Degradation of organic matter reactor for sewage treatment and method for degrading organic matter

Abstract

The application provides a wastewater treatment organic matter degradation reactor and a method for degrading organic matter. The organic matter degradation reactor comprises a reaction cylinder, a water inlet mechanism, a micro-oxygen aeration mechanism and a sludge screening system, wherein the sludge screening system comprises a flow guide mechanism and a first separation mechanism; the water inlet mechanism, the micro-oxygen aeration mechanism and the first separation mechanism are arranged in the reaction cylinder and sequentially distributed in a top-down direction, and the first separation mechanism has a vertical passage vertically penetrating through; the flow guide mechanism has a flow guide inlet and a flow guide outlet, the flow guide outlet is located above the first separation mechanism, and fluid in the reaction cylinder can enter the flow guide mechanism through the flow guide inlet and return to the reaction cylinder through the flow guide outlet, thereby solving the technical problems of large equipment occupation and high operation cost in the removal of pollutants such as COD5, N and P in wastewater treatment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage treatment, and in particular to a degradation organic matter reactor for sewage treatment and a degradation organic matter method. BACKGROUND

[0002] Biological treatment process is commonly used in sewage treatment plants to remove COD, N and P, and common processes include A / O, SBR, MBR, MBBR and the like, and main steps include: sewage first enters an anaerobic tank to be mixed with return sludge, P is removed under the action of phosphorus accumulating organisms, then enters an anoxic zone to remove N under the action of denitrifying bacteria; enters an aerobic tank to remove COD under the action of activated sludge, and is discharged from the system in the form of excess sludge after sedimentation. 2 However, these processes have the problems of more tanks, larger land occupation, higher operation cost and larger investment. SUMMARY

[0003] The present application aims to provide a degradation organic matter reactor for sewage treatment and a degradation organic matter method to solve the technical problems of large land occupation and high operation cost of equipment for removing pollutants such as COD, N and P in sewage treatment.

[0004] The above-mentioned object of the present application can be achieved by using the following technical solution:

[0005] The present application provides a degradation organic matter reactor for sewage treatment, comprising: a reaction cylinder, a water inlet mechanism, a micro-oxygen aeration mechanism and a sludge screening system, wherein the sludge screening system comprises a flow guide mechanism and a first separation mechanism;

[0006] The water inlet mechanism, the micro-oxygen aeration mechanism and the first separation mechanism are all arranged in the reaction cylinder and are sequentially distributed in a direction from bottom to top, and the first separation mechanism has a vertical passage vertically therethrough; the flow guide mechanism has a flow guide inlet and a flow guide outlet, the flow guide outlet is located above the first separation mechanism, and fluid in the reaction cylinder can enter the flow guide mechanism through the flow guide inlet and return to the reaction cylinder through the flow guide outlet.

[0007] In a preferred embodiment, the flow guide mechanism comprises an outer flow guide cylinder and an inner flow guide cylinder, the inner flow guide cylinder is arranged in the outer flow guide cylinder, the inner flow guide cylinder and the outer flow guide cylinder are both vertically through, a flow guide passage is arranged between the inner flow guide cylinder and the outer flow guide cylinder, an upper end of the flow guide passage is the flow guide inlet, and a lower end of the flow guide passage is the flow guide outlet; the outer flow guide cylinder is arranged in the reaction cylinder.

[0008] In a preferred embodiment, the first separation mechanism comprises a perforated plate, the vertical passage comprises a through hole arranged on the perforated plate, and the perforated plate is arranged below the outer flow guide cylinder.

[0009] In a preferred embodiment, the flow guide channel is in the shape of a cylinder, the flow guide channel comprises a constricted portion, the constricted portion is gradually constricted inwardly in a downward direction, the flow guide outlet is arranged at the lower end of the constricted portion, and the flow guide outlet is arranged inwardly.

[0010] In a preferred embodiment, the sludge screening system comprises a sludge hopper, the sludge hopper is vertically through, the upper end of the sludge hopper is connected to the lower end of the outer flow guide cylinder, and the orifice plate is arranged inside the lower end of the sludge hopper.

