CN213171659U - Autotrophic and heterotrophic double-layer filter material denitrification filter tank - Google Patents
Autotrophic and heterotrophic double-layer filter material denitrification filter tank Download PDFInfo
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- CN213171659U CN213171659U CN202021406014.0U CN202021406014U CN213171659U CN 213171659 U CN213171659 U CN 213171659U CN 202021406014 U CN202021406014 U CN 202021406014U CN 213171659 U CN213171659 U CN 213171659U
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Abstract
The utility model discloses an autotrophic heterotrophic double-layer filter material denitrification filter tank, relating to the field of sewage treatment. Comprises a sulfur autotrophic denitrification layer, a middle water layer and a heterotrophic denitrification layer which are sequentially distributed from top to bottom; wherein, a bearing plate is fixed below the sulfur autotrophic denitrification layer and the heterotrophic denitrification layer, and a plurality of filter holes are arranged on the bearing plate. The bottom of the autotrophic and heterotrophic double-layer filter material denitrification filter tank is communicated with a water inlet pipe and a heterotrophic backwashing pipe, the top of the autotrophic and heterotrophic double-layer filter material denitrification filter tank is communicated with a water outlet pipe, the water inlet pipe is further communicated with a return pipe, the other end of the return pipe is located above a sulfur autotrophic and denitrification layer, and a middle water layer is communicated with the sulfur autotrophic and backwashing pipe. The filter chamber does not need to add a C source, and can further treat the wastewater so as to improve the treatment efficiency and quality.
Description
Technical Field
The utility model relates to a sewage treatment field especially relates to an autotrophic heterotrophic double-deck filter material denitrification filtering pond.
Background
The discharge of pollutants is gradually increased along with the continuous development of society, so that the organic pollutants and nutrient substances in the water inlet of a sewage treatment plant are increased, and the pressure is brought to sewage treatment. The interest of people on water environment is increasing day by day, the sewage discharge standard is also gradually improved, organic pollutants and nutrient substances in sewage are reduced, especially the total nitrogen content in the sewage is reduced, denitrification and removal of suspended matters are achieved, and the method becomes the primary problem faced by urban sewage treatment plants at the present stage.
The denitrification biological filter as a nitrate nitrogen treatment technology has the advantages of good treatment effect, low SS (suspended solid) of effluent and the like. The traditional denitrification filter tank has the working principle that the same denitrifying bacteria convert nitrate/nitrite into nitrogen in an anoxic environment, the reaction takes an organic carbon source as an electron donor, the reaction process is very effective under the condition of rich carbon source, but when the wastewater with low C/N ratio is treated, the operation cost is increased due to the addition of a large amount of carbon source, and the development of the sewage denitrification technology is not facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a need not to throw the C source is provided, to waste water further treatment to improve the autotrophic heterotrophic double-deck filter material denitrification filtering pond of treatment effeciency and quality.
In order to solve the technical problem, the utility model discloses the technical scheme who takes is:
an autotrophic heterotrophic double-layer filter material denitrification filter tank is characterized in that,
the sulfur autotrophic denitrification layer, the middle water layer and the heterotrophic denitrification layer are sequentially distributed from top to bottom.
Wherein, a bearing plate is fixed below the sulfur autotrophic denitrification layer and the heterotrophic denitrification layer, and a plurality of filter holes are arranged on the bearing plate.
The bottom of the autotrophic and heterotrophic double-layer filter material denitrification filter tank is communicated with a water inlet pipe and a heterotrophic backwashing pipe, the top of the autotrophic and heterotrophic double-layer filter material denitrification filter tank is communicated with a water outlet pipe, the water inlet pipe is further communicated with a return pipe, the other end of the return pipe is located above a sulfur autotrophic and denitrification layer, and a middle water layer is communicated with the sulfur autotrophic and backwashing pipe.
The water inlet pipe, the return pipe, the heterotrophic backwashing pipe and the sulfur autotrophic backwashing pipe are all communicated with a water pump, and the water inlet pipe, the water outlet pipe, the heterotrophic backwashing pipe and the sulfur autotrophic backwashing pipe are all communicated with a valve.
The further technical scheme is that the top of the water outlet pipe is fixed with an overflow weir, and the water outlet pipe is connected to the periphery of the overflow weir.
The further technical proposal is that a water distribution pipe is laid at the bottom of the device, and the water inlet pipe and the heterotrophic backwashing pipe are communicated with the water distribution pipe.
