CN216549815U - Internal circulation short-cut denitrification filter tank - Google Patents
Internal circulation short-cut denitrification filter tank Download PDFInfo
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- CN216549815U CN216549815U CN202122543331.8U CN202122543331U CN216549815U CN 216549815 U CN216549815 U CN 216549815U CN 202122543331 U CN202122543331 U CN 202122543331U CN 216549815 U CN216549815 U CN 216549815U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The application provides an internal circulation short-range denitrification filter, which comprises a tank body, an aerobic nitrification biological filter material layer, an anoxic denitrification biological filter material layer, an internal circulation water pipe, a water inlet pipe, a water outlet pipe and an aeration lifting pipe; the dissolved oxygen content in the sewage is improved by oxygenating with an aeration lifting pipe; the gas exhausted from the aeration lifting pipe is used for providing power to push the sewage in the internal circulation water pipe to flow upwards so as to realize the internal circulation flow of the sewage in the tank, and the internal circulation flow enables the sewage in the tank to flow through the aerobic nitrification biological filter material layer and the anoxic denitrification biological filter material layer for multiple times without stopping the circulation of the sewage; the sewage flows from top to bottom, and the dissolved oxygen content in the sewage is reasonably utilized to realize the aerobic nitrification biological treatment and the anoxic denitrification biological treatment; thereby remarkably improving the effect and efficiency of biological denitrification, being capable of treating various different types of sewage and remarkably improving the treatment capacity.
Description
Technical Field
The utility model relates to the technical field of biological sewage treatment, in particular to an internal circulation short-cut denitrification filter.
Background
The sewage treatment can be divided into a physical method, a biological method and a chemical method according to the functions of the sewage treatment. The biological method is to utilize the metabolism of microbe to decompose and oxidize the dissolved or colloidal organic matter into stable inorganic matter to purify sewage. Commonly used biological methods are an activated sludge method and a biofilm method.
A Biological Aerated Filter (BAF) is a novel sewage treatment process by a biofilm method, and has the functions of removing SS, COD and BOD, nitrifying, denitrifying, dephosphorizing and removing AOX (harmful substances). The aeration biological filter combines the filtering technology with a biological membrane method, adopts granular materials with smaller grain diameter as filtering materials, and the filtering material layer has two functions, namely, the biological filter is used as a carrier of microorganisms, has larger specific surface area compared with a common biological filter, ensures that the contact time of sewage and the biological membrane is longer, the biochemical reaction is carried out more thoroughly, and is used as a filtering medium for filtering and retaining suspended solids in water.
Biological denitrification refers to a process of converting organic nitrogen and ammonia nitrogen in sewage into nitrogen finally through ammoniation, nitration reaction and denitrification reaction under the combined action of microorganisms. The ammoniation reaction means that nitrogen-containing organic matters are decomposed and converted into NH under the metabolism of ammoniation functional bacteria4+The process of (1). The nitration reaction is completed by aerobic autotrophic microorganisms, and NH is treated by using inorganic nitrogen as a nitrogen source in an aerobic state4+To NO2-Then reoxidized to NO3-The process of (1). The denitrification reaction is that nitrite nitrogen and nitrate nitrogen are reduced into gaseous nitrogen (N) by denitrifying bacteria under the anoxic state2) The process of (1). Normal nitration is NH3Formation of nitrite NO2-To thereby produce nitrate NO3-. Under the condition of oxygen deficiency, nitrate radical generates nitrite radical and further generates N2Known as denitrification. By short-cut nitration is meant NH3Nitrite is generated, and nitrate is not generated any more; and direct formation of N from nitrite2Referred to as short-cut denitrification. By short-cut nitration and denitrification is meant NH3—NO2—N2Namely a process capable of removing ammonia nitrogen from water.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an internal circulation short-cut denitrification filter.
