CN211712897U - Wastewater treatment system based on integrated membrane biological reaction device - Google Patents
Wastewater treatment system based on integrated membrane biological reaction device Download PDFInfo
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- CN211712897U CN211712897U CN202020122200.5U CN202020122200U CN211712897U CN 211712897 U CN211712897 U CN 211712897U CN 202020122200 U CN202020122200 U CN 202020122200U CN 211712897 U CN211712897 U CN 211712897U
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Abstract
The wastewater treatment system comprises an anaerobic membrane biological reaction device, wherein the wastewater to be treated undergoes an anaerobic reaction in the anaerobic membrane biological reaction device to obtain first wastewater; the middle adjusting water tank is connected with a water outlet of the anaerobic membrane biological reaction device and is used for adjusting the first wastewater; and the integrated membrane biological reaction device is used for carrying out biological denitrification reaction on the first wastewater to obtain standard wastewater. After the wastewater of the utility model is treated by anaerobic-biological denitrification, the quality of the effluent water is stable and reaches the standard; the wastewater treatment system of the utility model is centralized, the occupied area is reduced, and the operation and management are convenient; the adopted time control system can improve the wastewater treatment efficiency and improve the pollutant removal efficiency of wastewater treatment; the utility model discloses can realize the denitrogenation of waste water at low temperature and fall carbon treatment effect, realize waste water discharge to reach standard.
Description
Technical Field
The utility model belongs to the technical field of waste water treatment, especially, relate to a effluent disposal system based on integral type membrane biological reaction device.
Background
The aquaculture wastewater has the pollution characteristics of high ammonia nitrogen (250-. The returning treatment and natural treatment modes are less adopted due to larger occupied area, secondary pollution and the like, while the biological treatment mode is mainly an anaerobic-anoxic-aerobic-purification pond combined treatment mode, and the treatment process is longer, inconvenient to manage, general in treatment effect and large in occupied area. Aiming at the problems of poor operation effect, long process flow, high operation cost and the like in the biological treatment process of livestock and poultry breeding wastewater, the development of a high-efficiency and low-consumption treatment process for breeding is necessary.
SUMMERY OF THE UTILITY MODEL
In view of the above, one of the main objects of the present invention is to provide a wastewater treatment system based on an integrated membrane bioreactor, so as to at least partially solve at least one of the above technical problems.
In order to achieve the above object, the utility model provides a wastewater treatment system based on integral type membrane biological reaction device, include:
the anaerobic membrane biological reaction device is used for generating anaerobic reaction in the wastewater to be treated to obtain first wastewater;
the middle adjusting water tank is connected with a water outlet of the anaerobic membrane biological reaction device and is used for adjusting the first wastewater; and
the integrated membrane biological reaction device is used for performing biological denitrification reaction on the first wastewater to obtain standard wastewater.
Based on the technical scheme, the utility model discloses a waste water treatment system based on integral type membrane biological reaction device has one of following advantage at least for prior art:
1. after the wastewater is subjected to anaerobic-biological denitrification treatment, the quality of the effluent water stably reaches the standard;
2. the wastewater treatment equipment is centralized, the occupied area is reduced, and the operation and management are convenient;
3. the time control system adopted by the utility model can improve the wastewater treatment efficiency and improve the removal efficiency of wastewater treatment pollutants;
4. the integrated membrane bioreactor can realize the denitrification and carbon reduction treatment effect of the wastewater at low temperature and realize the standard discharge of the wastewater;
5. the pretreatment method of the utility model provides controllable micro aeration for the pretreatment reactor, effectively decomposes the substances which are difficult to decompose in the conventional hydrolysis acidification process, effectively degrades the surfactant and simultaneously does not generate foam which influences the operation of the system;
6. the surfactant is degraded by microorganisms in the pretreatment reactor and does not exist in the sludge discharged by the system any more; by setting a longer sludge age, the pretreatment device and the method of the utility model have extremely limited excess sludge;
7. the utility model discloses a preprocessing device and method can high-efficiently get rid of surfactant active and organic matter in the waste water to do not produce a large amount of foams and a large amount of solid waste, can regard as the substitution technology of surfactant active waste water physicochemical pretreatment such as concrete, foam separation.
Drawings
FIG. 1 is a schematic structural view of a wastewater treatment plant according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a pretreatment device in an embodiment of the present invention.
