MCHS bioreactor and method for treating high-toxicity organic nitrogen chemical wastewater by using MCHS bioreactor

Abstract

The invention provides an MCHS bioreactor and a method for treating high-toxicity organic nitrogen chemical wastewater by using the MCHS bioreactor, the MCHS bioreactor comprises a reactor main body, one side of the reactor main body is provided with a box body through a fixing frame, a conveying device is arranged in the reactor main body, a circular box is connected to one end of the conveying device, and a rotating assembly is arranged in the circular box; the connecting pipe is connected to one side of the circular box, the stirring device is arranged in the box body, the valve is installed in the center of the bottom of the box body, one end of the valve is connected with a communicating pipe, and a liquid outlet assembly is arranged at one end of the communicating pipe. According to the MCHS bioreactor provided by the invention, wastewater subjected to pretreatment can be firstly mixed with liquid in the reactor main body when being conveyed into the reactor main body, so that an ecological structure is prevented from being damaged when the wastewater is directly conveyed into the reactor main body; meanwhile, the impact force is reduced when the wastewater is conveyed into the reactor main body, so that biological carriers in the reactor main body can be prevented from being damaged.

Description

Technical Field

[0001] The invention relates to the field of sewage treatment, in particular to a MCHS bioreactor and a method for treating highly toxic organic nitrogen chemical wastewater using the same. Background Art

[0002] Wastewater treatment refers to a series of physical, chemical and biological treatment processes to ensure that wastewater meets the water quality requirements for discharge into a water body or reuse.

[0003] At present, different methods are used for auxiliary operations in sewage treatment, among which the MCHS biological method is one of them. The MCHS bioreactor decomposes organic pollutants in sewage into harmless substances through the metabolism of microorganisms, thereby achieving the purpose of purifying sewage.

[0004] The current MCHS bioreactor, when in use, will treat the pretreated wastewater by aeration through the bacteria in the reactor. However, when the wastewater is transported internally, it is easy for an ecological imbalance to occur between the internally prepared solution and the wastewater transported internally, and the impact force generated when the wastewater is transported to the inside of the MCHS bioreactor may cause impact damage to the biofilm carrier inside the MCHS bioreactor.

[0005] Therefore, it is necessary to provide a MCHS bioreactor to solve the above technical problems. Summary of the invention

[0006] The present invention provides an MCHS bioreactor, which solves the problem that, when wastewater is transported to the interior of the existing MCHS bioreactor, ecological imbalance occurs easily between the internally prepared solution and the wastewater transported to the interior, and the impact force generated when the wastewater is transported to the interior of the MCHS bioreactor causes impact damage to the biofilm carrier inside the MCHS bioreactor.

[0007] In order to solve the above technical problems, the MCHS biological reaction provided by the present invention comprises:

[0008] A reactor body, one side of which is mounted with a box body via a fixing frame, and one side of which is connected with a filling pipe;

[0009] A delivery device, the delivery device is arranged inside the reactor body, the delivery device comprises a delivery pump, and an input end and an output end of the delivery pump are respectively connected to a first delivery pipe and a second delivery pipe;

[0010] A circular box, the circular box being connected to one end of the second conveying pipe, and a rotating assembly being arranged inside the circular box;

[0011] A connecting pipe connected to one side of the circular box;

[0012] A stirring device, wherein the stirring device is arranged inside the box;

[0013] A valve is installed at the center of the bottom of the box body, one end of the valve is connected to a connecting pipe, and one end of the connecting pipe is provided with a liquid outlet component located inside the reactor body.

[0014] Preferably, the rotating assembly comprises a rotating rod, and a plurality of rotating blades are connected to the surface of the rotating rod.

[0015] Preferably, a box cover is installed on the top of the circular box, and the top end of the rotating rod is rotatably connected to the center position of the bottom of the box cover through a rotating shaft.

[0016] Preferably, the stirring assembly comprises a rotating rod, the bottom end of the rotating rod is connected to a fixed rod via a connecting block, and a plurality of stirring blades are connected to the surface of the fixed rod.

