Electrocatalytic flocculation backflow bioreactor

Abstract

The electro-catalytic flocculation backflow biological reactor comprises an electrolysis unit, a reaction cooling unit, a biochemical module, a precipitation unit, an electrolysis filtration unit and a filler air-lift backflow device; the water inlet of the electrolysis unit is connected with a water inlet pipe, the water outlet is connected with the water inlet of the reaction cooling unit, the water outlet of the reaction cooling unit is connected with the water inlet of the biochemical module, the water outlet of the biochemical module is connected with the water inlet of the precipitation unit, an intercepting net is arranged between the water outlet of the biochemical module and the water inlet of the precipitation unit, the water outlet of the precipitation unit is connected with the water inlet of the electrolysis filtration unit, and the water outlet of the electrolysis filtration unit is connected with a water outlet pipe; the biochemical module is internally provided with MBBR fillers, the biochemical module is internally arranged with the filler air-lift backflow device, the water inlet of the filler air-lift backflow device is arranged close to the intercepting net, the water outlet is arranged at one end of the water inlet of the biochemical module, and the filler air-lift backflow device carries the MBBR fillers at the intercepting net to the water inlet of the biochemical module. The present application can realize the circulation flow of MBBR and improve the sewage treatment efficiency.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, and in particular relates to an electrocatalytic flocculation reflux bioreactor. Background Technology

[0002] Current Status of Industrial Wastewater Treatment: Overall, my country's water pollution situation remains severe, with pollution levels alarmingly high. The water quality of rivers and lakes is already beyond their capacity to handle the pollution, yet the discharge of various types of wastewater continues to increase. Industrial wastewater is the primary source of river pollution. Water pollution incidents occur frequently in my country, averaging around 1,000 incidents per year. This is mainly due to the continued existence of numerous highly polluting enterprises, many of which lack the funds or are unwilling to invest in industrial wastewater treatment, leading to widespread illegal discharges. Beyond larger cities, sewage in many towns and cities is not effectively treated, exacerbating the drinking water safety issues for many urban and rural residents. According to estimates by the State Environmental Protection Administration, environmental losses in my country account for nearly 10% of the country's GDP, highlighting the severity of my country's water pollution situation.

[0003] The increasing number and complexity of pollutants in industrial wastewater have made its treatment extremely challenging. This is especially true for recalcitrant wastewater, such as papermaking and pharmaceutical wastewater, which typically exhibit high COD and low BOD / COD ratios. Treating this type of wastewater is difficult, and commercially available solutions typically employ Fenton oxidation as pretreatment followed by biological reactions. However, this often results in substandard COD levels, large sludge production, and severe disruption to the biological reaction process, leading to organism mortality. Existing MBBR (Medium-Medium-Density Bleach) technology produces less sludge, exhibits strong resistance to water quality shocks, and has a low sludge load in the sedimentation tank. However, it suffers from uneven distribution of the packing material within the tank, leading to reduced treatment efficiency. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by providing an electrocatalytic flocculation reflux bioreactor that enables the circulating flow of MBBR and improves wastewater treatment efficiency.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] The electro-catalytic flocculation reflux bioreactor comprises an electrolysis unit, a reaction cooling unit, a biochemical module, a precipitation unit, an electrolysis filtration unit and a filler air-lift reflux device; the water inlet of the electrolysis unit is connected with a water inlet pipe, the water outlet of the electrolysis unit is connected with the water inlet of the reaction cooling unit, a dosing mixer is arranged between the water outlet of the electrolysis unit and the water inlet of the reaction cooling unit, the water outlet of the reaction cooling unit is connected with the water inlet of the biochemical module, the water outlet of the biochemical module is connected with the water inlet of the precipitation unit, an intercepting net is arranged between the water outlet of the biochemical module and the water inlet of the precipitation unit, the water outlet of the precipitation unit is connected with the water inlet of the electrolysis filtration unit, and the water outlet of the electrolysis filtration unit is connected with a water outlet pipe; the biochemical module is provided with MBBR fillers, the filler air-lift reflux device is arranged in the biochemical module, the water inlet of the filler air-lift reflux device is arranged close to the intercepting net, the water outlet of the filler air-lift reflux device is arranged at one end of the water inlet of the biochemical module, and the filler air-lift reflux device carries the MBBR fillers at the intercepting net to the water inlet of the biochemical module. All biochemical sections adopt the MBBR process, i.e. the pure membrane process, the process has the advantages of less sludge production, strong water quality impact resistance, low sludge load of the precipitation tank, the MBBR fillers are circulated by the filler air-lift reflux device, the MBBR fillers are prevented from being unevenly distributed, and the sewage treatment efficiency is improved.