In the above figures, the reference numerals have the following meanings:
100-anaerobic membrane bioreactor; 101-a water inlet pump; 102-ultrafiltration membrane water inlet end; 103-a circulation pump; 104-ultrafiltration membrane; 105-pressure gauge; 106-ultrafiltration membrane water outlet end; 200-an intermediate regulating water tank; 300-integrated membrane bioreactor; 301-a second water inlet pump; 302-stirring paddle; 303-an aeration sand disc; 304-dissolved oxygen probe; 305-pH probe; 306-an oxidation reduction potential probe; 307-plate membranes; 308-a water outlet pump; 309-membrane aeration fan; 310-biological aeration fan; 311-a timing control unit; 400-water outlet tank; 501-a primary filter; 502-regulating the water tank; 503-a pretreatment water inlet pump; 504-pretreatment reactor; 505-a circulation pump; 506-pretreating a membrane module; 507-pretreating the ORP sensor; 508-sludge pump; 509-solenoid valve; 510-blower.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.
The utility model discloses a effluent disposal system based on integral type membrane biological reaction device, include:
the anaerobic membrane biological reaction device is used for generating anaerobic reaction in the wastewater to be treated to obtain first wastewater;
the middle adjusting water tank is connected with a water outlet of the anaerobic membrane biological reaction device and is used for adjusting the first wastewater; and
the integrated membrane biological reaction device is used for performing biological denitrification reaction on the first wastewater to obtain standard wastewater.
In some embodiments of the present invention, the anaerobic membrane biological reaction device comprises:
an anaerobic membrane bioreactor in which an anaerobic reaction occurs; and
and the filtering unit is arranged outside the anaerobic membrane bioreactor.
In some embodiments of the utility model, the filtering unit is provided with a filtering water outlet and a filtering return port, the filtering water outlet is connected with the intermediate regulating water tank, and the filtering return port is communicated with the anaerobic membrane bioreactor;
in some embodiments of the present invention, the filtration unit comprises an ultrafiltration membrane and a circulation pump.
In some embodiments of the present invention, the integrated membrane bioreactor comprises:
the integrated membrane bioreactor is used for carrying out biological denitrification reaction on the first wastewater;
the aeration unit is used for providing aeration for the biological denitrification reaction process;
the membrane separation unit is used for separating the wastewater after the biological denitrification reaction;
the monitoring unit is used for monitoring the parameters of the mixed liquid in the integrated membrane bioreactor; and
the time sequence control unit controls the reaction in the integrated membrane bioreactor to be carried out and/or stopped;
in some embodiments of the present invention, the monitoring unit comprises:
the ORP probe is used for monitoring the ORP value of the mixed liquid in the integrated membrane bioreactor;
the pH probe is used for monitoring the pH value of the mixed liquid in the integrated membrane bioreactor; and the dissolved oxygen probe is used for monitoring the dissolved oxygen amount of the mixed liquid in the integrated membrane bioreactor.
In some embodiments of the present invention, the biological denitrification reaction includes an anoxic stage and an aerobic stage;
in some embodiments of the present invention, when the anoxic stage starts, the control unit controls the anoxic stage to react for 60 to 90 minutes and then enters the aerobic stage;
in some embodiments of the present invention, when the aerobic phase starts, the control unit controls the aeration time of the aeration unit to be 120 to 180 minutes;
in some embodiments of the present invention, when the aerobic phase starts, the control unit controls the aerobic phase to start draining after 60 to 120 minutes from the start of the aerobic phase;
in some embodiments of the present invention, the aeration unit comprises an aeration pump and an aeration sand tray; the aeration sand tray is arranged at the bottom of the integrated membrane bioreactor;
in some embodiments of the present invention, a membrane aeration fan for reducing membrane fouling is disposed on the membrane separation unit;
in some embodiments of the present invention, the membrane separation unit is disposed within a reactor;
in some embodiments of the present invention, the membrane separation unit comprises a flat-sheet membrane module;
in some embodiments of the present invention, the integrated membrane bioreactor further comprises a stirring unit;
in some embodiments of the present invention, the integrated membrane bioreactor further comprises a second water inlet pump for wastewater to enter the reactor;
in some embodiments of the present invention, the integrated membrane bioreactor further comprises a water outlet tank for storing wastewater discharged to reach the standard, wherein the water outlet tank is connected with the water outlet of the integrated membrane bioreactor.