[0017] Preferably, a box cover is installed on the top end of the box body, and the top end of the rotating rod passes through the box cover and is connected to the bottom end of the rotating rod.

[0018] Preferably, the liquid outlet assembly comprises a spiral tube, one side of the spiral tube is connected to a liquid outlet pipe, one end of the liquid outlet pipe passes through the reactor body and is connected to one end of the connecting tube.

[0019] Preferably, a cover plate is provided on the top of the reactor body, and a filling port is installed on the surface of the cover plate.

[0020] Preferably, a protective component is provided on the surface of the rotating rod and between the circular box and the box cover, and the protective component includes two protective covers, and rectangular blocks are connected to opposite sides of the two protective covers, and bolts are provided between the plurality of rectangular blocks.

[0021] Preferably, a lifting assembly is provided between the box body and the fixing frame, the lifting assembly comprises a lifting plate, the surface of the lifting plate is connected to a connecting plate, one end of the connecting plate is connected to the fixing frame, and a concave through groove is provided at the center position of the surface of the lifting plate.

[0022] The method for treating highly toxic organic nitrogen chemical wastewater by using MCHS bioreactor comprises the following steps:

[0023] S1. Pre-treat highly toxic organic nitrogen chemical wastewater and adjust the pH value to an appropriate range to adapt to the subsequent biological treatment process;

[0024] S2, after pre-treating the wastewater in S1, the wastewater is then transported to the interior of the box through the filling pipe. After the treated wastewater is transported to the interior of the box, the delivery pump is started to transport the liquid in the reactor body through the first delivery pipe and the second delivery pipe to the interior of the box through the circular box and the connecting pipe. After the liquid inside the reactor body is transported to the interior of the circular box, the rotating rod is driven to rotate by pushing a plurality of rotating blades. When the plurality of rotating blades drive the rotating rod to rotate, the rotating rod drives the fixed rod to rotate. When the rotating rod drives the fixed rod to rotate, the pre-treated wastewater injected into the box and the wastewater inside the reactor body are mixed by a plurality of stirring blades on the surface of the fixed rod. After the wastewater and the liquid inside the reactor body are mixed, the delivery pump is stopped, and the valve at the bottom of the box is opened to transport the mixed wastewater inside the box through the liquid outlet pipe and the spiral tube to the interior of the reactor body. After the mixed wastewater is transported to the interior of the reactor body, the organic nitrogen in the wastewater is biocatalytically degraded by the domesticated electrochemically active bacteria, thereby effectively reducing the biological toxicity of the wastewater.

[0025] S3. Use high-load denitrification technology to conduct deep denitrification treatment of the effluent after MCHS treatment by simultaneous nitrification and denitrification. By filling special biological fillers to provide a large amount of biofilm attachment area, anaerobic denitrification inside the filler and aerobic nitrification outside are achieved. At the same time, the growth status of the biofilm is monitored. By detecting the parameters of COD, total nitrogen, total phosphorus, DO, and pH, the stable operation of the biological pretreatment system is guaranteed, and the ammonia nitrogen and total nitrogen in the wastewater are further removed to obtain the system effluent.

[0026] Compared with the related art, the MCHS bioreactor provided by the present invention has the following beneficial effects:

[0027] The present invention provides an MCHS bioreactor, in which a conveying device and a liquid outlet component are arranged inside a reactor body, a rotating component is arranged inside a circular box, a stirring component is arranged in a box body, and a connecting pipe and a connecting pipe with a valve are used in coordination with each other. When pretreated wastewater is conveyed to the inside of the reactor body, the wastewater can be first mixed with the liquid inside the reactor body to prevent damage to the ecological structure when the wastewater is directly conveyed to the inside of the reactor body. At the same time, when the wastewater is conveyed to the inside of the reactor body, the impact force can be reduced to prevent damage to the biological carrier inside the reactor body. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic structural diagram of a first embodiment of the MCHS bioreactor provided by the present invention;

[0029] Figure 2 for Figure 1 An enlarged schematic diagram of part A is shown;

