WO2011160486A1

WO2011160486A1 - Wastewater treatment apparatus using high efficient and stable bio-doubling process

Info

Publication number: WO2011160486A1
Application number: PCT/CN2011/072832
Authority: WO
Inventors: 凌建军; 赵东霞
Original assignee: 凌志环保有限公司
Priority date: 2010-06-22
Filing date: 2011-04-15
Publication date: 2011-12-29
Also published as: CN102180543B; CN102180543A

Abstract

A wastewater treatment apparatus using a high efficient and stable bio-doubling process is provided, which comprises an influent mixing reaction zone (1), a water lifting zone (2), an aerobic aeration zone (3) and a sedimentation zone (4) disposed according to the intake order and connected in series. The aerobic aeration zone (3) is an annular channel, in which a flow impelling device (10) is provided. The influent mixing reaction zone (1), the water lifting zone (2) and the sedimentation zone (4) are provided inside the annular channel, which is communicated with the sedimentation zone (4) and the influent mixing reaction zone (1), respectively. A conflict between the low dissolved oxygen level and the high sludge content, which are needed in the bio-doubling process, is well solved by the structure of the apparatus.

Description

Instruction manual

Efficient and stable biological multiplication process sewage treatment device

Technical field

The invention relates to an improvement of a biological multiplication process water treatment device, in particular to an efficient and stable biological multiplication process sewage treatment device capable of forming two or more treatment cycles by changing the layout of the treatment tank (the annular groove built-in built-in biological multiplication treatment device) ).

Background technique

Bio-dopp is a novel wastewater treatment process invented in Germany that combines all single processes (bionitrification, denitrification, phosphorus release, phosphorus uptake, organic oxidation, precipitation, etc.) in one phase. It is divided into rectangular tanks with several different treatment units, and low-dissolved oxygen (usually 0.3~0.5mg/l) for longitudinal short-range nitrification/denitrification denitrification, high sludge concentration (usually 5~8g/l) The treatment is efficient and stable (low dissolved oxygen and high sludge concentration are the two characteristics of the process). Compared with the existing water treatment process, it has the advantages of simple operation, high efficiency of biological nitrogen removal and good phosphorus removal under low dissolved oxygen, simultaneous synchronization with the pool and short-cut nitrification/denitrification, high efficiency, continuous operation, stable water discharge and low sludge production. Out, the excess sludge can be 40-60% less than the traditional process, the maintenance workload is small, the floor space is small, and the rectangular pool is used to save a lot of land. The sewage treatment plant only needs half of the area of a conventional process sewage treatment plant, and the reduction is greatly reduced. In the province of pipeline investment, investment and operating costs are low, and investment and operating costs can be reduced by about half. Therefore, it is emphasized and promoted in sewage treatment.

The existing biological multiplication process, the basic structure of the treatment tank plane layout is shown in Figure 1. In a rectangular pool, adjacent aeration aerobic zone 3, air lift zone 2, influent mixed anaerobic reaction zone 1 (phosphorus release zone) , a built-in mud water separation packing 8 and a sedimentation zone 4 of the scraper/sucker 9. The treated water enters the influent mixed anaerobic reaction zone 1, and is diluted and mixed with the initially obtained muddy water mixture, and is subjected to anaerobic phosphorus release treatment therein, and then enters the stripping zone 2 through the bottom to be lifted by the stripping device. The aeration aerobic zone 3 with an aeration hose is subjected to aerobic treatment in the aerobic aerobic zone, and then enters the influent mixed anaerobic reaction zone through the precipitation zone 4 to form a single treatment cycle. The sludge in the sedimentation tank is partially replenished by the bottom connected influent mixed anaerobic reaction zone, and the rest is discharged by the scraper/sucker. However, in actual engineering operation, due to defects in the layout of the process tank, it is difficult to achieve the required low dissolved oxygen (for example, 0.3~0.5mg/l) and high-activated sludge (for example, 5~8g/l). Ideal state, so the actual engineering operation is difficult to achieve the design effect, the reasons:

In the single cycle of treatment, the muddy water mixing and flow mainly depends on the bottom aeration hose and the hydrodynamic force generated by the stripping, which is low. The contradiction between dissolved oxygen aeration and high sludge concentration is difficult to coordinate. For example, low dissolved oxygen is required, and aeration produces low power. High sludge is easy to produce sludge sedimentation, which not only causes the sludge concentration to decrease, but also affects the treatment effect. Mud settlement also affects the normal operation of the bottom aeration equipment; in order to prevent sludge settling, increase the aeration volume, and it is difficult to achieve efficient short-range nitrification/denitrification due to excessive dissolved oxygen, the actual dissolved oxygen in the project usually reaches 2mg/ l Left and right, resulting in short-range nitrification / denitrification effect can not meet the design requirements, resulting in low nitrogen removal efficiency, easy to appear water and nitrogen is not up to standard. Secondly, the flow force of the mud-water mixing cycle mainly depends on the liquid level difference formed by the gas stripping. The relatively low flow rate and the long distance of the treated water circulation flow also limit the increase of the sludge concentration, and it is difficult to achieve the high sludge concentration required for the biomultiplication. The reduction of sludge concentration in turn affects short-range nitrification/denitrification. At the same time, the cycle power provided by the liquid level difference is only obtained by gas stripping, and the circulating fluid passes through the sedimentation tank, resulting in a small circulation of the mixed liquid, poor reflux ratio adjustability, and anti-loading. Impact and heavy rain impacts are poor. For example, when the influent water quality is abnormal or heavy rain, stable sludge activity and concentration cannot be maintained. Then, the sedimentation zone is arranged adjacent to the aerobic aerobic zone, and the sedimentation zone is responsible for the cyclic overcurrent. It is not only difficult to ensure the clarification of the required water flow static, affecting the clarification effect, but also prone to the sludge from the flowing muddy water. The concentration of sludge in the circulating sewage is reduced; in the case of a sudden increase in the amount of water entering the storm, it is easy to cause the sludge to be lost due to the large flow of water, which also causes the concentration of the circulating sludge to decrease after the rain. If the stripping is turned off, the sludge can be reduced. Loss, but it will cause a lack of sludge renewal cycle, so that the nutrients needed to maintain microbial metabolism are not enough, resulting in microbial metabolism and nutrient deficiency, resulting in microbial non-nutrient source "starvation death", resulting in a longer recovery time after rain, affecting normal effluent Therefore, the ability to withstand heavy rain is poor. In addition, the layout of the pool type processing unit has only one cycle of the muddy water mixture in the process, and the pools are operated in series to form a closed single cycle, so that any one of the pools is inspected, which affects the operation of the other pools. The aforementioned defects caused by the structure of the treatment pool seriously affect the biomultiplication process and have advantages and treatment effects, which makes it difficult to achieve the design effect in actual engineering operation, and limits the advantages of the biomultiplication process.

Furthermore, the low dissolved oxygen in the biomultiplication process can treat the wastewater with low ammonia nitrogen content and achieve energy consumption, but when the sewage ammonia nitrogen (NH ₃ -N) concentration is high, such as tannery wastewater and alcohol wastewater Etc. (NH ₃ -N lOOmg/1), low dissolved oxygen will lead to insufficient aerobic zone feeding, it is difficult to achieve complete oxidation of ammonia nitrogen, affecting the removal effect of ammonia nitrogen, thus limiting its application in high ammonia nitrogen wastewater, resulting in process limitation.

The Chinese patent CN101602541 biological sewage treatment process and device, the treatment pool type is still the same as the typical biological multiplication, and the above disadvantages caused by the pool structure have not been overcome.

The above shortcomings still have room for improvement.

Summary of the invention The object of the present invention is to overcome the above-mentioned deficiencies of the prior art, and to provide a low-dissolved oxygen which not only ensures short-range nitrification/denitrification, but also has a high sludge concentration, and can form two or more circulations during the treatment process, and can fully exert An efficient and stable bio-multiplying process wastewater treatment device with the advantages of biomultiplying process.

Another object of the present invention is to provide a highly efficient and stable biological multiplication process sewage treatment device which has good process adjustability and can be applied to various waste waters.

