Reaction device for treating wastewater with high ammonia nitrogen and low carbon nitrogen ratio

Abstract

The utility model provides a reaction device for treating high-ammonia-nitrogen low-carbon-nitrogen-ratio wastewater, which relates to the technical field of denitrification and carbon reduction processes, and is characterized in that hydrolysis acidification florae are enriched through a hydrolysis acidifier, so that macromolecular organic matters which are chronic and difficult to degrade in the wastewater are converted into micromolecular volatile fatty acids; the biochemical performance of the wastewater after hydrolytic acidification is obviously improved, an available substrate is provided for subsequent short-cut denitrification flora, the additional carbon source adding amount is effectively saved, a filler frame is arranged in the short-cut denitrification / anaerobic ammonia oxidation reactor, a filler string is hung on the filler frame and is used for growing an anaerobic ammonia oxidation biological membrane, and the anaerobic ammonia oxidation biological membrane is used for treating the anaerobic ammonia oxidation biological membrane in the short-cut denitrification / anaerobic ammonia oxidation reactor. The anaerobic ammonium oxidation bacteria consume nitrite generated by the short-cut denitrifying bacteria to complete denitrification, the hydrolysis acidifier is communicated with the short-cut denitrification / anaerobic ammonium oxidation reactor, and the hydrolysis acidifier provides required volatile fatty acid for the short-cut denitrification / anaerobic ammonium oxidation reactor; a short-cut denitrification reaction and an anaerobic ammonia oxidation reaction are performed in the short-cut denitrification / anaerobic ammonia oxidation reactor, so that nitrate and ammonia nitrogen are synchronously removed, and finally, low-consumption nitrogen and carbon removal of the wastewater with high ammonia nitrogen and low carbon nitrogen ratio can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of denitrification technology, in particular to a reaction device for treating wastewater with high ammonia nitrogen and low carbon-nitrogen ratio. Background Art

[0002] Traditional nitrification and denitrification biological denitrification technologies for wastewater treatment primarily rely on nitrifying bacteria to convert ammonia nitrogen into nitrates, and denitrifying bacteria to reduce it to nitrogen gas. This technology requires a relatively balanced carbon-nitrogen ratio in the wastewater to meet the basic conditions for biological reactions and achieve optimal denitrification results. However, with urbanization and improved living standards, the water quality characteristics of urban sewage treatment plants have changed significantly. Increased ammonia nitrogen concentrations in the water have resulted in lower carbon-nitrogen ratios, posing new challenges to existing denitrification processes.

[0003] In order to adapt to this change, improve treatment efficiency and reduce energy consumption, it is urgent to develop new denitrification processes. As an emerging denitrification technology, anaerobic ammonium oxidation has attracted widespread attention due to its unique advantages. The anaerobic ammonium oxidation process uses nitrite as an electron acceptor to convert ammonia nitrogen into nitrogen gas. This process not only avoids the large amount of oxygen consumption required in the traditional nitrification process, but also avoids the large amount of carbon source input in the denitrification process. However, the single anaerobic ammonium oxidation process is not ideal for total nitrogen removal when treating actual wastewater, so it needs to be coupled with other biological processes to achieve better denitrification performance. Utility Model Content

[0004] The purpose of the utility model is to provide a reaction device for treating high-ammonia nitrogen and low-carbon-nitrogen ratio wastewater, so as to alleviate the technical problem that the single anaerobic ammonia oxidation process in the prior art has an unsatisfactory total nitrogen removal effect when treating actual wastewater.

[0005] The reaction device for treating high-ammonia nitrogen and low-carbon-nitrogen ratio wastewater provided by the utility model comprises: a hydrolysis acidifier and a short-cut denitrification / anaerobic ammonium oxidation reactor;

[0006] The hydrolysis acidifier can be fed with anaerobic granular sludge, and wastewater with high ammonia nitrogen and low carbon-nitrogen ratio containing biodegradable carbon sources can enter the hydrolysis acidifier, and the hydrolysis acidifier is configured to enable microbial degradation of the biodegradable carbon source and produce volatile fatty acids;

[0007] The short-cut denitrification / anaerobic ammonium oxidation reactor is in communication with the hydrolysis acidification device, and the supernatant containing volatile fatty acids in the hydrolysis acidification device can enter the short-cut denitrification / anaerobic ammonium oxidation reactor;

[0008] The short-cut denitrification / anaerobic ammonium oxidation reactor can be fed with denitrification sludge. A packing rack is fixedly arranged in the short-cut denitrification / anaerobic ammonium oxidation reactor, and a packing string is suspended on the packing rack. The packing string is used to grow an anaerobic ammonium oxidation biofilm to form a short-cut denitrification reaction and an anaerobic ammonium oxidation reaction.

