CN112047585A - VFL sewage treatment equipment - Google Patents
VFL sewage treatment equipment Download PDFInfo
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- CN112047585A CN112047585A CN202011055581.0A CN202011055581A CN112047585A CN 112047585 A CN112047585 A CN 112047585A CN 202011055581 A CN202011055581 A CN 202011055581A CN 112047585 A CN112047585 A CN 112047585A
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- 239000010865 sewage Substances 0.000 title claims abstract description 98
- 239000010802 sludge Substances 0.000 claims abstract description 51
- 238000012544 monitoring process Methods 0.000 claims abstract description 23
- 238000005273 aeration Methods 0.000 claims description 66
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 55
- 238000010992 reflux Methods 0.000 claims description 27
- 230000001502 supplementing effect Effects 0.000 claims description 9
- 239000012528 membrane Substances 0.000 claims description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims description 5
- 239000011574 phosphorus Substances 0.000 claims description 5
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 17
- 230000008569 process Effects 0.000 abstract description 15
- 238000012423 maintenance Methods 0.000 description 10
- 238000004062 sedimentation Methods 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 244000005700 microbiome Species 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 206010021143 Hypoxia Diseases 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 2
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000033116 oxidation-reduction process Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000003911 water pollution Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 230000009615 deamination Effects 0.000 description 1
- 238000006481 deamination reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention provides VFL sewage treatment equipment which comprises an anaerobic zone, an anoxic zone, an aerobic zone, a settling zone and a control system for controlling sludge to flow in the anaerobic zone, the anoxic zone, the aerobic zone and the settling zone, wherein the anaerobic zone, the anoxic zone, the aerobic zone and the settling zone are sequentially connected. The VFL sewage treatment equipment provided by the invention adopts an automatic operation mode, the operation process is completely and automatically controlled and completed by the control unit according to the data collected by the online monitoring unit, the operation process is automatic in the whole process, manual interference is not needed, and in the operation process of the equipment, professional technicians are not needed to perform manual operation, so that the labor is saved, and the operation cost is reduced.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to VFL sewage treatment equipment.
Background
China is a large water-consuming country, but the water pollution is also very serious. At present, most local sewage is collected and treated in a centralized collection and treatment mode, but residential areas such as residential districts and rural gathering areas built by remote industrial and mining enterprises and towns are far away, and domestic sewage generated by the urban and rural sewage treatment plants is far away from the urban and urban sewage treatment plants and can only adopt simple sewage treatment modes such as septic tanks and the like, so that the standard of reuse water cannot be met. Especially, the construction of sewage treatment facilities and pipe networks in vast rural areas and small towns in China is seriously lagged, a large amount of sewage is incompletely treated, even no treated domestic sewage is directly discharged, great burden is caused on the local water resource ecological environment, the sewage treatment facility is one of the reasons why drinking water of rural population in China does not reach the standard, and the occurrence and propagation of certain epidemic diseases are easily caused. The discharge of rural domestic sewage is the main reason for the eutrophication of rivers and lakes and the deterioration of water environment.
Biological sewage treatment is a common sewage treatment method, which utilizes the metabolic growth of microorganisms to decompose and oxidize organic matters in a dissolved or colloidal state into stable inorganic substances so as to purify sewage. Traditional biological method sewage treatment device mainly comprises anaerobism pond, the oxygen deficiency pond, good oxygen pond and sedimentation tank, wherein, anaerobism pond and oxygen deficiency bottom of the pool portion are equipped with dive mixer, dive mixer is continuous operation usually for preventing activated sludge deposit, good oxygen bottom of the pool portion is equipped with aeration equipment, provide the aeration by the fan, aeration fan is continuous operation usually, the bottom still is equipped with nitrifying liquid backwash pump, flow back good oxygen pond mud to the oxygen deficiency pond, the sedimentation tank carries out mud-water separation, the bottom of the pool is equipped with the mud backwash pump, flow back to the anaerobism pond sediment mud. For guaranteeing normal operation, the traditional integrated sewage treatment equipment needs 2 submersible mixers, 1 fan and 2 reflux pumps at least.
