CN104445830A - A3O-MBBR integrated sewage treatment device and sewage treatment method - Google Patents
A3O-MBBR integrated sewage treatment device and sewage treatment method Download PDFInfo
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- CN104445830A CN104445830A CN201410777913.4A CN201410777913A CN104445830A CN 104445830 A CN104445830 A CN 104445830A CN 201410777913 A CN201410777913 A CN 201410777913A CN 104445830 A CN104445830 A CN 104445830A
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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
- C02F3/02—Aerobic processes
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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
- C02F3/28—Anaerobic digestion processes
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Abstract
The invention relates to the technical field of sewage treatment, in particular to a sewage treatment agent A3an/O-MBBR integrated sewage treatment device and a sewage treatment method. The integrated sewage treatment device has the advantages that the sludge backflow mechanism, the nitrification liquid backflow mechanism and the anaerobic liquid backflow mechanism are arranged, and the suspended filler is filled in the aerobic tank, so that the integrated sewage treatment device has good treatment effect on nitrogen and phosphorus in sewage, high treatment efficiency, compact structure and small occupied area. In addition, the invention improves the sedimentation effect of the sedimentation tank by optimizing the structure of the sedimentation tank in the integrated sewage treatment device, and can obviously reduce the floating phenomenon of sludge and the content of suspended matters in the effluent. After the sewage is treated by the integrated sewage treatment equipment, the effluent can reach the first class A standard of pollutant discharge Standard of urban sewage treatment plant (GB 18918-2002).
Description
Technical field
The present invention relates to technical field of sewage, particularly relate to a kind of A
3/ O-MBBR integrated sewage treating apparatus and sewage water treatment method.
Background technology
Along with the development of China's economic society, water resources crisis and water environment pollution increasingly sharpen, and the quantity discharged of all kinds of sewage/waste water significantly increases, serious threat water body environment, have become one of focus of domestic and international field of Environment Protection concern.Since " 12 ", the multinomial environmental protection and treatment relevant policies of national intensive appearance, its center of gravity progressively turns to villages and small towns comprehensive environmental improvement to shift by industry, municipal pollution treatment, and villages and small towns sewage disposal has become the environmental issue needing solution badly.In conjunction with China's domestic sewage in rural areas production distribution dispersion, with a varied topography, pipe network covering imperfection, the features such as the water yield is unstable, thus be not suitable for adopting the centralized processing of traditional wastewater treatment plant, and there is flexible, easy and efficient integrated sewage treating apparatus arise at the historic moment.The Technology development that existing integrated sewage treating apparatus adopts oneself be tending towards ripe, control villages and small towns water environment pollution is played a positive role, but still lower to the nutrient removal such as nitrogen, phosphorus rate, make the water body such as lake, reservoir increasingly worsen, body eutrophication problem is still quite outstanding.In addition, also there is the deficiency that floor space is large and energy consumption is high in existing integrated sewage treating apparatus.
Moving bed biological film sewage treatment device (Moving Bed Biofilm Reactor, be called for short MBBR) be suspending carrier by adding some amount in waste disposal plant, improve the biomass in waste disposal plant and biological species, thus improve the processing efficiency of waste disposal plant.Although MBBR has the features such as volumetric loading is high, shock-resistance is strong, this technique is not high to the clearance of total nitrogen, total phosphorus, fundamentally can not solve water pollutions " eutrophication " problem, can only delay water pollution trend.In order to prevent the aggravation of body eutrophication, water outlet total nitrogen and total phosphorus concentration need maintain in lower scope, thus in the urgent need to a kind for the treatment of technology and equipment of easy to operate, effective, low cost.
Summary of the invention
The present invention is directed to existing integrated sewage treating apparatus floor space large, the high and problem to nitrogen, phosphorus poor processing effect of energy consumption, provides a kind of floor space little, good to nitrogen, phosphorus treatment effect, the A that processing efficiency is high
3/ O-MBBR integrated sewage treating apparatus, and corresponding sewage water treatment method.
