CN217265332U - Integrated wastewater treatment reactor - Google Patents
Integrated wastewater treatment reactor Download PDFInfo
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- CN217265332U CN217265332U CN202221076288.7U CN202221076288U CN217265332U CN 217265332 U CN217265332 U CN 217265332U CN 202221076288 U CN202221076288 U CN 202221076288U CN 217265332 U CN217265332 U CN 217265332U
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Abstract
The utility model relates to an integration effluent treatment reactor belongs to sewage treatment technical field. The utility model comprises a facultative zone, a biological selection zone, an aerobic zone, a sedimentation zone, a water outlet weir, a stirrer, a rotational flow aerator, a gas collecting hood, a water inlet, a reflux port, a nitrifying liquid reflux port, a sludge reflux port and an overflowing hole, the water inlet and the reflux port are both communicated with a biological selection area which is communicated with a facultative area, the facultative zone is communicated with the aerobic zone, the sedimentation zone and the rotational flow aerator are both arranged in the aerobic zone, the facultative zone and the biological selection zone are respectively provided with a stirrer, the overflowing holes are arranged on the side wall of the sedimentation zone, the effluent weir, the gas-collecting hood, the nitrifying liquid return port and the sludge return port are all arranged in the sedimentation zone, the cyclone aerator is connected with an external compressed air pipe, the sedimentation zone is positioned above the cyclone aerator, the effluent weir, the sludge return port, the gas-collecting hood and the nitrifying liquid return port are sequentially arranged from top to bottom.
Description
Technical Field
The utility model relates to an integration effluent treatment reactor belongs to sewage treatment technical field.
Background
The facultative-aerobic process is realized by an integrated wastewater treatment reactor, namely an A/O process, and a front anoxic section and a rear aerobic section are connected in series. The A/O process is a commonly applied process in sewage treatment, and most of the A/O process is applied to the removal of organic matters in sewage, regardless of urban domestic sewage treatment or industrial wastewater treatment. The A/O process has the characteristics of simple structure, small control complexity, low operation cost, difficult sludge expansion and the like, is widely applied to various sewage plants all over the world, and is also a main process for treating municipal sewage in China.
In the traditional A/O process flow, sewage firstly enters a facultative tank to be mixed with return sludge, and part of easily biodegradable macromolecular organic matters are converted into micromolecular Volatile Fatty Acid (VFA) under the action of facultative anaerobic zymogens. The facultative tank has the primary function of denitrification, after the sewage enters the facultative tank, denitrifying bacteria utilize organic matters in the sewage and nitrate nitrogen in the reflux mixed liquid to perform denitrification, and the nitrate nitrogen is converted into nitrogen and released into the air, so that the biological denitrification effect is achieved. The organic matter concentration and the nitrate nitrogen concentration of the facultative tank are greatly reduced, which is specifically represented by the reduction of COD (chemical oxygen demand), nitrate nitrogen and total nitrogen quality of the anoxic tank, and phosphorus can be absorbed or released in the facultative tank.
The mixed liquid enters an aerobic tank from the anoxic tank, and the functions of the aerobic tank are mainly removing COD, nitrifying and absorbing phosphorus. The COD concentration in the mixed liquid entering the aerobic tank is very low, the phosphorus accumulating bacteria mainly obtain energy for self growth and propagation by decomposing PHB stored in the body, simultaneously, the excessive absorbed water soluble phosphorus is stored in the body in the form of phosphate, supernatant is discharged after the precipitation in the precipitation tank, part of the precipitated sludge flows back to the anoxic tank, and the other part of the precipitated sludge is discharged from the system in the form of residual sludge, thereby achieving the effect of biological phosphorus removal. Meanwhile, organic matters in the aerobic tank are biochemically degraded by microorganisms, ammonia nitrogen is nitrified, COD, ammonia nitrogen and total phosphorus in the effluent of the aerobic tank are greatly reduced, and nitrate nitrogen is obviously increased.
