CN114873712B - Anoxic tank and sewage treatment system comprising anoxic tank - Google Patents
Anoxic tank and sewage treatment system comprising anoxic tank Download PDFInfo
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- CN114873712B CN114873712B CN202210429406.6A CN202210429406A CN114873712B CN 114873712 B CN114873712 B CN 114873712B CN 202210429406 A CN202210429406 A CN 202210429406A CN 114873712 B CN114873712 B CN 114873712B
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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
- C02F3/006—Regulation methods for biological 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
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/043—Treatment of partial or bypass streams
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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
- C02F2303/00—Specific treatment goals
- C02F2303/02—Odour removal or prevention of malodour
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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
Abstract
The invention relates to an anoxic tank and a sewage treatment system comprising the same, comprising the anoxic tank and a waterwheel driving biological rotating disc communicated with the anoxic tank through a lifting drain pipe, wherein the anoxic tank is provided with a water inlet pipe and a lifting drain pipe on the tank body, a partition plate is arranged in the middle of the tank body, the partition plate divides the tank body into an upper regulating tank and a lower anoxic treatment tank, one end of the partition plate is provided with a water channel communicated with the regulating tank and the anoxic treatment tank, the water inlet pipe is arranged on the upper part of the regulating tank, one end of the bottom of the anoxic treatment tank, which is far away from the water channel, is provided with a pump pit, and a water suction pump is arranged in the pump pit, and the lifting drain pipe is communicated with the water suction pump. The invention has small occupied area, simple and convenient operation, less power equipment, low energy consumption and high sewage treatment efficiency, can still ensure the stable operation of the equipment under the condition of small sewage treatment volume by the multi-point backflow arrangement, and is suitable for the treatment of rural domestic sewage.
Description
Technical Field
The invention belongs to the field of sewage treatment, and particularly relates to an anoxic tank and a sewage treatment system comprising the anoxic tank.
Background
Rural domestic sewage is distributed and scattered, and villages or aggregation are mostly used as basic units for scattered treatment. The existing treatment equipment applied to rural domestic sewage still uses an anaerobic-anoxic-aerobic activated sludge biological treatment mode in urban sewage treatment, and is obtained by proportionally shrinking the urban domestic sewage treatment equipment, but because the total water amount of rural village domestic sewage is small, even if the equipment is reduced in an equal proportion, the continuous operation of an activated sludge treatment process is difficult to maintain, so that the anoxic denitrification deodorization operation is unstable, the problems of large equipment occupation area, complex construction, more power equipment, high energy consumption, complex maintenance and the like still exist, and in addition, the problems of high treatment energy consumption, easy collapse of a sludge system and the like are also necessarily caused by the small concentration of pollutants in rural sewage still adopting the anaerobic-anoxic-aerobic activated sludge biological treatment mode of the urban sewage.
Therefore, it is important to develop an anoxic tank based on a biomembrane method and a sewage treatment system comprising the anoxic tank, so that rural sewage can be treated efficiently, stably and with low consumption.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides an anoxic tank and a sewage treatment system comprising the anoxic tank, which have the advantages of small occupied area, simple and convenient operation, high sewage treatment efficiency, capability of still ensuring the stable operation of equipment under the condition of small sewage treatment volume and suitability for the treatment of rural domestic sewage. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the utility model provides an anoxic tank, includes the cell body, be provided with inlet tube and promotion drain pipe on the cell body, set up in the baffle at cell body middle part, the baffle will the cell body is separated into the equalizing basin on upper portion and the anoxic treatment pond of lower part, the intercommunication has been seted up to the one end of baffle the water channel in equalizing basin and anoxic treatment pond, the inlet tube set up in the upper portion of equalizing basin, the bottom of anoxic treatment pond is kept away from the one end of water channel is provided with the pump pit, be provided with the suction pump in the pump pit, promote the drain pipe with the suction pump is linked together.
Further, the baffle is obliquely arranged, one end close to the water passing channel is low, and one end far away from the water passing channel is high.
