CN110790374A - Inversion A2O + composite MBR sewage treatment device and treatment method thereof - Google Patents
Inversion A2O + composite MBR sewage treatment device and treatment method thereof Download PDFInfo
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- CN110790374A CN110790374A CN201910981312.8A CN201910981312A CN110790374A CN 110790374 A CN110790374 A CN 110790374A CN 201910981312 A CN201910981312 A CN 201910981312A CN 110790374 A CN110790374 A CN 110790374A
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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
- C02F3/302—Nitrification and denitrification treatment
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
Abstract
The invention discloses an inversion A2the/O + composite MBR sewage treatment device and the treatment method thereof comprise an ultrafine grating, an anoxic tank, an anaerobic tank, an aerobic tank and a composite MBR reactor which are sequentially arranged in the water flow direction; pretreated sewage passing through the superfine grating is pumped into an anoxic tank by a pump, one end of the anoxic tank is connected with subsequent treatment return sludge and a return nitrification liquid pipeline, the effluent of the anoxic tank directly enters an anaerobic tank and an aerobic tank, one end of the aerobic tank is provided with a nitrification liquid return pipeline and returns to the anoxic tank, and the effluent of the aerobic tank enters a composite MBR (membrane bioreactor); sewage treated by the three-dimensional elastic filler and the membrane component in the MBR tank can be discharged, one end of the MBR tank is provided with a sludge return pipeline which returns to the anoxic tank, and the MBR tank is also provided with a sludge discharge pipeline which discharges residual sludge. The invention can strengthen the effect of nitrogen and phosphorus removal, reduce the energy consumption of the process and obviously improve the water quality standard of the effluent.
Description
Technical Field
The invention relates to the technical field of urban sewage treatment, in particular to an inverted A2an/O + composite MBR sewage treatment device and a treatment method thereof.
Background
With the improvement of the discharge standard of urban sewage plants, the traditional sewage treatment process cannot meet the discharge requirement, and the standard improvement and the modification of the traditional sewage treatment process are urgently needed.
Conventional A2There are three distinct disadvantages to the/O process: 1) the anaerobic zone is in front of the sludge treatment device, and nitrate in the returned sludge has adverse effect on the anaerobic zone; 2) the anoxic zone is positioned in the middle of the system, and denitrification is in a disadvantage in carbon source distribution; 3) the internal circulation exists, and only a small part of residual sludge discharged by the system actually undergoes the complete phosphorus release and absorption processes. Thus proposing inversion A2the/O process is characterized in that anaerobic positions and anoxic positions are inverted, a denitrifying carbon source is preferentially satisfied, and the denitrification capability is enhanced, but the conventional inversion A2the/O process has the defect of improper water inlet distribution, and the same reflux system is adopted, so that the stability of the effluent of suspended matters is insufficient, and the denitrification efficiency is low.
MBR sewage treatment is a common mode of modern sewage treatment, MBR sewage treatment is a novel sewage treatment technology combining an activated sludge process and an integrated submerged membrane separation system, and the flow of a typical MBR system can be described as follows: sewage flows into the regulating tank through the grating, the sewage in the regulating tank is conveyed to the anoxic zone by the pump, suspended pollutants such as starch, fiber, carbohydrate, soluble organic compounds and the like are decomposed into organic acid, macromolecular organic matters are decomposed into micromolecular organic matters, and insoluble organic matters are converted into soluble organic matters. Then the sewage enters an aerobic zone to carry out organic matter biodegradation, simultaneously carries out biological nitration reaction, and carries out denitrification by flowing back to an anoxic zone to complete the denitrification function. Impurities which can not be degraded and activated sludge are left in the membrane pool after being separated by the membrane component, and water produced by membrane filtration is recycled or discharged after reaching the standard. MBR sewage treatment generally sets up after biochemical treatment, replaces traditional secondary sedimentation tank, can carry out high-efficient solid-liquid separation, has out water quality of water stable, and surplus sludge output is few advantage, but also has the investment higher simultaneously, the energy consumption is high, operating cost height is high and so on not enough, needs to improve urgently.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an inversion A2The sewage treatment device of the/O + compound MBR effectively solves the problem of inversion A2The low efficiency of the denitrification of the/O and the reduction of the energy consumption and the running cost in the MBR process.