The DO of the A section of the A/O process is not more than 0.2mg/L, and the DO of the O section = 2-4 mg/L. The heterotrophic bacteria hydrolyze starch, fiber, carbohydrate and other suspended pollutants and soluble organic matters in the sewage into organic acid at the anoxic section, so that macromolecular organic matters are decomposed into micromolecular organic matters, insoluble organic matters are converted into soluble organic matters, and when products after anoxic hydrolysis enter an aerobic tank for aerobic treatment, the biodegradability and the oxygen efficiency of the sewage can be improved. In the anoxic zone, heterotrophic bacteria ammoniate contaminants such as protein and fat (N in the organic chain or amino groups in amino acids) to release ammonia (NH) 3 、NH 4 (+) under sufficient oxygen supply conditions, nitration of autotrophic bacteria to convert NH 3 -N（NH 4 To NO by oxidation of ++) 3 Return to tank A under reflux control and denitrification of heterotrophic bacteria under anoxic conditions to convert NO 3 Reduction to molecular nitrogen (N) 2 ) C, N, O, the ecological cycle is completed, and the sewage harmless treatment is realized.
The integrated wastewater treatment reactor in the prior art does not have a sludge-water separation function, and a sedimentation tank needs to be additionally arranged to separate sludge and water of the mixed liquid flowing out of the aerobic tank. The separated supernatant flows into a subsequent process section, and most of the activated sludge precipitated at the bottom flows back to the facultative tank at the front end so as to maintain the concentration of the activated sludge in the facultative-aerobic tank. And discharging a small part of excess sludge into a sludge treatment system, and carrying out outward transportation treatment after filter pressing and dehydration.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects existing in the prior art and provide an integrated wastewater treatment reactor with reasonable structural design.
The utility model provides a technical scheme that above-mentioned problem adopted is: the integrated wastewater treatment reactor is structurally characterized in that: including oxygen district, biological selection district, good oxygen district, settling zone, play water weir, mixer, whirl aerator, gas collecting channel, water inlet, backward flow mouth, nitrify liquid backward flow mouth, mud backward flow mouth and overflow hole concurrently, water inlet and backward flow mouth all with biological selection district intercommunication, biological selection district and oxygen district intercommunication concurrently, oxygen district and good oxygen district intercommunication concurrently, settling zone and whirl aerator all set up in good oxygen district, respectively be provided with a mixer in oxygen district and the biological selection district concurrently, overflow hole sets up the lateral wall at the settling zone, play water weir, gas collecting channel, nitrify liquid backward flow mouth and mud backward flow mouth and all set up in the settling zone.
Further, the rotational flow aerator is connected with an external compressed air pipe.
Further, the settling zone is located above the cyclone aerator.
Furthermore, the effluent weir, the sludge return port, the gas-collecting hood and the nitrifying liquid return port are sequentially arranged from top to bottom.
Furthermore, the water outlet weir and the sludge return port are arranged at the upper part of the settling zone, and the gas collecting hood and the nitrified liquid return port are arranged at the lower part of the settling zone.
Further, the lower part of the settling zone is arranged in a closing-up structure.
Furthermore, the gas collecting channel is arranged in an inverted V-shaped structure.
Furthermore, the water outlet weir is arranged in a U-shaped groove structure.
Further, the number of the cyclone aerators is 4.
Furthermore, magnetic powder carriers are arranged in the facultative zone, the biological selection zone, the aerobic zone and the sedimentation zone.
Compared with the prior art, the utility model has the advantages of it is following: the reactor integrates a facultative zone, an aerobic zone and a sedimentation zone, integrates three functions into one reactor, and realizes the functions of facultative/aerobic biochemical reaction, mud-water separation, sludge backflow, mixed liquid backflow and the like in the same reactor; meanwhile, the magnetic powder carrier is arranged in the reactor, and the species of active microorganisms in the system are richer and the treatment efficiency is higher through the film hanging effect of the magnetic powder carrier; the method realizes high integration of treatment process, simple and convenient operation and management, and can effectively reduce the occupied area of equipment and the investment cost and the operating cost.
1. The integration level is higher, the occupied area and the investment cost are saved, the facultative zone, the aerobic zone and the aerobic zone are placed in one device, the reflux of mixed liquid and the reflux of sludge are achieved through circulation, the nitrification and denitrification effects and the sludge concentration in the tank body are ensured, the integration level is higher, and the occupied area and the equipment investment are saved.