In order to solve the technical problems, the technical scheme provided by the utility model is as follows:
an internal circulation short-cut denitrification filter tank comprises a tank body, an aerobic nitrification biological filter material layer, an anoxic denitrification biological filter material layer, an internal circulation water pipe, a water inlet pipe, a water outlet pipe and an aeration lifting pipe, wherein the aeration lifting pipe is used for aeration lifting of sewage and improvement of dissolved oxygen content in the sewage;
the aerobic nitrification biological filter material layer and the anoxic denitrification biological filter material layer are both arranged in the cavity of the tank body, and the aerobic nitrification biological filter material layer is positioned above the anoxic denitrification biological filter material layer;
the internal circulating water pipe penetrates through the aerobic nitrification biological filter material layer and the anoxic denitrification biological filter material layer, a pipe orifice at the top end of the internal circulating water pipe is positioned above the aerobic nitrification biological filter material layer, and a pipe orifice at the bottom end of the internal circulating water pipe is positioned below the anoxic denitrification biological filter material layer;
the water inlet pipe is inserted into the internal circulating water pipe and is used for discharging sewage in the water inlet pipe into the internal circulating water pipe;
the aeration lifting pipe is inserted into the internal circulating water pipe, and the water outlet of the aeration lifting pipe is positioned at the inner bottom of the internal circulating water pipe, so that the gas discharged by the aeration lifting pipe provides power to push the sewage in the tank body to flow in an internal circulation manner;
the anaerobic denitrification biological filter comprises a tank body and is characterized in that an overflow groove for overflowing water is formed in the tank wall of the top of the tank body, a water outlet pipe for draining water is arranged on the tank wall of the bottom of the tank body, a water inlet of the water outlet pipe is located below an anaerobic denitrification biological filter material layer, and a water outlet of the water outlet pipe is inserted into the overflow groove.
Preferably, the water outlet of the water inlet pipe is positioned at the inner bottom of the inner circulating water pipe.
Preferably, an aerator is arranged on a water outlet pipe opening at the bottom end of the aeration lifting pipe.
Preferably, the aerobic nitrification biological filter material layer and the anoxic denitrification biological filter material layer both comprise filter materials for filtering, and microorganisms for sewage biological treatment are attached to the filter materials.
Preferably, a backwashing water inlet pipe for supplying backwashing water is arranged on the tank wall at the bottom of the tank body, and a water outlet of the backwashing water inlet pipe is positioned below the anoxic denitrification biological filter material layer so as to feed the backwashing water to the lower part of the anoxic denitrification biological filter material layer, so that the backwashing water flows from bottom to top in the tank body.
Preferably, a backwashing gas inlet pipe for supplying backwashing gas is arranged on the tank wall at the bottom of the tank body, and a gas outlet of the backwashing gas inlet pipe is positioned below the anoxic denitrification biological filter material layer so as to feed the backwashing gas to the lower part of the anoxic denitrification biological filter material layer, so that the backwashing gas flows from bottom to top in the tank body.
The application obtains the following beneficial technical effects:
1) in the application, the aeration lifting pipe is used for aeration lifting of sewage and oxygenation to improve the content of dissolved oxygen in the sewage; the sewage in the internal circulating water pipe flows upwards under the power provided by the gas discharged from the aeration lifting pipe, flows upwards and is discharged from the pipe orifice at the top end of the internal circulating water pipe, then flows from top to bottom and sequentially flows through the aerobic nitrification biological filter layer and the anoxic denitrification biological filter layer, and the sewage in the tank body and positioned below the anoxic denitrification biological filter layer flows into the internal circulating water pipe from the pipe orifice at the bottom end of the internal circulating water pipe, so that the internal circulating flow of the sewage in the tank body is realized, and the internal circulating flow enables the sewage in the tank body to circularly and repeatedly flow through the aerobic nitrification biological filter layer and the anoxic denitrification biological filter layer without stopping, thereby improving the contact chance, the contact area, the contact time and the like of the sewage and microorganisms on the filter material, and improving the contact chance, the contact area, the contact time and the like, the contact chance, the contact area, The larger the contact time and the like, the larger the sewage treatment capacity, efficiency, speed and the like of the microorganism, so that the filter has good mass transfer capacity, thereby remarkably improving the biological denitrification effect and efficiency of the internal circulation short-cut denitrification filter.
2) In the application, sewage flows from top to bottom and sequentially flows through an aerobic nitrification biological filter layer and an anoxic denitrification biological filter layer, the thickness of the anoxic denitrification biological filter layer is twice that of the aerobic nitrification biological filter layer, microorganisms in the aerobic nitrification biological filter layer firstly utilize high-content dissolved oxygen in the sewage to carry out aerobic nitrification biological treatment on the sewage, the dissolved oxygen content in the sewage after passing through the aerobic nitrification biological filter layer is obviously reduced into an anoxic state, the microorganisms in the anoxic denitrification biological filter layer utilize the dissolved oxygen content of the anoxic degree in the sewage to carry out anoxic denitrification biological treatment on the sewage, namely the sewage flows from top to bottom and sequentially passes through the aerobic nitrification biological treatment and the anoxic denitrification biological treatment, the dissolved oxygen content in the sewage is reasonably utilized to realize the aerobic nitrification biological treatment and the anoxic denitrification biological treatment, thereby remarkably improving the biological denitrification effect and efficiency of the internal circulation short-cut denitrification filter, being capable of treating various different types of sewage and remarkably improving the treatment capacity.
