CN105461054A - Integrated treatment plant for sewage from biological removal of nitrogen - Google Patents
Integrated treatment plant for sewage from biological removal of nitrogen Download PDFInfo
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- CN105461054A CN105461054A CN201410394125.7A CN201410394125A CN105461054A CN 105461054 A CN105461054 A CN 105461054A CN 201410394125 A CN201410394125 A CN 201410394125A CN 105461054 A CN105461054 A CN 105461054A
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Abstract
The present invention is an improvement on anoxic (facultative anaerobic)-aerobic water treatment device for biological nitrogen removal. The adjacent partition arrangement forming inner circulation is that an anoxic zone is arranged on the outer periphery of the aerobic zone; a gas-liquid separation diversion inclined plate is arranged above an overflow circumference on the upper part of the aerobic zone; and an inlet water distribution zone is disposed above the anoxic zone, and extends into a water distributor below the liquid surface of the anoxic zone for water distribution. The structure effectively overcomes or reduces the disadvantage of oxygenation caused by water inlet and reflux in the anoxic zone in the prior art, reduces or restricts the water inlet and oxygenation into the anoxic zone, helps to control the dissolved oxygen in a low required range in the anoxic zone, and satisfies the requirements of hypoxia of denitrifying bacteria, thereby increasing the effect of denitrification and nitrogen removal. The plant can omit additional power upgrade reflux and an anoxic zone mixing device, thereby reducing the energy consumption.
Description
Technical field
The present invention is the improvement lacking (holding concurrently) oxygen-aerobic water treatment device to being mainly used in biological denitrificaion, particularly relate to a kind of internal-circulation type, do not need to promote power in addition, power consumption is little, and phegma, water distribution are few to anoxic pond oxygenation, be conducive to the integrated biological denitrification waste disposal plant keeping low DO in anoxic pond.
Background technology
Body eutrophication problem more and more causes the concern of people, and effluent-disposal standard also improves thereupon, and sewage disposal is no longer only to remove for the purpose of BOD and SS, and the removal of the nutritive substance such as nitrogen, phosphorus becomes sewage disposal important control target.Based on anaerobic-aerobic (A/O) bio-denitrification technology that traditional nitrification-denitrification is developed, be employed in water treatment because denitrification effect is good.Common A/O process unit, adopt and separately in two or more ponds, carry out aerobic nitrification and anoxic denitrification technique respectively, sewage is introduced into anoxic pond, flow into Aerobic Pond with gravity, then by reflux pump or air-lift device, return line etc., muddy water mixed solution a certain amount of in Aerobic Pond (abbreviation phegma) is back to anoxic pond and completes denitrification denitrogenation.This structure anoxia/aerobic biological denitrification, actual denitrification effect is not very high, and make the superiority of anoxia/aerobic biological denitrification fail to play cmpletely, main deficiency has: one point of pond is built, and floor space is large, and cost of investment is large; Two Aerobic Ponds need extra increase backflow to promote power to anoxic pond backflow, and phegma quantity of reflux is usually larger, such as reflux ratio is up to about 200%, and fully mix with water inlet and anoxic pond sewage for making phegma, also need increase whipping appts in anoxic pond, so auxiliarypower consumption is larger; Three anoxic denitrification effects play must carry out under comparatively low dissolved axygen (DO) such as DO≤0.5mg/l, and objectively aerobic nitrification needs higher DO (2.0-4.0mg/l), a large amount of Aerobic Pond phegma directly enters anoxic pond, add anoxic pond to be uniformly mixed, and anoxic pond water inlet adopts falling type, three factors all can cause DO in anoxic pond to raise (latter two for bringing air into), therefore low DO needed for anoxic pond is caused to maintain comparatively difficulty, thus reducing denitrification denitrogenation ability, this causes the dissatisfactory major cause of denitrification effect; Four nitrification-denitrification mainly adopt the mud method of active sludge, and excess sludge generation is large, carries out sludge treatment again, is more the increase in running cost.