In some embodiments of the present invention, the wastewater treatment system further comprises a pretreatment device, wherein the pretreatment device comprises:
the pretreatment reactor is used for carrying out biochemical treatment on the wastewater to be treated;
a pretreatment aeration unit providing aeration to the reactor;
the pretreatment monitoring unit is used for monitoring the operation parameters in the pretreatment system on line in real time; and
and the preprocessing control unit controls the starting and stopping of equipment in the preprocessing system according to the data time sequence fed back by the monitoring unit in real time.
In some embodiments of the present invention, the pretreatment reactor comprises any one of a plug flow activated sludge reactor, a full hybrid activated sludge reactor, a granular sludge reactor, a membrane bioreactor;
in some embodiments of the present invention, the pretreatment monitoring unit comprises an oxidation-reduction potential sensor and a liquid level sensor disposed within the pretreatment reactor;
in some embodiments of the present invention, the pretreatment control unit controls the pretreatment aeration unit to be turned on or off according to the data monitored by the oxidation-reduction potential sensor;
in some embodiments of the present invention, the pretreatment control unit controls the start or stop of the water inlet of the pretreatment reactor according to the data monitored by the liquid level sensor;
in some embodiments of the present invention, the pre-treatment device further comprises a pre-treatment unit;
in some embodiments of the present invention, the pretreatment unit includes a primary filter and a homogeneous uniform-volume regulating water tank, and wastewater enters the homogeneous uniform-volume regulating water tank after passing through the primary filter; the homogeneous uniform-quantity regulating water tank is connected with the pretreatment reactor.
Adopt the wastewater treatment system of the utility model wastewater treatment method, include:
carrying out anaerobic reaction on the wastewater to be treated in an anaerobic membrane biological reaction device to obtain first wastewater;
and carrying out biological denitrification reaction on the first wastewater in the integrated membrane biological reaction device, thus finishing the wastewater treatment.
In some embodiments of the invention, the reaction temperature of the anaerobic reaction is 25 to 35 ℃;
in some embodiments of the invention, the pH of the anaerobic reaction is between 7.2 and 8.5;
in some embodiments of the invention, the concentration of sludge in the anaerobic reaction is 15 to 25g/L, and the organic load in the sludge is 0.25 to 0.7 kgCOD/(m)3d)；
In some embodiments of the present invention, the reaction temperature of the biological denitrification reaction is 25 to 35 ℃;
in some embodiments of the present invention, the pH of the biological denitrification reaction is from 7.2 to 8.0;
in some embodiments of the invention, the organismThe concentration of the sludge in the denitrification reaction is 6 to 10g/L, and the denitrification load of the sludge is 0.25 to 0.7 kgN/(m)3d)；
In some embodiments of the present invention, the biological denitrification reaction comprises an anoxic stage and an aerobic stage, the reaction time of the anoxic stage is 60 to 90 minutes, and the reaction time of the aerobic stage is 120 to 180 minutes;
in some embodiments of the present invention, the wastewater to be treated is fed into the integrated membrane bioreactor in a sequencing batch process.
In some embodiments of the present invention, the wastewater treatment method further comprises pretreating the wastewater to be treated and then treating the wastewater in the anaerobic membrane bioreactor;
in some embodiments of the present invention, the pretreatment method comprises subjecting the wastewater to be treated to a pretreatment aeration reaction with sludge in a pretreatment reactor.
In some embodiments of the present invention, the oxidation-reduction potential of the wastewater in the pretreatment reactor is from-300 to-250 mV;
in some embodiments of the present invention, the sludge concentration in the pretreatment reactor is 10 to 20 g/L;
in some embodiments of the present invention, the hydraulic retention time of the wastewater within the reactor is 12 to 20 hours;
in some embodiments of the present invention, the removal rate of the surfactant in the pretreated wastewater is greater than 70%.
In an exemplary embodiment, the wastewater treatment system based on an integrated membrane biological reaction device of the utility model comprises an anaerobic membrane biological reaction device, an intermediate regulating water tank and an integrated membrane biological reaction device. The anaerobic membrane biological reaction device comprises a first water inlet pump, an anaerobic membrane biological reactor, a filtering unit and a circulating pump, and the integrated membrane biological reaction device comprises a tubular membrane component, an integrated membrane biological reactor, a time sequence control unit, an aeration unit, a stirring unit, a monitoring unit and a membrane separation unit.