[0030] Figure 3for Figure 1 The three-dimensional structure schematic diagram of the overall device from a first viewing angle is shown;

[0031] Figure 4 for Figure 3 An enlarged schematic diagram of part B is shown;

[0032] Figure 5 for Figure 3 An enlarged schematic diagram of part C is shown;

[0033] Figure 6 for Figure 1 A schematic diagram of the three-dimensional structure of the overall device from a second viewing angle is shown;

[0034] Figure 7 for Figure 1 A schematic diagram of the three-dimensional structure of the overall device from a third viewing angle is shown;

[0035] Figure 8 A schematic structural diagram of a second embodiment of the MCHS bioreactor provided by the present invention;

[0036] Fig. 9 for Figure 8 An enlarged schematic diagram of the D portion shown;

[0037] Fig.10 This is a schematic structural diagram of the third embodiment of the MCHS bioreactor provided by the present invention.

[0038] Numbers in the figure: 1, reactor body; 2, fixed frame; 3, box body;

[0039] 4. Delivery device; 41. Delivery pump; 42. First delivery pipe; 43. Second delivery pipe;

[0040] 5. Round box;

[0041] 6. Rotating assembly; 61. Rotating rod; 62. Rotating blade;

[0042] 7. Connecting pipe;

[0043] 8. stirring assembly; 81. rotating rod; 82. fixed rod; 83. stirring blade;

[0044] 9. Filling pipe; 10. Valve; 11. Connecting pipe;

[0045] 12. liquid outlet assembly; 121. spiral tube; 122. liquid outlet pipe;

[0046] 13. Box cover; 14. Box cover; 15. Cover plate; 16. Filling port; 17.

[0047] 18. Protective assembly; 181. Protective cover; 182. Rectangular block; 183. Bolt;

[0048] 19. Lifting assembly; 191. Lifting plate; 192. Connecting plate; 193. Concave through groove. DETAILED DESCRIPTION

[0049] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0050] First embodiment

[0051] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 ,in, Figure 1 A schematic structural diagram of a first embodiment of the MCHS bioreactor provided by the present invention; Figure 2 for Figure 1 An enlarged schematic diagram of part A is shown; Figure 3 for Figure 1 The three-dimensional structure schematic diagram of the overall device from a first viewing angle is shown;

[0052] Figure 4 for Figure 3 An enlarged schematic diagram of part B is shown; Figure 5 for Figure 3 An enlarged schematic diagram of part C is shown; Figure 6 for Figure 1 A schematic diagram of the three-dimensional structure of the overall device from a second viewing angle is shown; Figure 7 for Figure 1 The 3D schematic diagram of the overall structure of the device from the third perspective is shown. The MCHS bioreactor comprises:

[0053] A reactor body 1, a box body 3 is mounted on one side of the reactor body 1 through a fixing frame 2, and a filling pipe 9 is connected to one side of the box body 3;

[0054] A conveying device 4, wherein the conveying device 4 is disposed inside the reactor body 1, and comprises a conveying pump 41, wherein an input end and an output end of the conveying pump 41 are respectively connected to a first conveying pipe 42 and a second conveying pipe 43;

[0055] A circular box 5, the circular box 5 is connected to one end of the second delivery tube 43, and a rotating assembly 6 is disposed inside the circular box 5;

[0056] A connecting pipe 7, wherein the connecting pipe 7 is connected to one side of the circular box 5;

[0057] A stirring device 8, wherein the stirring device 8 is arranged inside the box 3;

[0058] A valve 10 is installed at the center of the bottom of the box body 3 , one end of the valve 10 is connected to a connecting pipe 11 , and one end of the connecting pipe 11 is provided with a liquid outlet component 12 inside the reactor body 1 .

[0059] The rotating assembly 6 includes a rotating rod 61 , and a plurality of rotating blades 62 are connected to the surface of the rotating rod 61 .

[0060] The top end of the rotating rod 81 passes through the bottom of the circular box 5 and is connected to the bottom end of the rotating rod 61 . The connection between the rotating rod 81 and the bottom of the circular box 5 is connected via a bearing.