For this reason, people have invented integrated Anoxybiotic-aerobic biologic nitrogen rejection facility, are arranged at by anoxic-aerobic process in same device or structures (to separate with pond) to form internal reflux circulation, attempt the deficiency overcoming upper aforementioned prior art, such as.
Chinese patent CN2410293 integral synchronous denitrification biological treatment reactor, has the first hypoxia response district A in turn; First aerobic zone of action B; Second hypoxia response district C; Second aerobic zone of action D; Depositing separation area E.Wherein arrange stripping reflux pipe between aerobic zone B district and oxygen-starved area A, aerobic zone B water directly enters the second oxygen-starved area C.
Chinese patent CN201395547 waste disposal plant, comprise the hypoxia response district that adjacent base successively communicates and the aerobic reactor zone being provided with filler and aerating apparatus, arrange former water water inlet pipe above hypoxia response district, being provided with between hypoxia response district and aerobic reactor zone refluxes stitches.
Chinese patent CN101935132AA2/O-microbial film synchronous denitrification dephosphorizing device, comprises the anaerobic pond, anoxic pond, the first Aerobic Pond, the second Aerobic Pond and the settling tank that connect successively; Have stirring rake respectively in anaerobic pond and anoxic pond, the second Aerobic Pond is connected with anoxic pond with mixed-liquor return pump by pipeline, and settling tank is connected with anaerobic pond with sludge reflux pump by pipeline; Floating stuffing is dispersed with in first Aerobic Pond second Aerobic Pond.
Chinese patent CN101439908 anaerobic multi-stage aerobic-anoxic dephosphorization and denitrification process, comprise anaerobism, aerobic, anoxic order is carried out a biological disposal upon, and carry out secondary sedimentation, sewage is divided into two portions, anaerobic pond is entered after the sewage of about 30% mixes with returned sluge, all the other most sewage surmount multiple anoxic pond that anaerobic pond divides multiple spot to enter and Aerobic Pond interval communicates and carry out denitrification, residue small portion sewage enters second pond together with the mixed solution flowed out in last Aerobic Pond, and after the mud-water separation in second pond, excess sludge is discharged in timing.
Chinese patent CN201485360U multistage multistage AO dephosphorization denitrogenation reactive system, comprise and set gradually anaerobic zone, aerobic zone and the supporting district of one to Pyatyi Anoxic/Aerobic, reflux sludge tube is connected with anaerobic zone.
Chinese patent CN201313854 anoxic/aerobic integrated formula circulating biological reactor, in the middle of square reactor, arrange two pieces of baffle plates, centre is aerobic area, and both sides are aerobic zone, and top, aerobic area arranges sludge settling device, forms circulation by air lift.
Above-mentioned in same pond by point being separated with one group of anoxic pond and Aerobic Pond or many groups alternately, form internal reflux circulation, take up an area and investment although eliminate, and some employing biologic packing materials reduce mud produces; But they still exist, and Aerobic Pond height dissolved oxygen sewage directly enters anoxic pond, anoxic pond water inlet adopts falling type, can cause anoxic pond oxygenation equally; And still separately to establish the power consumption of power-lift phegma large, this two large shortcoming still fails to be overcome, and particularly Aerobic Pond height DO phegma band oxygen causes anoxic pond oxygenation, is difficult to satisfied best anoxic denitrification to low DO requirement, still restricts efficient denitrification.The low DO of anoxic pond controls the major obstacle that difficult problem becomes the performance of Anoxybiotic-aerobic biologic denitrification effect.Make water-in be arranged on bottom aerobic zone although Chinese patent CN201313854 adopts, cause oxygenation to reduce water inlet, oxygen-starved area denitrifying bacterium can not be allowed preferentially to obtain the high carbon source of water inlet, affect biological denitrificaion usefulness equally and play; In addition intake and to carry out directly to aerobic zone, easily causing disposes of sewage directly enters settling tank short-circuit flow in air-lift unit process; Settling tank is arranged on above aerobic area simultaneously, makes Whole Equipment complex structure, and is unfavorable for management maintenance.