[0011] In a preferred embodiment, the degradation organic matter reactor comprises a sludge discharge mechanism and a sludge backflow mechanism, the sludge discharge mechanism is in communication with the sludge hopper, and the two ends of the sludge backflow mechanism are respectively connected to the sludge discharge mechanism and the water inlet mechanism.

[0012] In a preferred embodiment, a solid-liquid separator is arranged in the inner flow guide cylinder, the solid-liquid separator comprises a plurality of flow guide blocks, and the flow guide blocks are gradually reduced in a downward direction.

[0013] In a preferred embodiment, a water collecting mechanism is arranged in the inner flow guide cylinder, the water collecting mechanism is located above the solid-liquid separator, the water collecting mechanism comprises a water collecting cylinder, and the side wall of the water collecting cylinder is provided with water passing holes.

[0014] In a preferred embodiment, a flow guide weir is arranged at the top end of the outer flow guide cylinder, the top of the flow guide weir is provided with a plurality of notches serving as the flow guide inlets.

[0015] In a preferred embodiment, the water inlet mechanism comprises a water inlet pipe arranged at the bottom of the reaction cylinder, the water inlet pipe is provided with a plurality of water outlet holes, and the water outlet holes are arranged downwardly.

[0016] The present application provides a method for degrading organic matter, which adopts the degradation organic matter reactor for sewage treatment as described above.

[0017] The present application has the following characteristics and advantages:

[0018] The sewage to be treated is added into the reaction cylinder through the water inlet mechanism, the sewage gradually overflows the micro-aerobic aeration mechanism and the first separation mechanism, the oxygen-containing gas discharged by the micro-aerobic aeration mechanism is mixed into the fluid and moves upwardly with the fluid, so that an anoxic environment is formed in the area below the micro-aerobic aeration mechanism, and an oxygen-rich environment is formed between the micro-aerobic aeration mechanism and the first separation mechanism.

[0019] The part of the fluid below the first separation mechanism flows upwardly through the vertical passage; the part of the fluid in the reaction cylinder flows into the flow guide mechanism and flows out through the flow guide outlet, the fluid flowing out of the flow guide outlet interacts with the fluid flowing through the vertical through hole, and a turbulent flow is formed above the first separation mechanism.

[0020] The inoculated sludge is poured from the top of the reaction cylinder, the inoculated sludge is mixed with the fluid in the reaction cylinder, the inoculated sludge reacts with the fluid in the reaction cylinder to form granular sludge, and gradually moves to the top of the first separation mechanism, and the granular sludge with a smaller particle size is mostly retained in the top of the first separation mechanism under the action of turbulence; the granular sludge with a larger particle size can pass through the vertical channel due to its relatively large gravity, and moves to the lower part of the first separation mechanism, so that the granular sludge is screened, and the granular sludge with a larger particle size enters the oxygen-rich environment between the upper part of the micro-aerobic aeration mechanism and the first separation mechanism, and the granular sludge with a smaller particle size can continue to react in the upper part of the first separation mechanism to gradually increase the particle size.

[0021] In the oxygen-rich environment, due to the mass transfer limitation of oxygen, the granular sludge presents a condition that the outside is an aerobic zone and the inside is an anoxic or anaerobic zone, which provides suitable living environments for aerobic, facultative and anaerobic microorganisms, can effectively degrade various pollutants such as COD, N and P, and the wastewater can be input into the reaction cylinder through the water inlet mechanism in a continuous flow, and the pollutants are removed while the wastewater is input, which improves the degradation efficiency of various pollutants, and the sludge settling and removal of various organic pollutants are carried out in the same reaction cylinder, without a secondary sedimentation tank and independent anoxic / anaerobic zone, which makes the system more compact, significantly reduces the required land area, is beneficial to saving operation cost and reducing construction cost. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0023] Figure 1 The structural schematic diagram of the degradation organic matter reactor for wastewater treatment provided by the present application is shown in the figure.