However, above-mentioned sewage treatment device is because aeration pipe and dive agitator motor install in the pond for sewage treatment device construction cost risees, needs unscheduled maintenance to it simultaneously, and first-selected needs will shift out the activated sludge in each pond during overhaul and maintenance of equipment, perhaps take out dive agitator motor from the pond in, maintain again, and the maintenance operation is complicated, and has increased the maintenance cost of equipment, has seriously reduced sewage treatment device's rate of utilization. Meanwhile, the maintenance of the sewage treatment facility needs professional technical management personnel, and the problems of low management level, large fluctuation of sewage treatment effect, difficult maintenance and the like are caused by the lack of the professional technical management personnel and the like. So that the water pollution of villages and towns in China cannot be effectively controlled.
Disclosure of Invention
The present invention has been made to solve the above problems, and an object of the present invention is to provide a VFL sewage treatment apparatus.
The technical scheme for realizing the purpose of the invention is as follows: the invention provides VFL sewage treatment equipment, which is characterized by comprising the following technical steps: the treatment equipment comprises an anaerobic zone, an anoxic zone, an aerobic zone, a sedimentation zone and a control system for controlling sewage to flow in the anaerobic zone, the anoxic zone, the aerobic zone and the sedimentation zone which are sequentially connected.
The VFL sewage treatment equipment provided by the invention also has the following characteristics: the control system includes:
the aeration unit is used for controlling the aeration of the aerobic tank;
a reflux unit for controlling reflux among the anaerobic zone, the anoxic zone, the aerobic zone and the settling zone;
the online monitoring unit is arranged in the anaerobic zone, the anoxic zone, the aerobic zone and the sedimentation zone and is used for monitoring the working data of the anaerobic zone, the anoxic zone, the aerobic zone and the sedimentation zone;
and the control unit is connected with the aeration unit, the backflow unit and the online monitoring unit and used for receiving the working data monitored by the online monitoring unit and generating a working command for controlling the aeration unit and the backflow unit.
The VFL sewage treatment equipment provided by the invention also has the following characteristics: the aeration unit includes:
the aeration device is arranged in the aerobic zone and is used for aeration;
and the fan is connected with the aeration device and used for providing gas for the aeration device.
The VFL sewage treatment equipment provided by the invention also has the following characteristics: the reflux unit comprises one or more selected from the following reflux streams: used for increasing the backflow of the sludge circulation at the water inlet end; the return flow of sludge circulation for completing the biological phosphorus removal of the system; the return flow of the sludge circulation for completing the biological denitrification of the system; a reflux for increasing the sludge concentration in the front section of the anoxic zone; the backflow device is used for supplementing the sludge concentration of the anoxic zone, the backflow device is used for supplementing the sludge concentration of the aerobic zone and the backflow device is used for discharging the residual sludge of the system.
The VFL sewage treatment equipment provided by the invention also has the following characteristics: the control system also comprises a valve group box, and the valve group box is connected with the aeration unit, the backflow unit and the control unit and is used for executing working commands sent by the control unit.
The VFL sewage treatment equipment provided by the invention also has the following characteristics: the control unit controls the aeration intensity and the aeration time of the aeration unit and the reflux intensity and the reflux time of the reflux unit.
The VFL sewage treatment equipment provided by the invention also has the following characteristics: the control unit adjusts the aeration period and intensity and the reflux periods and intensities through the measurement data of the online measurement equipment.
The VFL sewage treatment equipment provided by the invention also has the following characteristics: the shape of the treatment apparatus in which the anaerobic zone, the anoxic zone, the aerobic zone and the settling zone are combined includes one selected from the group consisting of a circle, an ellipse, a square and a polygon.
The VFL sewage treatment equipment provided by the invention also has the following characteristics: the equipment is circular, and the anaerobic zone and the anoxic zone are arranged at the outermost periphery; the aerobic zone is of two semicircular structures and is arranged between the anaerobic zone and the anoxic zone; the settling zone is disposed centrally between the two aerobic zones.
The VFL sewage treatment equipment provided by the invention also has the following characteristics: a plurality of upper baffle plates and lower baffle plates are arranged in the anaerobic zone, the upper baffle plates and the lower baffle plates are alternately arranged in the anaerobic zone, and the lower ends of the upper baffle plates are fixedly connected with the bottom of the anaerobic zone, so that the upper ends of the upper baffle plates form an upper circulation channel of sewage; the lower end of the lower baffle plate is spaced from the bottom of the anaerobic zone, so that a lower circulation channel for sewage is formed at the lower end of the lower baffle plate.