Wherein the tail end of the anaerobic membrane bioreactor is provided with an ultrafiltration membrane (namely a filtering unit), wastewater enters the intermediate regulating water tank through the ultrafiltration membrane, and a part of return water enters the anaerobic membrane bioreactor;
wherein the ultrafiltration membrane is made of polyvinylidene fluoride, the aperture is 500-20000 daltons, and the effective membrane area is 2-6 m2。
Wherein, the aeration unit comprises a biological aeration fan and an aeration sand tray; the aeration sand tray is arranged at the bottom of the integrated membrane bioreactor;
wherein, the monitoring unit comprises an ORP probe, a pH probe and a DO probe;
the time sequence control unit monitors and controls the running condition of the integrated membrane bioreactor in real time through the ORP probe, the pH probe and the DO probe;
wherein, the membrane separation unit is provided with a membrane aeration fan for reducing membrane pollution;
wherein the membrane separation unit is disposed within the reactor;
wherein the membrane separation unit comprises a flat membrane module.
The utility model discloses a effluent disposal system based on integral type membrane biological reaction device can also include preprocessing device, preprocessing device includes:
the pretreatment reactor is used for carrying out biochemical treatment on the wastewater to be treated;
a pretreatment aeration unit providing aeration to the pretreatment reactor;
the pretreatment monitoring unit is used for monitoring the operation parameters in the pretreatment device in real time on line; and
and the preprocessing control unit controls the starting and stopping of equipment in the preprocessing device according to the data time sequence fed back by the preprocessing monitoring unit in real time.
Wherein the pretreatment reactor comprises any one of a plug-flow activated sludge reactor, a complete mixing type activated sludge reactor, a granular sludge reactor and a membrane bioreactor;
wherein, a suspended biological filler for increasing the sludge concentration is arranged in the pretreatment reactor;
wherein the suspended biological filler is a modified biological suspended filler taking polymer plastics as a base material, the diameter of the suspended biological filler is 10 to 25 millimeters, and the relative density of the suspended biological filler is 0.97 to 1.03g/cm3。
Wherein the pretreatment aeration unit comprises an air blower;
wherein the aperture of the air outlet of the pretreatment aeration unit is 2-3 mm;
wherein the pretreatment monitoring unit comprises a pretreatment oxidation-reduction potential sensor and a pretreatment liquid level sensor which are arranged in the reactor;
wherein the pretreatment control unit controls the pretreatment aeration unit to be started or stopped according to the data monitored by the pretreatment oxidation-reduction potential sensor;
wherein the pretreatment control unit controls the starting or stopping of the water inlet of the pretreatment reactor according to the data monitored by the pretreatment liquid level sensor;
the pretreatment monitoring unit further comprises a plurality of liquid level sensors, pressure sensors and flow monitoring sensors which are arranged in the pretreatment device.
The pretreatment system also comprises a pretreatment unit;
the pretreatment unit comprises a primary filter and a homogenizing and uniform-quantity regulating water tank, and wastewater enters the homogenizing and uniform-quantity regulating water tank after passing through the primary filter; the homogeneous uniform quantity regulating water tank is connected with the reactor;
wherein the primary filter comprises a fibrous filter;
wherein the volume of the homogenizing adjusting water tank meets the adjustment of the wastewater to be treated for 16 to 24 hours.
The wastewater treatment method adopting the wastewater treatment system based on the integrated membrane biological reaction device comprises the following steps:
(1) advanced pretreatment of treated wastewater, comprising the following specific steps:
the wastewater is pretreated in a front treatment unit by primary filtration and uniform quantity and homogeneous regulation;
and conveying the pretreated wastewater to a pretreatment reactor for sufficient hydrolysis and acidification to decompose macromolecular substances in the wastewater and effectively remove most of surfactant, discharging the activated sludge in the pretreatment reactor at regular intervals, and allowing the effluent of the pretreatment reactor to enter an anaerobic membrane bioreactor for further treatment.
The pretreatment reactor comprises a pretreatment reactor main body and an external pretreatment tubular membrane assembly which are connected through a circulating pump, and the running membrane flux of the pretreatment tubular membrane assembly is 20-40L/(m)2H), the flow rate of liquid in the pretreatment tubular membrane is more than 2m/s, the hydraulic retention time in the pretreatment reactor main body is 12-20 h, the oxidation-reduction potential in the pretreatment reactor main body is controlled to be-300-250 mV, and the sludge concentration is 10-20 g/L.