For achieving the above object, the present invention is by the following technical solutions:
A kind of A
3/ O-MBBR integrated sewage treating apparatus, comprise be communicated with successively pre-denitration pond, anaerobic pond, anoxic pond, Aerobic Pond, settling tank and clean water basin; Floating stuffing is filled with in described Aerobic Pond; Sludge reflux mechanism is provided with between described settling tank and anaerobic pond; Be provided with nitrification liquid between described Aerobic Pond and anoxic pond to reflux mechanism; Be provided with anaerobism liquid between described anaerobic pond and pre-denitration pond to reflux mechanism.
Preferably, described anoxic pond comprises the first anoxic pond and the second anoxic pond, and described nitrification liquid backflow mechanism is located between Aerobic Pond and the second anoxic pond.
Preferably, be provided with anoxic liquid between described first anoxic pond and anaerobic pond to reflux mechanism.
Described settling tank comprises settling tank pond body, and the first side wall of described settling tank pond body is provided with water-in, and the second sidewall of settling tank pond body is provided with water outlet, is also provided with the first baffle plate and second baffle in the body of described settling tank pond; The top of described first baffle plate and second baffle is higher than the most high liquid level (HLL) position of settling tank pond body, and the bottom of the first baffle plate is lower than the bottom of second baffle; Region between described first baffle plate and the first pool wall is in opposite directions inhalant region, region between described second baffle and the second pool wall is in opposite directions exhalant region, region between first baffle plate and second baffle is settling region, and inhalant region, settling region, exhalant region are interconnected in the below of the first baffle plate and second baffle.
The bottom of described second baffle is positioned at the below of water outlet, and the distance of the most high liquid level (HLL) position of the bottom of second baffle and settling tank pond body is 15-30cm.
The bottom of described settling tank pond body is provided with taper sludge bucket.Preferably, the bottom of described settling tank pond body is provided with two taper sludge buckets.
Be provided with a water distributor in described inhalant region, the tube wall of described water distributor is provided with posticum; Arrange a water inlet pipe through water-in, one end of described water inlet pipe is communicated with water distributor.
Described water outlet is provided with an effluent weir.
The volume of described inhalant region is the 5-10% of settling tank pond body cubic capacity.
The volume of described exhalant region is the 1-3% of settling tank pond body cubic capacity.
The mud import of described sludge reflux mechanism is connected with the bottom of taper sludge bucket.
In described Aerobic Pond, the packing ratio of floating stuffing is 0.25-0.5.
Described floating stuffing is polyethylene carrier or sponge filler or modification biological filler.
The above-mentioned A of a kind of application
3the method that/O-MBBR integrated sewage treating apparatus is disposed of sewage, makes sewage flow through pre-denitration pond, anaerobic pond, anoxic pond, Aerobic Pond and settling tank successively and processes; Part of contaminated water in described anaerobic pond is back in pre-denitration pond; Part of contaminated water in described Aerobic Pond is back in anoxic pond; The partial sludge be precipitated out in described settling tank is back in anaerobic pond, and the sewage through settling tank precipitation then enters in clean water basin; Floating stuffing is filled with in described Aerobic Pond.
Described anoxic pond comprises the first anoxic pond and the second anoxic pond, and the part of contaminated water in described Aerobic Pond is back in the second anoxic pond.
Part of contaminated water in described first anoxic pond is back in anaerobic pond.
Compared with prior art, the invention has the beneficial effects as follows: the present invention is by arranging sludge reflux mechanism, nitrification liquid backflow mechanism and anaerobism liquid backflow mechanism, and floating stuffing is filled in Aerobic Pond, make integrated sewage treating apparatus good to the treatment effect of nitrogen, phosphorus in sewage, processing efficiency is high, and compact construction, floor space is little.In addition, the present invention is by optimizing the settling tank structure in integrated sewage treating apparatus, and the sedimentation effect that improve settling tank is good, and significantly can reduce Mud up-floating phenomenon and the content going out water suspension.