The VFL sewage treatment equipment provided by the invention also has the following characteristics: a plurality of upper baffle plates and lower baffle plates are arranged in the anoxic zone, the upper baffle plates and the lower baffle plates are alternately arranged in the anoxic zone, and the lower ends of the upper baffle plates are fixedly connected with the bottom of the anoxic zone, so that the upper ends of the upper baffle plates form an upper circulation channel of sewage; the lower end of the lower baffle plate is spaced from the bottom of the anoxic zone, so that a lower circulation channel for sewage is formed at the lower end of the lower baffle plate.
The VFL sewage treatment equipment provided by the invention also has the following characteristics: an upper baffle plate is arranged between the anoxic zone and the aerobic zone, and sewage enters the aerobic zone from an upper channel.
The VFL sewage treatment equipment provided by the invention also has the following characteristics: the tail end of the settling zone is provided with a mud-water separator and a water outlet groove.
The VFL sewage treatment equipment provided by the invention also has the following characteristics: the mud-water separator is in an inverted cone shape, the bottom of the mud-water separator faces upwards, the conical top of the mud-water separator is connected with the bottom of the settling zone, the side wall of the mud-water separator is provided with a trapezoidal hole, a baffle is arranged outside the hole, and the baffle and the side wall have a certain angle for the sludge in the aerobic tank to enter.
The VFL sewage treatment equipment provided by the invention also has the following characteristics: the mud-water separator is made of a PP plate or a carbon steel plate.
The VFL sewage treatment equipment provided by the invention also has the following characteristics: the water outlet groove is arranged at the upper part of the mud-water separator.
Compared with the prior art, the invention has the beneficial effects that:
1. the VFL sewage treatment equipment provided by the invention adopts an automatic operation mode, the operation process is completely and automatically controlled and completed by the control unit according to the data collected by the online monitoring unit, the operation process is automatic in the whole process, manual interference is not needed, and in the operation process of the equipment, professional technicians are not needed to perform manual operation, so that the labor is saved, and the operation cost is reduced.
2. The VFL sewage treatment equipment provided by the invention can complete all sewage treatment processes by only 1 fan, and compared with the traditional equipment, a plurality of power equipment are reduced.
3. The VFL sewage treatment equipment provided by the invention can complete all sewage treatment processes by only 1 fan, solves the problem of irregular maintenance and repair of an aeration pipe and a submersible stirring motor which are arranged in a pool in the prior art, reduces the maintenance and repair cost, solves the problem of dependence on professional technicians required for maintenance in the prior art, and further reduces the cost.
4. The running mode of the fan of the VFL sewage treatment equipment provided by the invention is program control, 4 groups of running programs are arranged in the VFL sewage treatment equipment, the aeration intensity and duration of the 4 groups of automatic running programs are continuously adjusted by detecting the numerical value through the online monitoring unit, manual operation of personnel is not needed in the running of the equipment, the automation degree is high, and the VFL sewage treatment equipment is more intelligently controlled on the premise of ensuring the treatment effect of the equipment.
Drawings
FIG. 1 is a schematic structural diagram of a VFL sewage treatment plant with a circular tank shape according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a VFL sewage treatment plant with a square tank shape according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a VFL sewage treatment plant of oval tank type according to an embodiment of the present invention;
wherein, 1: an anaerobic zone; 2: an anoxic zone; 3: an aerobic zone; 4: a settling zone; 5: an aeration film; 6: a water outlet groove; 7: a valve group box; 8: a fan; 9: an electric control cabinet; 10: an upper baffle plate; 11: a lower baffle plate; 12: a device room; 13: a mud-water separator; 14: and an online monitoring unit.
Detailed Description
The invention will be further described with reference to the following drawings and specific embodiments, and the advantages and features of the invention will become more apparent as the description proceeds. These examples are illustrative only and do not limit the scope of the present invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications may be made without departing from the spirit and scope of the invention.