[0061] A box cover 14 is installed on the top of the circular box 5, and the top end of the rotating rod 61 is rotatably connected to the center position of the bottom of the box cover 14 through a rotating shaft.

[0062] The stirring assembly 8 includes a rotating rod 81 , the bottom end of which is connected to a fixed rod 82 via a connecting block, and a plurality of stirring blades 83 are connected to the surface of the fixed rod 82 .

[0063] The use of the rotating rod 61 and the multiple rotating blades 62 facilitates the liquid inside the reactor body 1 to be transported to the inside of the box body 3 through the circular box 5 and the connecting pipe 7 through the delivery pump 41, the first delivery pipe 42 and the second delivery pipe 43, which plays a role in driving the stirring assembly 8 to rotate. The delivery pump 41 is installed on the surface of the cover plate 15, and the spiral tube 121 is installed inside the reactor body 1.

[0064] A box cover 13 is installed at the top end of the box body 3 , and the top end of the rotating rod 81 passes through the box cover 13 and is connected to the bottom end of the rotating rod 61 .

[0065] The connecting pipe 7 passes through the box cover 13 and extends to the interior of the box body 3 . The filling pipe 9 can be connected to the wastewater pretreatment equipment for use.

[0066] The liquid outlet assembly 12 includes a spiral tube 121 , one side of the spiral tube 121 is connected to a liquid outlet pipe 122 , one end of the liquid outlet pipe 122 passes through the reactor body 1 and is connected to one end of the connecting pipe 11 .

[0067] A cover plate 15 is disposed on the top of the reactor body 1 , and a filling port 16 is installed on the surface of the cover plate 15 .

[0068] The method for treating highly toxic organic nitrogen chemical wastewater by using MCHS bioreactor comprises the following steps:

[0069] S1. Pre-treat highly toxic organic nitrogen chemical wastewater and adjust the pH value to an appropriate range to adapt to the subsequent biological treatment process;

[0070] S2. After the wastewater is pretreated in S1, the wastewater is transported to the inside of the box body 3 through the filling pipe 9. After the treated wastewater is transported to the inside of the box body 3, the delivery pump 41 is started to transport the liquid in the reactor body 1 through the circular box 5 and the connecting pipe 7 to the inside of the box body 3 through the first delivery pipe 42 and the second delivery pipe 43. After the liquid inside the reactor body 1 is transported to the inside of the circular box 5, the rotating rod 61 is driven to rotate by pushing the multiple rotating blades 62. When the multiple rotating blades 62 push the rotating rod 61 to rotate, the fixed rod 82 is driven to rotate by the rotating rod 81. When the rotating rod 81 drives the fixed When the rod 82 rotates, the pre-treated wastewater added inside the box 3 and the wastewater inside the reactor body 1 are mixed by a plurality of stirring blades 83 on the surface of the fixed rod 82. When the wastewater and the liquid inside the reactor body 1 are mixed, the delivery pump 41 is stopped, and the valve 10 at the bottom of the box 3 is opened to deliver the mixed wastewater inside the box 3 to the inside of the reactor body 1 through the liquid outlet pipe 122 and the spiral tube 121. After the mixed wastewater is delivered to the inside of the reactor body 1, the organic nitrogen in the wastewater is biocatalytically degraded by the domesticated electrochemically active bacteria, thereby effectively reducing the biological toxicity of the wastewater.

[0071] S3. Use high-load denitrification technology to conduct deep denitrification treatment of the effluent after MCHS treatment by simultaneous nitrification and denitrification. By filling special biological fillers to provide a large amount of biofilm attachment area, anaerobic denitrification inside the filler and aerobic nitrification outside are achieved. At the same time, the growth status of the biofilm is monitored. By detecting the parameters of COD, total nitrogen, total phosphorus, DO, and pH, the stable operation of the biological pretreatment system is guaranteed, and the ammonia nitrogen and total nitrogen in the wastewater are further removed to obtain the system effluent.