[0024] Figure 2 The structural schematic diagram of the sludge screening system in the degradation organic matter reactor for wastewater treatment is shown in the figure. Figure 1 The structural schematic diagram of the sludge screening system in the degradation organic matter reactor for wastewater treatment is shown in the figure.

[0025] Figure 3 The structural schematic diagram of the flow guide weir in the degradation organic matter reactor for wastewater treatment provided by the present application is shown in the figure.

[0026] Figure 4 The sectional view of the water collecting mechanism in the degradation organic matter reactor for wastewater treatment provided by the present application is shown in the figure.

[0027] Figure 5The cross-sectional view of the water inlet pipe in the degradation organic matter reactor for sewage treatment provided by the present application is shown in the figure.

[0028] BRIEF DESCRIPTION OF DRAWINGS

[0029] 10, reaction cylinder; 11, A area; 12, B area; 13, C area;

[0030] 20, water inlet mechanism; 21, water inlet pipe; 22, water outlet hole;

[0031] 30, micro-aerated aeration mechanism;

[0032] 40, sludge screening system;

[0033] 41, flow guide mechanism; 410, flow guide channel; 411, flow guide inlet; 412, flow guide outlet;

[0034] 42, sludge hopper;

[0035] 51, outer flow guide cylinder; 52, inner flow guide cylinder; 53, contraction part; 54, flow guide weir; 541, notch;

[0036] 60, first separation mechanism; 61, vertical channel; 62, orifice plate;

[0037] 63, solid-liquid separator; 631, flow guide block;

[0038] 71, sludge discharge mechanism; 72, sludge backflow mechanism;

[0039] 80, water collection mechanism; 81, water collection cylinder; 82, water passing hole; 83, DO detector. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0041] Scheme One

[0042] The present application provides a degradation organic matter reactor for sewage treatment, as shown in the figure Figures 1-2As shown, the device comprises a reaction cylinder 10, a water inlet mechanism 20, a micro-aerobic aeration mechanism 30, and a sludge screening system 40, which comprises a flow guide mechanism 41 and a first separation mechanism 60; the water inlet mechanism 20, the micro-aerobic aeration mechanism 30, and the first separation mechanism 60 are arranged in the reaction cylinder 10 in sequence from bottom to top, and the first separation mechanism 60 has a vertical passage 61 vertically penetrating through it; the flow guide mechanism 41 has a flow guide inlet 411 and a flow guide outlet 412, and the flow guide outlet 412 is located above the first separation mechanism 60; the fluid in the reaction cylinder 10 can enter the flow guide mechanism 41 through the flow guide inlet 411 and flow back into the reaction cylinder 10 through the flow guide outlet 412.

[0043] The sewage to be treated is added into the reaction cylinder 10 through the water inlet mechanism 20, and gradually overflows the micro-aerobic aeration mechanism 30 and the first separation mechanism 60; the oxygen-containing gas discharged by the micro-aerobic aeration mechanism 30 mixes with the fluid and moves upward with the fluid, so that an anoxic environment is formed below the micro-aerobic aeration mechanism 30 and an oxygen-rich environment is formed between the micro-aerobic aeration mechanism 30 and the first separation mechanism 60.

[0044] The part of the fluid below the first separation mechanism 60 flows upward through the vertical passage 61; the part of the fluid in the reaction cylinder 10 flows into the flow guide mechanism 41 and flows out through the flow guide outlet 412, and the fluid flowing out of the flow guide outlet 412 interacts with the fluid flowing through the vertical passage, forming a turbulent flow above the first separation mechanism 60.

[0045] The inoculated sludge is poured into the reaction cylinder 10 from above, mixes with the fluid in the reaction cylinder 10, and reacts with the fluid in the reaction cylinder 10 to form granular sludge, which gradually moves downward to above the first separation mechanism 60; the granular sludge with smaller particle size stays above the first separation mechanism 60 under the action of the turbulent flow; the granular sludge with larger particle size can pass through the vertical passage 61 due to its relatively large gravity and move to below the first separation mechanism 60, thereby screening the granular sludge, allowing the granular sludge with larger particle size to enter the oxygen-rich environment between the micro-aerobic aeration mechanism 30 and the first separation mechanism 60, and allowing the granular sludge with smaller particle size to continue to react above the first separation mechanism 60 to gradually increase the particle size.

