CN106277324B - Water treatment device for removing total nitrogen - Google Patents
Water treatment device for removing total nitrogen Download PDFInfo
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- CN106277324B CN106277324B CN201610809407.8A CN201610809407A CN106277324B CN 106277324 B CN106277324 B CN 106277324B CN 201610809407 A CN201610809407 A CN 201610809407A CN 106277324 B CN106277324 B CN 106277324B
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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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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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
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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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- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
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Abstract
The utility model provides a get rid of water treatment facilities of total nitrogen, including the denitrogenation biomembrane reaction zone that is located the interior upper portion of equipment main part and the circulating water district that is located the interior lower part of equipment main part, be provided with a plurality of filler diaphragms in the denitrogenation biomembrane reaction zone, the filler diaphragm has the rete and the bottom confined chamber of packing that is formed by the rete, the rete is for having a plurality of microporous porous membranes, be provided with the filler in the chamber of packing, the top of filler diaphragm is provided with into water distributor, raw water pipeline and circulating water pipeline are connected to its water inlet, it connects the filler diaphragm to its a plurality of delivery ports one-to-one, provide the oxygen source to the filler diaphragm in the denitrogenation biomembrane reaction zone, the filler diaphragm supplies the microorganism to adhere to grow in order to form denitrogenation biomembrane, the processing water that rivers obtained after denitrogenation biomembrane denitrogenation gets into the circulating water district, and can return to denitrogenation biomembrane reaction zone through circulating pump and circulating water pipeline of connecting the circulating water district. The water treatment device can simply and effectively remove the total nitrogen.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a water treatment device for removing total nitrogen.
Background
Today, water resources are in short supply, the discharge standard of sewage treatment indexes is continuously improved, which means that the cost of sewage treatment is higher and higher, and the burden of enterprises is increased. Wherein the total nitrogen treatment is the most difficult to treat relative to other indexes of the sewage, such as COD, BOD, total phosphorus and the like, and the traditional biochemical method A is most widely applied in the total nitrogen treatment method at present 2 O, but A 2 O is not a targeted technology, the controllability is poor, COD and BOD reach the standard in a treatment result, but the total nitrogen does not reach the standard, the hydraulic retention time is long, the occupied area of the tank body is large, the operation is unstable, and the like.
Disclosure of Invention
The invention mainly aims to overcome the defects of the prior art and provide a water treatment device capable of simply and effectively removing total nitrogen.
In order to achieve the purpose, the invention adopts the following technical scheme:
a water treatment device for removing total nitrogen comprises a device main body, a denitrification biological film reaction area positioned on the upper part in the device main body and a circulating water area positioned on the lower part in the device main body, wherein a plurality of filler membranes are arranged in the denitrification biological film reaction area, each filler membrane is provided with a membrane layer and a filler cavity formed by the membrane layer and closed at the bottom end, the membrane layers are porous membranes with a plurality of micropores, fillers are arranged in the filler cavities, a water inlet distributor is arranged above the filler membranes, a raw water pipeline and a circulating water pipeline are connected with a water inlet of the water inlet distributor, a plurality of water outlets are formed in the water inlet distributor, the filler membranes are respectively connected with the water outlets in a one-to-one correspondence manner, an oxygen source is provided to the filler membranes in the denitrification biological film reaction area, the filler membranes are used for the attachment growth of microorganisms to form denitrification biological films, and treated water obtained after denitrification of water passes through the denitrification biological films enters the circulating water area and can be returned to the denitrification biological film reaction area through a circulating pump connected with the circulating water area and the circulating water pipeline.
Further:
the packing diaphragm is a plate-type packing diaphragm with two oppositely arranged film layers, and the packing cavity is formed between the two film layers.
The filler membrane is fixed by the supporting layers above and below the filler membrane.
The bearing layer is in a grid form.
The equipment main body is provided with a plurality of air windows on the wall corresponding to the denitrification biological film reaction area, preferably, the air windows are a plurality of air windows symmetrically arranged on the two side walls of the equipment main body, and the negative pressure generated when the water flow flowing out of the water inlet distributor passes through the filler membrane promotes the air to flow from the air windows to the filler membrane.