2. The pollutant treatment load is higher, and the treatment effect is better, and through the design of reactor flow state and technological parameters, the magnetic powder carrier is introduced simultaneously, so that the microbial activity is stronger, and the treatment load is higher.
3. The operation cost is reduced, and the load of the required matched equipment is lower and the operation cost is reduced compared with the equipment with the same treatment capacity through the functions of internal circulation control, carrier input and the like.
4. The adaptability is wide, the process matched with the integrated reactor does not influence the front-end and rear-end processes, the integrated reactor can be effectively applied in any scene as long as the A/O process can be used, and the integrated reactor can be widely applied to domestic sewage, industrial wastewater, river and lake treatment and the like.
Drawings
FIG. 1 is a schematic system diagram of an integrated wastewater treatment reactor according to an embodiment of the present invention.
Fig. 2 is a schematic top view of an integrated wastewater treatment reactor according to an embodiment of the present invention.
FIG. 3 is a schematic view of the integrated wastewater treatment reactor according to the embodiment of the present invention.
In the figure: the system comprises a facultative zone 1, a biological selection zone 2, an aerobic zone 3, an aerobic zone 4, a water outlet weir 5, a stirrer 6, a cyclone aerator 7, a gas collecting hood 8, a magnetic powder carrier 9, a water inlet 10, a return port 11, a nitrifying liquid return port 12, a sludge return port 13, an overflow hole 14, an external compressed air pipe 15, a facultative system A and an aerobic sedimentation system B.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Examples are given.
Referring to fig. 1 to 3, it should be understood that the structures, the proportions, the sizes, etc. shown in the drawings attached to the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any modifications of the structures, changes of the proportion relation or adjustments of the sizes should still fall within the scope that the technical contents disclosed in the present invention can cover without affecting the efficacy and the achievable purpose of the present invention. Meanwhile, in the present specification, if there are terms such as "upper", "lower", "left", "right", "middle" and "one", they are used for clarity of description only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are considered as the scope of the present invention without substantial changes in the technical content.
The integrated wastewater treatment reactor in the embodiment comprises a facultative zone 1, a biological selection zone 2, an aerobic zone 3, a sedimentation zone 4, a water outlet weir 5, a stirrer 6, a cyclone aerator 7, a gas collecting hood 8, a water inlet 10, a backflow port 11, a nitrifying liquid backflow port 12, a sludge backflow port 13 and an overflowing hole 14, wherein the gas collecting hood 8 is arranged in an inverted V-shaped structure, the water outlet weir 5 is arranged in a U-shaped groove structure, and magnetic powder carriers 9 are arranged in the facultative zone 1, the biological selection zone 2, the aerobic zone 3 and the sedimentation zone 4.
In the embodiment, the water inlet 10 and the return opening 11 are both communicated with the biological selection area 2, the biological selection area 2 is communicated with the facultative zone 1, the facultative zone 1 is communicated with the aerobic zone 3, the sedimentation area 4 and the cyclone aerator 7 are both arranged in the aerobic zone 3, the sedimentation area 4 is positioned above the cyclone aerator 7, the cyclone aerator 7 is connected with an external compressed air pipe 15, and the number of the cyclone aerator 7 is 4.
In the embodiment, a stirrer 6 is respectively arranged in the facultative area 1 and the biological selection area 2, the overflowing hole 14 is arranged on the side wall of the settling area 4, and the effluent weir 5, the gas collecting hood 8, the nitrifying liquid return port 12 and the sludge return port 13 are all arranged in the settling area 4.
The effluent weir 5, the sludge return port 13, the gas collecting channel 8 and the nitrifying liquid return port 12 in the embodiment are sequentially arranged from top to bottom, the effluent weir 5 and the sludge return port 13 are arranged at the upper part of the settling zone 4, the gas collecting channel 8 and the nitrifying liquid return port 12 are arranged at the lower part of the settling zone 4, and the lower part of the settling zone 4 is in a closed-up structure.