(2) Continuously feeding the pretreated wastewater into an anaerobic membrane bioreactor through a first water inlet pump for anaerobic treatment, wherein the COD (chemical oxygen demand) of the fed water is 3000-13000 mg/L, and NH (hydrogen) is4 +N is 200-1700 mg/L;
(3) the temperature of the anaerobic membrane bioreactor is controlled between 25 and 35 ℃, the pH is controlled between 7.2 and 8.5, the sludge concentration of the anaerobic membrane bioreactor is 15 to 25g/L, and the organic load of the inlet water is controlled between 0.25 and 0.7kgCOD/· (m)3d) HRT (hydraulic retention time) between 13 and 37.5 hours;
(4) filtering the wastewater treated in the anaerobic membrane bioreactor through an ultrafiltration membrane, wherein the aperture of the ultrafiltration membrane is 500-20000 daltons;
(5) the filtered wastewater enters an intermediate regulating water tank;
(6) the water in the intermediate regulating water tank enters a subsequent integrated membrane bioreactor for biological denitrification reaction treatment, and the reaction temperature of the nitrification and denitrification reaction (namely the biological denitrification reaction) is 25-35 ℃; the pH value of the short-cut nitrification and denitrification reaction is 7.2 to 8.0; the sludge concentration is 6 to 10g/L, and the nitrogen load in the sludge is 0.25 to 0.7 kgN/(m)3d)；
The method comprises the following steps:
a water inlet stage: starting the stirrer, the second water inlet pump and the membrane aeration fan, and feeding water in a sequencing batch manner, whereinThe input flow rate can be 16-30L/min, and the design throughput can be 0.5-1m3Period, inputting the wastewater to be treated into the integrated membrane bioreactor, and closing the second water inlet pump;
and (3) hypoxia stage: organic matters in the wastewater are used as a carbon source to provide electrons for reduction of nitrate nitrogen and nitrite nitrogen in the anoxic stage; under the full stirring action of the stirrer, nitrate nitrogen in the wastewater is reduced into nitrite nitrogen, and the nitrite nitrogen is reduced into nitrogen; the organic matters in the wastewater are used as a carbon source to provide electrons for the reduction of nitrate nitrogen and nitrite nitrogen in the anoxic stage; in the anoxic stage, the time sequence control unit controls the stirring time to be 60-90 min, the denitrification is judged to be completed, the anoxic stage is ended, and the aerobic stage is started;
an aerobic stage: starting an aeration fan, oxidizing ammonia nitrogen and organic matters in the wastewater, wherein the ammonia nitrogen is oxidized into nitrite nitrogen, and the nitrite nitrogen is oxidized into nitrate nitrogen; in the aerobic stage, according to a time control program, aeration energy consumption is reasonably reduced by optimizing aeration time, and treatment cost is reduced; the time sequence control unit controls the aeration time of the biological aeration fan to be 120-180 minutes, finishes the aeration process, judges that the nitrification is finished and finishes the aerobic stage;
wherein, the membrane aeration flow rate can be 5-15L/min, the input flow rate can be 0.3-1L/min, and the designed treatment capacity can be 0.5-2L/period.
A drainage stage: and starting a water outlet pump 60-120min after the aerobic stage starts, wherein the water outlet pump is used for continuous suction, the wastewater with the designed treatment capacity is filtered by a membrane in the membrane module (membrane separation unit) and then discharged, and the water outlet pump and the aeration pump are sequentially closed.
And the monitoring unit is started in the whole process, and detects the potential, the pH value and the dissolved oxygen of the oxidation-reduction electrode in the high-concentration wastewater.
The technical solution of the present invention is further explained by the following specific embodiments with reference to the attached drawings. It should be noted that the following specific examples are only illustrative, and the scope of the present invention is not limited thereto.
The test methods used in the following examples are all conventional methods unless otherwise specified.
Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
The wastewater treatment system of the anaerobic membrane bioreactor-integral membrane bioreactor combined process adopted in the following examples, as shown in fig. 1 and 2, comprises a pretreatment device, an anaerobic membrane bioreactor and an integral membrane bioreactor, wherein,
the pretreatment device comprises a primary filter 501, a regulating water tank 502, a pretreatment water inlet pump 503, a pretreatment reactor 504, a circulating pump 505, a pretreatment membrane module 506, a pretreatment ORP sensor 507, a sludge pump 508, an electromagnetic valve 509 and a blower 510.
