CN215627058U - Denitrifying biological filter - Google Patents
Denitrifying biological filter Download PDFInfo
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- CN215627058U CN215627058U CN202121221483.XU CN202121221483U CN215627058U CN 215627058 U CN215627058 U CN 215627058U CN 202121221483 U CN202121221483 U CN 202121221483U CN 215627058 U CN215627058 U CN 215627058U
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Abstract
The utility model belongs to the technical field of municipal engineering sewage treatment equipment, and discloses a denitrification biological filter, which comprises a filter body, wherein a water distribution layer, a filter layer, a packing layer and a clear water layer are sequentially arranged in the filter body from bottom to top; the filter body is connected with a sewage inlet pipe and a carbon source conveying device on the water distribution layer respectively, and a carbon source in the carbon source conveying device is a corncob soak solution; the filter body is connected with a back washing device on the water distribution layer; the filter body is provided with a water outlet pipe on the clear water layer. The utility model reduces the cost of the external carbon source of the denitrification filter tank, provides conditions for more effective denitrification reaction, reduces the total nitrogen content and the suspended matter concentration in the tail water of the sewage plant, and leads the effluent to meet the discharge standard. Simple structure, flexible operation and good popularization value for rural areas with high emission requirements.
Description
Technical Field
The utility model belongs to the technical field of municipal engineering sewage treatment equipment, and particularly relates to a denitrification biological filter.
Background
The total nitrogen content in the tail water of a sewage treatment plant is important, and the total nitrogen in the sewage is removed by using an anoxic tank and an aerobic tank by using general secondary treatment equipment. The denitrification filtering pond can carry out degree of depth denitrogenation to sewage treatment plant tail water to satisfy strict sewage discharge standard, simultaneously, the inside packing layer in denitrification filtering pond can the suspended solid in the filtration sewage, makes suspended solid concentration descend, and the denitrification filtering pond can get rid of the suspended solid in the sewage when carrying out degree of depth denitrogenation.
The traditional denitrification filter tank is usually high in use cost, adopts a liquid carbon source with an addition amount which is not easy to control as an additional carbon source required by the denitrification filter tank, is easy to cause resource waste, causes high operation cost, and is not suitable for advanced sewage treatment in rural areas. Therefore, a solid slow-release carbon source which is convenient to obtain and low in cost is needed to be used as an external carbon source of the denitrification filter, denitrification reaction can be efficiently carried out, and effluent meets the discharge standard, so that the sewage advanced treatment cost is reduced, and the method is suitable for more areas.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a denitrification biological filter, which can take corncob soak solution as an external carbon source of the denitrification filter, has low cost and convenient acquisition, can carry out denitrification reaction more efficiently, and can ensure that the effluent reaches the discharge standard.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a denitrification biological filter comprises a filter body, wherein a water distribution layer, a filter layer, a packing layer and a clear water layer are sequentially arranged in the filter body from bottom to top;
the filter body is connected with a sewage inlet pipe and a carbon source conveying device on the water distribution layer respectively, and a carbon source in the carbon source conveying device is a corncob soak solution; the filter body is connected with a back washing device on the water distribution layer; the filter body is provided with a water outlet pipe on the clear water layer;
the backwashing device comprises a backwashing air inlet pipe and a backwashing water inlet pipe, wherein the backwashing air inlet pipe and the backwashing water inlet pipe are both arranged on the outer wall of the filter body and are communicated with the water distribution layer.
In a possible implementation mode, the backwashing air inlet pipe and the backwashing water inlet pipe are both provided with a first control valve.
In a possible implementation manner, the packing layer is formed by laying a plurality of biological ceramsite.
In a possible implementation manner, the particle size of the biological ceramsite is 2-3mm, and the biological ceramsite is laid on the filter layer.
In a possible implementation manner, the filtering layer comprises a bearing plate and a pebble layer arranged on the bearing plate.