Nitrogen pollutant (mainly ammonia nitrogen) in sewage is converted into nitric nitrogen through nitrification in Aerobic Pond, and nitrification has just transformed the form of nitrogen, also not really except the nitrogen in decontaminated water, thus need, by denitrification, nitric nitrogen is converted into nitrogen, ensure that the total nitrogen in water outlet is up to standard, the present invention carries out anoxic denitrification effect by being back in the second anoxic pond by the nitric nitrogen in Aerobic Pond, and by the denitrification dephosphorization effect of the first anoxic pond, nitric nitrogen is converted into nitrogen removing.
Phosphorus in sewage removes mainly through the effect of Denitrifying Phosphate Accumulating Organisms, Denitrifying Phosphate Accumulating Organisms under anoxic condition can excess by the phosphorus suction body in sewage, the phosphorus content in body is made to exceed the several times of the phosphorus content in general bacterial body, Denitrifying Phosphate Accumulating Organisms in the present invention is mainly through drawing the environment domestication forming anaerobic/anoxic alternate run in the liquid return in the first anoxic pond to anaerobic pond, Denitrifying Phosphate Accumulating Organisms transfers phosphorus at anaerobic state, organism a large amount of in simultaneously stability sewage also stores in vivo, after entering anaerobic environment, with NO
3 -for electron acceptor(EA), the carbon source material stored in body is as electron donor, Denitrifying Phosphate Accumulating Organisms completes the absorption of denitrification denitrogenation and excess phosphorus simultaneously, nitre state salt (mainly nitrate) is converted into nitrogen effusion water body, phosphoric acid salt then by Denitrifying Phosphate Accumulating Organisms excessive consumption and in form of a sludge outside discharger, thus reaches the object of dephosphorization denitrogenation.
By arranging the first baffle plate and second baffle and settling tank is divided into inhalant region in the body of settling tank pond, settling region and exhalant region, after sewage enters settling tank from the water-in of settling tank, sewage from top to bottom moves in inhalant region and in the inflow settling region, below of the first baffle plate, and then through the inflow exhalant region, below of second baffle, the bottom of sewage oblique second baffle in settling region moves upward, most of particulate matter in sewage is sunk because of action of gravity, sewage moves upward after flowing into exhalant region, particulate matter residual in sewage precipitates further, thus improve the sedimentation effect of settling tank, reduce the water outlet concentration of suspension of settling tank.Meanwhile, the top arranging second baffle, higher than the most high liquid level (HLL) position of settling tank, can stop that the mud scum that liquid level may exist flows into exhalant region, ensure the treatment effect of settling tank.Bottom and the water outlet 15-30cm apart of second baffle are set, when both can prevent liquid fluctuating, part mud scum entered exhalant region by below liquid level, can make again have as far as possible large difference of altitude bottom the first baffle plate with bottom second baffle, increase the distance that sewage moves upward, improve sedimentation effect.Taper sludge bucket is set in the bottom of settling tank, the mud that is precipitated out can be made more concentrated and be easier to discharge from the bottom of taper sludge bucket, reduce the dead angle of settled sludge.Two taper sludge buckets are set bottom settling tank, the conical surface of the space inner conical sludge bucket at formed objects can be made more to tilt, be easier to mud to discharge, reduce the generation of deposition.Sewage flows into inhalant region again through water distributor, sewage can be made to flow in inhalant region with the form in face, improve settlement of sewage effect.
The present invention passes through A
3/ O technique is combined with MBBR, introduces denitrification synchronous denitrogen dephosphorus technology, improves the ability that MBBR removes nitrogen, phosphorus.Adopt combined stuffing and floating stuffing to provide microorganic adhesion place, in reactor, microbe species and quantity improve greatly, thus the time that minimizing sewage stops in systems in which, reduce the floor space of integrated sewage treating apparatus.Adopt air-lift device to carry out nitrification liquid backflow, the backflow of anaerobism liquid and the backflow of anoxic liquid, can system energy consumption be reduced, save running cost.