Wherein, primary filter 501 is inside and outside bilayer structure, and the skin is stainless steel casing, and the inlayer is can put forward formula stainless steel filter screen, and mesh diameter is 2 ~ 4mm, and at the water inlet end, inlayer and skin are by nozzle stub intercommunication, mainly used filter fibre such as hair. The primary filter 501 is connected to a conditioning water tank 502 by a pipe.
The adjusting water tank 502 is used for homogenizing and uniformly adjusting the wastewater, the volume of the adjusting water tank is designed to have an adjusting time range of 16-24h for wastewater, the adjusting water tank has a conventional structure in the technical field, and a low-speed stirring device is arranged inside the adjusting water tank to homogenize and stir the wastewater.
The primary filter 501 and the conditioning water tank 502 as the pretreatment unit include, but are not limited to, the above-described structure as long as the structure can perform the functions of filtering and mean value average quantity adjustment.
The adjusting water tank 502 is connected with the pretreatment reactor 504 through a pretreatment water inlet pump 503, the pretreatment reactor 504 is a complete mixing type reactor using hydraulic stirring in the embodiment, and is a split type membrane bioreactor, and comprises the pretreatment reactor 504 and an external pretreatment membrane module 506 which are connected through a circulating pump 505, in the embodiment, the pretreatment membrane module 506 is an internal pressure type ultrafiltration or microfiltration membrane module, a water outlet of the pretreatment membrane module 506 comprises a water producing port and a circulating port, the water producing port is connected to a subsequent treatment unit (configured as required according to a water outlet standard) through a pipeline, and the circulating port is connected to the pretreatment reactor 504 through a pipeline. The utility model discloses a preprocessing device uses production biogas as the purpose, consequently does not possess the condition that uses biogas to erode the membrane module, and adopts split type membrane bioreactor, through the high-speed washing away of the interior mixed liquid of membrane module, can reach the purpose that effective control membrane pollutes.
The pretreatment reactor 504 is connected with a micro-aeration unit, which comprises an air blower 510 and an electromagnetic valve 509 and can provide micro fresh air into the pretreatment reactor 504, and the aeration amount is controlled to control the Oxidation Reduction Potential (ORP) of the wastewater in the pretreatment reactor 504 to be-300 mV to-250 mV.
The pretreatment ORP sensor 507 is immersed below the liquid level of the pretreatment reactor 504 and monitors the oxidation-reduction potential of the wastewater within the pretreatment reactor 504.
Excess sludge in the pretreatment reactor 504 is discharged by a sludge pump 508 at a set sludge retention time.
Suspended biological fillers can be added into the pretreatment reactor 504 as required, the filling volume accounts for 20-70% of the working volume of the reactor, the suspended biological fillers are modified biological suspended fillers taking high polymer plastics as a base material, the diameter is 10-25 mm, and the relative density is 0.97-1.03 g/cm3。
The pretreatment ORP sensor 507 is part of a pretreatment monitoring unit in the pretreatment unit, which may also include a plurality of level sensors, pressure sensors, flow monitoring sensors, etc. disposed within each unit or device within the pretreatment reactor 504.
Further, the pretreatment monitoring unit is connected with a pretreatment control unit, and the pretreatment control unit performs interlocking control on the opening and closing of the pretreatment water inlet pump 503, the blower 510 or the electromagnetic valve 509 or performs time sequence control on the opening and closing of the pretreatment water inlet pump 503, the blower 510 or the electromagnetic valve 509 according to a monitoring signal of the pretreatment monitoring unit, so that high automation is realized, the whole operation is facilitated, the maintenance workload is reduced, and specifically, for example, the opening and closing of the blower 510 and the electromagnetic valve 509 can be controlled according to a monitoring value of the pretreatment ORP sensor 507.
The anaerobic membrane biological reaction device comprises: a first water inlet pump 101, an anaerobic membrane bioreactor 100, a circulating pump 103 and an ultrafiltration membrane component 104. The first water inlet pump 101 is connected with the anaerobic membrane bioreactor 100, the anaerobic membrane bioreactor 100 is connected with a circulating pump 103 and a return pipe of an ultrafiltration membrane 104, the circulating pump 103 is connected with the ultrafiltration membrane 104, and the ultrafiltration membrane 104 is connected with the intermediate adjusting water tank 200.