3) In the application, the sewage in the aerobic nitrification biological filter material layer flows from top to bottom, the sewage in the anoxic denitrification biological filter material layer flows from top to bottom, so that impurities such as suspended solids, products of biological treatment and the like in the sewage are mostly gathered at the upper part of the aerobic nitrification biological filter material layer and the upper part of the anoxic denitrification biological filter material layer, and backwash water and backwash gas in the tank body flow from bottom to top, namely, the flowing directions of the back washing water and the back washing gas are opposite, impurities in the upper part of the aerobic nitrification biological filter material layer and impurities in the upper part of the anoxic denitrification biological filter material layer can be more easily washed away upwards by the back washing water and the back washing gas which flow from bottom to top, and the impurities which are washed away upwards are accumulated at the upper liquid level in the tank body and are finally discharged from the overflow tank, so that the back washing is easier to carry out, and the back washing is more thorough and cleaner.
Drawings
FIG. 1 is a schematic structural diagram of an internal circulation short-path denitrification filter provided by an embodiment of the utility model (arrows in FIG. 1 represent the flowing direction of sewage or gas, and a dotted line in FIG. 1 is an upper liquid level when sewage is treated by normal organisms in a tank body);
in the figure: 1, a pool body is arranged in the pool body,
201 an aerobic nitrification biological filter material layer, 202 an anoxic denitrification biological filter material layer;
3 internal circulating water pipe, 4 water inlet pipe, 5 water outlet pipe, 6 aeration lifting pipe and 7 overflow groove;
8 back flushing water inlet pipe and 9 back flushing air inlet pipe.
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. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "axial," "radial," "longitudinal," "transverse," "length," "width," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings and are only used for convenience in describing and simplifying the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first", "second", may explicitly or implicitly include one or more of the features.
In the present invention, unless otherwise expressly stated or limited, the first feature being "on" or "under" the second feature may comprise the first and second features being in direct contact, or the first and second features being in contact, not directly, but via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Referring to fig. 1, in the figure: the device comprises a tank body 1, an aerobic nitrification biological filter material layer 201 and an anoxic denitrification biological filter material layer 202; an internal circulating water pipe 3, a water inlet pipe 4, a water outlet pipe 5, an aeration lifting pipe 6 and an overflow trough 7; a back washing water inlet pipe 8 and a back washing air inlet pipe 9.
The application provides an internal circulation short-range denitrification filter, which comprises a filter body 1, an aerobic nitrification biological filter material layer 201, an anoxic denitrification biological filter material layer 202, an internal circulation water pipe 3, a water inlet pipe 4, a water outlet pipe 5 and an aeration lifting pipe 6 for lifting sewage by aeration and improving the content of dissolved oxygen in the sewage;
the aerobic nitrification biological filter material layer 201 and the anoxic denitrification biological filter material layer 202 are arranged in the tank cavity of the tank body 1, and the aerobic nitrification biological filter material layer 201 is positioned above the anoxic denitrification biological filter material layer 202;
the internal circulating water pipe 3 penetrates through the aerobic nitrification biological filter material layer 201 and the anoxic denitrification biological filter material layer 202, a pipe orifice at the top end of the internal circulating water pipe 3 is positioned above the aerobic nitrification biological filter material layer 201, and a pipe orifice at the bottom end of the internal circulating water pipe 3 is positioned below the anoxic denitrification biological filter material layer 202;
the water inlet pipe 4 is inserted into the internal circulating water pipe 3, so that sewage in the water inlet pipe 4 is discharged into the internal circulating water pipe 3;
the aeration lifting pipe 6 is inserted into the internal circulating water pipe 3, the water outlet of the aeration lifting pipe 6 is positioned at the inner bottom of the internal circulating water pipe 3, so that the sewage in the internal circulating water pipe 3 is pushed to flow upwards by the power provided by the gas discharged by the aeration lifting pipe 6, the sewage in the internal circulating water pipe 3 flows upwards and is discharged from the top pipe orifice of the internal circulating water pipe 3, and the sewage in the tank body 1 and below the anoxic denitrification biological filter material layer 202 flows into the internal circulating water pipe 3 from the bottom pipe orifice of the internal circulating water pipe 3;
an overflow groove 7 for overflowing effluent is formed in the wall of the top of the tank body 1, a water outlet pipe 5 for draining water is arranged on the wall of the bottom of the tank body 1, a water inlet of the water outlet pipe 5 is located below the anoxic denitrification biological filter material layer 202, and a water outlet of the water outlet pipe 5 is inserted into the overflow groove 7.