Above-mentioned deficiency still has the place being worth improving.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, and provide a kind of backflow oxygenation little, water inlet is not separately with oxygen, effectively can maintain the low DO in oxygen-starved area, Nitrogen removal effect is good, and need not reflux by power-lift separately, the integrated biological denitrification waste disposal plant that operation energy consumption is low.
The object of the invention realizes, and main improvement one makes oxygen-starved area be arranged on periphery, aerobic zone, and the current lift provided by aeration, has been flow automatically to oxygen-starved area and refluxed; Two is first discharge wherein high dissolved oxygen in reflux course, reduces dissolved oxygen content in phegma; Three is do not touch with air to oxygen-starved area water inlet, under water inlet directly passes into oxygen-starved area liquid level, stop to bring air into into water, thus be conducive to maintaining DO low needed for anoxic pond, denitrification is carried out at optimum conditions, and omission phegma separately establish lifting power, reduces operation energy consumption, thus overcome above-mentioned the deficiencies in the prior art, realize the object of the invention.Specifically, integrated biological denitrification waste disposal plant of the present invention, comprise into water water distribution area, the anoxic that adjacent separation is arranged, communicate up and down and aerobic reactor zone, and built-in biological filler, it is characterized in that said adjacent separation is set to oxygen-starved area and arranges in periphery, aerobic zone, above top, aerobic zone overflow periphery, have gas-liquid separation flow guiding inclined plate; Water inlet water distribution area is arranged on above oxygen-starved area, and by stretching into the subsurface water distributor water distribution in oxygen-starved area.
Before the detailed description, first by inventing the basic function that can reach and effect makes a presentation, to make this area
Technician has one clearly to understand to this patent general plotting technical scheme.
Apparatus of the present invention, because oxygen-starved area is arranged in periphery, aerobic zone, thus formed and larger overflow back flow area, (sewage mixes a large amount of microporous bubble to make it possible to the up-flow effect that produced by aeration oxygen supply, density diminishes, and volume becomes and forms up-flow greatly), and bottom aeration plays suction function to the sewage of coming bottom oxygen-starved area, both form the up-flow internal recycle meeting the large reflux cycle amount to oxygen-starved area at acting in conjunction, thus can economize bigger backflow and promote power; Gas-liquid separation flow guiding inclined plate above top, aerobic zone overflow periphery, aerobic zone up-flow phegma is stopped by this swash plate, both the guide functions of oriented oxygen-starved area backflow, mainly make up-flow phegma hit swash plate makes wherein dissolved oxygen (DO) steam bubble be separated with water simultaneously, and depart from phegma by the wall attachment effect floating of swash plate, enhance gas-liquid separation in phegma, thus reduce and enter DO content in the phegma of oxygen-starved area, thus effectively reduce aerobic zone phegma to oxygen-starved area oxygenation; Water inlet water distribution area is arranged on above oxygen-starved area, and complete water distribution by stretching into the subsurface water distributor in oxygen-starved area, the water inlet of such oxygen-starved area does not contact with air, also eliminate oxygen-starved area water inlet and bring air (O) into, water distribution area of simultaneously intaking is arranged on above oxygen-starved area, also be conducive to forming large cloth water area, and do not increase equipment sectional area (not increasing cloth water area), and large cloth water area, also help and bring the even of carbon source into into water, add that backflow adopts side face overflow, thus can omit oxygen-starved area mix and blend.Aerobic zone phegma oxygen release and water inlet or less do not take oxygen, both reduce oxygen-starved area oxygenation at acting in conjunction (being mainly the former), thus be conducive to maintaining low DO (such as DO≤0.5mg/l) the denitrification top condition in oxygen-starved area, thus can there is high denitrification denitrogenation effect; Pool structure is arranged and the backflow of aeration up-flow, and save and separately establish lifting power, and oxygen-starved area is stirred, both form the present invention and innovate difference feature.