[0009] In an alternative embodiment,

[0010] The hydrolysis acidifier includes a hydrolysis acidification tank;

[0011] The hydrolysis and acidification tank is configured as a sealed structure, the bottom area of ​​the cavity in the hydrolysis and acidification tank is a first sludge precipitation area, and the top area of ​​the cavity in the hydrolysis and acidification tank is a first gas collection area.

[0012] In an alternative embodiment,

[0013] The hydrolysis acidifier further includes a first agitator;

[0014] The first stirrer is connected to a first stirring rod, and one end of the first stirring rod extending into the hydrolysis acidification tank is provided with a first stirring blade.

[0015] In an alternative embodiment,

[0016] First heating wires are evenly arranged on the outside of the hydrolysis and acidification tank. A first temperature probe is provided at one end of the first heating wire close to the port of the hydrolysis and acidification tank. A first thermostat is provided at one end of the first heating wire away from the first temperature probe. The first thermostat is connected to a first leakage protector.

[0017] In an alternative embodiment,

[0018] The hydrolysis and acidification tank is provided with a first water outlet, which is connected to the short-cut denitrification / anaerobic ammonium oxidation reactor through a water outlet pump, so that the supernatant containing volatile fatty acids in the hydrolysis and acidification tank can enter the short-cut denitrification / anaerobic ammonium oxidation reactor;

[0019] A filter is provided in the first water outlet;

[0020] The bottom of the hydrolysis and acidification tank is provided with a first mud discharge port, and the sludge in the first sludge sedimentation area is discharged through the first mud discharge port;

[0021] The hydrolysis and acidification tank is provided with a first manual inspection port;

[0022] The hydrolysis and acidification tank is provided with a first exhaust port, which is connected to the tail gas absorption component through a pipeline;

[0023] The hydrolysis and acidification tank is provided with a first water inlet, which is connected to a first water inlet pump through a pipeline.

[0024] In an alternative embodiment,

[0025] The short-cut denitrification / anaerobic ammonium oxidation reactor comprises a short-cut denitrification / anaerobic ammonium oxidation reaction tank;

[0026] The short-cut denitrification / anaerobic ammonium oxidation reaction tank is configured as a sealed structure, the bottom area of ​​the cavity in the short-cut denitrification / anaerobic ammonium oxidation reaction tank is a second sludge precipitation area, and the top area of ​​the cavity in the short-cut denitrification / anaerobic ammonium oxidation reaction tank is a second gas collection area;

[0027] A packing area is located between the second sludge settling area and the second gas collecting area, and the packing rack and the packing string are both located in the packing area.

[0028] In an alternative embodiment,

[0029] The short-cut denitrification / anaerobic ammonium oxidation reactor further includes a second agitator;

[0030] The second stirrer is connected to a second stirring rod, and one end of the second stirring rod extending into the short-range denitrification / anaerobic ammonium oxidation reaction tank is provided with a second stirring blade.

[0031] In an alternative embodiment,

[0032] Second heating wires are evenly arranged on the outside of the short-range denitrification / anaerobic ammonium oxidation reaction tank, a second temperature probe is provided at one end of the second heating wire close to the port of the short-range denitrification / anaerobic ammonium oxidation reaction tank, a second thermostat is provided at one end of the second heating wire away from the second temperature probe, and the second thermostat is connected to a second leakage protector.

[0033] In an alternative embodiment,

[0034] The short-cut denitrification / anaerobic ammonium oxidation reaction tank is provided with a second water outlet, which is connected to a water outlet solenoid valve through a pipeline. When the water outlet solenoid valve is opened, the liquid in the short-cut denitrification / anaerobic ammonium oxidation reaction tank is discharged through the second water outlet;

[0035] The short-cut denitrification / anaerobic ammonium oxidation reaction tank is further provided with a first sampling port and a second sampling port, wherein the first sampling port is located above the second water outlet, and the second sampling port is located below the second water outlet;

[0036] A second mud discharge port is provided at the bottom of the short-cut denitrification / anaerobic ammonium oxidation reaction tank, and the sludge in the second sludge sedimentation area is discharged through the second mud discharge port;

[0037] The short-cut denitrification / anaerobic ammonium oxidation reaction tank is provided with a second manual inspection port;

[0038] The short-cut denitrification / anaerobic ammonium oxidation reaction tank is provided with a second exhaust port;

[0039] The short-cut denitrification / anaerobic ammonium oxidation reaction tank is provided with a second water inlet, which is connected to a second water inlet pump through a pipeline, and the second water inlet pump is connected to the water outlet pump.