In order to achieve the purpose, the invention adopts the following technical scheme:
inversion A2the/O + composite MBR sewage treatment device comprises a superfine grating, an anoxic tank, an anaerobic tank, an aerobic tank and a composite MBR reactor which are sequentially arranged in the water inlet direction;
the aerobic tank is provided with a nitrifying liquid return pipeline and is connected to the anoxic tank through the nitrifying liquid return pipeline; the composite MBR is provided with a sludge return pipeline and is connected to the anoxic tank through the sludge return pipeline; a reflux pump is arranged on the pipeline after the nitration liquid reflux pipeline and the sludge reflux pipeline are converged and is used for pumping nitration liquid and sludge;
the superfine grating is connected to the anoxic tank and the anaerobic tank through water inlet pipes, multipoint water inlet pipes are arranged on the water inlet pipes, and sewage is respectively connected to the anoxic tank and the anaerobic tank through the multipoint water inlet pipes; the pipeline of the multipoint water inlet pipe connected to the anoxic pond is provided with an anoxic pond water inlet valve for controlling the water inlet of the anoxic pond; the pipeline of the multi-point water inlet pipe connected to the anaerobic tank is provided with an anaerobic tank water inlet valve for controlling the water inlet of the anaerobic tank;
the composite MBR tank comprises a filler cube, an MBR membrane module and an aeration system, wherein the filler cube and the MBR membrane module are sequentially arranged in the water flow direction, and the aeration system is positioned below the filler cube and the MBR membrane module; the filler cube comprises a three-dimensional filler and a cube framework, the three-dimensional filler is fixedly arranged in the cube framework, the aeration system comprises an aeration pipe, and a grid support is arranged above the aeration pipe; the cubic framework is movably connected with the grid support through a connecting buckle; the MBR membrane component is also movably connected with the grid bracket through a connecting buckle;
the three-dimensional filler is formed by pressing and buckling soft hydroformylation fibers on a plastic wafer, the unit diameter of the three-dimensional filler is 150-200 mm, and the space between the three-dimensional fillers is 80-100 mm.
The filler cube provided by the invention adopts a semi-fixed connection mode, is convenient to install and disassemble, can greatly shorten the replacement time of fillers, is also the same as an MBR (membrane bioreactor) membrane module, shares a support with an aeration system, does not need repeated installation, and is simple in structure and convenient to use. In addition, the arrangement of the three-dimensional filler can ensure that the three-dimensional filler is uniformly contacted with sewage, and the contact area is larger. Thus, the filler cube is arranged at the front part of the MBR tank, sewage firstly passes through the filler cube and an aeration system at the lower part of the filler, a biological membrane is formed on the surface of the sewage and is used as a membrane module for pretreatment, and then the sewage enters a membrane module system, so that the pressure of the membrane module is reduced, the return flow of activated sludge is reduced, and the energy consumption of the MBR tank can be greatly reduced; and the sludge reflux and the nitrifying liquid reflux share one set of pump system, so that the energy consumption is further reduced.
Preferably, the connecting buckle is a pulley and a buckle.
Preferably, the distance between the bars of the superfine grids is 0.2-2 mm, and the interval between the superfine grids is 0.1 mm.
Preferably, the MBR membrane module is a hollow fiber membrane module or a flat plate membrane module.
Preferably, the MBR membrane module mainly comprises membranes, and the effective distance between the membranes is more than 100 mm.
Preferably, the diameter of the aeration pipe is 15-20mm, the openings are on the same axis, the openings are 2-4mm, and the perforation interval is 100-150 mm.
Preferably, the designed membrane flux of the composite MBR tank is increased by 30-50% on the basis of factory design allowance.
The invention also provides an inversion A2Sewage treatment of/O + composite MBRThe treatment method has low operation cost and good treatment effect.