In the present invention.
Pond type plane, is not particularly limited, and according to water treatment process design requirement, can be conventional rectangle or circle.Wherein one preferably rectangle, is conducive to coordinating with such as settling region, subsequent process pond.Oxygen-starved area is arranged in periphery, aerobic zone, different according to plane pond type, such as, can arrange in both sides, aerobic zone for rectangle form pool, and circular pond then can be arranged by concentric ring in addition.
To intake above oxygen-starved area water distribution area, can cross section same with oxygen-starved area, also can different cross section, specifically require that design is determined depending on the cloth water yield.The subsurface water distributor in oxygen-starved area is stretched in water inlet water distribution area, be mainly used in air-isolation to oxygen-starved area water distribution, its quantity and form can have multiple, as long as meet the cloth water yield require and make into water evenly as far as possible, wherein one is better adopt multiple spot pipe or rectangular water distribution, be conducive to entering oxygen-starved area water inlet and phegma mixes with oxygen-starved area sewage, can make to still have good mixed effect omitting under whipping appts.
Gas-liquid separation flow guiding inclined plate above top, aerobic zone overflow periphery, its effect mainly makes up-flow phegma clash into and produces gas, liquid centrifugation, and water conservancy diversion enters oxygen-starved area, thus reduction enters DO in the phegma of oxygen-starved area, therefore gas-liquid separation device in water treatment, also can be employed, just swash plate structure is simpler.Said swash plate can be smooth plate, and also can be porous plate, phegma enters oxygen-starved area by porous plate eyelet.
Filler in oxygen-starved area and aerobic zone, it acts on same prior art, mainly through filler adheres biological action, increase nitrated and denitrifying bacteria biomass, reduce mud to produce, therefore in water-treatment biological embrane method, all fillers all can be employed, for simplifying structure, preferably adopt a fixed bed for fixing filler, such as, hang combined stuffing.
Be one step improve device be the better effect realizing goal of the invention, can also be preferably.
Gas-liquid separation flow guiding inclined plate above top, aerobic zone overflow periphery, test better and horizontal plane angle α between 45 °-60 °, more be conducive to the gas-liquid separation effect under raising low flow velocity, thus make DO spilling as much as possible in the phegma of aerobic zone, guarantee to enter the low DO content of oxygen-starved area phegma._ _ [0023] oxygen-starved area and aerobic zone useful volume ratio, test preferably 1:1.5-2.5.
Aerobic zone water outlet weir plate or follow-up connection water outlet weir plate of settling pond, a kind of better employing oscilaltion is movable, water outlet weir plate upper-lower height is adjustable, can play and indirectly control aerobic, oxygen-starved area height of liquid level, thus indirectly control nitrification liquid quantity of reflux and oxygen-starved area dissolved oxygen (DO), such as water outlet weir plate raises, and nitrification liquid quantity of reflux increases, otherwise then contrary.
Oxygen-starved area is located with communicating bottom aerobic zone, and one is better be provided with flow guiding inclined plate, flow guiding inclined plate, has both been conducive to reducing circulation head loss, can eliminate current dead angle again simultaneously, and issuable sludge settling.Flow guiding inclined plate better and horizontal sextant angle β at 45 ° ± 5 °.
DO content in the phegma of oxygen-starved area is entered for reducing aerobic zone further, one is more preferably and adds the permeable baffle plates such as grid, web plate, Eight characters plate under the liquid level of top, aerobic zone, up-flow liquid clashes into this permeable baffle plate, be conducive to microbubble in water and assemble increase, not only assemble air pocket and can overflow the water surface " escape ", simultaneously again through top gas-liquid separation flow guiding inclined plate, be more conducive to removing when overflowing back liquid, be more reduction of DO content in phegma.This contributes to the permeable baffle plate of bubble separation, can be to cover aerobic zone total cross section, also can be part, such as, form interior ring lid structure in overflow surrounding.