Accompanying drawing explanation
Fig. 1 is the A of embodiment 1
3the schematic diagram of each pond body putting position in/O-MBBR integrated sewage treating apparatus;
Fig. 2 is the A of embodiment 1
3the structural representation of pre-denitration pond in/O-MBBR integrated sewage treating apparatus, anaerobic pond and anaerobism liquid backflow mechanism;
Fig. 3 is the A of embodiment 1
3the schematic diagram of settling tank and sludge reflux mechanism in/O-MBBR integrated sewage treating apparatus;
Fig. 4 is the A of embodiment 2
3the schematic diagram of each pond body putting position in/O-MBBR integrated sewage treating apparatus;
Fig. 5 is the structural representation of the settling tank in the integrated sewage treating apparatus of comparative example 2.
Embodiment
In order to more fully understand technology contents of the present invention, below in conjunction with specific embodiment, technical scheme of the present invention being described further and being illustrated.
Embodiment 1
With reference to Fig. 1-3, a kind of A that the present embodiment provides
3/ O-MBBR integrated sewage treating apparatus, comprise be communicated with successively pre-denitration pond 110, anaerobic pond 120, anoxic pond 130, Aerobic Pond 140, settling tank 150 and clean water basin 160, and equipment room 170, sludge reflux mechanism, nitrification liquid backflow mechanism, anaerobism liquid backflow mechanism, uv steriliser and blower fan.
The water outlet of pre-denitration pond 110, anaerobic pond 120, anoxic pond 130 and Aerobic Pond 140 and the diagonal angle of water-in all in vertical direction arrange that (water-in as pre-denitration pond 110 is located at above the pool wall in the upper right corner, pre-denitration pond 110 as shown in Figure 1, water outlet is then located at below the pool wall in the lower left corner, pre-denitration pond 110, and other three pond bodies by that analogy).The water outlet of settling tank 150 and clean water basin 160 and water-in diagonal angle all in horizontal direction arranges (water-in as settling tank is located at above the pool wall in settling tank 150 lower left corner as shown in Figure 1, and water outlet is then located at above the pool wall in settling tank 150 upper right corner).Further, in clean water basin 160, arrange a water pipe be connected with water outlet, this water pipe extends the bottom of water outlet, prevents short stream.By water inlet pipe 111, the sewage of outside is sent in pre-denitration pond 110 by the water-in in pre-denitration pond 110, by rising pipe 161, the water of clean water basin 160 is exported to the outside of clean water basin 160 by the water outlet of clean water basin 160.Uv steriliser installed by the rising pipe 161 of clean water basin 160, water is just finally discharged after sterilization.
Floating stuffing is filled with in Aerobic Pond 140, described floating stuffing is made up of modified polymer material, if Taylor's garland etc. is (in other embodiment scheme, described floating stuffing can also be at least one in polyethylene carrier, sponge filler and modification biological filler), the packing ratio of floating stuffing is the 0.25-0.5 ratio of the volume of Aerobic Pond 140 (volume of floating stuffing with).And be provided with aeration tube in Aerobic Pond 140, aeration tube is then connected with blower fan, provides air by blower fan, blower fan is installed in equipment room 170.
Combined stuffing is hung with respectively in pre-denitration pond 110, anaerobic pond 120 and anoxic pond 130, the structure of described combined stuffing is fixed on by multiple plastic hoop on an axial cord, then hydroformylation fiber or POLYESTER YARNS are pressed on the ring of ring, fibrous bundle is uniformly distributed; Inner ring is flakes plastics branches.