[0046] In the oxygen-rich environment, due to the mass transfer limitation of oxygen, the granular sludge presents the condition that the outside is an aerobic zone and the inside is an anoxic or anaerobic zone, which provides suitable living environments for aerobic, facultative and anaerobic microorganisms, can effectively degrade various pollutants such as COD, N, P and the like, and the sewage can be input into the reaction cylinder 10 through the inlet mechanism 20 in a continuous flow, the pollutants are removed while the sewage is input, which improves the degradation efficiency of various pollutants, and the sludge settling and the removal of various organic pollutants are carried out in the same reaction cylinder 10, without a secondary settling tank and independent anaerobic / anoxic zone, which makes the system more compact and significantly reduces the required land area, which is beneficial to save operation cost and reduce construction cost.

[0047] In an embodiment, the flow guide mechanism 41 includes an outer flow guide cylinder 51 and an inner flow guide cylinder 52, the inner flow guide cylinder 52 is arranged in the outer flow guide cylinder 51, the inner flow guide cylinder 52 and the outer flow guide cylinder 51 are vertically through, a flow guide passage 410 is arranged between the inner flow guide cylinder 52 and the outer flow guide cylinder 51, the upper end of the flow guide passage 410 is a flow guide inlet 411, and the lower end of the flow guide passage 410 is a flow guide outlet 412; the outer flow guide cylinder 51 is arranged in the reaction cylinder 10. By separating the space in the reaction cylinder 10 by the outer flow guide cylinder 51 and the inner flow guide cylinder 52, the inoculated sludge can be input into the upper end opening of the inner flow guide cylinder 52, the flow guide inlet 411 is located above or at the upper part of the outer reaction cylinder 10, the fluid in the reaction cylinder 10 flows into the flow guide passage 410 through the flow guide inlet 411, the fluid flow direction in the space of the inner flow guide cylinder 52 is generally upward, and the fluid flow direction in the flow guide passage 410 is generally downward, which is beneficial to form a turbulent flow above the first separation mechanism 60 to make the granular sludge with a smaller particle size stay above the first separation mechanism 60. As shown in Figure 1 The outer diameter of the outer flow guide cylinder 51 is less than the inner diameter of the inner reaction cylinder 10, the flow guide inlet 411 is located above or at the upper part of the outer reaction cylinder 10, the flow guide inlet 411 is lower than the top end of the reactor, and the fluid in the reactor can flow into the outer flow guide cylinder 51 through the upper part of the outer reaction cylinder 10, and the fluid flow direction outside the outer flow guide cylinder 51 is generally upward.

[0048] Further, the first separation mechanism 60 includes a perforated plate 62, the vertical passage 61 includes through holes arranged on the perforated plate 62, the perforated plate 62 is arranged below the outer flow guide cylinder 51, a region between above the perforated plate 62 and below the outer flow guide cylinder 51 forms a turbulent flow, the perforated plate 62 with the through holes can allow the fluid to pass through and can have a certain hindering effect on the particulate matter, the granular sludge is in a generally suspended state in the reaction cylinder 10, so that the granular sludge with a larger particle size can pass through the through holes on the perforated plate 62 to enter the oxygen-rich environment below due to its relatively large gravity, and the granular sludge with a smaller particle size is mostly left above the perforated plate 62.

[0049] Further, the flow guide channel 410 is in a cylindrical shape, the flow guide channel 410 comprises a converging section 53, the converging section 53 gradually converges inwardly in the downward direction, the flow guide outlet 412 is arranged at the lower end of the converging section 53, and the flow guide outlet 412 is arranged inwardly, the converging section 53 guides the fluid in the flow guide channel 410 to gradually turn and flow out from the flow guide outlet 412 in the inward direction, i.e. from the periphery to the center, which is more conducive to forming turbulent flow. Preferably, the flow guide outlet 412 is in an annular shape.