In a possible implementation mode, the sewage inlet pipe and the carbon source inlet pipe are both provided with a second control valve.
In a possible implementation mode, the carbon source conveying device comprises a carbon source water inlet pipe and a carbon source box, the carbon source water inlet pipe is connected with the carbon source box, and corncob soaking liquid is stored in the carbon source box.
Compared with the prior art, the utility model has the following beneficial effects:
according to the utility model, the corncob soak solution is used as the external carbon source of the denitrification biological filter, so that the adoption of a traditional carbon source with higher cost can be avoided, the cost of the external carbon source of the denitrification filter is greatly reduced, more effective conditions are provided for denitrification reaction, the total nitrogen and suspended matters in the tail water of a sewage plant can be more effectively removed, and the effluent meets the discharge standard; moreover, the denitrification filter is also provided with a back washing device, so that the continuous operation of the filter can be ensured; the utility model has simple structure and flexible operation, and has better popularization value in villages and small towns with high emission requirements.
Drawings
Fig. 1 is a schematic structural diagram of a denitrification biofilter according to an embodiment of the present application.
In the figure: 1-a filter body; 2-water outlet pipe; 3-clear water layer; 4-a filler layer; 5-carbon source water inlet pipe; 6-backwashing the air inlet pipe; 7-pebble bed; 8-a sewage inlet pipe; 9-a supporting plate; 10-backwashing a water inlet pipe; 11-water distribution layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
The utility model is further described with reference to the following figures and specific embodiments.
The embodiment of the application provides a denitrification biological filter, and it mainly can carry out denitrification to sewage and certain filtration treatment, can cooperate other sewage treatment device to carry out supporting use.
Referring to fig. 1, a denitrification biological filter according to an embodiment of the present disclosure may include a filter body 1, wherein a water distribution layer 11, a filter layer, a packing layer 4, and a clear water layer 3 are sequentially disposed in the filter body 1 from bottom to top; wherein, the arrangement sequence of the water distribution layer 11, the filter layer, the packing layer 4 and the clear water layer 3 from bottom to top is also the treatment sequence of sewage through each treatment layer.
With reference to fig. 1, the water distribution layer 11 of the filter body 1 is connected to a sewage inlet pipe 8 and a carbon source conveying device, respectively, and a carbon source in the carbon source conveying device is a corncob soaking solution; the filter body 1 is connected with a back washing device on the water distribution layer 11; the filter body 1 is provided with a water outlet pipe 2 on the clear water layer 3; the sewage inlet pipe 8 is connected with a sewage treatment plant and treats tail water of the sewage treatment plant; the carbon source conveying device is used for conveying the carbon source to the water distribution layer of the filter body, and the carbon source conveyed by the carbon source conveying device is a corn cob soaking solution which is obtained by soaking common agricultural wastes, namely corn cobs, in rural areas, so that the carbon source purchasing cost can be effectively reduced by using the corn cob soaking solution as the carbon source, the carbon source conveying device is convenient to obtain, and the resource utilization of the agricultural wastes can be promoted; and the backwashing device is connected with the water distribution layer 11 and is used for backwashing each treatment layer in the filter body 1, mainly flushing suspended matters and aged biological membranes on the filter layer and the packing layer 4 and discharging nitrogen in the denitrification process so as to ensure the continuous operation of the filter.
In some embodiments, the carbon source delivery device may comprise a tank for storing the carbon source, a delivery pump and water pipe, and a control valve; certainly, in order to ensure that the carbon source continuously provides the carbon source for the carbon source delivery device, the carbon source preparation or production device can be connected with the carbon source, for example, the corncob soaking solution is produced through the soaking tank or the reaction kettle, and the produced corncob soaking solution is delivered to the storage tank through the delivery pipe, so that the continuous output of the carbon source is realized, and the sewage treatment is better carried out.