The integrated membrane biological reaction device comprises: the system comprises a second water inlet pump 301, a DO probe 304, a PH probe 305, an ORP probe 306, an integrated membrane bioreactor 300, a time sequence control unit 311 and an aeration sand tray 303, wherein the second water inlet pump 301 is connected with an intermediate regulating water tank 200, the integrated membrane bioreactor 300 is connected with the second water inlet pump 301, and the time sequence control unit 311 monitors the running condition in the integrated membrane bioreactor 300 in real time through the DO probe 304, the PH probe 305 and the ORP probe 306.
In this embodiment, the inlet water is continuously fed into the anaerobic membrane bioreactor 100 through the first inlet pump 101. The effluent of the anaerobic membrane bioreactor 100 enters an ultrafiltration membrane 104 for filtration through a circulating pump 103, the return water of the ultrafiltration membrane 104 enters the anaerobic membrane bioreactor 100, and the filtered water enters an intermediate regulating water tank 200. The wastewater in the intermediate conditioning water tank 200 intermittently enters the integrated membrane bioreactor 300 through the second water inlet pump 301. The time sequence control unit 311 monitors the running condition in the integrated membrane bioreactor 300 in real time through the DO probe 304, the PH probe 305 and the ORP probe 306, and finally achieves the aim of nitrification and denitrification nitrogen removal by controlling the reaction process by using time.
Example 1
In this embodiment, the water inlet flow of the anaerobic membrane bioreactor is 7m3D, organic loading rate 1.3 (kg/m)3D), the hydraulic retention time is 3.5d, and the sludge retention time is 80 days; ammonia nitrogen inlet load of integrated membrane bioreactor is 0.2 (kg/m)3And d), the sludge retention time is 13 d.
The concentration and removal rate of pollutants in the wastewater before and after the treatment by the above steps are shown in table 1.
TABLE 1 results of wastewater treatment runs
ND: not detected out
As can be seen from the data in Table 1, after the wastewater is treated, the removal rate of COD reaches 96 percent, and the removal rate of NH reaches4 +The removal rate of-N reaches 97.8 percent, which shows that the wastewater treatment method based on the integrated membrane biological reaction device has better treatment effect on pollutants.
Example 2
In this embodiment, the water inlet flow of the anaerobic membrane bioreactor is 9m3D, organic Loading ratio 1.6 (kg/m)3(d), the hydraulic retention time is 3.1d, and the sludge retention time is 80 days; ammonia nitrogen inlet load of integrated membrane bioreactor is 0.3 (kg/m)3And d) the sludge retention time is 19 d.
The concentration and removal rate of pollutants in the wastewater before and after the treatment by the above steps are shown in Table 2.
TABLE 2 results of wastewater treatment runs
As can be seen from the data in Table 2, after the wastewater is treated, the removal rate of COD reaches 95.5 percent and the removal rate of NH reaches 95.5 percent4 +The N removal rate reaches 98.5 percent, which shows that the wastewater treatment method based on the integrated membrane biological reaction device has better treatment effect on pollution.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A wastewater treatment system based on an integrated membrane biological reaction device, comprising:
the anaerobic membrane biological reaction device is used for generating anaerobic reaction in the wastewater to be treated to obtain first wastewater;
the middle adjusting water tank is connected with a water outlet of the anaerobic membrane biological reaction device and is used for adjusting the first wastewater; and
the integrated membrane biological reaction device is used for performing biological denitrification reaction on the first wastewater to obtain standard wastewater.
2. The wastewater treatment system according to claim 1,
the anaerobic membrane biological reaction device comprises:
an anaerobic membrane bioreactor in which an anaerobic reaction occurs; and
and the filtering unit is arranged outside the anaerobic membrane bioreactor.
3. The wastewater treatment system according to claim 2,
the filtering unit is provided with a filtering water outlet and a filtering backflow port, the filtering water outlet is connected with the intermediate regulating water tank, and the filtering backflow port is communicated with the anaerobic membrane bioreactor;
wherein the filtration unit comprises an ultrafiltration membrane and a circulation pump.