Further, the partition board adopts a flexible diaphragm.
Further, the regulating tank is provided with a liquid level controller, the liquid level controller is used for controlling the start and stop of the water pump, when the water level of the regulating tank is higher than the set highest water level, the liquid level controller controls the start of the water pump, and when the water level of the regulating tank is lower than the set lowest water level line, the liquid level controller controls the water pump to be closed.
Further, the tank body is a closed tank body, and a manhole is arranged on the top wall of the tank body.
Further, a plurality of frame fillers are arranged in the anoxic treatment tank, and the frame fillers are formed by sequentially inserting a plurality of frame filler units from bottom to top.
Still further, the frame packing unit includes the support and set up in felt on the support, the lower part of support is provided with a plurality of posts, the top of support is provided with a plurality of intubates, and the post of upper square frame packing unit inserts and locates in the corresponding intubate of adjacent lower square frame packing unit.
The sewage treatment system of the anoxic tank comprises the anoxic tank, and a waterwheel driving biological rotating disc communicated with a lifting drain pipe of the anoxic tank, wherein the waterwheel driving biological rotating disc comprises a sewage water inlet, a driving water outlet and 2 purified water outlets, and the lifting drain pipe is respectively communicated with the sewage water inlet and the driving water inlet through corresponding branch pipes.
Further, a driving water return pipe is arranged on the pump pit, and the other end of the driving water return pipe is communicated with a driving water outlet of the biological rotating disc driven by the waterwheel.
Still further, still be provided with the purified water wet return on the anoxic treatment pond, the entrance point of purified water wet return with 1 purified water outlet of waterwheel drive biological carousel is linked together, the exit end of purified water wet return set up in the upper portion of anoxic treatment pond, and be located under the water channel or with the water channel flushes.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention simplifies the traditional anaerobic-anoxic-aerobic activated sludge biological treatment mode into the treatment mode of an anoxic tank-waterwheel driven biological rotating disc by utilizing the characteristics of small water volume scale and low pollutant concentration of rural domestic sewage, adopts the biological membrane treatment principle in the anoxic tank and the waterwheel driven biological rotating disc, adopts the waterwheel driven biological rotating disc with better oxygenation efficiency to replace the traditional aerobic tank, can efficiently remove organic pollutants and ammonia nitrogen in the sewage, can achieve excellent treatment effect for the rural domestic sewage even if an anaerobic treatment link is not arranged any more, simplifies the equipment construction cost and improves the utilization rate of equipment.
2. Because the rural domestic sewage water quantity scale is small, the water quantity fluctuation is large, therefore, after the anaerobic treatment link is omitted, an independent regulating tank is needed to be arranged, or the anaerobic tank is used for bearing the huge fluctuation of the flow, however, the simple increase of the regulating tank can enlarge the occupied area of the equipment, and the huge fluctuation of the flow is borne by the anaerobic tank, so that the stay time of sewage in the anaerobic tank is changed continuously, the efficiency of anoxic denitrification deodorization is difficult to ensure, in addition, the water level of the anaerobic tank is changed, the filler is exposed to the air, the adverse effect is caused on anoxic denitrification microorganisms, in order to solve the problem, the invention is provided with the water suction pump, the sewage in the anaerobic tank is driven by the water suction pump to flow upwards to the waterwheel in a countercurrent way, and the baffle plate is arranged in the tank body, and the regulating tank is separated from the upper part of the anoxic tank, thus, the structure of vertical arrangement and common bottom construction can be formed, and the sewage treatment system is adapted to the change of the domestic sewage flow only by controlling the start and the stop of the water suction pump according to the water level condition of the regulating tank, the water level change in the anaerobic tank can not produce the stable denitrification environment of the anoxic tank, and the anoxic zone of the anoxic denitrification can be guaranteed.