[0007] In the embodiment, the biochemical module is divided into three biochemical units by a partition, the three biochemical units comprise a first biochemical unit, a second biochemical unit and a third biochemical unit, the first biochemical unit, the second biochemical unit and the third biochemical unit are arranged in a triangular shape, the first biochemical unit and the second biochemical unit are located on one side, and the third biochemical unit is located on the other side, a gap is arranged between the partition and the side wall, the gap forms a water flow channel for water flow and MBBR fillers, the first biochemical unit, the second biochemical unit and the third biochemical unit are sequentially communicated through the water flow channel, the first biochemical unit, the second biochemical unit and the third biochemical unit are provided with MBBR fillers, the filler air-lift reflux device is arranged between the first biochemical unit and the third biochemical unit, and the fan serves as a gas supply device of the filler air-lift reflux device. The three biochemical units are arranged in one module, and the circulation flow of the MBBR fillers can be realized through the filler air-lift reflux device.

[0008] In the embodiment, the first biochemical unit, the second biochemical unit and the third biochemical unit are respectively provided with aeration devices, the fan serves as a gas supply device of the aeration devices, and the aeration devices are respectively provided with electric valves. The electric valves arranged on the aeration devices can control each biochemical unit to be in an aerobic mode or an anaerobic mode.

[0009] In the embodiment, the water inlet of the electrolytic filtration unit is arranged at the top, the filtration plates are arranged in multiple layers horizontally in the electrolytic filtration unit, the multiple layers of filtration plates form a filtration layer, the electrode plates are arranged above the filtration layer, the water outlet of the electrolytic filtration unit is arranged below the filtration layer, the dredging port is arranged at the bottom of the electrolytic filtration unit, the dredging valve is arranged on the dredging port, the detection device for monitoring the COD index is arranged at the position of the water outlet in the electrolytic filtration unit, the tail water air-lifting backflow device is further arranged in the electrolytic filtration unit, the fan serves as the air supply device of the tail water backflow device, the water inlet of the tail water air-lifting backflow device is arranged below the filtration layer, the water outlet of the tail water air-lifting backflow device is arranged in the electrolytic unit, and the electrolytic filtration unit is communicated with the electrolytic unit through the tail water air-lifting backflow device. The residual precipitate in the unit before the filtration layer is filtered, the electrode plates are used for targeted treatment of the difficult-to-degrade COD of the biochemical module, the detection device can detect whether the sewage treatment meets the standard, and the sewage can be discharged back to the electrolytic unit through the tail water air-lifting backflow device when the standard is not met.

[0010] In the embodiment, the filter material in the filtration plate is a fiber ball or a ceramsite.

[0011] In the embodiment, the dosing mixer is a hollow structure, small holes are uniformly distributed on the surface, the small holes communicate the internal and external spaces, and the internal space is provided with PAC and PAM. The dosing mixer is provided with medicaments, so that the solid-liquid separation of the sewage is realized.

[0012] In the embodiment, the bottom of the precipitation unit is in the shape of a bucket, and the bottom is provided with a sludge discharge port. The second sludge discharge valve is arranged on the sludge discharge port of the precipitation unit. The solid-liquid separation is realized through static precipitation.

[0013] In the embodiment, the electrode plates are arranged in the electrolytic unit, and the overflow port is further arranged on the side surface. The overflow valve is arranged on the overflow port. The electrolytic unit can decompose and break the chains of all kinds of COD in the sewage.

