CN111675432B - Flow type sediment-based biochar electrochemical denitrification filter device - Google Patents
Flow type sediment-based biochar electrochemical denitrification filter device Download PDFInfo
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- CN111675432B CN111675432B CN202010548657.7A CN202010548657A CN111675432B CN 111675432 B CN111675432 B CN 111675432B CN 202010548657 A CN202010548657 A CN 202010548657A CN 111675432 B CN111675432 B CN 111675432B
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- box body
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- based biochar
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/163—Nitrates
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention discloses a flow type sediment-based biochar electrochemical denitrification filter device, which comprises a box body with a cover, a denitrification filter bed and an external power supply, wherein the box body is provided with a cover; wherein the denitrification filter bed comprises a metal filter screen positioned in the box body with the cover and a microorganism enricher arranged on the metal filter screen; the microorganism enricher comprises graphitized foam carbon and bottom sludge-based biochar for enriching denitrifying microorganisms; one end of the external power supply is connected with the metal filter screen, and the other end of the external power supply is connected with the box body with the cover; the box body with the cover is provided with the water inlet and the water outlet, the invention utilizes the external power supply to provide electrons for the denitrification process, has high treatment efficiency, reduces the cost of the external carbon source, also avoids the potential secondary pollution risk of the external carbon source to sewage, and has simple manufacturing process, low cost and convenient operation and maintenance.
Description
Technical Field
The invention particularly relates to a flow type sediment-based biochar electrochemical denitrification filter device, and belongs to the technical field of low-carbon-source sewage treatment.
Background
In sewage treatment, in a general denitrification process, organic matters are required to provide electrons for the denitrification process, and denitrification microorganisms reduce nitrate in sewage under an anoxic condition to release nitrogen or nitrous oxide. However, the sewage with low carbon source is lack of organic matters capable of providing electrons for the denitrification process, so that the denitrification process cannot be fully carried out, and the nitrate in the sewage cannot be completely degraded.
Therefore, the sewage treatment plant provides electrons for the denitrification process through an external carbon source, and the common external carbon source comprises methanol, sodium acetate, glucose and the like. But the production cost, transportation safety and the like of these substances limit the use thereof. The pH value of the sewage can be changed in the process of decomposing the external carbon source by the denitrifying microorganism, and the microorganism is adversely affected. Moreover, the amount of the external carbon source is difficult to control, and whether new contamination is generated in the process of utilizing the external carbon source by the microorganism is still to be examined. And the denitrification is carried out by utilizing the internal carbon source, the volume of the device needs to be increased, the microorganisms are in a forbidden period or a decay period of a growth curve, and the reaction efficiency is low.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides the flow type sediment-based biochar electrochemical denitrification filter device, improves the efficiency of degrading nitrate in sewage, and is simple to operate. Not only saves the cost of the external carbon source, but also avoids the potential secondary pollution of the sewage.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the invention provides a flow type sediment-based biochar electrochemical denitrification filter device, which comprises a box body with a cover, a denitrification filter bed and an external power supply, wherein the box body is provided with a cover;
the denitrification filter bed comprises a metal filter screen positioned in the box body with the cover and a microorganism enricher arranged on the metal filter screen; the microorganism enricher comprises graphitized foam carbon and bottom sludge-based biochar for enriching denitrifying microorganisms; one end of the external power supply is connected with the metal filter screen, and the other end of the external power supply is connected with the box body with the cover; the box body with the cover is provided with a water inlet and a water outlet.
Further, the graphitized carbon foam forms a hollow polyhedron, and the bottom sludge-based biochar enriched with denitrifying microorganisms is filled in the hollow.
Further, the metal filter screen is attached to the bottom surface of the box body with the cover and connected to the bottom surface of the box body with the cover.
Furthermore, the microorganism enricher can move up and down and is attached to the metal filter screen.
Furthermore, the water inlet is located the bottom of the box body with the cover, the water outlet is higher than the water inlet, sewage flows out through the water outlet in a overflowing mode, and the oxygen-deficient environment of the device in the box body with the cover is guaranteed when the device works.
Preferably, the water outlet is positioned above the side surface of the box body with the cover.
Furthermore, except the reserved part connected with the external power supply, the box body with the cover is coated with an insulating coating, so that the safety of the device during working is improved.
Furthermore, the box body with the cover is detachably connected with the cover.
Further, when the device is operated, sewage flows into the water inlet intermittently by the water pump or the flow rate of the inlet water is kept to be not more than 5m 3/s.