The object of the present invention is to realize that the aerated aerobic zone in the original biological multiplication process is designed as an annular groove, and a push-flow device for forming a circulation flow is arranged in the annular groove, and the adjacently disposed lifting zone, the influent mixing reaction zone and the sedimentation are arranged. The object is moved to the inner side of the annular groove, and the corresponding functional area is connected, and at least two circulations are formed through the annular groove, thereby overcoming the deficiencies caused by the layout of the existing biomultiplication process processing pool, and achieving the object of the present invention. Specifically, the present invention is an efficient and stable bio-multiplying process sewage treatment device, comprising an influent mixing reaction zone, a water lifting zone, an aerobic aerobic zone and a sedimentation zone connected by a biological multiplication process, characterized by aerated aerobic zone. It is an annular groove, and there is a water flow propulsion device in the annular groove. The influent mixed reaction zone, the water lifting zone and the sedimentation zone are inside the annular groove, and the annular groove is respectively connected with the sedimentation zone and the influent mixed reaction zone.

The basic process of the apparatus of the present invention is substantially the same as the prior art biomultiplying sewage treatment process:

The influent water is treated first, and then enters the influent mixed reaction zone. The influent mixed reaction zone is treated according to the water quality condition, and the returned flow can be adjusted to anoxic state or anaerobic state, respectively, for biological nitrogen removal or biological phosphorus removal. The sewage treated by biological denitrification or biological phosphorus removal enters the lifting zone through the communication port or pipe, is lifted into the aerobic annular groove by the lifting device, forms a circulation in the annular groove under the push of the water flow propulsion device, and passes through the annular groove to the other The treatment unit is equipped with water; for example, a part of the mixed mud water in the annular groove enters the sedimentation zone through the opening of the pool wall or the communication pipe, and the mud water is separated, and the clarified water is collected and discharged by the upper water outlet; a part of the mixed mud water flows through the opening of the pool wall through the annular groove. The influent mixed reaction zone cycle (referred to as a small cycle), a part of the mixed mud water circulating in the annular groove (referred to as a large cycle), so that the treated sewage is formed into at least two treatment cycles, and the circulation amount is adjusted according to the sewage water quality. The sedimentation tank precipitates the sludge, and some of it is returned to the influent mixed reaction zone through the opening of the tank wall to maintain the high sludge concentration in the treatment, and the rest is discharged as excess sludge. Since the pushing device is added in the annular groove, the mixed mud water is circulated in the annular groove, which ensures that the biological multiplication process requires a small amount of aeration under low dissolved oxygen, and the high sludge content does not settle (the mixed mud water flow mainly depends on The push-flow device pushes the flow, which not only ensures the short-cut nitrification/denitrification, but also maintains a high sludge content, which ensures the advantages of the biomultiplication process. The volume of each pool is calculated and determined according to the water quality and process requirements.

In the present invention:

Aerated aerobic annular ditch, one is the existing bio-multiplication technology as an aerobic reaction zone, longitudinal short-range nitrification/denitrification deoxidation under low dissolved oxygen, and biological removal of organic matter, and second, formation of mixed muddy water to provide water distribution The channels form at least two processing loops. According to this function, the annular groove, the groove shape can be, for example, a rectangular groove, or can be similar The arc-shaped hooks at both ends of the oxidation ditch can extend the circulation time of the mixed mud water in the aerobic ditch, and can meet the requirements of the circulation residence time in the short block, and can also design the two ditch or more of the annular groove. The oxygenation device in the annular groove is basically similar to the biological multiplication process, and mainly uses oxygen supply from the bottom aeration oxygen supply device, for example, various microporous aerators for water treatment, jet aeration devices, and aeration aeration. Devices, etc., especially microporous aerators, which produce small bubbles, large specific surface area, slow rising flow rate, easier access to oxygen by microorganisms, and improved oxygen transfer efficiency. In addition, depending on the water quality of the treated water, such as wastewater treatment with too high or too low ammonia nitrogen, it is also possible to form a surface aeration device or a bottom aeration + surface aeration two oxygenation modes by adding a surface aeration device. Increase dissolved oxygen in water.