As shown in fig. 1, the backwashing device includes a backwashing air inlet pipe 6 and a backwashing water inlet pipe 10, and both the backwashing air inlet pipe 6 and the backwashing water inlet pipe 10 are disposed on the outer wall of the filter body 1 and are communicated with the water distribution layer 11. The backwash air intake pipe 6 and the backwash water intake pipe 10 are used for intake and intake of water, respectively, to perform backwash by a mixed water flow having a certain air pressure and water pressure.
In some specific embodiments, the backwash air inlet pipe 6 may be connected to an air pump, the backwash water inlet pipe 10 may be connected to a clean pressurized water source, and the specific backwash strength may be adjusted according to actual conditions.
Referring to fig. 1, in the embodiment of the present application, the backwash air inlet pipe 6 and the backwash water inlet pipe 10 are both provided with a first control valve. Through the arrangement of the first control valve, the medium conveying of the backwashing air inlet pipe 6 and the backwashing water inlet pipe 10 can be conveniently and respectively controlled.
Referring to fig. 1, in the embodiment of the present application, the particle size of the bio-ceramsite is 2-3mm, and the bio-ceramsite is laid on the filter layer. The biological ceramsite is a novel biological membrane carrier filter material, has the advantages of light weight, large specific surface area, strong adsorption capacity and the like, and the biological ceramsite with the particle size of 2-3mm can play a better role in membrane hanging and filtering.
Referring to fig. 1, in the embodiment of the present application, the filter layer includes a support plate 9 and a pebble layer 7 disposed on the support plate 9. The support plate 9 is of a perforated plate structure, which facilitates the passage of sewage, but may also be of a frame structure with a sieve plate, and the pebble layer 7 is filled in the frame structure. The filtering layer of the structure can effectively filter impurities in sewage.
Referring to fig. 1, in the embodiment of the present application, the wastewater inlet pipe 8 and the carbon source inlet pipe 5 are both provided with a second control valve. Through the setting of second control flap, can be convenient for to the control of sewage inlet tube 8 and carbon source inlet tube 5.
In the embodiment of the application, the carbon source conveying device comprises a carbon source water inlet pipe 5 and a carbon source box, wherein the carbon source water inlet pipe 5 is connected with the carbon source box, and a corncob soaking solution is arranged in the carbon source box; the carbon source inlet pipe 5 is connected with a carbon source box (not shown in the figure), corn cob soaking liquid is stored in the carbon source box, and the carbon source box can be connected with the carbon source inlet pipe 5 through a water pump.
In some specific embodiments, a vent hole may be provided at the top of the filter body 1, and the vent hole may discharge gas generated in the filter body 1; in order to realize better sewage treatment effect, an air inlet pipe can be arranged at the bottom of the filter tank body 1, so that aeration is facilitated.
The working principle of the denitrification biological filter of the embodiment of the application is as follows:
firstly, configuring the amount of a carbon source in a carbon source box according to the quality of tail water of a sewage treatment plant, after finishing the start of forming a biomembrane on a filler layer 4 of the filter tank, opening a sewage inlet pipe 8 and a carbon source inlet pipe 5 which are connected with the tail water of the sewage treatment plant, closing a backwashing inlet pipe 10 and a backwashing inlet pipe 6, opening a water outlet pipe 2 to ensure that the filter tank can normally feed water and run, simultaneously feeding the carbon source and the tail water raw water of the sewage treatment plant into a water distribution layer 11 for mixing, leading the water surface to naturally rise through the gradual increase of the water inlet amount, intercepting some substances with larger sizes through a pebble layer 7 of a filter layer, continuously passing through the filler layer 4, fully contacting the sewage with the microorganisms on the filler layer 4, providing the carbon source for the microorganisms, and generating denitrification reaction, thereby achieving the aim of denitrification; the sewage can also filter suspended substances through the biological ceramsite of the packing layer 4, so that the concentration of suspended substances in the sewage is reduced, and the treated sewage is discharged out of the filter tank through a drain pipe of the clear water layer 3, thereby completing the processes of denitrification and removal of suspended substances. When the filter is backwashed, the carbon source water inlet pipe 5 and the sewage water inlet pipe 8 are closed, the backwash air inlet pipe 6 and the backwash water inlet pipe 10 are opened, and backwashing is carried out according to the designed flushing intensity, time and mode, so that large granular substances intercepted by the pebble layer 7 on the filtering layer, suspended matters on the biological ceramsite of the packing layer 4 and an aged biomembrane are discharged out of the filter body 1 through the water outlet pipe 2 of the clear water layer 3, and the continuous operation of the filter is ensured.