[0072] Case 1:

[0073] The main characteristic pollutant is acetonitrile. The wastewater has the characteristics of high organic nitrogen, high COD, and high biological toxicity, which has a strong inhibitory effect on conventional systems. The COD is about 20304 mg / L, the total nitrogen is 3400 mg / L, the organic nitrogen is 3400 mg / L, and the microbial toxicity is 30%.

[0074] The "MCHS + simultaneous nitrification and denitrification" process achieves efficient nitrogen removal and eliminates biological toxicity. The total residence time is 11 days, of which the MCHS section residence time is 6 days. The final effluent COD can be reduced to about 500mg / L, the total nitrogen is reduced to about 350mg / L, the ammonia nitrogen does not exceed 300mg / L, and the organic nitrogen is completely hydrolyzed; the pretreatment process achieves a COD removal rate of nearly 98%, a total nitrogen removal rate of about 90%, and acetonitrile is completely degraded, with a good denitrification effect.

[0075] Case 2:

[0076] The main characteristic pollutant is N,N-dimethylformamide (DMF for short). The COD of the wastewater is about 13200 mg / L, the total nitrogen is 2237 mg / L, the organic nitrogen is 2200 mg / L, and the microbial toxicity is 0%.

[0077] The "MCHS + simultaneous nitrification and denitrification" process achieves efficient nitrogen removal and eliminates biological toxicity. The total residence time is 12 days, of which the MCHS section residence time is 6 days. The final effluent COD can be reduced to about 500mg / L, total nitrogen to about 500mg / L, ammonia nitrogen does not exceed 450mg / L, and organic nitrogen is less than 20mg / L; the pretreatment process achieves a COD removal rate of more than 96%, a total nitrogen removal rate of about 78%, and DMF can be basically hydrolyzed completely, with a degradation rate of about 99%, and a good denitrification effect.

[0078] The working principle of the MCHS bioreactor provided by the present invention is as follows:

[0079] During use, after the wastewater is pretreated, the wastewater is transported to the interior of the box body 3 through the filling pipe 9. After the treated wastewater is transported to the interior of the box body 3, the delivery pump 41 is started to transport the liquid in the reactor body 1 through the circular box 5 and the connecting pipe 7 to the interior of the box body 3 through the first delivery pipe 42 and the second delivery pipe 43. After the liquid inside the reactor body 1 is transported to the interior of the circular box 5, the rotating rod 61 is driven to rotate by pushing the plurality of rotating blades 62. When the plurality of rotating blades 62 push the rotating rod 61 to rotate, the fixed rod 82 is driven to rotate by the rotating rod 81. When the rotating rod 81 drives the fixed rod 82 to rotate, the pretreated wastewater injected into the box body 3 and the wastewater inside the reactor body 1 are mixed by the plurality of stirring blades 83 on the surface of the fixed rod 82. When the wastewater and the liquid inside the reactor body 1 are mixed, the delivery pump 41 is stopped, and the valve 10 at the bottom of the box body 3 is opened at the same time to transport the mixed wastewater inside the box body 3 to the interior of the reactor body 1 through the liquid outlet pipe 122 and the spiral tube 121.

[0080] Compared with the related art, the MCHS bioreactor provided by the present invention has the following beneficial effects:

[0081] The present invention provides an MCHS bioreactor, wherein a conveying device 4 and a liquid outlet component 12 are arranged inside a reactor body 1, a rotating component 6 is arranged inside a circular box 5, and a stirring component 8, a connecting pipe 7 and a connecting pipe 11 with a valve 10 are respectively arranged in a box body 3 for use in coordination. When pretreated wastewater is conveyed to the inside of the reactor body 1, it can be first mixed with the liquid inside the reactor body 1 to prevent damage to the ecological structure when directly conveyed to the inside of the reactor body 1. At the same time, when the wastewater is conveyed to the inside of the reactor body 1, the impact force is reduced to prevent damage to the biological carrier inside the reactor body 1.