[0040] In an alternative embodiment,

[0041] The reaction device for treating wastewater with high ammonia nitrogen and low carbon-nitrogen ratio also includes a first controller and a second controller;

[0042] The first controller is used to control the opening and closing of the first agitator, the first water inlet pump and the water outlet pump;

[0043] The second controller is used to control the opening and closing of the second agitator, the second water inlet pump and the water outlet solenoid valve.

[0044] The utility model provides a reaction device for treating wastewater with high ammonia nitrogen and low carbon-nitrogen ratio. The hydrolysis acidifier realizes the enrichment of hydrolysis acidification bacteria group through the hydrolysis acidifier, converts the chronic and refractory macromolecular organic matter in the wastewater into small molecular volatile fatty acids. The biodegradability of the wastewater after hydrolysis and acidification is significantly improved, and a usable substrate is provided for the subsequent short-range denitrification bacteria group, effectively saving the amount of additional carbon source addition. A packing rack is provided inside the short-range denitrification / anaerobic ammonium oxidation reactor, and a packing string is suspended on the packing rack for growing anaerobic ammonium oxidation biofilm. The anaerobic ammonium oxidation bacteria consume nitrite produced by the short-range denitrification bacteria to complete denitrification. The hydrolysis acidifier is connected to the short-range denitrification / anaerobic ammonium oxidation reactor. The hydrolysis acidifier provides the required volatile fatty acids for the short-range denitrification / anaerobic ammonium oxidation reactor. Short-range denitrification reaction and anaerobic ammonium oxidation reaction are carried out in the short-range denitrification / anaerobic ammonium oxidation reactor to realize the simultaneous removal of nitrate and ammonia nitrogen, and ultimately realize low-consumption denitrification and carbon removal of wastewater with high ammonia nitrogen and low carbon-nitrogen ratio. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0046] Figure 1A schematic diagram of the overall structure of a reaction device for treating high-ammonia-nitrogen and low-carbon-nitrogen ratio wastewater provided by an embodiment of the present utility model;

[0047] Figure 2 A cross-sectional view of the structure of a packing rack in a reaction device for treating wastewater with high ammonia nitrogen and low carbon-nitrogen ratio provided by an embodiment of the present utility model;

[0048] Figure 3 A cross-sectional view of the structure of a packing string in a reaction device for treating high-ammonia-nitrogen and low-carbon-nitrogen ratio wastewater provided by an embodiment of the present utility model;

[0049] Figure 4 This is a schematic structural diagram of a filter in a reaction device for treating high-ammonia-nitrogen and low-carbon-nitrogen ratio wastewater provided in an embodiment of the present invention.

[0050] Icons: 1-Second agitator; 2-First agitator; 3-Second stirring rod; 4-First stirring rod; 5-Second stirring blade; 6-First stirring blade; 7-Second temperature probe; 8-First temperature probe; 9-Second heating wire; 10-First heating wire; 11-Second thermostat; 12-First thermostat; 13-Second leakage protector; 14-First leakage protector; 15-Short-range denitrification / anaerobic ammonium oxidation reactor; 16-Hydrolysis and acidification tank; 17-Padding area; 18-Second gas collection area; 19-First gas collection area; 20-Second sludge sedimentation area; 21-First sludge Sedimentation area; 22-second exhaust port; 23-first exhaust port; 24-second mud discharge port; 25-first mud discharge port; 26-second manual inspection port; 27-first manual inspection port; 28-second water inlet; 29-first water inlet; 30-second water outlet; 31-first water outlet; 32-second water inlet pump; 33-first water inlet pump; 34-water outlet solenoid valve; 35-water outlet pump; 36-first sampling port; 37-second sampling port; 38-second controller; 39-first controller; 40-exhaust gas absorption component; 41-filter; 42-packing string; 43-packing rack. DETAILED DESCRIPTION