The first air-lift device is provided with in anaerobic pond 120, this first air-lift device comprises the first riser tube 181 and the first inlet pipe 182, the import of the first riser tube 181 extends near the water outlet of anaerobic pond 120, the outlet of the first riser tube 181 then extends near the water-in in pre-denitration pond 110, one end of first inlet pipe 182 is communicated with the first riser tube 181, and be connected to the vicinity (if junction is from ingress 3-20cm) of the first riser tube 181 import, the other end of the first inlet pipe 182 is then connected with the blower fan of equipment room 170, by blower fan, air is sent in the first riser tube 181, the anaerobism liquid in anaerobic pond 120 is made to be able to be back in pre-denitration pond 110 by the first riser tube 181, form anaerobism liquid backflow mechanism thus.
The second air-lift device is provided with in Aerobic Pond 140, this second air-lift device comprises the second riser tube and the second inlet pipe, the import of the second riser tube extends near the water outlet of Aerobic Pond 140, the outlet of the second riser tube then extends near the water-in of anoxic pond 130, one end of second inlet pipe is communicated with the second riser tube, and be connected to the import neighbouring (if junction is from ingress 3-20cm) of the second riser tube, the other end of the second inlet pipe is then connected with the blower fan of equipment room 170, by blower fan, air is sent in the second riser tube, the nitrification liquid in Aerobic Pond 140 is made to be able to be back in anoxic pond 130 by the second riser tube, form nitrification liquid backflow mechanism thus.
Described settling tank 150 comprises settling tank pond body and taper sludge bucket, is provided with the first baffle plate 152, second baffle 154, inhalant region, settling region, exhalant region, water distributor 151, water pipe and effluent weir 153 in the body of settling tank pond.Described settling tank pond body is cubes, and height is 2m.Be arranged side by side two taper sludge buckets in the bottom of settling tank pond body, the upper end-face edge of taper sludge bucket is fixedly connected with the bottom of settling tank pond body, and settling tank pond body and two taper sludge buckets are configured for the accommodation space storing sewage and mud thus.In the bottom of taper sludge bucket, one mud discharging mouth is set respectively, at mud discharging mouth place, mud valve is installed, described mud valve is motorized valve, for being discharged by the mud in taper sludge bucket outside integrated sewage treating apparatus in time and being back in anaerobic pond 120 through sludge reflux mechanism.First gear 152 plate and second baffle 154 are set in parallel in the body of settling tank pond, first baffle plate 152 is fixedly connected with two pool walls of settling tank pond body respectively with the dual-side of second baffle 154, and the first baffle plate 152 is not contacted with the conical wall of taper sludge bucket with the bottom of second baffle 154, the most high liquid level (HLL) position place of top higher than settling tank pond body of the first baffle plate 152 and second baffle 154 is also set simultaneously, even if the extended most high liquid level (HLL) in the top of the first baffle plate 152 and second baffle 154.In addition, the conical wall 20cm of the taper sludge bucket of the distance from bottom of the first baffle plate 152 immediately below it, the bottom of second baffle 154 is then positioned at 20cm below the most high liquid level (HLL) position place of settling tank pond body, thus makes the bottom of bottom lower than second baffle 154 of the first baffle plate 152.Thus, the formation inhalant region, region between the first baffle plate 152 and the first pool wall 158, the volume of inhalant region is the 5-10% of settling tank pond body cubic capacity; Formation exhalant region, region between second baffle 154 and the second pool wall 159, the volume of exhalant region is the 1-3% of settling tank pond body cubic capacity; Formation settling region, region between first baffle plate 152 and second baffle 154; Inhalant region is communicated with the below of settling region at the first baffle plate 152, and settling region is communicated with the below of exhalant region at second baffle 154.Water-in through settling tank 150 arranges a water pipe, one end of water pipe is connected with Aerobic Pond 140, the other end of water pipe is connected with the water distributor 151 be located in inhalant region, described water distributor 151 is horizontally disposed with, and the tube wall of this water distributor 151 one side bottom the body of settling tank pond arranges a discharge water hole.Sewage flows into water distributor 151 by water pipe, and then flow into inhalant region from posticum, sewage from top to bottom moves in inhalant region.Arranging water distributor 151 can make sewage flow in inhalant region with the form in face, improves settlement of sewage effect.The water outlet of settling tank 150 is located at the slightly below at the most high liquid level (HLL) position place of settling tank pond body, and arranges an effluent weir 153 at water outlet, and the sewage after settling tank 150 processes is flowed in clean water basin 160 by water outlet.A sludge reflux mechanism is also provided with in the bottom of settling tank pond body, this sludge reflux mechanism comprises the first mud import 155 and the second mud import 156, first mud import 155 is connected with the mud discharging mouth of two taper sludge buckets by pipeline respectively with the second mud import 156.These two mud imports are finally convergeed to by pipeline and form a total pipeline 157 together, for anaerobic pond 120 carries mud.