Said inversion A2the/O + composite MBR sewage treatment method comprises the following steps:
the method comprises the following steps: the pretreated sewage passes through a superfine grid to intercept tiny impurities such as suspended matters, fibers and the like in the sewage;
step two: then sewage flows through an anoxic tank, an anaerobic tank and an aerobic tank in sequence to carry out nitrogen and phosphorus removal; when C of the anaerobic pond: n: and (3) when the P does not satisfy 100:5:1, opening a water inlet valve of the anaerobic tank to enable the sewage treated in the step one to flow into the anaerobic tank, and supplementing a carbon source until the ratio of C: n: p is 100:5:1, and a water inlet valve of the anaerobic tank is closed;
step three: pumping the sewage after denitrification and dephosphorization treatment into a composite MBR; a reflux pump pumps the nitrified mixed liquid in the aerobic tank, and the nitrified mixed liquid flows back to the anoxic tank through a nitrified liquid reflux pipeline;
step four: the sewage entering the composite MBR is subjected to cubic contact oxidation of the filler, enhanced oxidation of an aeration system and filtration of an MBR membrane module, and the effluent is discharged; the reflux pump pumps the sludge in the composite MBR, and the sludge is refluxed to the anoxic tank through the sludge reflux pipeline.
The anoxic pond receives raw sewage, composite MBR (membrane bioreactor) return sludge and aerobic pond return nitrification liquid, and the denitrifying bacteria in the anoxic pond utilize organic matters in the sewage as carbon sources and NO3 --N and NO2 -Reduction of-N to N2Release to the air; the anaerobic tank receives sludge and sewage which are from the anoxic tank and are rich in phosphorus accumulating bacteria through denitrification, a multi-point water inlet mode is adopted, raw sewage is fed according to the water quality condition to supplement a carbon source, the anaerobic tank mainly performs a phosphorus release process, the composite MBR receives the effluent of the aerobic tank, the sewage is subjected to contact oxidation by the filler cube, then the effluent is fed to the membrane module system, and the effluent is filtered by the membrane module system.
Preferably, the nitrified mixed liquid flows back to the anoxic tank by 80-120 percent, and the sludge flows back to the anoxic tank by 150-180 percent.
Preferably, the hydraulic retention time of the anoxic tank is 0.5-2.5 h, the hydraulic retention time of the anaerobic tank is 1-2 h, the hydraulic retention time of the aerobic tank is 2.5-4 h, and the hydraulic retention time of the composite MBR tank is 0.5-1.5 h.
Preferably, in the fourth step, the steam-water ratio is 24:1, and the dissolved oxygen is controlled to be 3-5 mg/L; the aeration blower adopts a frequency conversion speed regulation technology. The steam-water ratio and the dissolved oxygen amount are controlled within a certain range, so that the effect of the operation cost can be balanced, and the energy waste is avoided.
Preferably, the wrappage of the MBR membrane module is sprayed by a high-pressure water gun or tap water, and the treatment capacity of a single membrane is less than 1.5m3/hr。
The invention is realized by inverting the existing A2the/O process is technically improved, and the water inlet mode and the updated parameters are changed to overcome A2The problem of low denitrification efficiency of the/O: the denitrification efficiency is reduced by adopting a two-point water inlet mode to avoid inversion. The proportion of sewage entering the anoxic tank and the aerobic tank is controlled according to the quality condition of the sewage, the carbon source is ensured to meet the requirements of nitrification and denitrification without overflowing, activated sludge in the process undergoes all processes of phosphorus release and phosphorus absorption, the group effect is realized in the aspect of phosphorus removal, the phosphorus removal effect is obviously improved, the anoxic zone is positioned at the head end of the process, the denitrification is allowed to preferentially obtain the carbon source, and the denitrification capability of the system is further enhanced.
The invention adopts a composite MBR process, combines biological contact oxidation with a membrane component, innovatively introduces a detachable filler cube to be arranged in front of the membrane component, and combines the detachable filler cube with an aeration system, thereby reducing the pressure of the membrane component, improving the performance and cleaning and replacing frequency of the membrane component, simultaneously reducing the reflux quantity of activated sludge and greatly reducing the energy consumption. The sludge reflux system and the aerobic nitrification liquid reflux are combined and share one set of reflux pump system, so that the construction cost is reduced, and the operation energy consumption is further reduced. In addition, the comprehensive sewage treatment capacity of the invention is optimized by the design of the membrane, the adjustment of the aeration environment and the like, thereby saving energy, saving cost and simultaneously improving economic benefit.
Drawings
FIG. 1 is a process flow diagram of the present invention.
FIG. 2 is a schematic structural diagram of the apparatus of the present invention.
Fig. 3 is a schematic view of a packing cube and aeration system layout.