The water inlet and distributor is of a tree structure with a plurality of branch pipes formed on a main pipe, water outlets of the branch pipes are respectively connected with the packing membranes in a one-to-one correspondence mode, and the packing membranes and the branch pipes are uniformly distributed in the horizontal direction.
The water treatment device also comprises a water outlet distributor, the denitrification biological film reaction zone is provided with a bottom which isolates the denitrification biological film reaction zone from the circulating water zone, the water outlet distributor penetrates through the bottom, the water inlet of the water outlet distributor is higher than the bottom by a set distance, and the water outlet of the water outlet distributor is positioned in the circulating water zone.
The bottom is provided with a sludge discharge pipe.
The circulating water area is provided with a circulating water tank, and the upper part of the circulating water tank is provided with a water outlet pipe for discharging water to a specified position.
The water treatment device further comprises a liquid level meter for detecting the liquid level to control the starting of the circulating pump.
The film layer of the filler film is a porous film with set permeability.
The invention has the beneficial effects that:
in the invention, a plurality of water outlets are formed on the water inlet distributor, each water outlet is respectively connected with a plurality of filler membranes in a one-to-one correspondence manner, each filler membrane is provided with a membrane layer and a filler cavity formed by the membrane layer and with a closed bottom end, the membrane layer is a porous membrane with a plurality of micropores, fillers are arranged in the filler cavity, the filler membranes extend downwards, water to be treated flowing into the filler membranes from the water inlet distributor is outwards penetrated out through the micropores of the membrane layer, so that microorganisms can be attached to and grow on the surface of the filler membranes to form a denitrification biological membrane, and treated water obtained after denitrification through the denitrification biological membrane enters a circulating water area and can be returned to a denitrification biological membrane reaction area through a circulating pump and a circulating water pipeline which are connected with the circulating water area. The water treatment device has the advantages of good effect of removing total nitrogen, high efficiency, simple and convenient control and simplified equipment structure.
The treated object (raw water) can be first-stage materialized effluent, and the total nitrogen of the effluent can be ensured to reach the discharge standard after the treatment by the equipment. The device has the advantages that the retention time is only 30 minutes, the effect of removing the total nitrogen can reach the effect of 24 hours of the retention time in the traditional biochemical mode, the volume of the device is small, the installation is simple and convenient, the maintenance is easy, and the unattended automatic operation can be realized.
The preferred solution also achieves further advantages. For example, the main body has louvers on the wall corresponding to the denitrification biofilm reaction zone, more preferably, the louvers are a plurality of louvers symmetrically formed on two side walls of the main body, and negative pressure generated when water flowing out of the water inlet distributor passes through the packing membrane causes micro-flow of air from the louvers to the packing membrane. Through the design of the oxygen source, the transom window can automatically supply the oxygen source for the rapid growth and reproduction of microorganisms without a blower or other power oxygen supply, the equipment structure is further simplified, and the cost is reduced. If again, the water inlet distributor is for being formed with the tree structure of a plurality of branch pipes on being responsible for, the delivery port of a plurality of branch pipes is connected respectively one-to-one the filler diaphragm, a plurality of filler diaphragms with a plurality of branch pipes are along horizontal direction evenly distributed, and this kind of structural configuration lets rivers homodisperse pass each filler diaphragm, with the air current intensive mixing that flows to the diaphragm to diaphragm frictional resistance is bigger to rivers influence, can further promote the treatment effect of desorption total nitrogen. If the water treatment device also comprises a water outlet distributor, the denitrification biomembrane reaction zone is provided with a bottom which isolates the denitrification biomembrane reaction zone from the circulating water zone, the water outlet distributor runs through the bottom and is arranged, the water inlet of the water outlet distributor is higher than the set distance at the bottom, the water outlet of the water outlet distributor is positioned at the circulating water zone, water passing through the denitrification biomembrane enters the circulating water zone through the water outlet distributor, and the bottom is more preferably provided with a sludge discharge pipe. Through the design, the sludge components and the aged and fallen denitrification biological film are deposited at the bottom of the biological film reaction zone and cannot enter the circulating water zone, and can be periodically discharged to a designated position through the sludge discharge pipe, and the supernatant is discharged to the lower circulating water zone through the water outlet distributor.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.