3. Because the driving water of the waterwheel driving biological rotating disc is not treated by the waterwheel driving biological rotating disc, and the pollutants are not treated, the driving water is returned to the water outlet end pump pit of the anoxic treatment tank, and the water is again referred to for lifting, draining and purifying; the purified water nitrified by the biological rotating disc driven by the waterwheel contains high-concentration nitrate, so that the purified water flows back to the water inlet end of the sampling treatment area and is subjected to denitrification deodorization reaction in the anoxic treatment tank, and the sewage treatment effect is greatly improved; the multi-point backflow design of the anoxic tank can enable different water qualities to flow back independently and not interfere with each other, solves the contradiction that the driving water of the waterwheel driving biological rotating disc is different from the water quality of the purified water and cannot flow back to the same position of the anoxic treatment tank, better ensures anoxic denitrification and deodorization conditions of the anoxic treatment tank, and ensures stable realization of anoxic denitrification and deodorization functions.
4. According to the invention, the driving water of the biological rotating disc driven by the waterwheel and the sewage treatment water are lifted by the same lifting pump, so that the number of the lifting pumps is saved.
The invention has small occupied area, simple and convenient operation, is suitable for rural domestic sewage treatment with small water volume scale and low pollutant concentration, has less power equipment and low energy consumption, can still stably run under the condition of small sewage treatment volume, and ensures the independence and stability of anoxic denitrification deodorization treatment.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a frame packing unit according to one embodiment of the present invention;
in the figure: 1. anoxic tank, 2, tank body, 3, water inlet pipe, 4, lifting drain pipe, 5, baffle, 6, equalizing tank, 7, anoxic treatment tank, 8, water channel, 9, pump pit, 10, water pump, 11, liquid level controller, 12, manhole, 13, frame packing, 14, bracket, 15, felt, 16, convex column, 17, cannula, 18, waterwheel driving biological rotating disc, 19, sewage water inlet, 20, driving water inlet, 21, driving water outlet, 22, purified water outlet, 23, driving water return pipe, 24, purified water return pipe.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The present invention will be described in further detail with reference to the accompanying drawings.
An embodiment of a sewage treatment system of the present invention as shown in fig. 1-2 includes an anoxic tank 1, a waterwheel driving biological rotating disc 18 communicating with the anoxic tank 1 through a lift drain pipe 4; the anoxic tank 1 comprises a tank body 2, a water inlet pipe 3 and a lifting drain pipe 4 which are arranged on the tank body 2, a partition board 5 which is arranged in the middle of the tank body 2, the partition board 5 divides the tank body 2 into an upper regulating tank 6 and a lower anoxic treatment tank 7, one end of the partition board 5 is provided with a water channel 8 which is communicated with the regulating tank 6 and the anoxic treatment tank 7, the water inlet pipe 3 is arranged on the upper part of the regulating tank 6, one end of the bottom of the anoxic treatment tank 7, which is far away from the water channel 8, is provided with a pump pit 9, a water pump 10 is arranged in the pump pit 9, the waterwheel driving biological turntable 18 comprises a sewage water inlet 19, a driving water inlet 20, a driving water outlet 21 and 2 purified water outlets 22, and one end of the lifting drain pipe 4 is communicated with the water pump 10; the other end of the lifting drain pipe 4 is respectively communicated with the sewage water inlet 19 and the driving water inlet 20 through corresponding branch pipes. According to the invention, the regulating tank 6 and the anoxic treatment tank 7 are vertically arranged, and are constructed at the same bottom, so that the construction cost is reduced, and the occupied area is saved; the baffle 5 can effectively ensure the anoxic denitrification deodorization condition of the anoxic zone and prevent the anoxic denitrification deodorization condition from being influenced by the disturbance of the fluctuation of the water level of the regulating tank 6. The waterwheel-driven biological rotating disc 18 adopted by the invention is commercial equipment, belongs to the prior art, and the specific structure and the working principle thereof are not repeated here.