Wherein the numbers represent the following meanings: 1. a superfine grid; 2. an anoxic tank; 3. an anaerobic tank; 4. an aerobic tank; 5. a composite MBR tank; 11. a water inlet pipe; 12. a sewage pump for water inlet pipe; 13. a multi-point water inlet pipe; 21. a water inlet valve of the anoxic tank; 22. a return sludge valve; 23. a nitrifying liquid reflux valve; 24. a reflux pump; 31. a water inlet valve of the anaerobic tank; 41. a sewage pump of the aerobic tank; 42. a water outlet pipe of the aerobic tank; 43. a nitrifying liquid reflux pipeline; 51. a filler cube; 52. an MBR membrane module; 53. an aeration system; 54. a sludge return line; 55. a sludge discharge pipe; 56. a self-priming pump; 511. three-dimensional packing; 512. a cubic skeleton; 513. a connecting buckle; 514. a grid support; 531. an aeration pipe.
Detailed Description
In order to make the purpose and technical solution of the embodiments of the present invention clearer, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Example 1
As shown in fig. 1, an inversion a2the/O + composite MBR device comprises a superfine grating 1, an anoxic tank 2, an anaerobic tank 3, an aerobic tank 4 and a composite MBR tank 5 which are sequentially arranged in the water flow direction.
As shown in figure 2, the ultrafine grids 1 are arranged in parallel, the interval between the two grids is 0.1mm, the ultrafine grids 1 are composed of grid bars, and the distance between the grid bars is 0.2-2 mm, and the ultrafine grids are used for filtering finer particles in the pretreated water.
The superfine grating 1 is connected to the anoxic tank 2 and the anaerobic tank 3 through a water inlet pipe 11, a multi-point water inlet pipe 13 is arranged on the water inlet pipe 11, and sewage is respectively connected to the anoxic tank 2 and the anaerobic tank 3 through the multi-point water inlet pipe 13; the pipeline of the multipoint water inlet pipe 13 connected to the anoxic pond 2 is provided with an anoxic pond water inlet valve 21 for controlling the water inlet of the anoxic pond 2; the pipeline of the multi-point water inlet pipe 13 connected to the anaerobic tank 3 is provided with an anaerobic tank water inlet valve 31 for controlling the water inlet of the anaerobic tank 3; the multi-point water feeding mode can supplement carbon source required by the anaerobic tank 3.
The anoxic tank 2, the anaerobic tank 3 and the aerobic tank 4 are arranged in sequence according to the water inlet direction. Compared with the traditional AAO, the anoxic tank 2 is arranged in front of the anaerobic tank 3, the carbon source for denitrification is preferentially met, and the denitrification capability is enhanced; the phosphorus-accumulating bacteria directly enter the aerobic tank 4 after releasing phosphorus in the anaerobic tank 3, and the phosphorus-absorbing power formed under the anaerobic condition can be more fully utilized.
The aerobic tank 4 is connected to the combined MBR tank 5 through an aerobic tank water outlet pipe 42, and an aerobic tank sewage pump 41 is arranged on the aerobic tank water outlet pipe 42 and pumps sewage to the combined MBR tank 5; one end of the aerobic tank 4 is also connected to the anoxic tank 2 through a nitrifying liquid return pipeline 43, and a nitrifying liquid return valve 23 is arranged on the aerobic tank. One end of the combined MBR tank 5 is provided with a sludge return pipe 54 which is connected with the anoxic tank 2 through a sludge return valve 22, so that the sludge flows back to the anoxic tank 2. The return pump 24 is arranged on the pipeline after the nitration liquid return pipeline 43 and the sludge return pipeline 54 are converged and is used for pumping nitration liquid and sludge.
Still have mud discharge pipe 55 and self priming pump 56 on the combined type MBR pond 5, mud discharge pipe 55 is used for discharging surplus mud, and self priming pump 56 is used for the suction water purification.
The composite MBR tank 5 comprises a filler cube 51, an MBR membrane module 52 and an aeration system 53, wherein the filler cube 51 and the MBR membrane module 52 are sequentially arranged in the water flow direction.
As shown in fig. 3, the aeration system 53 includes an aeration pipe 531, and a grill support 514 is installed above the aeration pipe 531. The filler cube 51 is movably connected with the grid bracket 514 through a connecting buckle 513; the MBR membrane module 52 is also movably connected with the grid bracket 514 through a connecting buckle 513; an aeration system 53 is installed below the packing cube 51 and the MBR membrane modules 52. The connecting link 513 of this embodiment is a pulley and a buckle, but the connecting link of the present invention is not limited thereto.