In the description of the present embodiments, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
As shown in figure 1, the VFL sewage treatment equipment has the following technical characteristics: the treatment equipment comprises an anaerobic zone 1, an anoxic zone 2, an aerobic zone 3, a settling zone 4 and a control system for controlling sewage to flow in the anaerobic zone 1, the anoxic zone 2, the aerobic zone 3 and the settling zone 4 which are sequentially connected. The device is circular, and the anaerobic zone 1 and the anoxic zone 2 are arranged at the outermost periphery; the aerobic zone 3 is of two semicircular structures and is arranged between the anaerobic zone 1 and the anoxic zone 2; the settling zone 4 is disposed intermediate the two aerobic zones 3.
The control system comprises an aeration unit, a reflux unit, an online monitoring unit and a control unit.
The aeration unit is used for controlling the aeration of the aerobic tank and comprises an aeration device and a fan 8. The aeration device comprises an aeration pipe and an aeration film 5, and the aeration film 5 and the aeration pipe are evenly paved at the bottom of the aerobic zone 3. The air volume for aeration is generated by the fan 8. The aeration pipe is a channel for transmitting air quantity, and aerates from the outlet of the fan to the aeration membrane 5. The aeration membrane 5 is a plastic membrane with micropores and can generate micro air bubbles, the aeration membrane 5 is sleeved outside the aeration pipe with the holes, and aeration air quantity passes through the holes and is transmitted out of the micropores of the aeration membrane for aeration.
The reflux unit is used for controlling reflux among the anaerobic zone 1, the anoxic zone 2, the aerobic zone 3 and the sedimentation zone 4. The backflow unit is used for increasing the backflow of sludge circulation at the water inlet end; the return flow of sludge circulation for completing the biological phosphorus removal of the system; the return flow of the sludge circulation for completing the biological denitrification of the system; a reflux for increasing the sludge concentration in the front section of the anoxic zone; the backflow device is used for supplementing the sludge concentration of the anoxic zone, the backflow for supplementing the sludge concentration of the aerobic zone and the backflow for discharging excess sludge of the system.
The backflow device is used for supplementing the backflow of the sludge concentration of the anaerobic zone, completing the backflow of the sludge circulation of the biological phosphorus removal of the system, simultaneously increasing the sludge circulation quantity of the water inlet end, reducing the load of the water inlet end and increasing the shock resistance of the VFL process. The reflux for increasing the sludge concentration of the front section of the anoxic zone and the reflux for supplementing the sludge amount of the anoxic zone increase the sludge concentration of the anoxic zone. The device is used for completing the sludge circulation reflux of the biological denitrification of the system, and enhances the denitrification effect of microorganisms. Is used for supplementing the backflow of the sludge concentration in the aerobic zone, and enhances the phosphorus source absorption and nitrification of microorganisms. The device is used for the backflow of the residual sludge of the discharge system, so that the activated sludge in the device is maintained in a certain range.
And the online monitoring unit 14 is arranged in the aerobic zone 3 and is used for monitoring the working data of the aerobic zone 3. The operating data of the aerobic zone 3 is the ORP value, i.e., the oxidation-reduction potential.
And the control unit is connected with the aeration unit, the backflow unit and the online monitoring unit 14, and is used for receiving the working data monitored by the online monitoring unit 14 and generating a working command for controlling the aeration unit and the backflow unit. The control unit comprises an aeration program, a U circulation program, a return sludge circulation program and an N circulation program. The aeration program controls aeration of the aerobic zone 3, a U circulation program, a return sludge circulation program and an N circulation program for controlling different refluxes.
And in the cycle time periods of the aeration program, the U-cycle program, the return sludge cycle program and the N-cycle program, each cycle period is provided with a working period with a fixed length and at least one algorithm period, and the algorithm period depends on the measurement data of the online monitoring unit 14. The intensity and duration of each cycle period is selected during a time period based on the operational data monitored by the on-line monitoring unit 14.