Compared with the prior art, the invention has the following beneficial effects:
the invention is suitable for sewage treatment of low carbon source, provides electrons for denitrification process by using external power supply, has high treatment efficiency, reduces various costs of external carbon source, and avoids potential secondary pollution risk brought by external carbon source to sewage. The device has the advantages of simple manufacturing process, low cost and convenient operation and maintenance.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a flow type sediment-based biochar electrochemical denitrification filter device according to an embodiment of the invention;
FIG. 2 is a schematic view of a partial structure of a microbial concentrator in an embodiment of the present invention;
FIG. 3 is a schematic view of a connection structure between a metal filter and an external power source according to an embodiment of the present invention;
in the figure: 1. a water inlet; 2. a water outlet; 3. a box body with a cover; 4. a cover; 5. a metal screen; 6. a microbial enricher; 7. enriching bottom sludge-based biochar of denitrifying microorganisms; 8. graphitizing the carbon foam.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The technical problem to be solved by the invention is to provide a flow type sediment-based biochar electrochemical denitrification filter bed aiming at the defects of the prior art. The device has the advantages of simple process, good treatment effect, low energy consumption, low manufacturing cost, easy cleaning, storage and maintenance and long service life, and is suitable for the treatment of low-carbon-source sewage.
In order to solve the technical problem, the technical scheme adopted by the invention is as follows:
a flow type sediment-based biochar electrochemical denitrification filter device comprises a water inlet 1, a water outlet 2, a box body 3 with a cover, a denitrification filter bed and an external power supply, wherein the denitrification filter bed comprises a metal filter screen 5 positioned in the box body 3 with the cover and a microorganism enricher 6 placed on the metal filter screen 5; a fixed metal filter screen 5 and a non-fixed microorganism enricher 6 are arranged in the box body 3 with the cover.
The microorganism enricher 6 is composed of graphitized foam carbon 8 and substrate sludge-based biochar 7 for enriching denitrifying microorganisms, the graphitized foam carbon 8 has the conductive capacity, the foam carbon forms a hollow polyhedron, the biochar is filled in the foam carbon, and preferably, the graphitized foam carbon 8 forms a hexahedron, so that the sequencing is convenient and neat.
The water inlet 1 is positioned at the bottom of the box body 3 with the cover, and preferably can be positioned at the right center of the bottom of the box body 3 with the cover. The water outlet 2 is arranged above the device, which is beneficial to keeping the anoxic environment inside the box body 3 with the cover when the device works. The metal filter screen 5 is fixed on the inner bottom surface of the box body 3 with the cover, and is connected with the cathode of an external power supply when the device works.
Example 1
The device during operation requires intermittent type nature sewage to flow, pours into sewage from water inlet 1 intermittent type nature into through plus water pump, utilizes the metal filter screen 5 of fixing at the inside bottom surface of area lid box 3 to filter sewage, removes the large granule material in the sewage, avoids causing the damage to equipment. The metal filter screen 5 is connected with the negative electrode of an external power supply, and the reserved part of the outer side of the box body 3 with the cover is connected with the positive electrode of the external power supply to form a loop and provide electrons for the denitrification of microorganisms.
The microorganism enricher 6 is placed on the metal filter screen 5, when sewage flows in, the microorganism enricher 6 is suspended, the microorganism enricher 6 adsorbs nitrate nitrogen in the sewage, when the sewage flows into the gap, the microorganism enricher 6 falls down to be in contact with the metal filter screen 5, microorganisms in the microorganism enricher 6 obtain electrons on the metal filter screen 5, and the denitrification process is completed. Finally, sewage flows out from the water outlet 2 above the box body 3 with the cover, and the anoxic condition in the box body 3 with the cover is always kept.
Example 2
The microorganism enricher 6 is arranged on a metal filter screen 5, and the sewage is kept to be not more than 5m by a water pump3The water inlet flow speed of the water/s is through the water inlet 1, the water flow in the process can keep the microorganism enricher 6 and the metal filter screen 5 in a always-contacted state, so that the microorganisms in the enricher receive electrons on the filter screen to complete the denitrification process.
The lid 4 of the box body 3 with the lid scribbles insulating coating, and the box body 3 with the lid is outside except that the positive pole department of reserving connection external power source all scribbles insulating coating, has improved the security of device during operation.