The filler cube 51 comprises a cubic filler 511 and a cube framework 512, wherein the cubic filler 511 is fixedly arranged inside the cube framework 512. The three-dimensional filler 511 is formed by pressing and buckling soft hydroformylation fibers on a plastic wafer, the unit diameter of the three-dimensional filler 511 is 150-200 mm, and the space between the three-dimensional fillers 511 is 80-100 mm. In the embodiment, the biological membrane generated by the contact of the three-dimensional elastic filler and the sewage is used for further enhancing the denitrification and dephosphorization effect in an aerobic environment, and simultaneously, the pressure load of the rear MBR membrane component is reduced, the cleaning frequency of the MBR membrane component is reduced, and the service cycle is prolonged.
The MBR membrane module 52 is composed of a plurality of membranes, and the clearance between each membrane and the filler cube 51 corresponds to one path of aeration pipe 531. The MBR membrane module 52 can select a hollow fiber membrane module or a flat plate membrane module according to the actual sewage condition. The effective distance between the membranes in the membrane module 52 system is more than 100mm, the accumulation of membrane module wrappings to a certain degree needs to be sprayed and washed by a high-pressure water gun or tap water, and the treatment capacity of a single membrane module is less than 1.5m3/hr。
The same set of reflux pump system is adopted for the reflux of the nitrifying liquid in the aerobic tank 4 and the reflux and discharge of the sludge in the combined MBR tank 5, and the reflux pump 24 is adopted, so that the purpose of energy conservation is achieved.
Above inversion A2the/O + composite MBR sewage treatment method comprises the following steps:
after the sewage is pretreated, impurities such as tiny suspended matters, fibers and the like in the sewage are intercepted through the superfine grating 1.
Sewage is pumped into an anoxic tank 2 through a water inlet pipe 11 by a water inlet pipe sewage pump 12, and denitrifying bacteria in the anoxic tank utilize organic matters in the sewage as carbon sources to remove NO3 --N and NO2 -Reduction of-N to N2To be released to the air.
The effluent of the anoxic tank 2 enters an anaerobic tank 3, the anaerobic tank 3 receives sludge and sewage which are from the anoxic tank and are rich in phosphorus accumulating bacteria through denitrification, and a multipoint water inlet mode is adopted simultaneously, when C: n: when the P is less than 100:5:1, supplementing a carbon source and feeding raw sewage according to the water quality condition to supplement the carbon source, wherein the anaerobic tank mainly performs a phosphorus release process.
The aerobic tank receives the effluent of the anaerobic tank, the organic nitrogen in the aerobic tank is ammoniated and then nitrified, the concentration of phosphorus is reduced along with the intake of phosphorus accumulating bacteria, and meanwhile, the nitrified mixed liquor in the aerobic tank flows back to the anoxic tank in proportion. The aerobic tank 4 makes the nitrifying liquid flow back to the anoxic tank 2 through the nitrifying liquid return pipeline 43 to supplement nitrate nitrogen.
After nitrogen and phosphorus removal in the anoxic tank 2, the anaerobic tank 3 and the aerobic tank 4, sewage enters the composite MBR tank 5 through the water outlet pipe 42 of the aerobic tank, is subjected to contact oxidation and adsorption by the filler cube 51, is filtered by the MBR membrane component 52 to reach the discharge standard, and is discharged by the self-priming pump 56. The reflux pump 24 pumps the sludge in the composite MBR 5, and the sludge is refluxed to the anoxic tank 2 through a sludge reflux pipeline 43; the excess sludge is discharged through a sludge discharge pipe 55.
The sludge in the composite MBR tank 5 flows back to the anoxic tank 2 according to the proportion, and the residual sludge is discharged through a sludge discharge pipeline 55.
The reflux ratio of the nitrifying liquid from the aerobic tank 4 to the anoxic tank 2 is 80-120 percent; the reflux ratio of the activated sludge refluxed to the anoxic tank from the composite MBR tank 5 is 150-180%.