As an embodiment of the sewage treatment system of the present invention, the pump pit 9 is provided with a driving water return pipe 23, and the other end of the driving water return pipe 23 is communicated with a driving water outlet 21 of the driving biological rotating disk 18 of the waterwheel. Because the driving water of the waterwheel driving biological rotating disc 18 is not treated by the waterwheel driving biological rotating disc 18, and the pollutants are not treated effectively, the invention returns the driving water to the water outlet end pump pit 9 of the anoxic treatment tank 7, and the driving water is again referred to the lifting drainage and purification.
As an embodiment of the sewage treatment system of the present invention, the anoxic treatment tank 7 is further provided with a purified water return pipe 24, an inlet end of the purified water return pipe 24 is communicated with 1 purified water outlet 22 of the waterwheel-driven biological rotating disc 18, and an outlet end of the purified water return pipe 24 is disposed at an upper portion of the anoxic treatment tank 7 and is located directly below the water passing channel 8 or flush with the water passing channel 8. The purified water nitrified by the biological rotating disc driven by the waterwheel contains nitrate, so that the purified water is returned to the water inlet end of the sampling treatment area to participate in denitrification deodorization reaction in the anoxic treatment tank 7, and the sewage treatment effect is greatly improved. The multipoint reflux design of the anoxic tank 1 can lead different water qualities to independently reflux and not interfere with each other, solves the contradiction that the driving water of the waterwheel driving biological rotating disc 18 is different from the water quality of the purified water and cannot reflux to the same position of the anoxic treatment tank 7, better ensures the anoxic denitrification and deodorization conditions of the anoxic treatment tank 7, and ensures the stable realization of the anoxic denitrification deodorization function.
As an embodiment of the sewage treatment system of the present invention, the partition plate 5 is disposed obliquely, and one end close to the water passing passage 8 is low, and one end far from the water passing passage 8 is high. The baffle 5 is obliquely arranged, so that sewage sediment of the regulating tank 6 can flow into the anoxic treatment tank 7 at the lower part, the large-area sediment of accumulated mud on the baffle 5 is prevented and treated, and meanwhile, the accumulated mud is conveniently removed.
As one embodiment of the sewage treatment system, the partition board 5 adopts a flexible diaphragm, so that the cost is low, the installation and the disassembly are convenient, the shape of the construction space is not limited, and the partition board is convenient to store in a limited space when the partition board is removed for maintenance.
As an embodiment of the sewage treatment system, the tank body 2 is a closed tank body 2, and a manhole 12 is arranged on the top wall of the tank body 2 and can be used as a channel for overhauling and dredging to realize normal operation and maintenance.
As an embodiment of the sewage treatment system of the present invention, the adjusting tank 6 is provided with a liquid level controller 11, the liquid level controller 11 is used for controlling the start and stop of the water pump 10, when the water level of the adjusting tank 6 is higher than the set highest water level, the liquid level controller 11 controls the start of the water pump 10, and when the water level of the adjusting tank 6 is lower than the set lowest water level line, the liquid level controller 11 controls the water pump 10 to be turned off. The liquid level controller 11 can control the start and stop of the water pump 10 according to the water level condition, so that the sewage treatment system can adapt to the fluctuation of the domestic sewage flow of villages.
Further, the liquid level controller 11 is an automatic controller of a float water level switch. The automatic controller of the float water level switch is a commercially available part, and the specific working principle and structure are not repeated here, in addition, the liquid level controller 11 can also adopt other liquid level identification and control devices such as a liquid level meter, and only needs to achieve the function of liquid level identification, and can control the start and stop of the water pump 10 according to the set liquid level limit value.
As an embodiment of the sewage treatment system, a plurality of frame fillers 13 are arranged in the anoxic treatment tank 7, and the frame fillers 13 are formed by sequentially inserting a plurality of frame filler units from bottom to top.
Further, the frame stuffing unit comprises a bracket 14 and a felt 15 arranged on the bracket 14, wherein the felt 15 is used for mounting a biological film; the lower part of the support 14 is provided with a plurality of convex columns 16, the top of the support 14 is provided with a plurality of insertion tubes 17, and the convex columns 16 of the upper square frame packing units are inserted into the corresponding insertion tubes 17 of the adjacent lower square frame packing units.