When using this settling tank 150 pairs of sewage to carry out precipitation process, sewage flows into inhalant region via the posticum on water distributor 151 and from top to bottom moves in inhalant region, flows to the bottom of inhalant region afterwards through the inflow settling region, space below the first baffle plate 152.The left bottom of sewage in settling region moves to the bottom of second baffle 154 to upper right side, settling region, sewage is in the process of moving obliquely in settling region, particulate matter in sewage is under gravity then to sinking, particulate matter is contrary with the direction of motion of water, thus improves the separating effect of particulate matter and water.Sewage moves to the bottom of second baffle 154 and enters exhalant region, from bottom to top moves in exhalant region, then through effluent weir 153, flow to clean water basin 160 from water outlet.The particle precipitated forms mud, is gathered in taper sludge bucket, and the mud in taper sludge bucket is then discharged by the mud discharging mouth bottom taper sludge bucket.In the settlement of sewage process continued, can produce mud scum in a small amount unavoidably, second baffle 154 by mud scum shelves on the liquid level of settling region, thus can ensure effluent characteristics, reduces the suspension content in water outlet.
In other embodiments, the distance that also can arrange the bottom of second baffle 154 and the most high liquid level (HLL) position of settling tank pond body is 15-30cm, and oblique second sidewall in the bottom that second baffle 154 can be set, to increase the volume of settling region, thus improve sedimentation effect further, the height of settling tank pond body also visual actual design needs and changes, and it is highly not limited to 2m.Water in clean water basin also can adopt the mode of adding disinfectant to carry out disinfection.
The method of sewage disposal is: sent in pre-denitration pond 110 by the water-in in pre-denitration pond 110 by the sewage of outside by water inlet pipe 111, then makes sewage flow through pre-denitration pond 110, anaerobic pond 120, anoxic pond 130, Aerobic Pond 140 and settling tank 150 successively and processes; Part of contaminated water in anaerobic pond 120 is back in pre-denitration pond 110 through anaerobism liquid backflow mechanism; Part of contaminated water in Aerobic Pond 140 is back in anoxic pond 130 through nitrification liquid backflow mechanism; The partial sludge be precipitated out in settling tank 150 is back in anaerobic pond 120 through sludge reflux mechanism, and the sewage precipitated through settling tank 150 then enters in clean water basin 160.Water in clean water basin 160 is discharged after being installed in the uv steriliser sterilization on rising pipe 161.
In above-mentioned each backflow mechanism, anaerobism liquid reflux ratio is 100-200%, and mixed liquid recycle ratio is 100-200%, and return sludge ratio is 50-100%.(reflux ratio refers to the ratio of the quantity of reflux of phegma and the liquid inlet volume flowed into by water-in.)