The hydraulic retention time of the anoxic tank is 0.5-2.5 h, the hydraulic retention time of the anaerobic tank is 1-2 h, the hydraulic retention time of the aerobic tank is 2.5-4 h, and the hydraulic retention time of the composite MBR tank is 0.5-1.5 h.
The membrane flux designed in the combined MBR tank 5 is increased by 30-50% on the basis of factory design allowance; the diameter of an aeration perforated pipe of the composite MBR tank 5 is 15-20mm, the perforated holes are required to be on the same axis, the perforated holes are 2-4mm, the perforated hole spacing is 100-150mm, the aeration rate is estimated according to empirical values, the steam-water ratio is 24:1, and the dissolved oxygen is controlled at 3-5 mg/L; the aeration blower adopts a frequency conversion speed regulation technology.
Example 2
Pretreated domestic sewage using the apparatus and method of example 1Treating water, wherein the specific process conditions are as follows: the hydraulic retention time is 7.5h, the hydraulic retention time of the MBR tank is 1.5h, and the reflux ratio of the nitrifying liquid is 120 percent; the reflux ratio of the activated sludge is 180 percent; the diameter of the three-dimensional elastic filler unit of the composite MBR tank is 200mm, and the filler spacing is 80 mm; selecting a flat membrane, wherein the design allowance of membrane flux is increased by 30%; the effective distance between the membranes is more than 120mm, tap water is adopted for spray washing, and the treatment capacity of a single membrane component is less than 1.2m3(ii)/hr; selecting an aeration perforated pipe with the diameter of 20mm, wherein the diameter of the perforated pipe is 2mm, the perforation distance is 100mm, the steam-water ratio is 24:1, and the dissolved oxygen is controlled to be 3-5 mg/L.
The scale of the sewage plant is 2 ten thousand tons/day, the average COD of the inlet water is 352.5mg/L, BOD5124.7mg/L, ammonia nitrogen 25.6mg/L, total nitrogen 32.2mg/L and total phosphorus 4.1 mg/L.
The effluent quality is COD 20.5mg/L and BOD53.2mg/L, 1.6mg/L of ammonia nitrogen, 2.0mg/L of total nitrogen and 0.18mg/L of total phosphorus, and the effluent quality reaches the quasi IV-class water standard.
Example 3
The quality of inlet water of a certain sewage plant is as follows: average COD 422.4mg/L, BOD5141.9mg/L, 28.3mg/L ammonia nitrogen, 36.2mg/L total nitrogen and 5.6mg/L total phosphorus.
The original sewage treatment process of the sewage plant is A2the/O + MBR process has the treatment scale of 1 ten thousand tons/day, the hydraulic retention time of 9 hours, the hydraulic retention time of an MBR tank of 2 hours, the reflux ratio of nitrifying liquid of 200 percent and the reflux ratio of activated sludge of 200 percent, selects a hollow fiber membrane, and has the treatment capacity of a single membrane component lower than 1.0m3The steam-water ratio is 24:1, wherein the diameter of each aeration perforated pipe is 18mm, the opening is 1.8mm, the perforation interval is 150 mm. After the treatment of the original sewage treatment process of the sewage plant, the effluent quality is COD 50.5mg/L and BOD510.4mg/L, 4.8mg/L ammonia nitrogen, 13.5mg/L total nitrogen and 0.48mg/L total phosphorus, and meets the first-level a emission standard.
According to the structure of embodiment 1, reform the original sewage treatment process of sewage plant: the biochemical pool changes the water inlet and outlet sequence of the pipeline to form an inversion A2the/O process does not need to build a new water tank, the original aeration mode of the MBR tank is not changed, the parameters of the membrane module are optimized, and the front part of the membrane module is provided with the filler cube of the invention. The hydraulic retention time is 8h after modification, the hydraulic retention time of the MBR tank is 1.5h, and nitrification is carried outThe liquid reflux ratio is 100 percent; the reflux ratio of the activated sludge is 150 percent; the diameter of the three-dimensional elastic filler unit of the composite MBR tank is 200mm, and the filler spacing is 100 mm; the original membrane component and the aeration system are reserved, the membrane component parameters are optimized, and the membrane flux design allowance is increased by 35%; the single membrane module treatment capacity is less than 1.2m3And/hr. The original sewage treatment process of the sewage plant is improved into the structure of the invention, and after the sewage is treated, the effluent quality is COD 32.3mg/L and BOD58.9mg/L, 1.9mg/L ammonia nitrogen, 2.3mg/L total nitrogen and 0.36mg/L total phosphorus, which can reach the standard of V-class water on the earth surface.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention should be determined by the appended claims.