In one embodiment of the present application, the outlet of the water inlet pipe 4 is located at the inner bottom of the inner circulating water pipe 3.
In one embodiment of the present application, an aerator is disposed on the water outlet pipe at the bottom end of the aeration lifting pipe 6.
In one embodiment of the present application, the aerobic nitrification biological filter material layer 201 and the anoxic denitrification biological filter material layer 202 both comprise a filter material for filtering, and microorganisms for biological sewage treatment are attached to the filter material.
In an embodiment of the present application, a back flush water inlet pipe 8 for supplying back flush water is arranged on the tank wall of the bottom of the tank body 1, and a water outlet of the back flush water inlet pipe 8 is located below the anoxic denitrification biological filter material layer 202 so as to send back flush water to the lower side of the anoxic denitrification biological filter material layer 202, so that the back flush water flows upwards from below in the tank body.
In an embodiment of the present application, a backwashing air inlet pipe 9 for supplying backwashing gas is arranged on a tank wall of the bottom of the tank body 1, and an air outlet of the backwashing air inlet pipe 9 is located below the anoxic denitrification biological filter material layer 202 so as to send the backwashing gas to the lower side of the anoxic denitrification biological filter material layer 202, so that the backwashing gas flows from bottom to top in the tank body.
In the application, a communicating hole for the sewage in the tank body to flow out to the overflow tank is arranged at the joint of the overflow tank 7 and the tank body 1, and a switch valve is arranged on the communicating hole, so that when the sewage is treated by normal organisms, the valve is closed, and the sewage in the tank body is discharged into the overflow tank 7 from the water outlet pipe 5 and then discharged from the overflow tank 7; and when back flushing is carried out, the valve is opened, and the sewage after back flushing flows out of the opened valve to the overflow groove 7 and then is discharged from the overflow groove 7.
In the application, the water inlet pipe 4, the water outlet pipe 5, the aeration lifting pipe 6, the backwashing water inlet pipe 8 and the backwashing air inlet pipe 9 are respectively provided with a regulating valve for opening and closing and regulating the flow, and all the regulating valves are opened and closed at the same time to form different sewage flow paths.
The application also provides a method for treating sewage by using the internal circulation short-cut denitrification filter tank, which uses any one of the internal circulation short-cut denitrification filter tank and comprises the following steps:
the gas discharged by the aeration lifting pipe provides power to push the sewage in the internal circulating water pipe to flow upwards, the sewage in the internal circulating water pipe flows upwards and is discharged from a pipe orifice at the top end of the internal circulating water pipe, then the sewage flows from top to bottom and sequentially flows through an aerobic nitrification biological filter material layer and an anoxic denitrification biological filter material layer, and the sewage in the tank body and below the anoxic denitrification biological filter material layer flows into the internal circulating water pipe from a pipe orifice at the bottom end of the internal circulating water pipe, so that the internal circulating flow of the sewage in the tank body is realized;
the aeration lifting pipe oxygenizes oxygen to the sewage in the internal circulating water pipe to improve the dissolved oxygen content in the sewage, microorganisms in an aerobic nitrification biological filter material layer firstly utilize the dissolved oxygen content of the oxygen enrichment degree in the upstream sewage to carry out aerobic nitrification biological treatment on the sewage, the dissolved oxygen content in the sewage after passing through the aerobic nitrification biological filter material layer is obviously reduced into an anoxic state, and the microorganisms in the anoxic denitrification biological filter material layer utilize the dissolved oxygen content of the anoxic degree in the downstream sewage to carry out anoxic denitrification biological treatment on the sewage, namely the sewage flows from top to bottom and sequentially passes through the aerobic nitrification biological treatment and the anoxic denitrification biological treatment.