[0014] In the embodiment, the reaction cooling unit is provided with the sludge discharge port at the bottom, the first sludge discharge valve is arranged on the sludge discharge port of the reaction cooling unit, and the stirrer and the constant temperature device are arranged in the reaction cooling unit. The stirrer accelerates the precipitation process, and the constant temperature device avoids the inflow of the sewage with excessively high temperature into the biochemical module. Excessively high temperature is not conducive to the growth of microorganisms.

[0015] In the embodiment, the reaction cooling unit maintains the temperature below 30 DEG C through the constant temperature device. An environment suitable for the growth of microorganisms is provided.

[0016] Meanwhile, the device realizes automatic control through the electric control unit; the signal collected by the detection device is fed back to the electric control unit, the electric control unit controls the tail water gas extraction backflow device to realize the discharge of the sewage which is not completely treated back to the electrolysis unit for reprocessing, realizes the sewage treatment up to the standard, and reasonably distributes the electric quantity through the signal collected by the detection device, and is more economical and practical.

[0017] In conclusion, the present application has the effects of realizing the circulating flow of MBBR, high sewage treatment efficiency, sewage treatment up to the standard and more economical and practical. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. 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.

[0019] Figure 1 is a structure schematic diagram of an electro-catalytic flocculation backflow biological reactor device provided by the embodiments of the present application;

[0020] Figure 2 is a side schematic diagram of an electro-catalytic flocculation backflow biological reactor device provided by the embodiments of the present application;

[0021] 1, reactor; 2, tail water gas extraction backflow device; 3, dosing mixer; 4, water inlet pipe; 5, electrode plate; 6, electrolysis unit; 7, overflow valve; 8, reaction cooling unit; 9, first sludge discharge valve; 10, stirrer; 11, first electric valve; 12, first biochemical unit; 13, aeration device; 14, second electric valve; 15, second biochemical unit; 16, electric control unit; 17, fan; 18, third biochemical unit; 19, third electric valve; 20, MBBR filler; 21, filler gas extraction backflow device; 22, intercepting net; 23, sedimentation unit; 24, electrolysis filtration unit; 25, water outlet pipe; 26, water outlet electric valve; 27, dredging valve; 28, second sludge discharge valve; 29, detection device. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0023] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0024] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0025] Referring to Figure 1 and Figure 2 , the electro-catalytic flocculation reflux bioreactor comprises an electrolysis unit 6, a reaction cooling unit 8, a biochemical module, a sedimentation unit 23, an electrolytic filtration unit 24 and a filler gas stripping reflux device 21.

[0026] The water inlet of the electrolysis unit 6 is connected to the water inlet pipe 4, the water outlet of the electrolysis unit 6 is connected to the water inlet of the reaction cooling unit 8, a dosing mixer 3 is arranged between the water outlet of the electrolysis unit 6 and the water inlet of the reaction cooling unit 8, the water outlet of the reaction cooling unit 8 is connected to the water inlet of the biochemical module, the water outlet of the biochemical module is connected to the water inlet of the sedimentation unit 23, an intercepting net 22 is arranged between the water outlet of the biochemical module and the water inlet of the sedimentation unit 23, the water outlet of the sedimentation unit 23 is connected to the water inlet of the electrolytic filtration unit 24, and the water outlet of the electrolytic filtration unit 24 is connected to the water outlet pipe 25.

[0027] The electrolysis unit 6 is internally arranged with electrode plates 5, and overflow ports are further arranged on the side surfaces, overflow valves 7 being mounted on the overflow ports;

[0028] The dosing mixer 3 is of a hollow structure, small holes being uniformly distributed on the surface, the small holes being in communication with the internal and external spaces, and PAC and PAM being arranged inside.