Claims (10)
1. Inversion A2the/O + composite MBR sewage treatment device is characterized by comprising an ultrafine grating (1), an anoxic tank (2), an anaerobic tank (3), an aerobic tank (4) and a composite MBR reactor (5) which are sequentially arranged in the water inlet direction;
the aerobic tank (4) is provided with a nitrifying liquid return pipeline (43), and the aerobic tank (4) is connected to the anoxic tank (2) through the nitrifying liquid return pipeline (43); the composite MBR (5) is provided with a sludge return pipeline (54), and the composite MBR (5) is connected to the anoxic tank (2) through the sludge return pipeline (54); a return pump (24) is arranged on the pipeline after the nitrification liquid return pipeline (43) and the sludge return pipeline (54) are converged and is used for pumping nitrification liquid and sludge;
the superfine grating (1) is connected to the anoxic tank (2) and the anaerobic tank (3) through a water inlet pipe (11), a multi-point water inlet pipe (13) is arranged on the water inlet pipe (11), and sewage is respectively connected to the anoxic tank (2) and the anaerobic tank (3) through the multi-point water inlet pipe (13); a pipeline of the multi-point water inlet pipe (13) connected to the anoxic pond (2) is provided with an anoxic pond water inlet valve (21) for controlling the water inlet of the anoxic pond (2); a pipeline of the multi-point water inlet pipe (13) connected to the anaerobic tank (3) is provided with an anaerobic tank water inlet valve (31) for controlling the water inlet of the anaerobic tank (3);
the composite MBR tank (5) comprises a filler cube (51), an MBR membrane module (52) and an aeration system (53), wherein the filler cube (51) and the MBR membrane module (52) are sequentially arranged in the water flow direction, and the aeration system (53) is positioned below the filler cube (51) and the MBR membrane module (52); the filler cube (51) comprises a three-dimensional filler (511) and a cube framework (512), the three-dimensional filler (511) is fixedly arranged in the cube framework (512), the aeration system (53) comprises an aeration pipe (531), and a grid support (514) is arranged above the aeration pipe (531); the cubic framework (512) is movably connected with the grid bracket (514) through a connecting buckle (513); the MBR membrane component (52) is also movably connected with the grid bracket (514) through a connecting buckle (513);
the three-dimensional filler (511) is formed by pressing and buckling soft hydroformylation fibers on a plastic wafer, the unit diameter of the three-dimensional filler (511) is 150-200 mm, and the space between the three-dimensional filler (511) is 80-100 mm.
2. Inversion A according to claim 12the/O + combined MBR sewage treatment device is characterized in that: the connecting buckle (513) is a pulley and a buckle.
3. Inversion A according to claim 12the/O + combined MBR sewage treatment device is characterized in that: the distance between the bars of the superfine grids (1) is 0.2-2 mm, and the interval between the superfine grids (1) is 0.1 mm.
4. Inversion A according to claim 12the/O + combined MBR sewage treatment device is characterized in that: the MBR membrane module (52) mainly comprises membranes, and the effective distance between the membranes is more than 100 mm.
5. Inversion A according to claim 1 or 42the/O + combined MBR sewage treatment device is characterized in that: the membrane flux designed in the composite MBR tank (5) is increased by 30-50% on the basis of factory design allowance.
6. An inversion a according to claim 12O + combined MBR sewage treatment deviceThe sewage treatment method is characterized by comprising the following steps:
the method comprises the following steps: the pretreated sewage passes through the superfine grating (1) to intercept tiny impurities such as suspended matters, fibers and the like in the sewage;
step two: then sewage flows through an anoxic tank (2), an anaerobic tank (3) and an aerobic tank (4) in sequence to carry out denitrification and dephosphorization; when C of the anaerobic tank (3): n: when the P does not satisfy 100:5:1, opening an anaerobic tank water inlet valve (31) to enable the sewage treated in the first step to flow into an anaerobic tank (3), and supplementing a carbon source until the C: n: p is 100:5:1, and a water inlet valve (31) of the anaerobic tank is closed;
step three: pumping the sewage after denitrification and dephosphorization treatment into a composite MBR (5); the reflux pump (24) pumps the nitrified mixed liquor in the aerobic tank (4), and the nitrified mixed liquor is refluxed to the anoxic tank (2) through a nitrified liquor reflux pipeline (43);
step four: sewage entering the composite MBR (5) is subjected to contact oxidation by a filler cube (51), enhanced oxidation by an aeration system (53) and filtration by an MBR membrane module (52), and water is discharged; the reflux pump (24) sucks the sludge in the composite MBR (5) and makes the sludge reflux to the anoxic tank (2) through a sludge reflux pipeline (43).