4. The wastewater treatment system according to claim 1,
the integrated membrane biological reaction device comprises:
the integrated membrane bioreactor is used for carrying out biological denitrification reaction on the first wastewater;
the aeration unit is used for providing aeration for the biological denitrification reaction process;
the membrane separation unit is used for separating the wastewater after the biological denitrification reaction;
the monitoring unit is used for monitoring the parameters of the mixed liquid in the integrated membrane bioreactor; and
and the time sequence control unit controls the reaction in the integrated membrane bioreactor to be carried out and/or stopped.
5. The wastewater treatment system according to claim 4,
the monitoring unit includes:
the ORP probe is used for monitoring the ORP value of the mixed liquid in the integrated membrane bioreactor;
the pH probe is used for monitoring the pH value of the mixed liquid in the integrated membrane bioreactor; and
and the dissolved oxygen probe is used for monitoring the dissolved oxygen amount of the mixed liquid in the integrated membrane bioreactor.
6. The wastewater treatment system according to claim 4,
the biological denitrification reaction comprises an anoxic stage and an aerobic stage;
when the anoxic stage starts, the control unit controls the anoxic stage to react for 60 to 90 minutes and then enters the aerobic stage;
when the aerobic period starts, the control unit controls the aeration time of the aeration unit to be 120 to 180 minutes;
when the aerobic period starts, the control unit controls the aerobic period to start draining after 60 to 120 minutes.
7. The wastewater treatment system according to claim 4,
the aeration unit comprises an aeration pump and an aeration sand tray; the aeration sand tray is arranged at the bottom of the integrated membrane bioreactor;
the membrane separation unit is provided with a membrane aeration fan for reducing membrane pollution;
the membrane separation unit is arranged in the reactor;
the membrane separation unit comprises a flat membrane module;
the integrated membrane biological reaction device also comprises a stirring unit;
the integrated membrane biological reaction device also comprises a second water inlet pump for wastewater to enter the reactor;
the integrated membrane biological reaction device also comprises a water outlet tank for storing the wastewater discharged after reaching the standard, and the water outlet tank is connected with a water outlet of the integrated membrane biological reactor.
8. The wastewater treatment system according to claim 1,
the wastewater treatment system further comprises a pretreatment device, wherein the pretreatment device comprises:
the pretreatment reactor is used for carrying out biochemical treatment on the wastewater to be treated;
a pretreatment aeration unit providing aeration to the reactor;
the pretreatment monitoring unit is used for monitoring the operation parameters in the pretreatment system on line in real time; and
and the preprocessing control unit controls the starting and stopping of equipment in the preprocessing system according to the data time sequence fed back by the monitoring unit in real time.
9. The wastewater treatment system according to claim 8,
the pretreatment reactor comprises any one of a plug-flow activated sludge reactor, a complete mixed activated sludge reactor, a granular sludge reactor and a membrane bioreactor;
the pretreatment monitoring unit comprises an oxidation-reduction potential sensor and a liquid level sensor which are arranged in the pretreatment reactor;
the pretreatment control unit controls the pretreatment aeration unit to be started or stopped according to the data monitored by the oxidation-reduction potential sensor;
and the pretreatment control unit controls the starting or stopping of the water inlet of the pretreatment reactor according to the data monitored by the liquid level sensor.
10. The wastewater treatment system according to claim 8,
the pretreatment device also comprises a pretreatment unit;
the pretreatment unit comprises a primary filter and a homogenizing and uniform-quantity regulating water tank, and wastewater enters the homogenizing and uniform-quantity regulating water tank after passing through the primary filter; the homogeneous uniform-quantity regulating water tank is connected with the pretreatment reactor.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111087134A (en) * | 2020-01-16 | 2020-05-01 | 中国科学院生态环境研究中心 | Wastewater treatment system and method based on integrated membrane biological reaction device |
| CN114906930A (en) * | 2021-02-08 | 2022-08-16 | 清华大学 | Water treatment system |
| CN111087134B (en) * | 2020-01-16 | 2024-05-10 | 中国科学院生态环境研究中心 | Wastewater treatment system and method based on integrated membrane biological reaction device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111087134A (en) * | 2020-01-16 | 2020-05-01 | 中国科学院生态环境研究中心 | Wastewater treatment system and method based on integrated membrane biological reaction device |
| CN111087134B (en) * | 2020-01-16 | 2024-05-10 | 中国科学院生态环境研究中心 | Wastewater treatment system and method based on integrated membrane biological reaction device |
| CN114906930A (en) * | 2021-02-08 | 2022-08-16 | 清华大学 | Water treatment system |
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