The sewage treatment method adopting the invention comprises the following steps:
rural domestic sewage collected by a collecting pipe network enters an adjusting tank 6 through a water inlet pipe 3, and due to the arrangement of a baffle plate 5, the sewage cannot directly enter an anoxic treatment tank 7, and is mixed and stays in the adjusting tank 6 for a short time, so that the adjustment of water quantity and water quality is realized;
when the water level of the regulating tank 6 exceeds the upper limit of the water level, the water pump 10 is controlled by the liquid level controller 11 to be started, sewage of the regulating tank 6 enters the anoxic treatment tank 7 through the water channel 8, the sewage flows from the water channel 8 end to the pump pit 9 end in the anoxic treatment tank 7, the frame filler 13 contacts in the flowing process, after denitrification deodorization is carried out under the action of microorganisms loaded by the frame filler 13, the sewage flows to the pump pit 9, after being lifted upwards by the lifting pump, part of the sewage enters the waterwheel driving biological turntable 18 as driving water to provide driving power for the waterwheel driving biological turntable 18, and the driving water is not purified by the waterwheel driving biological turntable 18 and flows back into the pump pit 9 through the driving water return pipe; the other part enters a waterwheel to drive a biological rotating disc 18 to carry out nitration reaction under the action of aerobic microorganisms, organic matters and ammonia nitrogen in the sewage are removed, after the sewage is treated by the aerobic microorganisms, the organic matters are reduced, nitrate is increased, purified water is formed, wherein one part of the purified water is discharged outwards, the other part of the purified water flows back to the inlet end of the anoxic treatment tank 7 due to the high concentration nitrate, flows through a frame filler 13 after being mixed with the sewage from the regulating tank 6, contacts with microorganisms attached to the frame filler 13, and nitrate and the like in the returned purified water are used as electron acceptors to participate in denitrification and deodorization processes of the microorganisms in the anoxic treatment tank 7.
When the sewage flow rate of the water inlet pipe 3 entering the anoxic tank 1 is smaller than the flow rate of the water pump 10 for lifting and discharging the anoxic tank 1, the water level of the regulating tank 6 is reduced, and when the water level of the regulating tank 6 is reduced to the lower limit of the water level, the water level controller 11 controls the water pump 10 to be turned off; the water pump 10 is automatically started and stopped under the control of the liquid level controller 11, and adapts to the flow change of the inflow water, so that the frame filler 13 in the anoxic treatment tank 7 is always below the liquid level, and the stable realization of the deep anoxic denitrification deodorization function is ensured.
The above described embodiments are only preferred examples of the invention and are not exhaustive of the possible implementations of the invention. Any obvious modifications thereof, which would be apparent to those skilled in the art without departing from the principles and spirit of the present invention, should be considered to be included within the scope of the appended claims.
Claims (6)
1. The sewage treatment system is characterized by comprising an anoxic tank (1) and a waterwheel driving biological turntable (18) communicated with a lifting drain pipe (4) of the anoxic tank (1), wherein the anoxic tank comprises a tank body (2), a water inlet pipe (3) and a lifting drain pipe (4) are arranged on the tank body (2), a partition plate (5) arranged in the middle of the tank body (2) is arranged, the partition plate (5) divides the tank body (2) into an upper regulating tank (6) and a lower anoxic treatment tank (7), one end of the partition plate (5) is provided with a water channel (8) communicated with the regulating tank (6) and the anoxic treatment tank (7), the water inlet pipe (3) is arranged at the upper part of the regulating tank (6), one end of the bottom of the anoxic treatment tank (7) away from the water channel (8) is provided with a pump pit (9), a water suction pump (10) is arranged in the pump pit (9), and the lifting tank (4) is communicated with the water drain pipe (10); the waterwheel driving biological rotating disc (18) comprises a sewage water inlet (19), a driving water inlet (20), a driving water outlet (21) and 2 purified water outlets (22), and the lifting water outlet (4) is respectively communicated with the sewage water inlet (19) and the driving water inlet (20) through corresponding branch pipes;
a driving water return pipe (23) is arranged on the pump pit (9), and the other end of the driving water return pipe (23) is communicated with a driving water outlet (21) of the waterwheel driving biological rotating disc (18);
the partition plate (5) is obliquely arranged, one end, close to the water passing channel (8), of the partition plate is low, and one end, far away from the water passing channel (8), of the partition plate is high;
the water pump is characterized in that the regulating tank (6) is provided with a liquid level controller (11), the liquid level controller (11) is used for controlling the start and stop of the water pump (10), when the water level of the regulating tank (6) is higher than a set highest water level, the liquid level controller (11) controls the start of the water pump (10), and when the water level of the regulating tank (6) is lower than a set lowest water level line, the liquid level controller (11) controls the water pump (10) to be closed.