Embodiment 2
With reference to Fig. 4, a kind of A that the present embodiment provides
3/ O-MBBR integrated sewage treating apparatus, its structure and the A described in embodiment 1
3/ O-MBBR integrated sewage treating apparatus is substantially identical, and difference is: the anoxic pond in embodiment 1 be divided into two, and namely at centre dividing plate, anoxic pond is separated into the first anoxic pond 231 and the second anoxic pond 232.In the upper left corner of dividing plate, one connected entrance is set, and a water pipe be connected with the water-in of the first anoxic pond 231 is set in the first anoxic pond 231, this water pipe extends bottom the pond body in first anoxic pond 231 lower right corner as shown in Figure 4, makes the water inlet position in the first anoxic pond 231 and water exit position be that the diagonal angle of vertical direction is arranged.
A
3in/O-MBBR integrated sewage treating apparatus, pre-denitration pond 210, anaerobic pond 220, first anoxic pond 231, second anoxic pond 232, Aerobic Pond 240, settling tank 250 are communicated with successively with clean water basin 260.In addition, the mechanism that refluxed by nitrification liquid is located between Aerobic Pond 240 and the second anoxic pond 232, and between the first anoxic pond 231 and anaerobic pond 220, sets up anoxic liquid to reflux mechanism.
The method of sewage disposal is: sent in pre-denitration pond 210 by the water-in in pre-denitration pond 210 by the sewage of outside by water inlet pipe 211, then makes sewage flow through pre-denitration pond 210, anaerobic pond 220, first anoxic pond 231, second anoxic pond 232, Aerobic Pond 240 and settling tank 250 successively and processes; Part of contaminated water in anaerobic pond 220 is back in pre-denitration pond 210 through anaerobism liquid backflow mechanism; Part of contaminated water in first anoxic pond 231 is back in anaerobic pond 220 through anoxic liquid backflow mechanism; Part of contaminated water in Aerobic Pond 240 is back in the second anoxic pond 232 through nitrification liquid backflow mechanism; The partial sludge be precipitated out in settling tank 250 is back in anaerobic pond 220 through sludge reflux mechanism, and the sewage precipitated through settling tank 250 then enters in clean water basin 260.Water in clean water basin 260 is discharged after being installed in the uv steriliser sterilization on rising pipe 261.
In above-mentioned each backflow mechanism, anaerobism liquid reflux ratio is 100-200%, and anoxic liquid reflux ratio is 100-200%, and mixed liquid recycle ratio is 100-200%, and return sludge ratio is 50-100%.
Comparative example 1
A kind of integrated sewage treating apparatus that this example provides, its structure and the A described in embodiment 1
3/ O-MBBR integrated sewage treating apparatus is substantially identical, and difference is: cancel the anaerobism liquid backflow mechanism in embodiment 1, nitrification liquid backflow mechanism and sludge reflux mechanism.In integrated sewage treating apparatus, pre-denitration pond, anaerobic pond, anoxic pond, Aerobic Pond, settling tank are communicated with successively with clean water basin.
The method of sewage disposal is: make sewage flow through pre-denitration pond, anaerobic pond, anoxic pond, Aerobic Pond and settling tank successively and process; Sewage through settling tank precipitation then enters in clean water basin.Water in clean water basin is discharged after being installed in the uv steriliser sterilization on rising pipe.
Comparative example 2
A kind of integrated sewage treating apparatus that this example provides, its structure and the A described in embodiment 1
3/ O-MBBR integrated sewage treating apparatus is substantially identical, and difference is: the structure of settling tank is different.Settling tank in this example as shown in Figure 5, one sidewall of this settling tank is provided with water-in, and another sidewall is in opposite directions provided with water outlet, and the water-in through settling tank arranges a water pipe, water pipe extends the bottom of settling tank, and its volume is identical with the volume of the settling tank described in embodiment 1.
The method of sewage disposal is: make sewage flow through pre-denitration pond, anaerobic pond, anoxic pond, Aerobic Pond and settling tank successively and process; Sewage through settling tank precipitation then enters in clean water basin.Water in clean water basin is discharged after being installed in the uv steriliser sterilization on rising pipe.
Use above-described embodiment 1-2 and the sewage at the identical water source of integrated sewage treating apparatus process of comparative example 1-2 respectively, then detect the indices of each integrated sewage treating apparatus water outlet respectively.Detected result is as shown in the table.