It should be noted that, the embodiment of the present application mainly uses advanced treatment of sewage in villages and towns, and especially aims at tail water of a sewage treatment plant which has a low carbon-nitrogen ratio and does not reach the standard of total nitrogen concentration and suspended matter concentration. Through experiments, the total nitrogen concentration of tail water of a sewage treatment plant can be reduced from 15-20mg/L to below 10mg/L by the denitrification biofilter, and the concentration of suspended matters in the effluent can be reduced to below 10 mg/L.
Different from the traditional denitrification biological filter, the denitrification biological filter provided by the embodiment of the application can be used for soaking common agricultural waste corncobs in rural areas to obtain corncob soaking solution, and the soaking solution is used as a carbon source, so that the carbon source purchase cost is reduced, the resource utilization of the agricultural waste is promoted, and the denitrification biological filter has a certain use value.
Finally, it should be noted that: the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a denitrification biological filter, includes filter body (1), its characterized in that: a water distribution layer (11), a filter layer, a packing layer (4) and a clear water layer (3) are sequentially arranged in the filter tank body (1) from bottom to top;
the filter body (1) is connected with a sewage inlet pipe (8) and a carbon source conveying device on the water distribution layer (11) respectively, and a carbon source in the carbon source conveying device is a corncob soaking solution; the filter body (1) is connected with a back washing device on the water distribution layer (11); the filter body (1) is provided with a water outlet pipe (2) on the clear water layer (3);
the backwashing device comprises a backwashing air inlet pipe (6) and a backwashing water inlet pipe (10), wherein the backwashing air inlet pipe (6) and the backwashing water inlet pipe (10) are arranged on the outer wall of the filter body (1) and are communicated with the water distribution layer (11).
2. A denitrification biofilter according to claim 1, wherein: the back washing air inlet pipe (6) and the back washing water inlet pipe (10) are both provided with a first control valve.
3. A denitrification biofilter according to claim 1, wherein: the packing layer (4) is formed by paving a plurality of biological ceramsite.
4. A denitrification biofilter according to claim 3, wherein: the particle size of the biological ceramsite is 2-3mm, and the biological ceramsite is laid on the filter layer.
5. A denitrification biofilter according to any one of claims 1-4, wherein: the filter layer comprises a bearing plate (9) and a pebble layer (7) arranged on the bearing plate (9).
6. A denitrification biofilter according to claim 1, wherein: and the sewage inlet pipe (8) and the carbon source inlet pipe (5) are both provided with second control valves.
7. A denitrification biofilter according to claim 1, wherein: the carbon source conveying device comprises a carbon source inlet pipe (5) and a carbon source box, wherein the carbon source inlet pipe (5) is connected with the carbon source box, and corncob soak solution is stored in the carbon source box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121221483.XU CN215627058U (en) | 2021-06-02 | 2021-06-02 | Denitrifying biological filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121221483.XU CN215627058U (en) | 2021-06-02 | 2021-06-02 | Denitrifying biological filter |
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| Publication Number | Publication Date |
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| CN215627058U true CN215627058U (en) | 2022-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121221483.XU Active CN215627058U (en) | 2021-06-02 | 2021-06-02 | Denitrifying biological filter |
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| CN (1) | CN215627058U (en) |
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2021
- 2021-06-02 CN CN202121221483.XU patent/CN215627058U/en active Active
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