The further technical proposal is that the supporting plate is fixed by angle iron below the supporting plate.
The further technical proposal is that one side of the heterotrophic denitrification layer is provided with a filter material replacing port.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
the utility model discloses have the double-deck filter material of autotrophy heterotrophy, compare with the filtering pond of individual layer filter material, can play the effect of further processing to waste water, effectively reduce the NO of play water3 --N concentration and SS.
And in addition, carbon source addition is not needed during use, the operation cost is low, and the problem of secondary pollution possibly caused by carbon source addition in heterotrophic denitrification is solved.
Meanwhile, by combining the autotrophic and heterotrophic double-layer filter materials, compared with a simple autotrophic denitrification biological filter, the denitrification efficiency is improved, the hydraulic retention time is shortened, and the treatment effect on the wastewater with low C/N ratio is good.
The reaction process is simple on the whole, and the multi-filter-hole bearing plate not only can play a role in supporting the filter material, but also can play a role in uniformly distributing water.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are 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, not all, embodiments of the present invention. Based on the embodiments only in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the specific details set forth herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
As shown in fig. 1, an autotrophic and heterotrophic double-layer filter material denitrification filter comprises a sulfur autotrophic denitrification layer 1, a middle water layer 2 and a heterotrophic denitrification layer 3 which are sequentially distributed from top to bottom; wherein, a bearing plate 4 is fixed below the sulfur autotrophic denitrification layer 1 and the heterotrophic denitrification layer 3, and a plurality of filter holes are arranged on the bearing plate 4. The bottom of the autotrophic and heterotrophic double-layer filter material denitrification filter tank is communicated with a water inlet pipe 101 and a heterotrophic backwashing pipe 102, the top of the autotrophic and heterotrophic double-layer filter material denitrification filter tank is communicated with a water outlet pipe 103, the water inlet pipe 101 is also communicated with a return pipe 104, the other end of the return pipe 104 is positioned above the sulfur autotrophic and denitrification layer 1, and the middle water layer 2 is communicated with a sulfur autotrophic and backwashing pipe 105. The water inlet pipe 101, the return pipe 104, the heterotrophic backwashing pipe 102 and the sulfur autotrophic backwashing pipe 105 are all communicated with a water pump 5, and the water inlet pipe 101, the water outlet pipe 103, the heterotrophic backwashing pipe 102 and the sulfur autotrophic backwashing pipe 105 are all communicated with a valve 6.
When the filter is in use, wastewater is pumped into the filter main body through the water inlet pipe 101 by the water inlet pump 5; clear water is pumped into the filter body by a water pump 5 through a heterotrophic backwashing pipe 102 and a sulfur autotrophic backwashing pipe 105, and valves 6 are arranged on a water inlet pipe 101, the heterotrophic backwashing pipe 102 and the sulfur autotrophic backwashing pipe 105; the supporting plate 4 with multiple filtering holes is fixed by L-shaped angle iron 41 to play a role of supporting the filtering material, and the filtering holes uniformly distributed on the supporting plate can play a role of uniformly distributing water.
The sulfur autotrophic denitrification layer 1 is positioned above the heterotrophic denitrification layer 3, and the wastewater is firstly heterotrophic denitrification carried out by the heterotrophic denitrification layer 3, so that COD and NO in the wastewater can be reduced3 -The content of-N and SS do not need to be added with carbon source, thus reducing the cost. The heterotrophic denitrification layer 3 microbial carrier mainly comprises light ceramsite, the height of a filter material is preferably 1.2-1.6m, heterotrophic denitrifying bacteria are hung on the carrier, the sulfur autotrophic denitrification layer 1 microbial carrier mainly comprises sulfur particles and dolomite, the height of the filter material is preferably 2.0-2.5m, and autotrophic denitrifying bacteria denitrificated thiobacillus is hung on the carrier; middle water layer 2 one side is equipped with sulphur autotrophy backwash pipe 105, the utility model discloses be equipped with two sets of back flush systems, according to the difference of filter material, set up different back flush intensity, increase the life of filter material. The wastewater is subjected to sulfur autotrophic denitrification in a sulfur autotrophic denitrification layer 1 to further remove NO in the wastewater3 --N and SS;
a valve 6 is arranged on the water outlet pipe 103, and the treated wastewater overflows through an overflow weir 7 and is discharged out of the filter tank through the water outlet pipe 103. When water is fed with NO3 -When N is too high, the water pump 5 on the return pipe 104 can be opened to make the treated wastewater flow back through the return pipe 104 and mix with the inlet water, and the quality of the treated wastewater is uniform. When the filter head loss reaches a certain degree, the valve 6 on the heterotrophic backwashing pipe 102 and the sulfur autotrophic backwashing pipe 105, the water pump 5 on the heterotrophic backwashing pipe 102 and the water pump 5 on the sulfur autotrophic backwashing pipe 105 need to be opened for backwashing, so as to remove solid particles intercepted from the filter material and old loose biological membranes attached to the biomass carriers.