The water flow propulsion device in the annular groove mainly provides the power for the rapid flow of the mixed mud water in the annular groove to ensure the long circulation circulation on the one hand and the sufficient flow velocity of the mixed mud water on the other hand to prevent the high concentration sludge from being contaminated by the low flow rate. Mud settlement. The vertical short-cut nitrification/denitrification aeration oxygen supply is separated from the mixed mud water flow force, thereby ensuring low dissolved oxygen required for short-path nitrification/denitrification, and maintaining high circulating sludge concentration of the circulating liquid. It is well coordinated with the high sludge concentration and low dissolved oxygen contradiction in the biomultiplication process, so that the two meet the process requirements. The water flow propulsion device, because its main function is to provide the mixed mud water flow pushing force, theoretically, the propeller can be not limited, for example, it can be an impeller propeller, or an oxidation ditch with a turntable or a rotating brush, and a jet, suction. As the ejector, etc., as long as the power that can push the flow of water can be applied, in order to avoid excessive oxygenation in the push flow to destroy low dissolved oxygen, it is better to use an underwater propeller. From the formation of the push flow function, the propulsion device can be designed at any position of the annular groove, and one of them is preferably disposed near the lifted water area, and can simultaneously increase the push flow by using the lift water level difference to reduce the push flow power. Depending on the treatment water design, the annular groove circulation length, the water flow propulsion device, may be one or two or more on the process path. In the large cycle, in order to prevent the end of the circulation due to the decrease of the flow rate, the sludge is settled, and the water flow propelling device pushes the flow, and the gap can be designed to run in both directions, for example, using the front and back of the turntable gap, so that the cycle head and tail alternate can effectively prevent the end flow rate. Lowering leads to sludge precipitation.

The lifting device, with the main function and the biological multiplication process, lifts the mixed mud water from the influent mixing reaction zone into the outer annular groove to form an updated circulation. The lifting device may be a pump or a stripping device, or other device with a water lifting function, for example, opening a hole in the lifting zone and the annular groove wall, and setting a propeller, one of which is preferably air lifting, gas It has low energy consumption and energy saving. The lifting zone may be arranged in parallel with the influent mixing reaction zone or vertically.

The influent mixing reaction zone is the first step of the influent treatment. In addition to the influent mixing function, according to the influent water quality, the amount of return flow entering the influent zone can be adjusted to be anoxic state or anaerobic state, respectively. The biological denitrification-based operation mode or the biological phosphorus removal-based operation mode is realized respectively, and the biological denitrification is mainly used, or the biological phosphorus removal is the main treatment function, so it can also be called anaerobic zone or anoxic zone. .

In addition:

In order to improve the water flow state in the influent mixed reaction zone, prevent sludge from sedimentation due to high sludge concentration, and accelerate the influent In the mixing water zone, an accelerated mixing agitating device such as an impeller propeller, a stirrer, and the like, and a hydraulic mixer and a propeller are preferably disposed to improve the mixing ability and the flow velocity of the sewage.

In the sedimentation zone, in order to achieve rapid clarification and to enhance the clarification effect, the bio-multiplying process can be combined with the accelerated mud-water separation sedimentation packing in the sedimentation tank, such as sloping plate or inclined pipe mud water separation filler. The sloping plate or the inclined pipe may be inclined by a straight channel, for example, a 60-degree oblique manner, or may be vertically installed by a vertical curved corrugated swash plate; the sludge is sedimented at the bottom, and a part is opened or connected through the bottom to the influent mixed reaction zone. The activated sludge is replenished to maintain the sludge content requirement, and part of it is discharged into the sedimentation tank. The discharge sedimentation tank can be discharged through a scraping/sucking device installed in the sedimentation zone or by a suction pump fixedly installed in the sedimentation zone or close to the sedimentation zone. Depending on the shape of the sedimentation tank, the scraping and/or suction device can be reciprocating or rotary, leaving only the drive space on either side or center of the accelerated sedimentation water separation packing.

In order to enhance the process adjustability of the shaped pool, improve the adaptability to the treated sewage, and further save the operating energy consumption, it is better to provide a controllable door or valve on the shared wall of the lifting zone and the annular groove or Push device. In operation: For example, when the concentration of influent pollutants is low, when the processing requirements are met by a small circulating flow rate, the lifting device can be stopped or reduced, and the pushing device of the door or valve or the wall of the tank can be opened to the annular groove. Replenish water, which saves energy and saves energy. In order to improve the "automatic force" of the self-flowing into the annular groove, the water flow propulsion device for advancing the circulation in the annular groove is preferably disposed at the front end of the water flow direction of the controllable door or the valve or the flow device, and the suction function formed by the push device ", enhance self-flow "power" and self-flow.