[0051] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0052] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0054] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0055] like Figure 1 As shown, the reaction device for treating high-ammonia-nitrogen and low-carbon-nitrogen ratio wastewater provided in this embodiment includes: a hydrolysis acidifier and a short-cut denitrification / anaerobic ammonium oxidation reactor; the hydrolysis acidifier can be fed with anaerobic granular sludge, and the high-ammonia-nitrogen and low-carbon-nitrogen ratio wastewater containing a biodegradable carbon source can enter the hydrolysis acidifier, and the hydrolysis acidifier is configured to be able to microbially degrade the biodegradable carbon source and produce volatile fatty acids; the short-cut denitrification / anaerobic ammonium oxidation reactor is connected to the hydrolysis acidifier, and the supernatant containing volatile fatty acids in the hydrolysis acidifier can enter the short-cut denitrification / anaerobic ammonium oxidation reactor; the short-cut denitrification / anaerobic ammonium oxidation reactor can be fed with denitrification sludge, such as Figure 2 、 Figure 3 As shown, a filler rack 43 is fixedly provided in the short-cut denitrification / anaerobic ammonium oxidation reactor, and a filler string 42 is suspended from the filler rack 43. The filler string 42 is used to grow an anaerobic ammonium oxidation biofilm to form a short-cut denitrification reaction and an anaerobic ammonium oxidation reaction.

[0056] The reaction device provided in this embodiment for treating high-ammonia nitrogen and low-carbon-nitrogen ratio wastewater uses a hydrolysis and acidification device to enrich the hydrolysis and acidification bacteria community, converting the chronic and refractory macromolecular organic matter in the wastewater into small-molecule volatile fatty acids. The biodegradability of the wastewater after hydrolysis and acidification is significantly improved, providing a usable substrate for the subsequent short-cut denitrification bacteria community, effectively saving the amount of additional carbon source added. A packing rack 43 is provided inside the short-cut denitrification / anaerobic ammonium oxidation reactor, and a packing string 42 is suspended from the packing rack 43 for growing an anaerobic ammonium oxidation biofilm. The hydrolysis and acidification device is connected to the short-cut denitrification / anaerobic ammonium oxidation reactor. The hydrolysis and acidification device provides the required volatile fatty acids to the short-cut denitrification / anaerobic ammonium oxidation reactor. Short-cut denitrification and anaerobic ammonium oxidation reactions are carried out in the hydrolysis and acidification device to achieve simultaneous removal of nitrate and ammonia nitrogen, ultimately achieving low-cost denitrification and carbon removal of high-ammonia nitrogen and low-carbon-nitrogen ratio wastewater.

[0057] Regarding the structure and shape of the hydrolysis acidifier, specifically:

[0058] The hydrolysis acidifier includes a hydrolysis acidification tank 16, which is a sealed structure. The material of the hydrolysis acidification tank 16 is high-density polyethylene. The bottom area of ​​the cavity in the hydrolysis acidification tank 16 is a first sludge sedimentation area 21, and the top area of ​​the cavity in the hydrolysis acidification tank 16 is a first gas collection area 19. The upper part of the hydrolysis acidification tank 16 is provided with a first exhaust port 23 for discharging hydrogen, methane and sulfur-containing gas; the outside of the hydrolysis acidification tank 16 is evenly arranged with a first heating wire 10, and the first heating wire 10 is provided with a first temperature probe 8 close to the port of the hydrolysis acidification tank 16, and the other end away from the port of the hydrolysis acidification tank 16 is connected to a first thermostat 12, and the inlet end of the first thermostat 12 is connected to a first leakage protector 14.

[0059] The first stirrer 2 is installed on the upper part of the hydrolysis acidification tank 16, the first stirrer 2 is connected to the first stirring rod 4, the first stirring rod 4 is connected to the cross-shaped first stirring blade 6, the first stirring rod 4 and the first stirring blade 6 are made of polytetrafluoroethylene, the hydrolysis acidification tank 16 is provided with a first water outlet 31 close to the cylinder wall, and the first water outlet 31 is provided with a filter 41. Figure 4 As shown, the filter 41 is specifically configured as a bottom suction copper head 30-mesh stainless steel mesh filter 41.

[0060] The first exhaust port 23 is connected to the tail gas absorption component 40 through a pipeline. The tail gas absorption component 40 is composed of a washing bottle, a sealing rubber stopper and a right-angle catheter. The absorption liquid is a 2%-3% sodium carbonate solution. Since the tail gas absorption component 40 is an existing structure, the specific structure of the tail gas absorption component 40 will not be described in detail here.