[0050] In an embodiment, the sludge screening system 40 comprises a sludge hopper 42, the sludge hopper 42 vertically penetrates, the upper end of the sludge hopper 42 is connected to the lower end of the outer flow guide cylinder 51, the perforated plate 62 is arranged inside the lower end of the sludge hopper 42, the sludge hopper 42 separates the space in the reaction cylinder 10, the granular sludge with a smaller particle size is collected in the sludge hopper 42, and the granular sludge with a larger particle size can pass through the perforated plate 62 downward after entering the sludge hopper 42.

[0051] Further, the degradation organic matter reactor comprises a sludge discharge mechanism 71 and a sludge backflow mechanism 72, the sludge discharge mechanism 71 communicates with the sludge hopper 42, and the two ends of the sludge backflow mechanism 72 are connected with the sludge discharge mechanism 71 and the water inlet mechanism 20 respectively. The invalid sludge collected in the sludge hopper 42 can be discharged through the sludge discharge mechanism 71, and part of the granular sludge can be transported to the water inlet mechanism 20 through the sludge backflow mechanism 72, so that the granular sludge is input into the anoxic environment of the reaction cylinder 10 together with the sewage, which is conducive to removing part of N and P, so as to improve the degradation efficiency of pollutants.

[0052] In an embodiment, the inner flow guide cylinder 52 is provided with a solid-liquid separator 63, the solid-liquid separator 63 comprises a plurality of flow guide blocks 631, and the flow guide blocks 631 gradually decrease in the downward direction. The fluid flow in the inner flow guide cylinder 52 is generally upward, the inoculated sludge is poured from the upper opening of the inner flow guide cylinder 52, the inoculated sludge mixes with the fluid in the inner flow guide cylinder 52, and after the inoculated sludge contacts the flow guide blocks 631, the inoculated sludge can move downward along the flow guide blocks 631 under the guidance of the flow guide blocks 631 to approach the first separation mechanism 60, so as to avoid the inoculated sludge from being difficult to move downward due to the action of the upward flowing fluid in the inner flow guide cylinder 52, and avoid the inoculated sludge from floating on the surface of the fluid, so as to realize that the fluid in the inner flow guide cylinder 52 flows generally upward, and the inoculated sludge and the particles formed by the inoculated sludge move downward.

[0053] Further, as shown in FIG. 1, the degradation organic matter reactor comprises a sludge screening system 40, the sludge screening system 40 is arranged at the lower end of the reaction cylinder 10, and the sludge screening system 40 is connected with the water inlet mechanism 20. Figure 2 and Figure 4As shown, the inner draft tube 52 is provided with a water collecting mechanism 80, which is located above the solid-liquid separator 63. The water collecting mechanism 80 comprises a water collecting cylinder 81, and the side wall of the water collecting cylinder 81 is provided with a water passing hole 82. The sewage flows upwards in the reaction cylinder 10, and after flowing into the inner draft tube 52, the pollutants are removed. The liquid level in the inner draft tube 52 is higher than the water passing hole 82, and the sewage after the removal of pollutants flows into the water collecting cylinder 81 through the water passing hole 82, so as to be outputted outward. The water passing hole 82 can be a through hole provided on the side wall of the inner draft tube 52. The water collecting cylinder 81 can be a cylinder with an open top or a rectangular cylinder, and a plurality of water collecting cylinders 81 are distributed in the inner draft tube 52. As shown, Figure 2 The water collecting cylinder 81 can also be a ring-shaped cylinder with an open top, and the ring-shaped cylinder has a ring-shaped cavity. The side wall of the ring-shaped cylinder is provided with a water passing hole 82 which communicates with the ring-shaped cavity.

[0054] In an embodiment, as shown, Figures 2-3 The top end of the outer draft tube 51 is provided with a flow guide weir 54, and the top of the flow guide weir 54 is provided with a plurality of notches 541 which serve as flow guide inlets 411. When the liquid level in the reaction cylinder 10 is higher than the notches 541, the liquid can flow into the flow guide channel 410 through the notches 541 and flow downwards along the flow guide channel 410, while the particles are blocked, so as to improve the sedimentation effect and improve the purification effect of the sewage flowing into the inner draft tube 52.