In order to improve the nitrogen removal ability of high NH ₃ -N (for example, NH ₃ -N^ 100 mg/1 leather, alcohol) wastewater, the dissolved oxygen content of the aerobic ditch can be increased by increasing aeration, for example, to dissolve oxygen to 2 mg/ l. To increase the dissolved oxygen mode, it is possible to increase the amount of gas supplied by the bottom exposure, or to increase the surface exposure device, such as an oxygenation device such as a turntable or a rotating brush, or to separately use the surface to expose oxygen.

The invention relates to the high-efficiency and stable biological multiplication process sewage treatment device. Compared with the existing biological multiplication process pool type, the aeration aerobic zone is changed into an annular groove due to the change of the pool type arrangement structure, and the water flow of the propulsion circulation is set in the annular groove. The propulsion device is placed adjacent to the inner side of the annular groove in the other processing function zones. This brings about the following changes:

Firstly, the treatment of the mixed liquid circulation form is increased and the circulation flow rate is increased, so that the treated mixed mud water forms an influent mixing reaction zone, a lifting zone, an aerobic annular groove, a small mixed flow reaction zone, and a large aerobic annular groove. Circulation; and there is also aerobic annular groove-precipitation zone water outlet channel (precipitated water is separated from the treatment cycle), so that when one of the unit equipment needs to be repaired, the operation cycle will not be stopped due to the inability to realize the treatment cycle, and the small cycle The low-concentration circulating mixture that has been treated has a large specific dilution of the influent water (the circulating flow rate can be tens or even thousands of times the influent amount as needed), so that the influent pollutant concentration is rapidly reduced, so that the influent water is The concentration difference of pollutants in the influent mixed reaction zone is greatly reduced, which effectively avoids the impact of high concentration of COD in the influent on the activated sludge, stabilizes the microbial growth environment, and thus improves the impact load resistance; Large circulation increases the hydraulic flow and stoppage of sewage in the aerobic annular groove The residence time (the aerobic process is lengthened) not only enhances the removal of COD, B0D, NH ₃ -N, especially total nitrogen, but also reduces the concentration of pollutants in the circulating fluid due to the circulation of water in the circulating fluid. At the end of the cycle, the dissolved oxygen concentration is relatively increased, and the nitrate nitrogen content is increased, thereby strengthening the denitrification function, and has better treatment effect on the refractory organic wastewater and the poorly biochemical wastewater, especially the annular groove design. The combination of two ditch or more extends the mixing mud water circulation time and the high-end dissolved oxygen process, improves the sewage treatment capacity, ensures that the total nitrogen output of the effluent is stable, and the design also improves the adaptation to short plots. Sex. The high circulation flow rate ensures that under low aeration dissolved oxygen (dissolved oxygen can be at least 0.1 mg/l), high fouling content (such as sludge concentration of 8 g/l) does not cause sludge precipitation, preferably It solves the contradiction between low dissolved oxygen and high sludge content in the biomultiplication process; in addition, the high flow rate generated by the propeller also makes the muddy water mixing and the mass transfer with oxygen to accelerate, which can ensure the advantage of the biomultiplication process; Further increase the sludge concentration. In addition, the groove design and the addition of the flow device increase the reflux ratio and the adjustability of the reflux ratio, and the reflux ratio can be flexibly adjusted according to the sewage treatment condition; the large reflux ratio maintains a high sludge concentration. The high sludge concentration can ensure the longitudinal short-range nitrification/denitrification with lower dissolved oxygen, and the short-range nitrification/denitrification effect is good. The good coordination between the two is the biggest difference between the patent and the existing bio-multiplying pool arrangement.

Secondly, the sedimentation zone is placed in the annular groove, which only serves as the separation and clarification of the muddy water, without the original circulation flow function, which not only ensures the static flow required for clarification, but also facilitates rapid clarification and high clarification effect, even if no accelerated muddy water is provided. Separation of the precipitated packing can also achieve the precipitation separation well; and overcome the phenomenon that the sludge in the precipitating zone overflows in the prior art to cause sludge precipitation and reduce the circulating sludge concentration.