[0082] Second embodiment

[0083] Please refer to Figure 8 and Fig. 9 Based on the MCHS bioreactor provided in the first embodiment of the present application, the second embodiment of the present application proposes another MCHS bioreactor. The second embodiment is only a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0084] Specifically, the difference of the MCHS bioreactor provided in the second embodiment of the present application is that, in the MCHS bioreactor, a protective component 18 is provided on the surface of the rotating rod 81 and between the circular box 5 and the box cover 13, and the protective component 18 includes two protective covers 181, and rectangular blocks 182 are connected to opposite sides of the two protective covers 181, and bolts 183 are provided between the plurality of rectangular blocks 182.

[0085] The two protective covers 181 are symmetrically sleeved on the surface of the rotating rod 81, and the top and bottom ends of the two protective covers 181 are respectively in contact with the bottom of the circular box 5 and the surface of the box cover 13 for support and fixation. Screw holes matching the bolts 183 are opened on the surface of the rectangular block 182.

[0086] The working principle of the MCHS bioreactor provided by the present invention is as follows:

[0087] When in use, when protecting the exposed rotating rod 81, first put the protective cover 181 with multiple rectangular blocks 182 on the surface of the rotating rod 81, and the opposite sides of the two protective covers 181 are in contact, and then use the bolts 183 to thread the multiple rectangular blocks 182 on the two protective covers 81.

[0088] Compared with the related art, the MCHS bioreactor provided by the present invention has the following beneficial effects:

[0089] The present invention provides a MCHS bioreactor, wherein a protective component 18 is arranged between the circular box 5 and the box cover 13 and the rotating rod 81 to protect the rotating rod 81 that is exposed and rotates.

[0090] Third embodiment

[0091] Please refer to Fig.10 Based on the MCHS bioreactor provided in the first embodiment of the present application, the third embodiment of the present application proposes another MCHS bioreactor. The third embodiment is only a preferred embodiment of the first embodiment, and the implementation of the third embodiment will not affect the independent implementation of the first embodiment.

[0092] Specifically, the difference of the MCHS bioreactor provided in the third embodiment of the present application is that, in the MCHS bioreactor, a lifting assembly 19 is arranged between the box body 3 and the fixed frame 2, and the lifting assembly 19 includes a lifting plate 191, and the surface of the lifting plate 191 is connected to a connecting plate 192, one end of the connecting plate 192 is connected to the fixed frame 2, and a concave through groove 193 is opened at the center position of the surface of the lifting plate 191.

[0093] The shape of the lifting plate 191 is compatible with the shape of the box body 3. The size of the lifting plate 191 is larger than the size of the box body 3. The use of the concave through groove 193 makes it easy to prevent the valve 10 from causing an impact during installation when the box body 3 is installed.

[0094] The working principle of the MCHS bioreactor provided by the present invention is as follows:

[0095] During use, when installing and supporting the box body 3 and the reactor body 1, the box body 3 is first installed inside the fixed frame 2, while the bottom of the box body 3 contacts the surface of the lifting plate 191, and the valve 10 at the bottom of the box body 3 is installed inside the concave groove 193 opened on the surface of the lifting plate 191.

[0096] Compared with the related art, the MCHS bioreactor provided by the present invention has the following beneficial effects:

[0097] The present invention provides a MCHS bioreactor, wherein a lifting assembly 19 is arranged between the box body 3 and the fixing frame 2 to play a supporting role when the box body 3 and the reactor body 1 are installed.

[0098] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A MCHS bioreactor, characterized in that: include: A reactor body, one side of which is mounted with a box body via a fixing frame, and one side of which is connected with a filling pipe; A delivery device, the delivery device is arranged inside the reactor body, the delivery device comprises a delivery pump, and an input end and an output end of the delivery pump are respectively connected to a first delivery pipe and a second delivery pipe; A circular box, the circular box being connected to one end of the second conveying tube, and a rotating assembly being arranged inside the circular box; A connecting pipe connected to one side of the circular box; A stirring device, wherein the stirring device is arranged inside the box; A valve is installed at the center of the bottom of the box body, one end of the valve is connected to a connecting pipe, and one end of the connecting pipe is provided with a liquid outlet component located inside the reactor body.