Wherein, the filter material can be replaced through the filter material replacing port 9 after the filter tank is used for a period of time. The water distribution pipe 8 is connected with the water inlet pipe 101 and the heterotrophic backwashing pipe 102, and can play a role in uniformly distributing water.
In practical production and use, the aperture of the preferable multi-filter-hole bearing plate 4 is 20-25mm, the thickness of the filter material in the heterotrophic denitrification reaction zone is 1.2-1.6m, and the thickness of the filter material in the sulfur autotrophic denitrification reaction zone is 2.0-2.5 m. And the grain sizes of the light ceramsite, the sulfur and the dolomite are all 8-15mm, and the filling ratio of the sulfur granules to the dolomite is 3: 1-4: 1. in addition, Dissolved Oxygen (DO) <0.5 mg/L.
The above is only the preferred embodiment of the present invention, and any person can make some simple modifications, deformations and equivalent replacements according to the present invention, all fall into the protection scope of the present invention.
Claims (5)
1. An autotrophic heterotrophic double-layer filter material denitrification filter tank is characterized in that,
a sulfur autotrophic denitrification layer (1), a middle water layer (2) and a heterotrophic denitrification layer (3) which are sequentially distributed from top to bottom;
wherein a bearing plate (4) is fixed below the sulfur autotrophic denitrification layer (1) and the heterotrophic denitrification layer (3), and a plurality of filter holes are formed in the bearing plate (4);
the bottom of the autotrophic and heterotrophic double-layer filter material denitrification filter tank is communicated with a water inlet pipe (101) and a heterotrophic backwashing pipe (102), the top of the autotrophic and heterotrophic double-layer filter material denitrification filter tank is communicated with a water outlet pipe (103), the water inlet pipe (101) is also communicated with a return pipe (104), the other end of the return pipe (104) is positioned above the sulfur autotrophic denitrification layer (1), and the middle water layer (2) is communicated with a sulfur autotrophic backwashing pipe (105);
the water inlet pipe (101), the return pipe (104), the heterotrophic backwashing pipe (102) and the sulfur autotrophic backwashing pipe (105) are all communicated with a water pump (5), and the water inlet pipe (101), the water outlet pipe (103), the heterotrophic backwashing pipe (102) and the sulfur autotrophic backwashing pipe (105) are all communicated with a valve (6).
2. The autotrophic and heterotrophic double-layer filter material denitrification filter according to claim 1, wherein an overflow weir (7) is fixed at the top of the denitrification filter, and the water outlet pipe (103) is connected to the periphery of the overflow weir (7).
3. The denitrification filter with two layers of filter materials for autotrophic and heterotrophic culture according to claim 1, wherein a water distribution pipe (8) is laid at the bottom of the denitrification filter, and the water inlet pipe (101) and the heterotrophic backwashing pipe (102) are both communicated with the water distribution pipe (8).
4. The autotrophic and heterotrophic double-layer filter material denitrification filter according to claim 1, wherein the support plate (4) is fixed by angle iron (41) below the support plate.
5. The autotrophic and heterotrophic double-layer filter material denitrification filter according to claim 1, wherein a filter material replacement port (9) is formed at one side of the heterotrophic denitrification layer (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021406014.0U CN213171659U (en) | 2020-07-16 | 2020-07-16 | Autotrophic and heterotrophic double-layer filter material denitrification filter tank |
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| CN202021406014.0U CN213171659U (en) | 2020-07-16 | 2020-07-16 | Autotrophic and heterotrophic double-layer filter material denitrification filter tank |
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| CN213171659U true CN213171659U (en) | 2021-05-11 |
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| CN202021406014.0U Active CN213171659U (en) | 2020-07-16 | 2020-07-16 | Autotrophic and heterotrophic double-layer filter material denitrification filter tank |
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