Furthermore, a controllable door or valve is added between the lifting zone and the annular groove, so that the concentrating device can be turned off at a low concentration of heavy rain or influent water, and a fresh mixed liquid is provided for circulation by means of a door or a valve to maintain a certain supplementary cycle. The amount, in order to ensure the maintenance of microbial metabolism required nutrients, can avoid the closure of the increase, resulting in no supplemental mixture circulation caused by microbial metabolic nutrient deficiency caused by microbial non-nutrient source "starvation death", but also saves aeration energy consumption, achieve more energy saving run. At the same time, when the rain is exposed, the influent water can directly enter the sedimentation zone, and is directly discharged after clarification, thereby avoiding the phenomenon of sludge loss caused by heavy flow caused by heavy rain, improving the anti-storm impact ability of the process, and being easy to be used for system recovery. At the same time, a controllable gate or valve is added between the lifting zone and the annular groove, which also improves the flexibility of the treatment device according to the treatment of sewage.

The high-efficiency and stable biological multiplication process sewage treatment device of the invention maintains the biological multiplication process operating condition, and is different from the existing biological multiplication pool type, and the annular groove has a built-in bio-multiplying treatment tank type to ensure the biological multiplication process requirement- Low dissolved oxygen, high sludge concentration, can be realized in the actual project, the dissolved oxygen of the patent pool can be controlled at 0. 1~ 0. 5mg / l, the sludge concentration can be actually increased to 5~8g / l or more High (depending on the push flow) without sludge precipitation. The invention overcomes the shortcomings that the existing biomultiplication process unit layout is difficult to overcome, can fully exert the biological multiplication process treatment effect and advantages, and has strong process adaptability, can adjust the total reflux ratio according to different treatment sewage and treatment requirements, and two Circulating back flow, high efficiency and stable realization of bio-multiplication process, and improved impact load resistance and anti-exposure impact energy Force, this is the biggest feature of the utility model.

Adding or replacing an aeration turntable, a rotating brush, etc. on the aerobic ditch, by increasing the dissolved oxygen content of the aerobic ditch, for example, increasing the dissolved oxygen to 2 mg/l or higher, can increase the high NH ₃ - The nitrogen removal capacity of wastewater such as leather and alcohol of N (for example, NH ₃ _N lOOmg/1) expands the application range of the biomultiplication process. Moreover, the device can flexibly increase the realization of the aeration device according to the water quality condition after construction or completion, and further improves the flexibility of the patent device, and the application expandability is good, and the existing biomultiplication process pool layout is overcome. It is difficult to extend the limitations of the function.

The present invention is described in the following with reference to the embodiments of the present invention. The technical solution defines that some of the non-substantial additions and/or modifications of the present invention, such as those which have the same or similar technical effects, are simply changed or replaced, and are within the scope of the present invention. DRAWINGS

FIG. 1 is a schematic diagram of a basic pool type arrangement of a prior art biomultiplication process.

2 is a schematic view showing the basic pool arrangement of the high-efficiency and stable biological multiplication process sewage treatment device of the present invention.

Figure 3 - Figure 12 are schematic diagrams of various deformation cell types (omission of internal devices).

detailed description

Embodiment 1, Referring to FIG. 2, the high-efficiency and stable biological multiplication process sewage treatment device of the present invention comprises a long hollow rectangular annular groove 3, and a microporous aerator 5 is arranged at the bottom of the full groove to form an aerobic treatment functional zone, and the inner side of the annular groove Arranged from left to right adjacent to each other are: a rectangular precipitation zone 4, an influent mixing reaction zone 1 and a stripping zone 2. The precipitating zone 4 has an inclined pipe 8 for accelerating sedimentation and a driving scraper 9 having a width smaller than the width of the pool; an underwater mixing propeller 6 is disposed in the influent mixing reaction zone 1 near the end of the sedimentation zone; A stripping device 7 is provided in 2. The stripping zone 2 and the annular groove 3 share a pool wall with a communicating opening and a controllable gate. 11 The annular groove 3 is provided with a hydraulic propeller 10 at the upper end of the water flow. The annular groove 3 and the wall of the sedimentation zone 4 are provided with through holes according to the designed flow rate, and the annular groove 3 and the inlet water mixed reaction zone 1 have a backflow through hole, and the bottom of the sedimentation zone 4 and the influent mixed reaction zone 1 are dirty. The mud return passage, the influent mixed reaction zone 1 is in communication with the bottom of the lift zone 2. The aeration volume of the aerobic annular groove bottom microporous aerator is detected by an online dissolved oxygen meter and controlled by a PLC controlled variable frequency fan, so that the wind supply of the fan changes with the influent concentration, ensuring that the biological multiplication process design has a low dissolved oxygen amount. It will not affect the quality of the effluent due to insufficient oxygen supply, nor will it cause changes in strains due to transitional oxygen supply, and reduce the effect of short-range nitrification/denitrification. The communication ports between the treatment tanks are equipped with controllable gates, and the opening amount is adjusted according to the processing requirements to achieve the process optimization.