[0061] The external pipeline is connected to the first water inlet 29 through the first water inlet pump 33. The first agitator 2 is used to stir the anaerobic granular sludge inside the hydrolysis acidification tank 16 so that the sludge maintains a fluidized state with good mass transfer. The temperature of the hydrolysis acidification tank 16 is transmitted to the first temperature controller 12 in real time through the first temperature probe 8 on the surface of the hydrolysis acidification tank 16. The first temperature controller 12 is used to control the temperature of the first heating line 10 to ensure that the inside of the hydrolysis acidification tank 16 reaches a medium temperature environment of 35°C. Hydrogen, methane and sulfur-containing gases are collected in the first gas collection area 19, discharged from the first exhaust port 23 above the hydrolysis acidification tank 16, and discharged through the pipeline. into the tail gas absorption component 40; the first water outlet 31 is connected to the second water inlet 28 of the short-range denitrification / anaerobic ammonium oxidation reaction tank 15 by a pipeline, and is used to discharge the supernatant treated by the hydrolysis acidification tank 16 into the denitrification short-range denitrification / anaerobic ammonium oxidation reaction tank 15; the first mud discharge port 25 is used to manually discharge the residual sludge in the hydrolysis acidification tank 16 to the residual sludge collection bucket on a regular basis, and the first mud discharge port 25 is in a normally closed state; the water inlet, stirring and drainage are controlled by the first controller 39, and the first controller 39 can be set to a travel switch or a control button. The specific structure of the first controller 39 is selected according to actual conditions.

[0062] Regarding the structure and shape of the short-cut denitrification / anaerobic ammonium oxidation reactor, specifically:

[0063] The short-cut denitrification / anaerobic ammonium oxidation reactor includes a short-cut denitrification / anaerobic ammonium oxidation reaction tank 15, which is an integrated sealed structure. The bottom area of ​​the cavity in the short-cut denitrification / anaerobic ammonium oxidation reaction tank 15 is the second sludge sedimentation area 20, and the top area of ​​the cavity in the short-cut denitrification / anaerobic ammonium oxidation reaction tank 15 is the second gas collection area 18; between the second sludge sedimentation area 20 and the second gas collection area 18 is the packing area 17, and the packing rack 43 and the packing string 42 are both located in the packing area 17. There are multiple packing strings 42, and multiple packing strings 42 are all hung on the packing rack 43. The packing string 42 is composed of a stainless steel soft wire with a diameter of 1.2 mm, a hard plastic tube with a diameter × length of 4 mm × 160 mm, and a 19-hole K3 type packing, and the packing material is high-density polyethylene.

[0064] A second exhaust port 22 is provided on the top of the short-cut denitrification / anaerobic ammonium oxidation reaction tank 15 . A first sampling port 36 and a second sampling port 37 are provided on the top and bottom of the short-cut denitrification / anaerobic ammonium oxidation reaction tank 15 . The first sampling port 36 and the second sampling port 37 are respectively connected to ball valves.

[0065] Second heating wires 9 are evenly arranged on the outside of the short-range denitrification / anaerobic ammonium oxidation reaction tank 15. A second temperature probe 7 is provided close to the port of the short-range denitrification / anaerobic ammonium oxidation reaction tank 15, and the other end of the second heating wire 9 is connected to a second thermostat 11 away from the port of the short-range denitrification / anaerobic ammonium oxidation reaction tank 15. The inlet end of the second thermostat 11 is connected to a second leakage protector 13; a second agitator 1 is installed on the upper part of the short-range denitrification / anaerobic ammonium oxidation reaction tank 15, and the second agitator 1 is connected to a second stirring rod 3. The second stirring rod 3 extends into the interior of the short-range denitrification / anaerobic ammonium oxidation reaction tank 15 and is provided with a cross-shaped second stirring blade 5. The second stirring rod 3 and the second stirring blade 5 are made of polytetrafluoroethylene. The short-range denitrification / anaerobic ammonium oxidation reaction tank 15 is provided with a second water outlet 30, and the second water outlet 30 port is also provided with a filter 41.