[0029] The reaction cooling unit 8 is arranged with a sludge discharge port at the bottom, a first sludge discharge valve 9 being mounted on the sludge discharge port of the reaction cooling unit 8, and a stirrer 10 and a constant temperature device being arranged inside the reaction cooling unit 8;

[0030] The biochemical module is divided into three biochemical units by the partition, the three biochemical units include the first biochemical unit 12, the second biochemical unit 15 and the third biochemical unit 18, the first biochemical unit 12, the second biochemical unit 15 and the third biochemical unit 18 are arranged in a triangular shape, the first biochemical unit 12 and the second biochemical unit 15 are located on one side, and the third biochemical unit 18 is located on the other side, gaps are formed between the partition and the side wall, the gaps form water flow channels for water flow and MBBR fillers to pass through, the first biochemical unit 12, the second biochemical unit 15 and the third biochemical unit 18 are sequentially communicated through the water flow channels, MBBR fillers 20 are arranged in the first biochemical unit 12, the second biochemical unit 15 and the third biochemical unit 18, a filler gas lifting reflux device 21 is arranged between the first biochemical unit 12 and the third biochemical unit 18, a fan 17 is used as a gas supply device of the filler gas lifting reflux device 21, a water inlet of the filler gas lifting reflux device 21 is arranged close to a screen 22, a water outlet of the filler gas lifting reflux device 21 is arranged at one end of a biochemical module water inlet, aeration devices 13 are arranged in the first biochemical unit 12, the second biochemical unit 15 and the third biochemical unit 18 respectively, the fan 17 is used as a gas supply device of the aeration devices 13, electric valves are arranged on the aeration devices 13, and the electric valves include a first electric valve 11, a second electric valve 14 and a third electric valve 19;

[0031] The bottom of the sedimentation unit 23 is in the shape of a bucket, a sludge discharge port is arranged at the bottom, and a second sludge discharge valve 28 is mounted on the sludge discharge port of the sedimentation unit 23;

[0032] The water inlet of the electrolytic filtration unit 24 is arranged at the top, filter plates and electrode plates are arranged inside, a plurality of layers of filter plates are horizontally arranged in the electrolytic filtration unit 24, the plurality of layers of filter plates form a filter layer, the electrode plates are arranged above the filter layer, the water outlet of the electrolytic filtration unit 24 is arranged below the filter layer, a dredging port is arranged at the bottom of the electrolytic filtration unit 24, a dredging valve 27 is mounted on the dredging port, a detection device 29 for monitoring a COD index is arranged at the position of the water outlet in the electrolytic filtration unit, and a tail water gas lifting reflux device 2 is further arranged in the electrolytic filtration unit 24, the fan 17 is used as a gas supply device of the tail water reflux device 2, the water inlet of the tail water gas lifting reflux device 2 is arranged below the filter layer, the water outlet of the tail water gas lifting reflux device 2 is arranged in the electrolytic unit 6, and the electrolytic filtration unit 24 is communicated with the electrolytic unit 6 through the tail water gas lifting reflux device 2;

[0033] The stirrer 10, the two electrode plates, the constant temperature device, the filler gas lifting reflux device 21, the tail water gas lifting reflux device 2, the detection device 29, the overflow valve 7, the first sludge discharge valve 9, the first electric valve 11, the second electric valve 14, the third electric valve 19, the water outlet electric valve 26, the dredging valve 27 and the second sludge discharge valve 28 are electrically connected with the electric control unit 16.

[0034] The aeration device, tail water gas extraction return flow 2 and filler gas extraction return flow device 21 are respectively connected with the fan 17 through pipelines.

[0035] The reaction cooling unit 8 keeps the temperature below 30℃ through a thermostat device.

[0036] The pipeline inner diameter of the filler gas extraction return flow device 21 is 100mm.

[0037] The diameter of the MBBR filler is 2mm.

[0038] The filter material used in the filter plate in the electrolytic filtration unit 24 is fiber ball or ceramic.

[0039] Working principle:

[0040] The sewage enters the electrolysis unit 6, and through the action of electric current, all kinds of COD in the sewage are broken down and chain-broken, the macromolecular organic matter in the sewage is changed into small molecular organic matter, and the biodegradability of the sewage is improved. The upper scum is discharged through the periodic opening of the overflow valve 7.

[0041] The sewage flows through the dosing mixer 3, and the PAC and PAM agents therein are brought into the reaction cooling unit 8. The stirrer 10 makes the agents fully mixed with the sewage to accelerate the reaction and make the reaction more sufficient. The precipitate generated during the reaction is discharged through the first sludge discharge valve 9. The thermostat device keeps the temperature of the sewage in the reaction cooling unit 8 below 30℃. The thermostat device avoids the inflow of sewage with excessively high temperature into the biochemical module. Excessively high temperature will be not conducive to the growth of microorganisms.