The treated sewage first enters the influent mixing reaction zone 1, and is rapidly mixed with the original muddy water mixture under the action of the propeller 6. Combine, complete the mixing and dilution of the influent and treated diluted mixture, according to the treated water quality, adjust the entering and returning flow to the anoxic state or the anaerobic state respectively to realize the denitrification or dephosphorization function: enter the lifting through the bottom communication channel Zone 2, entering the aerobic annular groove 3 under the lifting of the stripping device 7, and forming a unidirectional circulation under the pushing of the water flow propelling device 10: a part of the mixed mud water enters the sedimentation zone 4 through the opening or connecting pipe of the pool wall, and the mud water is separated and clarified. The effluent discharge system; a part of the mixed mud water is passed through the aerobic annular groove through the cell wall opening or the communication pipe to enter the influent mixing reaction zone 1 to form a treatment cycle (small cycle), and a part of the mixed mud water is circulated in the annular groove (large cycle), synchronously realized Short-cut nitrification/denitrification denitrification, and degradation of organic matter. According to the actual treatment situation, adjust the gas extraction amount and the amount of water entering the sedimentation tank and the influent mixed reaction zone. The sedimentation tank precipitates the sludge, and is partially returned to the influent mixed reaction zone through the bottom, and the remaining part is discharged as a surplus sludge by a scraper/absorber. Tested by the test: When the flow velocity in the annular groove reached 0.3 m/s and above, no sludge sedimentation was observed at the sludge concentration of 8 g/l.

When the influent pollutant content is low, the treatment can be achieved by the main ditch circulation. The gas stripping can be stopped, the valve can be opened, the appropriate amount of influent replacement cycle can be maintained, and the nutrients required for microbial metabolism can be maintained. Save energy and increase the risk of microbial metabolic undernutrition caused by no-intake replacement cycle caused by shutdown.

In the case of heavy rain, the amount of water intake is increased, the concentration of sewage is reduced, and the lifting device can be temporarily shut down. The sewage directly enters the sedimentation zone and is directly discharged after being separated by the filler. Thereby, the phenomenon of sludge loss caused by heavy flow caused by heavy rain is avoided, and the anti-storm impact ability is improved; at the same time, the valve is opened, the proper amount of feed water replacement cycle is maintained, the nutrients required for microbial metabolism are maintained, and the system is easy to be used for recovery.

Embodiment 2, Referring to FIG. 3, as in Embodiment 1, wherein the precipitation zone 4 is designed as a circular sedimentation tank, and a sludge lift pump 12 is disposed near the sedimentation mixing zone 1 near the sedimentation tank 4 (may also be used in the sedimentation tank) Rotary scraper / suction machine).

Embodiment 3: Referring to Fig. 4, as in Embodiment 2, the annular groove 3 is changed to an elliptical racetrack type.

Embodiment 4: Referring to FIG. 5, as in Embodiment 1, the annular groove 3 is changed to an elliptical racetrack type, the lifting zone 2 is designed to be semicircular, and the sedimentation zone 4 is designed as a circular sedimentation tank, and the reciprocating scraper/sucker is replaced with Rotary scraper / suction dredge.

Embodiment 5: Referring to Figure 6, as in Embodiment 1, the stripping zone 2 is parallel to the long face of the annular groove 3.

Embodiment 6: Referring to Fig. 7, as described above, the sedimentation tank 4 and the stripping zone 2 are respectively disposed at two left and right. Both can be run side by side, or they can be run separately when servicing their equipment, ensuring that they do not stop running during maintenance.

Embodiment 7: Referring to Figures 8, 9, 10, as in Embodiment 6, wherein the influent mixing reaction zone 1 is also set to be juxtaposed, and the two can be operated in parallel, or can be separately operated when the equipment is inspected. To ensure that the operation does not stop during maintenance. The influent mixing reaction zone, the water lifting zone, and the precipitation zone may be provided separately. Two or two may be provided at the same time.