[0066] The second water inlet 28 on the short-cut denitrification / anaerobic ammonium oxidation reaction tank 15 is used to connect the water outlet of the hydrolysis acidification tank 16. The second agitator 1 is used to stir the short-cut denitrification sludge inside the short-cut denitrification / anaerobic ammonium oxidation reaction tank 15 so that the sludge maintains a fluidized state with good mass transfer. The second stirring blade 5 is placed at the bottom of the short-cut denitrification / anaerobic ammonium oxidation reaction tank 15 to provide an upward water flow shear force for the sludge, thereby reducing the direct scouring of the water flow on the carrier so as to enrich the functional bacteria on the carrier. The second water outlet 30 is connected to the waste liquid collection tank by a pipeline. The water outlet solenoid valve 34 is normally closed and is controlled by a second controller 38. The temperature of the short-cut denitrification / anaerobic ammonium oxidation reactor 15 is transmitted in real time to the second thermostat 11 via a second temperature probe 7 on the reactor surface. The second thermostat 11 controls the temperature of the second heating wire 9 to ensure a 30°C ambient temperature inside the short-cut denitrification / anaerobic ammonium oxidation reactor 15. The second sludge outlet 24 regularly discharges excess sludge from the short-cut denitrification / anaerobic ammonium oxidation reactor 15 to the excess sludge collection bucket. The second controller 38 controls the water inlet, agitation, and drainage stages of the short-cut denitrification / anaerobic ammonium oxidation reactor 15. The second controller 38 and the first controller 39 can be configured to have the same structure.

[0067] It should be noted that the outlet pump 35 and the second inlet pump 32 are connected to each other, and the outlet pump 35 and the second inlet pump 32 can also be set as an integrated structure. The supernatant in the hydrolysis acidification tank 16 enters the short-range denitrification / anaerobic ammonium oxidation reaction tank 15 through the outlet pump 35 and the second inlet pump 32.

[0068] The working process of this utility model is:

[0069] Anaerobic granular sludge is manually added through the first manual inspection port 27, and the high-ammonia nitrogen and low-carbon-nitrogen ratio wastewater containing slowly biodegradable carbon sources enters the hydrolysis and acidification tank 16 from the first water inlet 29 through the first water inlet pump 33; the first temperature probe 8 on the surface of the hydrolysis and acidification tank 16 is used to monitor the temperature inside the tank in real time and transmit it to the first temperature controller 12, and the temperature of the first heating wire 10 is set to 35°C through the first temperature controller 12 to maintain the reaction temperature inside the hydrolysis and acidification tank 16, and adjust the first stirring The rotation speed of the device 2 is such that the anaerobic granular sludge inside the tank body just maintains a fluidized state with good mass transfer; after the microorganisms inside the hydrolysis and acidification tank 16 degrade most of the slowly biodegradable carbon sources and produce volatile fatty acids, the generated hydrogen, methane and sulfur-containing gases are first collected in the first gas collection area 19 of the tank body, and then enter the tail gas absorption component 40 through the pipeline from the first exhaust port 23 at the top of the tank body; the residual sludge in the hydrolysis and acidification tank 16 is manually discharged to the residual sludge collection bucket through the first mud discharge port 25 on a regular basis.

[0070] Denitrification sludge from the landfill biochemical pool is added to the short-cut denitrification / anaerobic ammonium oxidation reactor 15 through the second manual inspection port 26, a circular guide rail-shaped filler rack 43 is installed in the reactor filler area 17, and a filler string 42 with good anaerobic ammonium oxidation biofilm growth is fixed on the filler rack 43; the supernatant containing volatile fatty acids in the hydrolysis acidification tank 16 passes through the first water outlet 31, and then passes through the second water inlet 28 into the short-cut denitrification / anaerobic ammonium oxidation reactor 15; the second temperature probe 7 on the surface of the short-cut denitrification / anaerobic ammonium oxidation reactor 15 is used to monitor the temperature in the reactor in real time and transmit it to the second temperature controller 11, and the temperature of the second heating line 9 is set to 30°C through the second temperature controller 11 to keep the micro-temperature inside the short-cut denitrification / anaerobic ammonium oxidation reactor 15 The optimum temperature for biological growth is set, and the speed of the second agitator 1 is adjusted so that the denitrification sludge inside the tank body just maintains a fluidized state with good mass transfer, while minimizing the scouring of the carrier surface by the shear force of the water flow; the generated nitrogen is first collected in the second gas collection area 18 at the upper part of the reactor, and then escapes from the second exhaust port 22 at the upper part of the reactor; the supernatant treated by the short-cut denitrification / anaerobic ammonium oxidation reactor 15 is discharged from the second water outlet 30 of the reactor to the final water outlet bucket by gravity to monitor the concentration of effluent pollutants. The drainage ratio of the short-cut denitrification / anaerobic ammonium oxidation reactor 15 is 55%, and the water outlet solenoid valve 34 on the outlet pipe is controlled by the second controller 38 to complete the drainage stage; the short-cut denitrification excess sludge generated by the short-cut denitrification / anaerobic ammonium oxidation reactor 15 is manually discharged to the excess sludge collection bucket through the second mud outlet 24 on a regular basis.