[0042] The sewage sequentially passes through the first biochemical unit 12, the second biochemical unit 15 and the third biochemical unit 18. The COD and other pollutants in the sewage are removed by the microorganisms on the MBBR filler 20 in the three biochemical units. The first electric valve 11, the second electric valve 14 and the third electric valve 19 can respectively control the first biochemical reaction unit, the second biochemical unit 15 and the third biochemical unit 18 to be in anaerobic mode or aerobic mode. At the same time, the MBBR filler 20 is circulated in the three biochemical reaction units through the filler gas extraction return flow device 21, which avoids the accumulation of the MBBR filler 20 at the interception net 22 and the uneven distribution of the MBBR filler 20 in the three biochemical reaction units.

[0043] The sewage is separated into water and sludge by standing and precipitation in the sedimentation unit 23. The supernatant enters the electrolytic filtration unit 24, and the sediment is discharged through the second sludge discharge valve 28.

[0044] The sewage is further degraded in the electrolytic filtration unit 24 for the part of COD which is difficult to degrade in the biochemical reaction unit, so as to further remove the pollutant in a targeted manner and improve the BOD content, and the filtration layer filters the sediment left in the previous unit; if the detection device 29 arranged at the water outlet of the electrolytic filtration unit 24 detects no COD residue, the water outlet electric valve 26 is opened to drain water, and if the detection device 29 detects that there is still COD residue, the sewage is discharged back to the electrolytic unit 6 for reprocessing through the tail water gas stripping reflux device 2; the electrode plate is disassembled for cleaning the sediment or replacement, and when the work is stopped for dredging, the sediment is discharged through the dredging valve 27.

[0045] Any of the technical solutions disclosed in the present application above, if a numerical range is disclosed, the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that the preferred numerical range is only one of the many implementable numerical values with more obvious technical effects or representative values. Since there are too many values, it is impossible to enumerate them all, so the present application discloses some values to illustrate the technical solutions of the present application, and the above-mentioned enumerated values should not constitute a limitation on the protection scope of the present application.

[0046] Meanwhile, if the above-mentioned present application discloses or involves parts or structural members which are fixedly connected to each other, except otherwise stated, the fixed connection can be understood as being detachably fixedly connected (for example, connected by using bolts or screws), or as being fixedly connected without being detachable (for example, riveted, welded), and of course, the fixed connection can also be replaced by an integral structure (for example, integrally formed by using casting process) (except for obvious cases which cannot be integrally formed).

[0047] In addition, the terms used to represent the positional relationship or shape in any of the technical solutions disclosed in the above-mentioned present application include states or shapes which are approximate, similar or close to them, except otherwise stated. Any component provided by the present application can be assembled from a plurality of separate components or can be a separate component manufactured by an integral forming process.