Specifically, the facultative zone 1 and the biological selection zone 2 in the integrated wastewater treatment reactor form a facultative system A, and the aerobic zone 3 and the sedimentation zone 4 form an aerobic sedimentation system B.
1. Raw water enters a reactor through a water inlet 10, and firstly enters a facultative system A, the facultative system A is the 1 st part of the reactor, the facultative system A is divided into 2 sections, the 1 st section is a biological selection area 2, the volume of the facultative system is 30 percent of the whole facultative system, a stirrer 6 is arranged in the facultative system, and the facultative system is mainly used for fully mixing the raw water, nitrifying reflux liquid and return sludge, simultaneously enabling the mixed liquid to rapidly enter a facultative state, selecting microorganisms and avoiding the influence of dissolved oxygen in the reflux liquid and the raw water on the whole facultative system.
The section 2 is a facultative area 1, the sections 1 and 2 adopt top overflowing holes 14 for overflowing, a plug flow type stirrer 6 is arranged in the section 2 facultative area 1 to ensure that activated sludge and wastewater are fully mixed and reacted so as to achieve the effects of removing denitrification to remove total nitrogen, removing COD and the like, the bottom of the section 2 of the facultative system A and an aerobic sedimentation system B, the size of the overflowing holes 14 of the facultative system A is determined according to water quantity, and the overflowing flow rate is kept at 0.3-0.6 m/s.
2. The second part of the reactor 2 is an aerobic sedimentation system B, the wastewater enters the aerobic sedimentation system B after being treated by the facultative system A, the aerobic sedimentation system B consists of an upper part and a lower part, the lower part is an aerobic zone 3, and the upper part is a sedimentation zone 4; the bottom in good oxygen district 3 is provided with spiral-flow aerator 7, and the pond mixed liquid is got into by spiral-flow aerator 7 bottom, mixes in spiral-flow aerator 7 inside with the compressed air of external income, spouts from the top again, reaches intensive mixing, aeration oxygenation's purpose, simultaneously because of the effect of spiral-flow aerator 7 whirl injection, the inside mixed liquid of reactor keeps at rotatory circulation state to it is more abundant to make the reactor mix the effect, and shock resistance is stronger.
3. The settling zone 4 is intake all around, middle water outlet structure, the position of intaking comprises evenly distributed's discharge orifice 14, the discharge orifice 14 size is confirmed according to the treatment water yield, after the mixed liquid evenly got into settling zone 4 through discharge orifice 14, carry out the water distribution by the water distribution baffle, water distribution baffle bottom lies in the middle part of whole settling zone 4, the mixed liquid up passes through the mud-water separation zone after the water distribution of water distribution baffle, the mud in the in-process mixed liquid that rises flows out from settling zone 4 bottom after the effect of natural sedimentation deposits, backward flow to aerobic zone 3, the supernatant flows out in the middle play weir 5 in the top.
4. The bottom mud outlet of settling zone 4 is the rectangle structure, length is the same with 4 length in whole settling zone, the width is 100 ~ 500mm, mud outlet upper portion is provided with gas collecting channel 8, 200 ~ 500mm apart from mud outlet, it is triangle-shaped, the bottom opening, the end width is greater than mud outlet width 200 ~ 400mm, the top is 30 jiaos, gas collecting channel 8 links to each other with settling zone 4's lateral wall, first opening, the gaseous 4 that derives settling zone through the gas outlet of collecting channel 8 collection.
5. A nitrifying liquid return port 12 is arranged below the water outlet weir 5 of the settling zone 4 and is 100-200 mm away from the bottom of the water outlet weir 5, nitrifying liquid can be returned to an anoxic system, a sludge return port 13 is arranged above a sludge outlet of the settling zone 4 and is 100-200 mm away from the sludge outlet, and concentrated activated sludge can be returned to the anoxic system.
6. The magnetic powder carrier 9 is arranged in the reactor and can be used as a carrier of active microorganisms, and the microorganisms are attached to the magnetic powder carrier 9 to form a biological film, so that the microbial population in the system is richer, and the treatment efficiency and the stability of the system are improved.