Referring to fig. 1, in one embodiment, a water treatment apparatus for removing total nitrogen includes an apparatus main body 1, a denitrification biofilm reaction zone 3 located at an upper portion of the apparatus main body, and a circulating water zone 5 located at a lower portion of the apparatus main body, a plurality of filler membranes 7 are disposed in the denitrification biofilm reaction zone 3, the filler membranes 7 have a membrane layer and a filler cavity formed by the membrane layer and having a closed bottom end, the membrane layer is a porous membrane having a plurality of micropores, a filler is disposed in the filler cavity, a water inlet distributor 8 is disposed above the filler membranes 7, a water inlet of the water inlet distributor 8 is connected to a raw water pipeline 9 and a circulating water pipeline 10, a plurality of water outlets are formed in the water inlet distributor 8, the water outlets are respectively connected to the filler membranes 7 in a one-to-one correspondence manner, the filler membranes 7 extend upward to a lower side, preferably to a position close to the circulating water zone 5, an oxygen source is provided to the filler membranes 7 in the denitrification biofilm reaction zone 3, the filler membranes 7 allow microorganisms to grow to form a denitrification biofilm 13, and treated water enters the circulating water 5 through the denitrification biofilm 13 and is connected to the circulating water zone 3 and the circulating water circulation pump 10.
In a preferred embodiment, the packing membrane 7 is a plate-type packing membrane having two oppositely disposed membrane layers, with the packing cavity formed between the two membrane layers.
In the preferred embodiment, the filler membrane 7 is held by the support layers above and below it. Preferably, the support layer is in the form of a grid.
In a preferred embodiment, the main body of the apparatus is provided with a plurality of louvers 6 on the wall corresponding to the denitrification biofilm reaction zone 3, preferably, the louvers 6 are a plurality of louvers 6 symmetrically provided on two side walls of the main body of the apparatus, and the negative pressure generated when the water flow from the water inlet distributor 8 passes through the packing membrane 7 causes the air to flow from the louvers 6 to the packing membrane 7. In a preferred embodiment, the louvers may be formed as louvers to prevent water from splashing out of the apparatus.
In a preferred embodiment, the water inlet distributor 8 is a tree structure with a plurality of branch pipes 11 formed on a main pipe, the water outlets of the plurality of branch pipes 11 are respectively connected with the packing membranes 7 in a one-to-one correspondence manner, and the plurality of packing membranes 7 and the plurality of branch pipes 11 are uniformly distributed along a horizontal direction.
In a preferred embodiment, the water treatment apparatus further comprises a water outlet distributor 14, the denitrification biomembrane reaction zone 3 has a bottom 15 for separating the denitrification biomembrane reaction zone 3 from the circulating water zone 5, so that the denitrification biomembrane reaction zone 3 forms a container type structure at the bottom 15, the water outlet distributor 14 is arranged through the bottom 15, the water inlet of the water outlet distributor 14 is higher than the bottom 15 by a set distance, and the water outlet of the water outlet distributor 14 is positioned at the circulating water zone 5.
More preferably, said bottom 15 is provided with a sludge discharge pipe 16.
Preferably, the water outlet distributor 14 includes a main water outlet pipe extending downward in the circulating water region 5, and a plurality of water outlets are distributed on the main water outlet pipe along the length direction, more preferably, at even intervals.
The circulating water area is provided with a circulating water tank, and the upper part of the circulating water tank is provided with a water outlet pipe 19 for discharging water to a specified position.
In the preferred embodiment, a level gauge 17 is also included for detecting the liquid level to control the activation of the circulation pump 18.
The filler in the filler membrane 7 is porous sponge filler.
The device body and the bearing layer can be made of PVC materials. The circulating water tank can adopt PP material.
The features and principles of specific embodiments of the present invention are further described below in conjunction with the following figures.