Example 3
The flow type sediment-based biochar electrochemical denitrification filter device is suitable for the sewage treatment process of low carbon sources, and an external power supply is used for replacing organic matters to provide electrons for denitrifying microorganisms to complete the denitrification process, so that the cost of the external carbon source is saved, the potential possibility of secondary sewage pollution is avoided, simultaneously, nitrate in sewage can be efficiently degraded, and the device is simple to operate, low in energy consumption and long in service life.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. 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, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (7)
1. A flow type sediment-based biochar electrochemical denitrification filter device is characterized by comprising a box body with a cover, a denitrification filter bed and an external power supply;
the denitrification filter bed comprises a metal filter screen positioned in the box body with the cover and a microorganism enricher placed on the metal filter screen, wherein the metal filter screen is attached to the inner bottom surface of the box body with the cover and connected to the inner bottom surface of the box body with the cover, and the microorganism enricher can move up and down and is attached to the metal filter screen;
the microorganism enricher comprises graphitized foam carbon and bottom sludge-based biochar for enriching denitrifying microorganisms;
one end of the external power supply is connected with the metal filter screen, and the other end of the external power supply is connected with the box body with the cover; the box body with the cover is provided with a water inlet and a water outlet.
2. The flowing type sediment-based biochar electrochemical denitrification filter device as claimed in claim 1, wherein the graphitized carbon foam forms a hollow polyhedron, and the hollow part is filled with the sediment-based biochar enriched with denitrifying microorganisms.
3. The flowing type sediment-based biochar electrochemical denitrification filter device as claimed in claim 1, wherein the water inlet is positioned at the bottom of the box body with the cover, and the water outlet is arranged higher than the water inlet.
4. The flow-type sediment-based biochar electrochemical denitrification filter device as claimed in claim 3, wherein the water outlet is positioned above the side surface of the box body with the cover.
5. The flowing type sediment-based biochar electrochemical denitrification filter device as recited in claim 1, wherein the box body with the cover is coated with an insulating coating except the reserved part for connecting with an external power supply.
6. The flowing type sediment-based biochar electrochemical denitrification filter device as claimed in claim 1, wherein the box body with the cover box body is detachably connected with the cover.
7. The flowing type sediment-based biochar electrochemical denitrification filter device as claimed in any one of claims 1-6, wherein the device is operated in such a way that sewage intermittently flows into the water inlet through the water pump or is kept at a value not greater than 5m3The flow rate of the feed water is/s.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010548657.7A CN111675432B (en) | 2020-06-16 | 2020-06-16 | Flow type sediment-based biochar electrochemical denitrification filter device |
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| CN202010548657.7A CN111675432B (en) | 2020-06-16 | 2020-06-16 | Flow type sediment-based biochar electrochemical denitrification filter device |
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| CN111675432A CN111675432A (en) | 2020-09-18 |
| CN111675432B true CN111675432B (en) | 2021-09-28 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101693578A (en) * | 2009-10-22 | 2010-04-14 | 浙江大学 | Solidoid heterotrophy and electrochemical autotrophy integrated denitrification reactor for removing nitrate out of water |
| CN105858878A (en) * | 2016-04-25 | 2016-08-17 | 东南大学 | Device used for treating sewage containing high-concentration degradation-resistant organic pollutants |
| CN108483637A (en) * | 2018-04-03 | 2018-09-04 | 南通华新环保设备工程有限公司 | A kind of electrode assembly for denitrification filter pool |
| CN109319927A (en) * | 2018-11-02 | 2019-02-12 | 哈尔滨工业大学 | A kind of method and device of electro-chemical systems coupling sulphur autotrophic denitrification |
| CN111252887A (en) * | 2020-02-14 | 2020-06-09 | 北京化工大学 | Biofilm reactor for treating wastewater with low carbon-nitrogen ratio and refractory organic matters |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108947102B (en) * | 2018-06-22 | 2021-02-23 | 南京大学 | Device for deep denitrification and toxicity reduction of sewage and operation method thereof |
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2020
- 2020-06-16 CN CN202010548657.7A patent/CN111675432B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101693578A (en) * | 2009-10-22 | 2010-04-14 | 浙江大学 | Solidoid heterotrophy and electrochemical autotrophy integrated denitrification reactor for removing nitrate out of water |
| CN105858878A (en) * | 2016-04-25 | 2016-08-17 | 东南大学 | Device used for treating sewage containing high-concentration degradation-resistant organic pollutants |
| CN108483637A (en) * | 2018-04-03 | 2018-09-04 | 南通华新环保设备工程有限公司 | A kind of electrode assembly for denitrification filter pool |
| CN109319927A (en) * | 2018-11-02 | 2019-02-12 | 哈尔滨工业大学 | A kind of method and device of electro-chemical systems coupling sulphur autotrophic denitrification |
| CN111252887A (en) * | 2020-02-14 | 2020-06-09 | 北京化工大学 | Biofilm reactor for treating wastewater with low carbon-nitrogen ratio and refractory organic matters |
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| CN111675432A (en) | 2020-09-18 |
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