In an embodiment of this application, be provided with the back flush inlet tube that is used for supplying backwash water on the pool wall of the bottom of cell body, the delivery port of back flush inlet tube is located the below of oxygen deficiency denitrification biological filter layer, the back flush inlet tube sends backwash water into the below of oxygen deficiency denitrification biological filter layer, backwash water is in from up flowing down in the pond cavity of cell body.
In an embodiment of the application, be provided with the back flush intake pipe that is used for supplying back flush gas on the pool wall of the bottom of cell body, the gas outlet of back flush intake pipe is located the below of oxygen deficiency denitrification biological filter layer, back flush intake pipe sends back flush gas into to the below of oxygen deficiency denitrification biological filter layer, back flush gas is in from up flowing down in the pond cavity of cell body.
The application obtains the following beneficial technical effects:
1) in the present application, the aeration lift pipe 6 is used for both aeration lifting of the sewage and oxygenation to increase the dissolved oxygen content in the sewage; the gas discharged from the aeration riser pipe 6 provides power to push the sewage in the internal circulating water pipe 3 to flow upwards, the sewage in the internal circulating water pipe 3 flows upwards and is discharged from the pipe orifice at the top end of the internal circulating water pipe 3, then the sewage flows from top to bottom and sequentially flows through the aerobic nitrification biological filter material layer 201 and the anoxic denitrification biological filter material layer 202, the sewage in the tank body 1 and below the anoxic denitrification biological filter material layer 202 flows into the internal circulating water pipe 3 from the pipe orifice at the bottom end of the internal circulating water pipe 3, so that the internal circulating flow of the sewage in the tank body is realized, the internal circulating flow enables the sewage in the tank body to flow through the aerobic nitrification biological filter material layer 201 and the anoxic denitrification biological filter material layer 202 for multiple times without stopping in circulation, and the contact opportunity, the contact area, the contact time and the like of the sewage and microorganisms on the filter material are improved, the larger the contact opportunity, contact area, contact time and the like are, the larger the sewage treatment capacity, efficiency, speed and the like of the microorganism are, so that the filter has good mass transfer capacity, and the biological denitrification effect and efficiency of the internal circulation short-cut denitrification filter are obviously improved.
2) In the application, sewage flows from top to bottom and sequentially flows through an aerobic nitrification biological filter layer 201 and an anoxic denitrification biological filter layer 202, the thickness of the anoxic denitrification biological filter layer 202 is twice that of the aerobic nitrification biological filter layer 201, microorganisms in the aerobic nitrification biological filter layer 201 firstly utilize high-content dissolved oxygen in the sewage to carry out aerobic nitrification biological treatment on the sewage, the dissolved oxygen content in the sewage after passing through the aerobic nitrification biological filter layer 201 is obviously reduced into an anoxic state, the microorganisms in the anoxic denitrification biological filter layer 202 utilize the dissolved oxygen content of anoxic degree in the sewage to carry out anoxic denitrification biological treatment on the sewage, namely, the sewage flows from top to bottom and sequentially passes through the aerobic nitrification biological treatment and the anoxic denitrification biological treatment, the dissolved oxygen content in the sewage is reasonably utilized to realize the aerobic nitrification biological treatment and the anoxic denitrification biological treatment, thereby remarkably improving the biological denitrification effect and efficiency of the internal circulation short-cut denitrification filter, being capable of treating various different types of sewage and remarkably improving the treatment capacity.
3) In the application, the sewage in the aerobic nitrification biological filter material layer flows from top to bottom, the sewage in the anoxic denitrification biological filter material layer flows from top to bottom, so that impurities such as suspended solids, products of biological treatment and the like in the sewage are mostly gathered at the upper part of the aerobic nitrification biological filter material layer and the upper part of the anoxic denitrification biological filter material layer, and backwash water and backwash gas in the tank body flow from bottom to top, namely, the flowing directions of the back washing water and the back washing gas are opposite, impurities in the upper part of the aerobic nitrification biological filter material layer and impurities in the upper part of the anoxic denitrification biological filter material layer can be more easily washed away upwards by the back washing water and the back washing gas which flow from bottom to top, and the impurities which are washed away upwards are accumulated at the upper liquid level in the tank body and are finally discharged from the overflow tank, so that the back washing is easier to carry out, and the back washing is more thorough and cleaner.
Methods and devices not described in detail in the present invention are all the prior art and are not described in detail.