[0055] In an embodiment, the water inlet mechanism 20 comprises a water inlet pipe 21 provided at the bottom of the reaction cylinder 10. As shown, Figure 5 The water inlet pipe 21 is provided with a plurality of water outlets 22 which are downwardly arranged. The sewage inputted by the water inlet pipe 21 flows downwards to the bottom of the reaction cylinder 10, so as to prevent the accumulation of sludge at the bottom of the reactor. Preferably, the water outlets are obliquely downwardly arranged, so as to make the sewage flow obliquely downwards to the bottom of the reaction cylinder 10. More preferably, the opening direction of the water outlets is 45° to the vertical direction. In an embodiment, as shown, Figure 5 One water inlet pipe 21 is provided with two rows of water outlets which are staggered, so as to ensure that the water uniformly enters the reaction cylinder 10. The diameter of the water outlets is preferably 25 mm.

[0056] The micro-aerobic aeration mechanism 30 can be connected with a blower, so as to input air into the micro-aerobic aeration mechanism 30.

[0057] The reactor has the following advantages:

[0058] (1) All biological reactions and sedimentation processes are carried out in the reaction cylinder 10. The upper part of the reaction cylinder 10 is an aerobic zone and a sludge screening zone, and the lower part is an anaerobic zone. Therefore, a secondary sedimentation tank and independent anaerobic / anoxic zones are not needed.

[0059] (2) The reactor has less mechanical equipment than the traditional process, so the total energy consumption of the reactor is significantly reduced, and the maintenance cost of the equipment is also lower;

[0060] (3) The reactor can maximize the use of carbon sources in wastewater to remove nutrients such as N and P, reduce the use of carbon sources and phosphorus removal agents, and save the cost of agents;

[0061] (4) In the water inlet stage, the wastewater is sent into the reactor, so that the wastewater treated in the previous cycle can be replaced out of the reactor; unlike the traditional biochemical system, the reactor does not need a separate time-consuming drainage stage.

[0062] Compared with the traditional biological treatment A 2 O, SBR, MBR, MBBR COD, N, P removal process, the reactor has lower energy consumption and significantly reduced land occupation, as shown in Table 1:

[0063] A 2 O]]> SBR MBBR MBR The reactor Footprint 100％ 80％ 45％ 25％ 25％ Energy consumption 70％ 50％ 65％ 100％ 40％

[0064] Table 1: Comparison table of various treatment processes.

[0065] Compared with the traditional biological carbon removal, denitrification and phosphorus removal process, the reactor has lower energy consumption and significantly reduced land occupation.

[0066] Scheme II

[0067] The application provides a method for degrading organic matter, which adopts the above-mentioned wastewater treatment organic matter degradation reactor.

[0068] The method for degrading organic matter has all or at least part of the characteristics and beneficial effects of the above-mentioned organic matter degradation reactor, which will not be repeated here.

[0069] By using the method for degrading organic matter, part of N and P can be removed in the anoxic environment below the micro-aeration mechanism 30; in the oxygen-rich environment between the micro-aeration mechanism 30 and the first separation mechanism 60, the formed granular sludge presents the condition that the outside is an aerobic zone and the inside is an anoxic or anaerobic zone, which provides suitable living environments for aerobic, facultative and anaerobic microorganisms, and can effectively degrade various pollutants such as COD5, N and P.