2. A sewage treatment system according to claim 1, wherein the anoxic treatment tank (7) is further provided with a purified water return pipe (24), an inlet end of the purified water return pipe (24) is communicated with 1 purified water outlet (22) of the waterwheel-driven biological rotating disc (18), and an outlet end of the purified water return pipe (24) is arranged at an upper part of the anoxic treatment tank (7) and is positioned under the water passing channel (8) or flush with the water passing channel (8).
3. A sewage treatment system according to claim 1, wherein the partition (5) is a flexible membrane.
4. A sewage treatment system according to claim 1, wherein the tank (2) is a closed tank (2), and wherein a manhole (12) is provided in the top wall of the tank (2).
5. A sewage treatment system according to claim 1, characterized in that a plurality of frame fillers (13) are arranged in the anoxic treatment tank (7), and the frame fillers (13) are formed by sequentially inserting a plurality of frame filler units from bottom to top.
6. A sewage treatment system according to claim 5, wherein the frame packing unit comprises a bracket (14) and a felt (15) arranged on the bracket (14), a plurality of protruding columns (16) are arranged at the lower part of the bracket (14), a plurality of inserting tubes (17) are arranged at the top of the bracket (14), and the protruding columns (16) of the upper frame packing unit are inserted into the corresponding inserting tubes (17) of the adjacent lower frame packing unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210429406.6A CN114873712B (en) | 2022-04-22 | 2022-04-22 | Anoxic tank and sewage treatment system comprising anoxic tank |
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| CN202210429406.6A CN114873712B (en) | 2022-04-22 | 2022-04-22 | Anoxic tank and sewage treatment system comprising anoxic tank |
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| CN114873712A CN114873712A (en) | 2022-08-09 |
| CN114873712B true CN114873712B (en) | 2023-06-23 |
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| CN115536152A (en) * | 2022-10-12 | 2022-12-30 | 陕西省水务集团环境技术运维有限公司 | Sewage low temperature denitrification processing system |
| CN115784424A (en) * | 2022-10-26 | 2023-03-14 | 东南大学 | Intelligent water distribution large-torque multistage waterwheel driving biological rotating disc system |
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| KR100530555B1 (en) * | 2003-07-21 | 2005-11-23 | 한국과학기술연구원 | Small-scale facility and method for treating wastewater biologically |
| CN103979681B (en) * | 2014-04-03 | 2015-06-17 | 江苏蓝晨环保科技有限公司 | Nitrification/denitrification integrated rural domestic sewage treatment system |
| CN110204037A (en) * | 2019-07-05 | 2019-09-06 | 浙江联池水务设备股份有限公司 | A kind of insertion slot type filler plate and its system |
| CN210825883U (en) * | 2019-11-11 | 2020-06-23 | 焦熙宇 | High-stability purification equipment for environmental pollution water |
| CN112897801A (en) * | 2021-01-11 | 2021-06-04 | 岭南水务集团有限公司 | Efficient composite flow constructed wetland system and implementation method thereof |
| CN113371926B (en) * | 2021-04-30 | 2022-04-12 | 东南大学 | Rural distributed domestic sewage biological ecological coupling device with sustainability |
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