7. And discharging the residual sludge of the reactor from a sludge discharge port, and recycling the magnetic powder carrier 9 in the discharged sludge through a magnetic powder recycling machine for reuse.
8. The volume ratio of the aerobic zone 3 to the facultative zone 1 is determined according to the quality of the treated water and is controlled to be 1: 1-3: 1.
9. The surface area of the settling zone 4 is determined according to the water quantity, the height is 3-5 m, and the surface load is not higher than 1.5m 3 /m 2 H, solid load not higher than 150kg/m 2 .d。
10. The concentration of the activated sludge in the reactor is controlled to be 2000-5000 mg/L, and the mass ratio of the concentration of the magnetic powder carrier 9 to the concentration of the activated sludge is controlled to be 1: 1-1: 2.
11. The concentration of the dissolved oxygen in the facultative zone 1 is maintained at 0.1-0.5 mg/L, and the concentration of the dissolved oxygen in the aerobic zone 3 is maintained at 2-4 mg/L.
The facultative anaerobic zone 1 and the sedimentation zone 4 are integrated in one tank body and combined with the facultative anaerobic system A to form an integral integrated reactor, a raw water inlet is the front end of the facultative anaerobic section, the raw water enters an aerobic sedimentation system B after being treated by the facultative anaerobic system A, the aerobic sedimentation system B adopts an upper and lower structure, the upper part is the sedimentation zone 4, the lower part is the aerobic zone 3, and the raw water removes most pollutants in the wastewater through the action of facultative/aerobic microorganisms, so that the wastewater is discharged after reaching the standard.
Through the structural design of the pool type, the control of the water flow state in the pool and the control of the process parameters, the treatment effect of the integrated biochemical reactor is greatly improved, the investment cost of the reactor is saved by 20-40 percent, the operation cost is saved by 10-20 percent, and the removal load of COD and total nitrogen is improved by 30-50 percent compared with the common integrated biochemical reactor.
More specifically: 1. raw water enters a reactor from a water inlet 10 at the flow rate of 10L/h, firstly enters a biological selection area 2, nitrified liquid and sludge enter the biological selection area 2 through a backflow port 11, a stirrer 6 is arranged inside the biological selection area 2, the stirring speed is 90rad/min, the raw water, the nitrified backflow liquid and the backflow sludge are fully mixed, meanwhile, mixed liquid is enabled to enter a facultative state quickly, then the mixed liquid flows into a facultative area 1, the stirrer 6 is arranged inside the facultative area 1, the stirring speed is 60rad/min, and total nitrogen and partial COD are removed through the action of facultative microorganisms in the facultative area 1.
2. The volume of the biological selection area 2 is 30L, the volume of the facultative area 1 is 60L, the overflowing flow rate is 0.3m/s, the dissolved oxygen of the biological selection area 2 is controlled to be 0.3-0.4 mg/L, and the dissolved oxygen of the facultative area 1 is controlled to be 0.1-0.2 mg/L.
3. Mixed liquor flows into the aerobic zone 3 through the flow holes 14, 4 cyclone aerators 7 are evenly arranged at the bottom of the aerobic zone 3, an external compressed air pipe 15 is connected to the middle part of the cyclone aerators 7, the mixed liquor enters from the bottom of the cyclone aerators 7 and is sprayed out from the top of the cyclone aerators 7 after being mixed with compressed air, the purposes of thorough mixing and aeration oxygenation are achieved, and ammonia nitrogen and most of COD are removed through the action of aerobic microorganisms in the aerobic zone 3.
4. The total volume of the aerobic zone 3 is 180L, the aeration rate is controlled at 60L/min, and the dissolved oxygen is controlled at 3 mg/L.
5. The mixed liquor in the aerobic zone 3 enters the sedimentation zone 4 through the overflowing holes 14 which are uniformly arranged, the size of the overflowing holes 14 is 50mm 30mm, the overflowing speed is 0.1m/s, after the mixed liquor enters the sedimentation zone 4, the sludge is precipitated through the natural sedimentation effect and flows out of the bottom of the sedimentation zone 4, the sludge flows back to the aerobic zone 3, the supernatant flows out of the middle water outlet weir 5 at the top, and the size of the water outlet weir 5 is 30 mm.