The invention provides a novel energy-saving water treatment device by utilizing the principles of degrading organic matters by a biological membrane and removing total nitrogen by nitrification and denitrification. The schematic structural diagram of the device is shown in figure 1, the equipment can be in a rectangular tower type, and the treatment capacity of single equipment is 1-5 m 3 The main body 1 is made of high-quality light PVC material according to the total nitrogen load, the middle of the top of the equipment is provided with an access hole 2, a top cover is arranged, and the upper part and the lower part of the internal part of the equipment are divided into an upper part and a lower partThe upper part is a denitrification biomembrane reaction zone 3 which is fixed by an upper bearing layer 4 and a lower bearing layer 4, the bearing layer can be made into a grid form by PVC materials, the lower part is a circulating water zone 5 which can adopt a circulating water tank made of PP plates. Four symmetrical air windows 6 are arranged on two side walls of the shell of the denitrification biomembrane reaction zone, so that an air source for rapid growth and reproduction of microorganisms can be provided, and an air blower or other power for oxygen supply is not needed. A plurality of packing diaphragms 7 which are equidistantly spaced are arranged in the biomembrane reaction zone, the packing diaphragms 7 can be made of non-woven fabrics made of environment-friendly materials, a water inlet distributor 8 is arranged above a supporting layer at the upper part of the packing diaphragms 7, the water inlet end of the water inlet distributor is arranged in a three-way form, one end of the water inlet distributor is connected with raw water 9, and the other end of the water inlet distributor is connected with circulating water 10. The water inlet distributor 8 is provided with branch pipes 11 which are uniformly distributed, and the branch pipes 11 which are in one-to-one correspondence with the packing membranes 7 enable water flow to uniformly disperse and pass through each packing membrane 7 and to be outwards penetrated out from micropores of the packing membranes 7. The sponge filler 12 with multiple pore diameters is filled in each filler diaphragm 7, the specific surface area of the sponge filler 12 is large, and anaerobic microorganisms propagate in the filler diaphragms in an anaerobic environment through a culture means. And outside the filler diaphragm, under the facultative aerobic environment, through the means of culture, the outer surface of diaphragm can produce denitrified biofilm 13 gradually, sewage is abundant to contact with anaerobic microorganisms, permeates the denitrified biofilm again, has accomplished the process of denitrogenation. The denitrified treated water flows into the bottom of the biomembrane reaction zone, and sludge 15 deposited at the bottom is discharged to a designated position through a sludge discharge pipe 16. The supernatant liquid passes through the water outlet distributor 14 to the circulating water area 5. The circulating water tank is provided with a liquid level meter 17, the bottom water outlet is provided with a circulating pump 18, the circulating pump 18 circulates the outlet water to the biomembrane reaction zone, and the upper part of the circulating water tank is connected with an outlet pipe 19 so as to discharge the water to a specified position.
The treatment process flow and the principle of the water treatment equipment for removing the total nitrogen are as follows:
the treated high total nitrogen sewage is first treated with one stage of sewage treating process, which may be grating, coagulating deposition or air floating, and through feeding raw water to be treated into the apparatus of the present invention with water inlet pump, connecting the water inlet pipe to the main pipe of the water inlet distributor, setting several small branch pipes in the main pipe in the horizontal direction in the same distance between the main pipe and the two stuffing films below the main pipeThe distance between the centers of the sheets is equal. Each branch pipe is connected with the corresponding packing membrane one by one in the vertical direction, so that the inlet water uniformly enters the packing. Then, when water flows through the packing membrane, a certain negative pressure is formed around the air windows, and the negative pressure generates a plurality of air micro-flows to enter from the air windows with two symmetrical ends. These air microflows are sufficient to create a facultative aerobic environment on the outer surface of the packing membrane that provides for the growth of denitrification microorganisms. The even inflow of branch pipe is followed to the tiny rivers of stranded, fully contacts with the inside porous diameter sponge filler of filler diaphragm, and under anaerobic environment, porous sponge filler cultivates the domestication back through special means, and its inside can produce a large amount of anaerobes, and this kind of anaerobe can be hydrolyzed into the micro molecule organic matter with the macromolecule organic matter in the sewage, and organic nitrogen in the total nitrogen can be converted into