[0071] The utility model is aimed at treating wastewater with high ammonia nitrogen, low carbon-nitrogen ratio and poor biodegradability. The pre-hydrolysis acidifier at the front end of the hydrolysis acidification can realize the enrichment of the hydrolysis acidification bacteria group. By reasonably regulating the hydraulic retention time, the chronic and difficult-to-degrade macromolecular organic matter in the wastewater is converted into small-molecule volatile fatty acids. The biodegradability of the wastewater after hydrolysis and acidification is significantly improved, providing a usable substrate for the subsequent short-range denitrification bacteria group, effectively saving the additional carbon source dosage, and increasing the adaptability and flexibility of the subsequent biological treatment system; in the short-range denitrification / anaerobic ammonia oxidation In the reactor, the short-cut denitrifying bacteria can rapidly consume organic matter, providing a stable supply of nitrite substrate for the anaerobic ammonium oxidizing bacteria. The sludge-film symbiotic system composed of short-cut denitrifying sludge and anaerobic ammonium oxidizing biofilm can solve the problem of different sludge ages between the two, increasing the biomass retention of anaerobic ammonium oxidizing bacteria. The unique layered structure of the biofilm can also effectively avoid competition between heterotrophic short-cut denitrifying bacteria and autotrophic anaerobic ammonium oxidizing bacteria, establishing a good cooperation between the short-cut denitrifying and anaerobic ammonium oxidizing bacteria in a single biofilm reactor, and achieving a virtuous cycle of the denitrification process. Therefore, it is possible to achieve economical and efficient denitrification and carbon removal for wastewater with high ammonia nitrogen and low carbon-to-nitrogen ratio.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A reaction device for treating high ammonia nitrogen and low carbon nitrogen ratio wastewater, characterized in that: include: Hydrolysis acidifier and short-cut denitrification / anaerobic ammonium oxidation reactor; The hydrolysis acidifier can be fed with anaerobic granular sludge, and wastewater with high ammonia nitrogen and low carbon-nitrogen ratio containing biodegradable carbon sources can enter the hydrolysis acidifier, and the hydrolysis acidifier is configured to enable microbial degradation of the biodegradable carbon source and produce volatile fatty acids; The short-cut denitrification / anaerobic ammonium oxidation reactor is in communication with the hydrolysis acidification device, and the supernatant containing volatile fatty acids in the hydrolysis acidification device can enter the short-cut denitrification / anaerobic ammonium oxidation reactor; The short-cut denitrification / anaerobic ammonium oxidation reactor is capable of being fed with denitrification sludge. A packing rack (43) is fixedly provided in the short-cut denitrification / anaerobic ammonium oxidation reactor. A packing string (42) is suspended from the packing rack (43). The packing string (42) is used to grow an anaerobic ammonium oxidation biofilm to form a short-cut denitrification reaction and an anaerobic ammonium oxidation reaction. The hydrolysis acidifier includes a hydrolysis acidification tank (16); The hydrolysis and acidification tank (16) is configured as a sealed structure, the bottom area of ​​the cavity in the hydrolysis and acidification tank (16) is a first sludge sedimentation area (21), and the top area of ​​the cavity in the hydrolysis and acidification tank (16) is a first gas collection area (19); The hydrolysis acidifier further comprises a first agitator (2); The first stirrer (2) is connected to a first stirring rod (4), and one end of the first stirring rod (4) extending into the hydrolysis acidification tank (16) is provided with a first stirring blade (6); First heating wires (10) are evenly arranged on the outside of the hydrolysis and acidification tank (16); a first temperature probe (8) is provided at one end of the first heating wire (10) close to the port of the hydrolysis and acidification tank (16); a first temperature controller (12) is provided at one end of the first heating wire (10) away from the first temperature probe (8); and the first temperature controller (12) is connected to a first leakage protector (14).