The principles and embodiments of the present invention are explained herein using specific examples, which are set forth only to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (6)
1. An internal circulation short-cut denitrification filter tank is characterized by comprising a tank body, an aerobic nitrification biological filter material layer, an anoxic denitrification biological filter material layer, an internal circulation water pipe, a water inlet pipe, a water outlet pipe and an aeration lifting pipe, wherein the aeration lifting pipe is used for aeration lifting of sewage and improvement of dissolved oxygen content in the sewage;
the aerobic nitrification biological filter material layer and the anoxic denitrification biological filter material layer are both arranged in the cavity of the tank body, and the aerobic nitrification biological filter material layer is positioned above the anoxic denitrification biological filter material layer;
the internal circulating water pipe penetrates through the aerobic nitrification biological filter material layer and the anoxic denitrification biological filter material layer, a pipe orifice at the top end of the internal circulating water pipe is positioned above the aerobic nitrification biological filter material layer, and a pipe orifice at the bottom end of the internal circulating water pipe is positioned below the anoxic denitrification biological filter material layer;
the water inlet pipe is inserted into the internal circulating water pipe and is used for discharging sewage in the water inlet pipe into the internal circulating water pipe;
the aeration lifting pipe is inserted into the internal circulating water pipe, and the water outlet of the aeration lifting pipe is positioned at the inner bottom of the internal circulating water pipe, so that the gas discharged from the aeration lifting pipe provides power to push the sewage in the tank body to flow in an internal circulation manner;
the anaerobic denitrification biological filter comprises a tank body and is characterized in that an overflow groove for overflowing water is formed in the tank wall of the top of the tank body, a water outlet pipe for draining water is arranged on the tank wall of the bottom of the tank body, a water inlet of the water outlet pipe is located below an anaerobic denitrification biological filter material layer, and a water outlet of the water outlet pipe is inserted into the overflow groove.
2. The internal circulation short-path denitrification filter tank as claimed in claim 1, wherein the water outlet of the water inlet pipe is positioned at the inner bottom of the internal circulation water pipe.
3. The internal circulation short-cut denitrification filter according to claim 1, wherein an aerator is arranged on a water outlet pipe opening at the bottom end of the aeration lifting pipe.
4. The internal circulation short-cut denitrification filter according to claim 1, wherein the aerobic nitrification biological filter layer and the anoxic denitrification biological filter layer both comprise filter materials for filtering, and microorganisms for biological sewage treatment are attached to the filter materials.
5. The internal circulation short-path denitrification filter tank as claimed in claim 1, wherein a back-washing water inlet pipe for supplying back-washing water is arranged on the tank wall at the bottom of the tank body, and the water outlet of the back-washing water inlet pipe is positioned below the anoxic denitrification biological filter material layer for feeding back-washing water to the position below the anoxic denitrification biological filter material layer, so that the back-washing water flows from bottom to top in the tank body.
6. The internal circulation short-path denitrification filter tank as claimed in claim 1, wherein a back-flushing air inlet pipe for supplying back-flushing gas is arranged on the tank wall at the bottom of the tank body, and an air outlet of the back-flushing air inlet pipe is positioned below the anoxic denitrification biological filter material layer for feeding back-flushing gas to the position below the anoxic denitrification biological filter material layer, so that the back-flushing gas flows from bottom to top in the tank body.
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| CN202122543331.8U CN216549815U (en) | 2021-10-21 | 2021-10-21 | Internal circulation short-cut denitrification filter tank |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114133033A (en) * | 2021-10-21 | 2022-03-04 | 山东智博格瑞环保科技有限公司 | Internal circulation short-cut denitrification filter tank and sewage treatment method thereof |
| CN116535005A (en) * | 2023-06-29 | 2023-08-04 | 成都理工大学 | Intelligent synchronous nitrification and denitrification treatment system and method for domestic sewage |
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2021
- 2021-10-21 CN CN202122543331.8U patent/CN216549815U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114133033A (en) * | 2021-10-21 | 2022-03-04 | 山东智博格瑞环保科技有限公司 | Internal circulation short-cut denitrification filter tank and sewage treatment method thereof |
| CN116535005A (en) * | 2023-06-29 | 2023-08-04 | 成都理工大学 | Intelligent synchronous nitrification and denitrification treatment system and method for domestic sewage |
| CN116535005B (en) * | 2023-06-29 | 2023-09-01 | 成都理工大学 | Intelligent synchronous nitrification and denitrification treatment system and method for domestic sewage |
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