7. An inversion A according to claim 62the/O + composite MBR sewage treatment method is characterized in that the nitrified mixed liquid flows back to the anoxic tank (2) by 80-120 percent, and the sludge flows back to the anoxic tank (2) by 150-180 percent.
8. An inversion A according to claim 62the/O + composite MBR sewage treatment method is characterized in that the hydraulic retention time of an anoxic tank (2) is 0.5-2.5 h, the hydraulic retention time of an anaerobic tank (3) is 1-2 h, the hydraulic retention time of an aerobic tank (4) is 2.5-4 h, and the hydraulic retention time of a composite MBR tank (5) is 0.5-1.5 h.
9. An inversion A according to claim 62the/O + composite MBR sewage treatment method is characterized in that in the fourth step, the steam-water ratio is 24:1, and the dissolved oxygen is controlled to be 3-5 mg/L; aeration blowerAnd a variable frequency speed regulation technology is adopted.
10. An inversion A according to claim 62the/O + composite MBR sewage treatment method is characterized in that the wrappage of an MBR membrane component (52) is sprayed by a high-pressure water gun or tap water, and the treatment capacity of a single membrane is less than 1.5m3/hr。
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111517560A (en) * | 2020-03-23 | 2020-08-11 | 北京德源通环保科技有限公司 | Emergency sewage treatment system |
| WO2023124203A1 (en) * | 2021-12-30 | 2023-07-06 | 哈尔滨工业大学 | Inverted a2/o-gdmbr integrated village and town sewage treatment apparatus with external electric field, and sewage treatment method thereof |
| GB2619123A (en) * | 2022-09-07 | 2023-11-29 | Harbin Inst Technology | Integrated inverted A2/O-GDMBR based on external electric field for village sewage treatment device and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1785829A (en) * | 2005-11-15 | 2006-06-14 | 中国科学院生态环境研究中心 | Composite membrane bioreactor |
| CN201770575U (en) * | 2010-06-23 | 2011-03-23 | 大连交通大学 | Combined membrane bioreactor |
| CN107176679A (en) * | 2017-06-25 | 2017-09-19 | 云南傲远环保科技有限公司 | The aerobic membrane module processing method of anaerobic/anoxic |
-
2019
- 2019-10-16 CN CN201910981312.8A patent/CN110790374A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1785829A (en) * | 2005-11-15 | 2006-06-14 | 中国科学院生态环境研究中心 | Composite membrane bioreactor |
| CN201770575U (en) * | 2010-06-23 | 2011-03-23 | 大连交通大学 | Combined membrane bioreactor |
| CN107176679A (en) * | 2017-06-25 | 2017-09-19 | 云南傲远环保科技有限公司 | The aerobic membrane module processing method of anaerobic/anoxic |
Non-Patent Citations (3)
| Title |
|---|
| 寇杰等主编: "《油田水处理》", 30 November 2018, 中国石油大学出版社 * |
| 林海龙主编: "《基础环境工程学》", 31 August 2013, 哈尔滨工业大学出版社 * |
| 谢冰等编著: "《废水生物处理原理和方法》", 30 April 2007, 中国轻工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111517560A (en) * | 2020-03-23 | 2020-08-11 | 北京德源通环保科技有限公司 | Emergency sewage treatment system |
| WO2023124203A1 (en) * | 2021-12-30 | 2023-07-06 | 哈尔滨工业大学 | Inverted a2/o-gdmbr integrated village and town sewage treatment apparatus with external electric field, and sewage treatment method thereof |
| GB2619123A (en) * | 2022-09-07 | 2023-11-29 | Harbin Inst Technology | Integrated inverted A2/O-GDMBR based on external electric field for village sewage treatment device and method |
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