The working process is as follows:
the sewage to be treated sequentially enters an anaerobic zone 1, an anoxic zone 2, an aerobic zone 3 and a settling zone 4 to carry out biological deamination and dephosphorization treatment, the microorganisms convert ammonia nitrogen in the sewage into nitrate nitrogen or nitrite nitrogen under aerobic conditions, the microorganisms convert the nitrate nitrogen and the nitrite nitrogen into nitrogen under anoxic conditions, and the nitrogen escapes from the water surface to finish denitrification. The dissolved oxygen in water in the anaerobic zone 1 is less than 0.2mg/L, the dissolved oxygen in water in the anoxic zone 2 is less than 0.5mg/L, and the dissolved oxygen in water in the aerobic zone 3 is more than 2 mg/L. An online monitoring unit 13 arranged in the aerobic zone 3 monitors ORP value, namely oxidation-reduction potential, and after transmitting the ORP value to the control unit, the control unit generates different working commands to control the work of an aeration program, a U circulation program, a return sludge circulation program and an N circulation program. The aeration device which is paved at the bottom of the aerobic zone 3 and controlled by the aeration program works, the U circulation program, the return sludge circulation program and the N circulation program are controlled by the return unit to return.
In the embodiment, the control unit is arranged, the operation program is automatically controlled and completed by the control unit according to the data collected by the online monitoring unit, the whole operation process is automatic, manual interference is not needed, and in the operation process of the equipment, professional technicians do not need to be equipped for manual operation, so that the labor is saved, and the operation cost is reduced. And the operation mode is program control, 4 groups of operation programs are arranged in the device, the aeration intensity and duration of the 4 groups of automatic operation programs are continuously adjusted by detecting the numerical value through the online monitoring unit, manual operation of personnel is not needed in the operation of the device, and the automation degree is high. And the running period between the programs is calculated by the working data obtained by on-line monitoring, different programs are carried out in different time, the fan 8 can be effectively utilized, the fan 8 is prevented from doing useless work, and therefore energy consumption is saved.
In another embodiment of the present invention, based on the above embodiment, the control system of a VFL sewage treatment plant further comprises a valve assembly box 7, wherein the valve assembly box 7 is used for executing an aeration program, a U-cycle program, a return sludge cycle program and an N-cycle program. And the valve group box 7 also comprises valves with different strengths arranged on each return pipeline and each aeration pipeline, and when the valve group box 7 executes working commands generated by the aeration program, the U-cycle program, the return sludge cycle program and the N-cycle program, the valves are opened and closed and are used for controlling the strength and time of aeration and return.
In the above embodiment, the valve group box 7 is arranged in the control system, so that execution of each program in the control system can be better executed, and valves with different strengths are arranged, so that the fan 8 can be utilized to the greatest extent, and the fan 8 is prevented from doing useless work.
In another embodiment of the present invention, as shown in fig. 2, based on any of the above embodiments, the treatment equipment combining the anaerobic zone 1, the anoxic zone 2, the aerobic zone 3 and the settling zone 4 is square in shape. A plurality of upper baffle plates 10 and lower baffle plates 11 are arranged in the anaerobic zone 1, the upper baffle plates 10 and the lower baffle plates 11 are alternately arranged in the anaerobic zone 1, and the lower ends of the upper baffle plates 10 are fixedly connected with the bottom of the anaerobic zone 1, so that the upper ends of the upper baffle plates 10 form an upper circulation channel of sewage; the lower end of the lower baffle plate 11 is spaced from the bottom of the anaerobic zone 1, so that the lower end of the lower baffle plate 11 forms a lower circulation channel for sewage. A plurality of upper baffle plates 10 and lower baffle plates 11 are arranged in the anoxic zone 2, the upper baffle plates 10 and the lower baffle plates 11 are alternately arranged in the anoxic zone 1, and the lower ends of the upper baffle plates 10 are fixedly connected with the bottom of the anoxic zone 1, so that the upper ends of the upper baffle plates 10 form an upper circulation channel of sewage; the lower end of the lower baffle plate 11 is spaced from the bottom of the anoxic zone 1, so that the lower end of the lower baffle plate 11 forms a lower circulation channel for sewage.
In the embodiment, the upper baffle plate and the lower baffle plate are alternately arranged between the anaerobic zone 1 and the anoxic zone 2 according to the content of dissolved oxygen, the liquid level heights between the adjacent baffle plates are different due to the alternate arrangement of the upper baffle plate and the lower baffle plate, and the liquid level heights are sequentially reduced along the water flow direction, so that sewage flows up and down along the upper gap and the lower gap which flow out from the baffle plates sequentially by utilizing the pressure generated by the liquid level height difference, and activated sludge can not be precipitated. Meanwhile, denitrification and dephosphorization in the sewage treatment process are completed by matching with a backflow procedure, a stirrer does not need to be arranged underwater for stirring a water body, and the difficulty of equipment maintenance and repair is reduced. And the processing equipment with the square structure is more beneficial to transportation and is suitable for remote areas needing transportation.