ammonia nitrogen, produces the ammoniation reaction. The filler membrane is made of a material with poor hydrophilicity and multiple micropores, the friction resistance is large, the adsorption capacity is strong, small-particle organic suspended matters in sewage can be continuously attached to the membrane, microorganisms can rapidly propagate in a facultative aerobic environment, after cultivation, a layer of denitrification biological membrane can be gradually attached to the membrane, the denitrification biological membrane can be generated only by 10-15 days from low load to high load starting time, the mature biological membrane mainly comprises anaerobic bacteria, anoxic bacteria and aerobic bacteria which are attached from inside to outside, and the thickness of the biological membrane can reach 3MM. The sewage after the anaerobic reaction penetrates through the biological membrane from inside to outside of the filler membrane, and is subjected to anoxic and aerobic reactions of the denitrification biological membrane after the ammoniation reaction of anaerobic bacteria. Under the action of circulating water in the circulating water area, the whole reaction cycle of nitrification and denitrification is formed, the energy is provided by utilizing the carbon source in the sewage, and the total nitrogen is quickly digested and converted into N 2 、N 2 O and NO, and along with the consumption of carbon source, COD can also be greatly reduced, the sewage treated by the denitrification biomembrane freely falls to the bottom of the biomembrane reaction zone, the denitrification biomembrane can be updated and metabolized along with the treatment degree, the aged biomembrane can fall off, the sediment is deposited at the bottom of the biomembrane reaction zone and is periodically discharged to a designated position by a sludge discharge pipe, the supernatant is discharged to a circulating water zone at the lower part by a water outlet water distributor, a water outlet pipe is arranged below the circulating water zone and is provided for circulation according to the signal of a liquid level meterAnd the circular pump circulates to a main pipeline of a water inlet distributor at the top of the equipment, and the circulating water quantity is 400 percent. Finally, the treated water is discharged to a lower stage treatment unit through a water pipe at the upper part of the circulating water area.
The equipment of the embodiment of the invention only needs 30 minutes of residence time, can achieve the effect of removing total nitrogen by the residence time of 24 hours in the traditional biochemical mode, has small volume, simple and convenient installation and easy maintenance, and can realize unattended automatic operation.
Examples of the invention
Taking raw water from a river directly, wherein the treatment capacity is 200t/d, and according to data of operating for one month, main indexes of the raw water are as follows: COD 192-264 mg/L, NH 3-N26.4-29.1TN 38.7-44m.2g/L.
The treatment process comprises the following steps:
the water inlet, the grid, the regulating tank, the total nitrogen treatment equipment, the aerobic tank and the wastewater are discharged after reaching standards.
The total nitrogen treatment equipment uses the water treatment device for removing total nitrogen, the integral size of a single equipment is 1.2m multiplied by 3m, the treatment capacity of the single equipment is 100t/d, the two equipments are operated in parallel, and the biomembrane reaction zone of the single equipment is 3m 3 1.2m in the circulating water zone 3 . The top end of the device is a 600mm square inspection opening provided with a cover plate. The inlet water is uniformly distributed into 60 denitrification membranes below the uppermost water distributor, a circulating water area is arranged below the membranes, a liquid level switch is arranged, the starting of a circulating pump is automatically controlled, and the circulating water amount is 20m 3 And h, an overflow port arranged at the upper part of the circulating water area is connected to the aerobic pool treatment unit.
After half a month of cultivation and domestication of the denitrifying microorganisms, a high-efficiency denitrifying biomembrane is gradually formed, and sewage permeates the denitrifying biomembrane to achieve the purpose of degrading organic pollutants and total nitrogen.
The COD of the treated effluent is 70-120, the NH3-N is 2.1-4.4, the TN is 4.3-4.7 mg/L, and the TN index reaches below the first grade A standard of the sewage comprehensive discharge standard. The TN removal rate reaches 88.9%, and the COD removal rate also reaches 63.5%, so that the load of the next process unit is reduced, and the standard discharge of each index is ensured.
The foregoing is a more detailed description of the invention in connection with specific/preferred embodiments and is not intended to limit the practice of the invention to those descriptions. It will be apparent to those skilled in the art that various substitutions and modifications can be made to the described embodiments without departing from the spirit of the invention, and these substitutions and modifications should be considered to fall within the scope of the invention.