2. The reaction device for treating high ammonia nitrogen and low carbon nitrogen ratio wastewater according to claim 1, characterized in that: The hydrolysis and acidification tank (16) is provided with a first water outlet (31), and the first water outlet (31) is connected to the short-cut denitrification / anaerobic ammonium oxidation reactor via a water outlet pump (35), so that the supernatant containing volatile fatty acids in the hydrolysis and acidification tank (16) can enter the short-cut denitrification / anaerobic ammonium oxidation reactor; A filter (41) is provided in the first water outlet (31); A first sludge discharge port (25) is provided at the bottom of the hydrolysis and acidification tank (16), and the excess sludge in the first sludge sedimentation area (21) is discharged through the first sludge discharge port (25); The hydrolysis and acidification tank (16) is provided with a first manual inspection port (27); The hydrolysis and acidification tank (16) is provided with a first exhaust port (23), and the first exhaust port (23) is connected to the tail gas absorption component (40) through a pipeline; The hydrolysis and acidification tank (16) is provided with a first water inlet (29), and the first water inlet (29) is connected to a first water inlet pump (33) through a pipeline.

3. The reaction device for treating high ammonia nitrogen and low carbon nitrogen ratio wastewater according to claim 2, characterized in that: The short-cut denitrification / anaerobic ammonium oxidation reactor includes a short-cut denitrification / anaerobic ammonium oxidation reaction tank (15); The short-cut denitrification / anaerobic ammonium oxidation reaction tank (15) is configured as a sealed structure, the bottom area of ​​the cavity in the short-cut denitrification / anaerobic ammonium oxidation reaction tank (15) is a second sludge sedimentation area (20), and the top area of ​​the cavity in the short-cut denitrification / anaerobic ammonium oxidation reaction tank (15) is a second gas collection area (18); A packing area (17) is located between the second sludge sedimentation area (20) and the second gas collection area (18), and the packing rack (43) and the packing string (42) are both located in the packing area (17).

4. The reaction device for treating high-ammonia nitrogen and low-carbon-nitrogen ratio wastewater according to claim 3, characterized in that: The short-cut denitrification / anaerobic ammonium oxidation reactor further comprises a second agitator (1); The second stirrer (1) is connected to a second stirring rod (3), and one end of the second stirring rod (3) extending into the short-range denitrification / anaerobic ammonium oxidation reaction tank (15) is provided with a second stirring blade (5).

5. The reaction device for treating high ammonia nitrogen and low carbon nitrogen ratio wastewater according to claim 3, characterized in that: Second heating wires (9) are evenly arranged on the outside of the short-range denitrification / anaerobic ammonium oxidation reaction tank (15), a second temperature probe (7) is provided at one end of the second heating wire (9) close to the port of the short-range denitrification / anaerobic ammonium oxidation reaction tank (15), a second temperature controller (11) is provided at one end of the second heating wire (9) away from the second temperature probe (7), and the second temperature controller (11) is connected to a second leakage protector (13).

6. The reaction device for treating high-ammonia nitrogen and low-carbon-nitrogen ratio wastewater according to claim 4, characterized in that: The short-cut denitrification / anaerobic ammonium oxidation reaction tank (15) is provided with a second water outlet (30), and the second water outlet (30) is connected to a water outlet solenoid valve (34) through a pipeline. When the water outlet solenoid valve (34) is opened, the liquid in the short-cut denitrification / anaerobic ammonium oxidation reaction tank (15) is discharged through the second water outlet (30); The short-cut denitrification / anaerobic ammonium oxidation reaction tank (15) is further provided with a first sampling port (36) and a second sampling port (37), wherein the first sampling port (36) is located above the second water outlet (30), and the second sampling port (37) is located below the second water outlet (30); A second sludge discharge port (24) is provided at the bottom of the short-cut denitrification / anaerobic ammonium oxidation reaction tank (15), and the excess sludge in the second sludge sedimentation area (20) is discharged through the second sludge discharge port (24); The short-cut denitrification / anaerobic ammonium oxidation reaction tank (15) is provided with a second manual inspection port (26); The short-cut denitrification / anaerobic ammonium oxidation reaction tank (15) is provided with a second exhaust port (22); The short-cut denitrification / anaerobic ammonium oxidation reaction tank (15) is provided with a second water inlet (28), the second water inlet (28) is connected to a second water inlet pump (32) through a pipeline, and the second water inlet pump (32) is connected to the water outlet pump (35).

7. The reaction device for treating high-ammonia nitrogen and low-carbon-nitrogen ratio wastewater according to claim 6, characterized in that: The reaction device for treating wastewater with high ammonia nitrogen and low carbon-nitrogen ratio further includes a first controller (39) and a second controller (38); The first controller (39) is used to control the opening and closing of the first agitator (2), the first water inlet pump (33) and the water outlet pump (35); The second controller (38) is used to control the opening and closing of the second agitator (1), the second water inlet pump (32) and the water outlet solenoid valve (34).

Images