In another embodiment of the invention, on the basis of any one of the above embodiments in which the tank type is square, the end of the settling tank of the VFL sewage treatment equipment provided by the invention is provided with a mud-water separator 13, a sludge return device arranged at the bottom of the mud-water separator 13 and a water outlet tank 6. The mud-water separator 13 is in an inverted cone shape, the bottom of the mud-water separator faces upwards, the conical top of the mud-water separator is connected with the bottom of the sedimentation area, the side wall of the mud-water separator is provided with a trapezoidal hollow hole, a baffle is arranged outside the hole, and the baffle and the side wall of the mud-water separator have a certain angle for the sludge in the aerobic area 3 to enter. The mud-water separator is a PP plate or a carbon steel plate. The water outlet groove is arranged at the upper part of the mud-water separator 13, the water outlet groove 6 is strip-shaped, and the periphery of the water outlet groove is provided with a saw-tooth water outlet weir.
In the above embodiment, the sludge-water separator 13 is disposed at the end of the settling zone 4 to separate the activated sludge from the water in the sewage, the water is discharged from the sewage treatment equipment through the water outlet tank 6, the activated sludge sinks, and the sludge-water separator 13 is in an inverted cone shape, so that the activated sludge is ensured to flow back completely and is not accumulated in the sludge-water separator 13. The amount, the entering angle and the speed of the mud-water mixture are controlled by the angles of the baffle and the side wall, so that sewage can be effectively separated in the mud-water separator 13, the inlet pollution caused by too low flow speed cannot occur, or the turbulent flow is generated at too high flow speed to influence the sludge precipitation.
In another embodiment of the invention, the fan 8 and the electric control cabinet 9 are arranged in the equipment room 12, so that the fan 8 and the electric control cabinet 9 are prevented from being exposed to the outside and suffering from loss caused by wind, wind and sunlight, and the service lives of the fan 8 and the electric control cabinet 9 are prolonged.
In another embodiment of the present invention, as shown in fig. 3, the VFL sewage treatment plant provided by the present invention is annularly arranged, the anaerobic zone 1 and the anoxic zone 2 are arranged at the outermost periphery, the aerobic zone 3 is arranged in the annular space formed by the anaerobic zone 1 and the anoxic zone 2, and the settling zone 4 is arranged at the center of the aerobic zone 3. The annular treatment device has a more stable structure and is more suitable for large-scale sewage treatment.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention. The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (17)
1. The VFL sewage treatment equipment is characterized by comprising an anaerobic zone, an anoxic zone, an aerobic zone, a settling zone and a control system for controlling sewage and activated sludge to flow in the anaerobic zone, the anoxic zone, the aerobic zone and the settling zone, wherein the anaerobic zone, the anoxic zone, the aerobic zone and the settling zone are sequentially connected.
2. The VFL sewage treatment plant of claim 1, wherein the control system comprises:
the aeration unit is arranged in the aerobic zone and is used for aeration of the aerobic zone;
a reflux unit for refluxing a sludge-water mixture among the anaerobic zone, the anoxic zone, the aerobic zone and the settling zone;
the online monitoring unit is arranged in the aerobic zone and used for monitoring the working data of the aerobic zone;
and the control unit is connected with the aeration unit, the backflow unit and the online monitoring unit and used for receiving the working data monitored by the online monitoring unit and generating a working command for controlling the aeration unit and the backflow unit.
3. A VFL sewage treatment plant according to claim 2, characterized in that the aeration unit comprises:
the aeration device is arranged in the aerobic zone and is used for aeration;
and the fan is connected with the aeration device and used for providing gas for the aeration device.
4. A VFL water treatment plant according to claim 3, characterized in that said aeration means comprises:
the aeration membrane is laid at the bottom of the aerobic zone and is used for aeration of the aerobic zone;
and the aeration pipe is connected with the aeration membrane and the fan and used for conveying the air quantity provided by the fan to the aeration membrane.