6. The bottom opening size of settling zone 4 is 200mm, and distance 200mm department is provided with gas collecting channel 8, and the bottom opening of gas collecting channel 8 is 300mm, and top contained angle is 30.
7. The bottom of the settling zone 4 is provided with a sludge return port 13 at a distance of 100mm, the concentrated sludge flows back to the anoxic system through the sludge return port 13, the return flow is 50%, the bottom 100mm of the effluent weir 5 is provided with a nitrified liquid return port 12, the nitrified liquid flows back to the anoxic system through the nitrified liquid return port 12, and the return flow is 100%.
8. The total volume of the settling zone 4 was 50L, and the surface load was 0.1m 3 /m 2 H, solid load 15 kg/m 2 .d。
9. Magnetic powder carriers 9 are arranged inside the facultative system A and the aerobic sedimentation system B of the reactor, the adding amount of the magnetic powder carriers 9 is 3000mg/L, the concentration control amount of the activated sludge is 3000mg/L, and the magnetic powder carriers and the activated sludge are combined and uniformly distributed in the facultative system A and the aerobic sedimentation system B.
10. The inside of the reactor is organically combined with activated sludge through the magnetic powder carrier 9, and pollutants such as COD, nitrogen and the like in raw water are effectively removed through the action of facultative/aerobic microorganisms, so that the standard discharge is realized.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above contents described in the present specification are merely illustrative of the structure of the present invention. All the equivalent changes or simple changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (10)
1. An integrated wastewater treatment reactor is characterized in that: including oxygen district (1), biological selection district (2), good oxygen district (3), settling zone (4), play water weir (5), mixer (6), whirl aerator (7), gas collecting channel (8), water inlet (10), backward flow mouth (11), nitrify liquid backward flow mouth (12), mud backward flow mouth (13) and cross discharge orifice (14), water inlet (10) and backward flow mouth (11) all communicate with biological selection district (2), biological selection district (2) and oxygen district (1) intercommunication of holding concurrently, oxygen district (1) and good oxygen district (3) intercommunication hold concurrently, settling zone (4) and whirl aerator (7) all set up in good oxygen district (3), respectively be provided with a mixer (6) in oxygen district (1) and biological selection district (2) hold concurrently, cross discharge orifice (14) and set up the lateral wall in settling zone (4), play water weir (5), The gas-collecting hood (8), the nitrifying liquid return port (12) and the sludge return port (13) are all arranged in the sedimentation zone (4).
2. The integrated wastewater treatment reactor of claim 1, wherein: the rotational flow aerator (7) is connected with an external compressed air pipe (15).
3. The integrated wastewater treatment reactor of claim 1, wherein: the settling zone (4) is positioned above the cyclone aerator (7).
4. The integrated wastewater treatment reactor of claim 1, wherein: the water outlet weir (5), the sludge return port (13), the gas collecting hood (8) and the nitrifying liquid return port (12) are sequentially arranged from top to bottom.
5. The integrated wastewater treatment reactor of claim 4, wherein: the effluent weir (5) and the sludge return port (13) are arranged at the upper part of the settling zone (4), and the gas-collecting hood (8) and the nitrifying liquid return port (12) are arranged at the lower part of the settling zone (4).
6. The integrated wastewater treatment reactor of claim 4, wherein: the lower part of the settling zone (4) is arranged in a closing-up structure.
7. The integrated wastewater treatment reactor of claim 1, wherein: the gas-collecting hood (8) is arranged in an inverted V-shaped structure.
8. The integrated wastewater treatment reactor of claim 1, wherein: the water outlet weir (5) is arranged in a U-shaped groove structure.
9. The integrated wastewater treatment reactor of claim 1, wherein: the number of the rotational flow aerators (7) is 4.
10. The integrated wastewater treatment reactor of claim 1, wherein: magnetic powder carriers (9) are arranged in the facultative zone (1), the biological selection zone (2), the aerobic zone (3) and the sedimentation zone (4).
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