Embodiment 8: Referring to Figures 11 and 12, as described above, the annular groove can be designed as a two- or multi-groove fitting structure, and the water flow pusher is designed in two or more.

In addition, when dealing with high ammonia nitrogen wastewater, it is also possible to add an oxygenation device such as a turntable to the aerobic annular groove, or increase the amount of bottom aeration, or use a surface exposure device instead of the bottom exposure device, and increase the oxygenation amount to achieve The treatment of high ammonia nitrogen wastewater ensures that the effluent nitrogen emission is up to standard.

For those skilled in the art, some variations that can be directly derived or associated with the present disclosure and common knowledge will be apparent to those skilled in the art, and those skilled in the art will recognize that other methods may be employed. Or alternatives to the well-known techniques commonly used in the prior art, and different combinations of features, such as changes in the shape of each process zone, changes in the water flow propulsion device in the annular groove, such as the use of a turntable, aeration device change, in the water inlet zone The hydraulic propeller is changed to the suction or agitation type, the gap of the water flow propulsion device is forward and reverse, and the non-substantial modification of the water propulsion device can also be applied, and the functions and effects described in this patent can be realized. The detailed description is in the scope of this patent.

The apparatus of the present invention may be a factory prefabricated structure or a site structure depending on the amount of treated water.

Claims

The invention provides a high-efficiency and stable biological multiplication process sewage treatment device, comprising an influent mixed reaction zone, a water lifting zone, an aerobic aerobic zone and a sedimentation zone connected by a biological multiplication process, wherein the aerated aerobic zone is In the annular groove, there is a water flow propulsion device in the annular groove, the influent mixed reaction zone, the water lifting zone and the sedimentation zone are inside the annular groove, and the annular groove is respectively connected with the sedimentation zone and the influent mixed reaction zone. The high-efficiency and stable biological multiplication process sewage treatment device according to claim 1, characterized in that the aeration aerobic zone is supplied with oxygen by the bottom aeration. The high-efficiency and stable biological multiplication process sewage treatment device according to claim 2, wherein the bottom aeration oxygen supply is a microporous aerator. The high-efficiency stable biomultiplying process sewage treatment apparatus according to claim 1, wherein at least one of the water flow propulsion means is disposed near the elevated water discharge zone. The high-efficiency and stable biological multiplication process sewage treatment device according to claim 1, wherein the water lifting device in the water lifting region is an air lifting and stripping device. The high-efficiency stable biomultiplying process sewage treatment apparatus according to claim 1, wherein the influent mixing reaction zone has an accelerated mixing agitation device. The high-efficiency and stable bio-multiplying process sewage treatment apparatus according to claim 1, characterized in that the precipitated zone has an accelerated precipitation separation filler. The high-efficiency and stable biological multiplication process sewage treatment device according to claim 1, characterized in that the water lifting zone and the annular groove share a communication hole and a controllable gate or valve. The high-efficiency and stable bio-multiplication process sewage treatment device according to claim 8, wherein the water flow propulsion device in the annular groove is disposed at a front end of the controllable gate or the valve water flow direction. The high-efficiency and stable biological multiplication process sewage treatment device according to claim 1, characterized in that the dissolved oxygen concentration in the annular groove is 0.1-0.5 mg/l, and the sludge concentration is 5-8 g/l.

A high-efficiency stable biomultiplying process sewage treatment apparatus according to claim 1, wherein the annular groove has a turntable and a rotating brush.

The high-efficiency stable biomultiplying process sewage treatment apparatus according to claim 1, wherein the influent mixing reaction zone, the water lifting zone, and the sedimentation zone are provided separately or simultaneously.

3. The high-efficiency stable biomultiplying process sewage treatment apparatus according to claim 1, wherein the communication ports between the treatment tanks have controllable gates. The high-efficiency and stable bio-multiplication process sewage treatment device according to any one of claims 1 to 13, characterized in that the annular groove has two or more sleeves.

The high-efficiency, stable bio-multiplying process sewage treatment apparatus according to claim 1 or 2, wherein the sedimentation zone has a scraping and/or suction dredging device.