[0070] The specific process of the method for degrading organic matter includes:

[0071] First, the wastewater enters the A area 11 of the reaction cylinder 10 through the water inlet mechanism 20, and the A area 11 forms an anoxic environment, which better removes part of N and P;

[0072] Secondly, air enters the reactor B zone 12 through the micro-aerobic aeration mechanism 30, the B zone 12 is an oxygen-rich zone, and the oxygen amount of the B zone 12 is controlled through the DO detector 83; appropriate inoculated sludge is put in, and appropriate mixing carbon source addition, appropriate aeration intensity, polysaccharide addition, PH, temperature and the like are controlled, and appropriate reactor operation mode is set, after a period of cultivation, granular sludge is formed, the granular sludge is granular activated sludge, the average particle size is 1mm-3mm, the region inside the inner guide cylinder 52 and above the orifice plate 62 is the C zone 13, the granular sludge with appropriate particle size after screening enters the B zone 12 from the C zone 13 through the orifice plate 62, the granular with smaller particle size is collected in the sludge hopper 42, and is discharged after a period of operation through the sludge discharge mechanism 71, and part of the sludge enters the A zone 11 through the sludge reflux mechanism 72;

[0073] Due to the oxygen mass transfer limitation, the granular activated sludge presents the condition that the outside is an aerobic zone, and the inside is an anoxic or anaerobic zone, which provides suitable living environments for aerobic, facultative and anaerobic microorganisms, and can effectively degrade COD5, N, P and various pollutants;

[0074] Finally, the treated wastewater is collected through the water collecting mechanism 80 and is discharged, and all reactions are completed in the reactor.

[0075] In the method for degrading organic matters provided by the application, after inoculated sludge is put in, microorganisms gather with each other to form a microbial aggregate with large density, large volume and good physical condition, i.e., granular sludge, in the wastewater environment of the reactor. Microorganisms have the characteristics of condensation or adhesion to solid surfaces, and this phenomenon will naturally occur as long as the conditions are appropriate. Compared with common flocculent activated sludge, granular sludge has some outstanding advantages:

[0076] (1) The appearance is regular, smooth spherical or quasi-spherical shape, the boundary is clear, and the structure is dense and strong, so the sludge is not easy to be broken and lost due to water flow shearing and internal gas pressure;

[0077] (2) The granular sludge has excellent settling performance, so that a higher concentration of sludge can be intercepted in the system, thereby promoting the increase of the treatment water amount, the improvement of the treatment effect and the improvement of the solid-liquid separation effect;

[0078] (3) The granular sludge has dense structure and large particle size, and due to the existence of mass transfer limitation, a relatively stable microenvironment can be maintained in the granular interior, so the granular sludge has high tolerance to impact load, toxic organic substances and heavy metals;

[0079] (4) has the ability to degrade refractory pollutants, the complete degradation of refractory pollutants involves the interaction of multiple bacterial populations, and the granular sludge is a micro-ecosystem in which multiple microorganisms coexist, which means that the transmission of pollutants in the granular sludge is fast and highly concentrated, so that a large amount of pollutants can be treated in a compact system;

[0080] (5) Synchronization of nitrification, denitrification and biological phosphorus removal: The granular sludge has a spherical layered structure, and the outer side mainly attaches nitrifying bacteria and nitrosifying bacteria, which convert ammonia nitrogen into nitrite and nitrate, and then transmit to the inside of the granular sludge. At the same time, as oxygen is utilized by external bacteria, an anoxic zone is formed inside the granular sludge, which contains denitrifying bacteria that remove the incoming nitrite and nitrate nitrogen by denitrification, and the phosphorus removal effect is also enhanced by this structure;

[0081] The method for degrading organic matter has the advantages that the reactor degrades organic matter by granular sludge, which can solve the problem of land occupation, because the reactor can achieve high biomass concentration (8-15 g / L) and form low sludge index and high settling velocity of granular sludge, so the required biological reactor volume is greatly reduced; sludge settling and removal of COD, N, P and other pollutants can be carried out in the same reactor, without the need for a secondary settling tank and independent anaerobic / anoxic zone, which makes the system more compact and significantly reduces the required land area; the operation cost is low, because all biological reactions and settling processes occur in one reactor, so fewer mechanical devices are required; compared with traditional denitrification and phosphorus removal processes, the total energy consumption of the reactor is significantly reduced due to the reduction of mechanical devices, and the maintenance cost of the equipment is also lower; in addition, the reactor can maximize the use of carbon sources in wastewater for N, P and other nutrient removal, reducing the use of carbon sources and phosphorus removal agents, saving the cost of agents; the investment is saved, because the reactor structure is compact and simple, the land area is small, the system requires fewer mechanical devices, and the investment in the reactor is lower; the degree of automation is high, the online instrument data is automatically controlled, the air volume of the fan is accurately aerated, the running time is controlled to ensure the effluent effect, and the amount of agents is automatically calculated to control the addition. Through automatic control, the operation cost is reduced.