Claims

1. An electrocatalytic flocculation reflux bioreactor, characterized in that: The system includes an electrolysis unit (6), a reaction cooling unit (8), a biochemical module, a sedimentation unit (23), an electrolytic filtration unit (24), and a packing air-lift reflux device (21). The inlet of the electrolysis unit (6) is connected to the inlet pipe (4), and the outlet of the electrolysis unit (6) is connected to the inlet of the reaction cooling unit (8). A dosing mixer (3) is installed between the outlet of the electrolysis unit (6) and the inlet of the reaction cooling unit (8). The outlet of the reaction cooling unit (8) is connected to the inlet of the biochemical module, and the outlet of the biochemical module is connected to the inlet of the sedimentation unit (23). The outlet of the biochemical module is connected to the inlet of the sedimentation unit (23). An intercepting net (22) is set between them. The outlet of the sedimentation unit (23) is connected to the inlet of the electrolytic filtration unit (24). The outlet of the electrolytic filtration unit (24) is connected to the outlet pipe (25). MBBR packing (20) is set in the biochemical module. A packing air lift reflux device (21) is arranged in the biochemical module. The inlet of the packing air lift reflux device (21) is arranged close to the intercepting net (22). The outlet of the packing air lift reflux device (21) is set at one end of the biochemical module inlet. The packing air lift reflux device (21) transports the MBBR packing (20) at the intercepting net (22) to the biochemical module inlet. The biochemical module is divided into three biochemical units by a partition. The three biochemical units include a first biochemical unit (12), a second biochemical unit (15), and a third biochemical unit (18). The first biochemical unit (12), the second biochemical unit (15), and the third biochemical unit (18) are arranged in a triangular pattern. The first biochemical unit (12) and the second biochemical unit (15) are located on one side, and the third biochemical unit (18) is located on the other side. A gap is provided between the partition and the side wall, and the gap forms a water supply flow and a micro-MB. The water flow channel through which the BR packing passes is used to connect the first biochemical unit (12), the second biochemical unit (15), and the third biochemical unit (18) in sequence. MBBR packing (20) is installed in the first biochemical unit (12), the second biochemical unit (15), and the third biochemical unit (18). A packing air lift return device (21) is arranged between the first biochemical unit (12) and the third biochemical unit (18). A blower (17) serves as the air supply device for the packing air lift return device (21).

2. The electrocatalytic flocculation reflux bioreactor as described in claim 1, characterized in that: Aeration devices (13) are arranged in the first biochemical unit (12), the second biochemical unit (15) and the third biochemical unit (18), respectively. A blower (17) serves as the air supply device for the aeration devices (13), and each aeration device (13) is equipped with an electric valve.

3. The electrocatalytic flocculation reflux bioreactor as described in claim 1, characterized in that: The inlet of the electrolytic filter unit (24) is located at the top. Multiple filter plates are arranged horizontally in the electrolytic filter unit (24), forming a filter layer. Electrode plates are arranged above the filter layer. The outlet of the electrolytic filter unit (24) is located below the filter layer. A sludge removal port is arranged at the bottom of the electrolytic filter unit (24). A sludge removal valve (27) is installed on the sludge removal port. A detection device (29) for monitoring COD index is arranged at the outlet of the electrolytic filter unit. A tailwater air lift return device (2) is also provided in the electrolytic filter unit (24). A blower (17) serves as the air supply device for the tailwater return device (2). The inlet of the tailwater air lift return device (2) is located below the filter layer. The outlet of the tailwater air lift return device (2) is located in the electrolytic unit (6). The electrolytic filter unit (24) is connected to the electrolytic unit (6) through the tailwater air lift return device (2).

4. The electrocatalytic flocculation reflux bioreactor as described in claim 3, characterized in that: The filter material inside the filter plate is fiber balls or ceramic particles.

5. The electrocatalytic flocculation reflux bioreactor as described in claim 1, characterized in that: The dosing mixer (3) has a hollow structure and small holes are evenly distributed on its surface. The small holes connect the hollow structure inside the dosing mixer (3) to the outside. PAC and PAM are installed inside the hollow structure of the dosing mixer (3).

6. The electrocatalytic flocculation reflux bioreactor as described in claim 1, characterized in that: The bottom of the sedimentation unit (23) is shaped like a bucket, and a sludge discharge port is arranged at the bottom. A second sludge discharge valve (28) is installed on the sludge discharge port of the sedimentation unit (23).

7. The electrocatalytic flocculation reflux bioreactor as described in claim 1, characterized in that: The electrolysis unit (6) has an electrode plate (5) inside and an overflow port on the side, and an overflow valve (7) is installed on the overflow port.

8. The electrocatalytic flocculation reflux bioreactor as described in claim 1, characterized in that: The bottom of the reaction cooling unit (8) is provided with a sludge discharge port, and a first sludge discharge valve (9) is installed on the sludge discharge port of the reaction cooling unit (8). A stirrer (10) and a constant temperature device are arranged inside the reaction cooling unit (8).

9. The electrocatalytic flocculation reflux bioreactor as described in claim 8, characterized in that: The reaction cooling unit (8) maintains the temperature below 30°C through a thermostat.

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