Claims (10)
1. A water treatment device for removing total nitrogen is characterized by comprising a device main body, a denitrification biomembrane reaction zone which is positioned at the upper part in the device main body and is provided with an air flowing space, and a circulating water zone which is positioned at the lower part in the device main body, wherein a plurality of filler membranes are arranged in the denitrification biomembrane reaction zone, each filler membrane is provided with a membrane layer and a filler cavity which is formed by the membrane layer and is closed at the bottom end, the membrane layer is a porous membrane with a plurality of micropores, fillers are arranged in the filler cavity, a water inlet distributor is arranged above the filler membranes, a raw water pipeline and a circulating water pipeline are connected with a water inlet of the water inlet distributor, a plurality of water outlets are formed on the water inlet distributor, the water outlets are respectively connected with the filler membranes in a one-to-one correspondence manner, and the filler membranes extend downwards, the denitrification biomembrane reaction zone is internally provided with an oxygen source to the filler membrane, the equipment main body is provided with an air window on the wall corresponding to the denitrification biomembrane reaction zone, an air flowing space is formed between the wall of the equipment main body and the filler membrane, the negative pressure generated when the water flowing out of the water inlet distributor passes through the filler membrane promotes the air to flow from the air window to the filler membrane, the air window automatically supplies the oxygen source for the rapid growth and reproduction of microorganisms, the filler membrane is used for the attachment growth of the microorganisms to form a denitrification biomembrane, and the water flow enters the circulating water zone through the treated water obtained after the denitrification of the denitrification biomembrane and can be returned to the denitrification biomembrane reaction zone through a circulating pump connected with the circulating water zone and the circulating water pipeline.
2. The water-treating device for removing total nitrogen of claim 1, wherein said filler membrane is a plate-type filler membrane having two oppositely disposed membrane layers, said filler cavity being formed between said two membrane layers.
3. The water-treating device for removing total nitrogen of claim 1, wherein said filler membrane is fixed by supporting layers above and below it.
4. The water-treating device for removing total nitrogen as claimed in claim 1, wherein said louver is a plurality of louvers symmetrically opened on both side walls of said equipment main body.
5. The water treatment device for removing total nitrogen according to any one of claims 1 to 4, wherein the water inlet distributor is a tree structure having a main pipe formed with a plurality of branch pipes, the water outlets of the plurality of branch pipes are respectively connected to the packing membranes in a one-to-one correspondence manner, and the plurality of packing membranes and the plurality of branch pipes are uniformly distributed along a horizontal direction.
6. The water treatment apparatus for removing total nitrogen according to any one of claims 1 to 4, further comprising a water outlet distributor, wherein the denitrification biofilm reaction zone has a bottom that separates the denitrification biofilm reaction zone from the circulating water zone, the water outlet distributor is disposed through the bottom, the water inlet of the water outlet distributor is higher than the bottom by a set distance, and the water outlet of the water outlet distributor is located in the circulating water zone.
7. The water-treating device for removing total nitrogen according to claim 6, wherein said bottom portion is provided with a sludge discharge pipe.
8. The water-treating device for removing total nitrogen as claimed in any one of claims 1 to 4, wherein said circulating water zone has a circulating water tank provided at an upper portion thereof with a water outlet pipe for discharging water to a designated position.
9. The water-treating device for removing total nitrogen according to any one of claims 1 to 4, further comprising a liquid level meter for detecting a liquid level to control activation of said circulation pump.
10. The water-treating device for removing total nitrogen according to any one of claims 1 to 4, wherein said packing is a porous sponge packing.
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| CN110697894B (en) * | 2019-10-10 | 2021-03-19 | 苏州淡林环境科技有限公司 | AO total nitrogen removal device and total nitrogen removal process |
| CN110950433A (en) * | 2019-11-18 | 2020-04-03 | 深圳市慧创源环保科技有限公司 | Sewage treatment device |
| CN110950432A (en) * | 2019-11-18 | 2020-04-03 | 深圳市慧创源环保科技有限公司 | Sewage treatment device |
| CN113754052A (en) * | 2021-02-09 | 2021-12-07 | 清华大学 | Water treatment device and method |
| CN113860657A (en) * | 2021-10-29 | 2021-12-31 | 清华大学 | Water treatment system and method suitable for distributed users |
| CN113860656A (en) * | 2021-10-29 | 2021-12-31 | 清华大学 | Water treatment device and method suitable for distributed users |
| CN115340195A (en) * | 2022-08-30 | 2022-11-15 | 林佳业 | Self-circulation biomembrane denitrogenation sewage treatment device |
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| CN102557255A (en) * | 2012-01-05 | 2012-07-11 | 中山大学 | Biological membrane-activated sludge composite membrane bioreactor for denitrification and water treatment method using same |
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