[0082] The above only describes several embodiments of the present application, and those skilled in the art can make various modifications or changes to the embodiments of the present application according to the content disclosed in the application file without departing from the spirit and scope of the present application.

Claims

1. A degrading organic matter reactor for sewage treatment, characterized by, The degradation organic matter reactor for sewage treatment comprises a reaction cylinder, a water inlet mechanism, a micro-aeration mechanism and a sludge screening system, wherein the sludge screening system comprises a flow guide mechanism and a first separation mechanism. The water inlet mechanism, the micro-aeration mechanism and the first separation mechanism are arranged in the reaction cylinder in sequence from bottom to top, and the first separation mechanism has a vertical passage vertically penetrating through the first separation mechanism; the flow guide mechanism has a flow guide inlet and a flow guide outlet, and the flow guide outlet is located above the first separation mechanism, so that the fluid in the reaction cylinder can enter the flow guide mechanism through the flow guide inlet and flow back into the reaction cylinder through the flow guide outlet. The flow guide mechanism comprises an outer flow guide cylinder and an inner flow guide cylinder, the inner flow guide cylinder is arranged in the outer flow guide cylinder, and the inner flow guide cylinder and the outer flow guide cylinder both vertically penetrate through the flow guide mechanism; a flow guide passage is arranged between the inner flow guide cylinder and the outer flow guide cylinder, the upper end of the flow guide passage is the flow guide inlet, and the lower end of the flow guide passage is the flow guide outlet; the outer flow guide cylinder is arranged in the reaction cylinder. The first separation mechanism comprises a hole plate, and the vertical passage comprises a through hole arranged on the hole plate; the hole plate is arranged below the outer flow guide cylinder. The inner flow guide cylinder is provided with a solid-liquid separator, and the solid-liquid separator comprises a plurality of flow guide blocks which gradually decrease in size in the downward direction. The water inlet mechanism comprises a water inlet pipe arranged at the bottom of the reaction cylinder, and the water inlet pipe is provided with a plurality of water outlet holes arranged downward.

2. The degradation organic matter reactor for sewage treatment according to claim 1, wherein the flow guide passage is in the shape of a cylinder, the flow guide passage comprises a contraction portion which gradually contracts inward in the downward direction, the flow guide outlet is arranged at the lower end of the contraction portion, and the flow guide outlet is arranged inward.

3. The degradation organic matter reactor for sewage treatment according to claim 1, wherein the sludge screening system comprises a sludge hopper which vertically penetrates through the sludge screening system, the upper end of the sludge hopper is connected to the lower end of the outer flow guide cylinder, and the hole plate is arranged on the inner side of the lower end of the sludge hopper.

4. The degradation organic matter reactor for sewage treatment according to claim 3, wherein the degradation organic matter reactor comprises a sludge discharge mechanism and a sludge reflux mechanism, the sludge discharge mechanism is in communication with the sludge hopper, and the two ends of the sludge reflux mechanism are connected to the sludge discharge mechanism and the water inlet mechanism respectively.

5. The degradation organic matter reactor for sewage treatment according to claim 1, wherein the inner flow guide cylinder is provided with a water collecting mechanism, the water collecting mechanism is located above the solid-liquid separator, and the water collecting mechanism comprises a water collecting cylinder, and the side wall of the water collecting cylinder is provided with a water passing hole.

6. The degradation organic matter reactor for sewage treatment according to claim 1, wherein the top end of the outer flow guide cylinder is provided with a flow guide weir, and the top of the flow guide weir is provided with a plurality of notches serving as the flow guide inlet. The degradation organic matter reactor for sewage treatment according to any one of claims 1-6. ​ ​ ​ ​ ​ 7. A method of degrading an organic material, characterized by, ​

Images