2. The MCHS bioreactor according to claim 1, characterized in that The rotating assembly comprises a rotating rod, and a plurality of rotating blades are connected to the surface of the rotating rod.

3. The MCHS bioreactor according to claim 2, characterized in that A box cover is installed on the top of the circular box, and the top end of the rotating rod is rotatably connected to the center position of the bottom of the box cover through a rotating shaft.

4. The MCHS bioreactor according to claim 2, characterized in that The stirring assembly comprises a rotating rod, the bottom end of which is connected to a fixed rod via a connecting block, and a plurality of stirring blades are connected to the surface of the fixed rod.

5. The MCHS bioreactor according to claim 4, characterized in that A box cover is installed at the top end of the box body, and the top end of the rotating rod passes through the box cover and is connected to the bottom end of the rotating rod.

6. The MCHS bioreactor according to claim 1, characterized in that: The liquid outlet assembly comprises a spiral tube, one side of the spiral tube is connected to a liquid outlet pipe, one end of the liquid outlet pipe penetrates the reactor body and is connected to one end of the connecting pipe.

7. The MCHS bioreactor according to claim 1, characterized in that A cover plate is arranged on the top of the reactor body, and a filling port is installed on the surface of the cover plate.

8. The MCHS bioreactor according to claim 5, characterized in that A protection component is arranged on the surface of the rotating rod and between the circular box and the box cover. The protection component includes two protection covers. Rectangular blocks are connected to opposite sides of the two protection covers. Bolts are arranged between the plurality of rectangular blocks.

9. The MCHS bioreactor according to claim 1, characterized in that: A lifting assembly is arranged between the box body and the fixing frame, and the lifting assembly includes a lifting plate, a connecting plate is connected to the surface of the lifting plate, one end of the connecting plate is connected to the fixing frame, and a concave through groove is opened at the center position of the lifting plate surface.

10. A method for treating highly toxic organic nitrogen chemical wastewater using a MCHS bioreactor, characterized in that: The following steps are involved: S1. Pre-treat highly toxic organic nitrogen chemical wastewater and adjust the pH value to an appropriate range to adapt to the subsequent biological treatment process; S2, after pre-treating the wastewater in S1, the wastewater is then transported to the interior of the box through the filling pipe. After the treated wastewater is transported to the interior of the box, the delivery pump is started to transport the liquid in the reactor body through the first delivery pipe and the second delivery pipe to the interior of the box through the circular box and the connecting pipe. After the liquid inside the reactor body is transported to the interior of the circular box, the rotating rod is driven to rotate by pushing a plurality of rotating blades. When the plurality of rotating blades drive the rotating rod to rotate, the rotating rod drives the fixed rod to rotate. When the rotating rod drives the fixed rod to rotate, the pre-treated wastewater injected into the box and the wastewater inside the reactor body are mixed by a plurality of stirring blades on the surface of the fixed rod. After the wastewater and the liquid inside the reactor body are mixed, the delivery pump is stopped, and the valve at the bottom of the box is opened to transport the mixed wastewater inside the box through the liquid outlet pipe and the spiral tube to the interior of the reactor body. After the mixed wastewater is transported to the interior of the reactor body, the organic nitrogen in the wastewater is biocatalytically degraded by the domesticated electrochemically active bacteria, thereby effectively reducing the biological toxicity of the wastewater. S3. Use high-load denitrification technology to conduct deep denitrification treatment of the effluent after MCHS treatment by simultaneous nitrification and denitrification. By filling special biological fillers to provide a large amount of biofilm attachment area, anaerobic denitrification inside the filler and aerobic nitrification outside are achieved. At the same time, the growth status of the biofilm is monitored. By detecting the parameters of COD, total nitrogen, total phosphorus, DO, and pH, the stable operation of the biological pretreatment system is guaranteed, and the ammonia nitrogen and total nitrogen in the wastewater are further removed to obtain the system effluent.

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