that is further permeable is provided between the biofilm unit and the fall nut planting unit, a third partition connected at the top is provided between the fall nut planting unit and the seahorse tooth planting unit, a permeable fourth partition is provided between the seahorse tooth planting unit and the second filter unit, the fall nut planting unit has a denitrification section and a phosphorus removal section, a fifth partition connected at the top is provided between the denitrification section and the phosphorus removal section, the denitrification section is filled with a mixture of sand and activated carbon, zeolite and gravel from bottom to top, the phosphorus removal section is filled with stones, slag and gravel from bottom to top, and the seahorse tooth planting unit is filled with a mixture of stones, oyster shells and coarse stones from bottom to top.

2. The biofilm-connected constructed wetland wastewater treatment device according to claim 1, characterized in that: The first filter unit and the second filter unit are both filled with gravel.

3. The biofilm-connected constructed wetland wastewater treatment device according to claim 1, characterized in that: It also includes an aeration and oxygenation unit, which includes an aeration tank and a water distribution tank arranged in series, a pump is provided in the aeration tank to pump oxygen-rich water to the water distribution tank, and a water pump is provided in the water distribution tank to pass water into the first filtering unit.

4. The biofilm-connected constructed wetland wastewater treatment device according to claim 1, characterized in that: The biofilm unit further comprises an oxygenation pump, which is suitable for stirring and oxygenating the water in the biofilm unit.

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