From upper table data, sewage is through the A of embodiment 1 and 2
3after the process of/O-MBBR integrated sewage treating apparatus, good obviously than comparative example 1 and 2 of water outlet situation, and the A of embodiment 2
3good than embodiment 1 of the treatment effect of/O-MBBR integrated sewage treating apparatus.
Only further illustrate technology contents of the present invention with embodiment described in upper, so that reader is easier to understand, but does not represent embodiments of the present invention and be only limitted to this, any technology done according to the present invention extends or recreation, all by protection of the present invention.
Claims (10)
1. an A
3/ O-MBBR integrated sewage treating apparatus, comprise be communicated with successively pre-denitration pond, anaerobic pond, anoxic pond, Aerobic Pond, settling tank and clean water basin, it is characterized in that: in described Aerobic Pond, be filled with floating stuffing; Sludge reflux mechanism is provided with between described settling tank and anaerobic pond; Be provided with nitrification liquid between described Aerobic Pond and anoxic pond to reflux mechanism; Be provided with anaerobism liquid between described anaerobic pond and pre-denitration pond to reflux mechanism.
2. a kind of A according to claim 1
3/ O-MBBR integrated sewage treating apparatus, is characterized in that: described anoxic pond comprises the first anoxic pond and the second anoxic pond, and described nitrification liquid backflow mechanism is located between Aerobic Pond and the second anoxic pond.
3. a kind of A according to claim 2
3/ O-MBBR integrated sewage treating apparatus, is characterized in that: be provided with anoxic liquid between described first anoxic pond and anaerobic pond and reflux mechanism.
4. a kind of A according to claim 1
3/ O-MBBR integrated sewage treating apparatus, is characterized in that: described settling tank comprises settling tank pond body, is also provided with the first baffle plate and second baffle in the body of described settling tank pond; The top of described first baffle plate and second baffle is higher than the most high liquid level (HLL) position of settling tank pond body, and the bottom of the first baffle plate is lower than the bottom of second baffle; Region between described first baffle plate and the first pool wall is in opposite directions inhalant region, region between described second baffle and the second pool wall is in opposite directions exhalant region, region between first baffle plate and second baffle is settling region, and inhalant region, settling region, exhalant region are interconnected in the below of the first baffle plate and second baffle.
5. a kind of A according to claim 4
3/ O-MBBR integrated sewage treating apparatus, is characterized in that: the bottom of described second baffle is positioned at the below of water outlet, and the distance of the most high liquid level (HLL) position of the bottom of second baffle and settling tank pond body is 15-30cm.
6. a kind of A according to claim 5
3/ O-MBBR integrated sewage treating apparatus, is characterized in that: the bottom of described settling tank pond body is provided with taper sludge bucket.
7. a kind of A according to claim 1
3/ O-MBBR integrated sewage treating apparatus, is characterized in that: in described Aerobic Pond, the packing ratio of floating stuffing is 0.25-0.5.
8. a sewage water treatment method, makes sewage flow through pre-denitration pond, anaerobic pond, anoxic pond, Aerobic Pond and settling tank successively and processes, it is characterized in that: the part of contaminated water in described anaerobic pond is back in pre-denitration pond; Part of contaminated water in described Aerobic Pond is back in anoxic pond; The partial sludge be precipitated out in described settling tank is back in anaerobic pond, and the sewage through settling tank precipitation then enters in clean water basin; Floating stuffing is filled with in described Aerobic Pond.
9. a kind of sewage water treatment method according to claim 8, is characterized in that: described anoxic pond comprises the first anoxic pond and the second anoxic pond, and the part of contaminated water in described Aerobic Pond is back in the second anoxic pond.
10. a kind of sewage water treatment method according to claim 9, is characterized in that: the part of contaminated water in described first anoxic pond is back in anaerobic pond.
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