5. A VFL sewage treatment plant according to claim 2, characterized in that the reflux unit comprises one or more of the following reflux streams:
used for increasing the backflow of the sludge circulation at the water inlet end; the return flow of sludge circulation for completing the biological phosphorus removal of the system; the return flow of the sludge circulation for completing the biological denitrification of the system; a reflux for increasing the sludge concentration in the front section of the anoxic zone; the return flow for supplementing the sludge concentration of the anoxic zone is used for supplementing the return flow of the sludge concentration of the aerobic zone and is used for discharging excess sludge of the system.
6. A VFL sewage treatment plant according to claim 2, characterized in that the control system further comprises a valve stack box connected to the aeration unit, the recirculation unit and the control unit for executing the operating commands issued by the control unit.
7. A VFL sewage treatment plant according to claim 2, characterized in that the control unit controls the aeration intensity and aeration time of the aeration unit and the reflux intensity and reflux time of the reflux unit.
8. A VFL sewage treatment plant according to claim 7, wherein said control unit adjusts said aeration period and intensity, and said respective reflux periods and intensities, by means of said on-line measurement device measurement data.
9. A VFL sewage treatment plant according to any one of claims 1, wherein the shape of the treatment plant in which the anaerobic zone, the anoxic zone, the aerobic zone and the settling zone are combined comprises one selected from a circle, an ellipse, a square and a polygon.
10. A VFL sewage treatment plant according to claim 9, wherein when the tank type is circular, the anaerobic zone and the anoxic zone are disposed at the outermost periphery; the aerobic zone is of two semicircular structures and is arranged between the anaerobic zone and the anoxic zone; the settling zone is arranged between the two aerobic zones.
11. The VFL sewage treatment plant of claim 1, wherein a plurality of upper and lower baffles are provided in the anaerobic zone, said upper and lower baffles being alternately mounted in said anaerobic zone,
the lower end of the upper baffle plate is fixedly connected with the bottom of the anaerobic zone, so that an upper circulation channel of sewage is formed at the upper end of the upper baffle plate;
the lower end of the lower baffle plate is spaced from the bottom of the anaerobic zone, so that a lower circulation channel for sewage is formed at the lower end of the lower baffle plate.
12. The VFL sewage treatment plant of claim 1, wherein a plurality of upper baffles and lower baffles are provided in the anoxic zone, said upper baffles and said lower baffles being alternately installed in said anoxic zone,
the lower end of the upper baffle plate is fixedly connected with the bottom of the anoxic zone, so that an upper circulation channel of sewage is formed at the upper end of the upper baffle plate;
the lower end of the lower baffle plate is spaced from the bottom of the anoxic zone, so that a lower circulation channel for sewage is formed at the lower end of the lower baffle plate.
13. A VFL sewage treatment plant according to claim 12, wherein between the anoxic zone and the aerobic zone is an upper baffle, the sewage entering the aerobic zone from an upper flow path.
14. A VFL sewage treatment plant as claimed in claim 1, wherein the settling zone is terminated by a mud-water separator and a water outlet tank.
15. A VFL sewage treatment plant as claimed in claim 14 wherein the sludge-water separator is in the form of an inverted cone with the bottom facing upwards and the apex of the cone connected to the bottom of the settling zone, the side wall having a trapezoidal aperture, the aperture being externally fitted with a baffle which is angled to the side wall for the ingress of sludge from the aerobic zone.
16. The VFL sewage treatment plant of claim 15, wherein the sludge-water separator is made of PP plate or carbon steel plate.
17. A VFL sewage treatment plant as claimed in claim 15, wherein the effluent tank is located above the mud-water separator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011055581.0A CN112047585A (en) | 2020-09-29 | 2020-09-29 | VFL sewage treatment equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011055581.0A CN112047585A (en) | 2020-09-29 | 2020-09-29 | VFL sewage treatment equipment |
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| CN112047585A true CN112047585A (en) | 2020-12-08 |
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| CN202011055581.0A Pending CN112047585A (en) | 2020-09-29 | 2020-09-29 | VFL sewage treatment equipment |
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| CN113788583A (en) * | 2021-09-17 | 2021-12-14 | 中广核环保产业有限公司 | Wastewater treatment system |
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