Integrated biological denitrification waste disposal plant of the present invention, relative to prior art, owing to adopting said structure, by multiple reduction or restriction to the oxygen measure of oxygen-starved area water inlet band (the nitrated phegma in aerobic zone through be separated degassed after enter oxygen-starved area, do not contact with air to oxygen-starved area water inlet), and overflow type refluxes, thin water layer more easily discharges DO, thus have and well fall DO effect, thus effectively overcome or reduce prior art and intake to oxygen-starved area, backflow causes oxygenation shortcoming, be conducive to making oxygen-starved area dissolved oxygen control at lower claimed range (such as DO≤0.5mg/l), meet the requirement of denitrifying bacteria anoxic, and then improve denitrification denitrogenation effect, improve nitrification and denitrification denitrification ability on the whole.Process water inlet enters oxygen-starved area continuously, and the denitrifying bacteria as heterotroph is excellent constantly obtains supplementary carbon source, is also conducive to giving full play to of denitrifying bacteria effect.Aerobicly to reflux with oxygen-starved area big area overflow, not only meet the large quantity of reflux under low speed up-flow, and big area overflow is conducive to and Yang Yang district sewage Homogeneous phase mixing, this structure design, is also conducive to facility compact simultaneously, reduces plant area area; Water inlet multiple spot or rectangular water distribution, improve oxygen-starved area water inlet (bringing carbon source into) and phegma mixes with oxygen-starved area sewage, makes to still have good mixed effect under omission whipping appts.Omit oxygen-starved area whipping appts, and aerobic zone separately establishes power-lift to reflux, and again reduces operation energy consumption.Adopt filler fixed-bed process with prior art, also effectively reduce mud generation.
Below in conjunction with three exemplary embodiments; essence of the present invention is understood in exemplary illustration and help further; but embodiment detail is only in order to the present invention is described; do not represent the present invention and conceive lower whole technical scheme; therefore should not be construed as the technical scheme total to the present invention to limit; some are In the view of technician; the unsubstantiality not departing from the present invention's design increases and/or changes; such as simply change with the technical characteristic with same or similar technique effect or replace, all belonging to scope.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention plan view from above.
Fig. 2 is Figure 1A-A sectional view.
Fig. 3 is Figure 1B-B sectional view.
Embodiment
Embodiment 1: see accompanying drawing, integrated biological denitrification waste disposal plant of the present invention, adopt rectangular planar structure, the middle aerobic zone C communicated up and down is divided into by dividing plate 11, oxygen-starved area, both sides B, rear side settling region D, the C-shaped distributing trough 2 of water distribution area A of wherein intaking is arranged on above the B of oxygen-starved area, oxygen-starved area B and aerobic zone C volume ratio 1:2.0.The water inlet pipe 4 extending below oxygen-starved area liquid level under many is had to oxygen-starved area water distribution bottom C type distributing trough 2; Fixing suspension biologic packing material 3 is provided with in oxygen-starved area B, aerobic zone C; Bottom oxygen-starved area communicates with aerobic zone, gradient β 45 degree of flow guiding inclined plates 5; Aerating apparatus 6 is arranged at C bottom, aerobic zone, the gas-liquid separation water conservancy diversion atresia swash plate 7 (being positioned over above aerobic/oxygen-starved area dividing plate, to oxygen-starved area inclination water conservancy diversion) of the gradient α 60 degree that (reserves overflow seam) above the side face refluxed to oxygen-starved area overflow in top; Be provided with inclined tube filler 8 in settling region D, effluent weir has the lift water outlet zig-zag weir plate 9 of adjustable (regulated quantity 10cm) up and down, and the minimum water outlet of weir plate flushes with dividing plate 11 top.
Technological process: disposing of sewage enters C type distributing trough 2 by water inlet pipe 1, after uniform water distribution, the water distributor 4 extending below oxygen-starved area liquid level under multiple by bottom vertically flows into oxygen-starved area B, brings water-inlet carbon source into simultaneously, participates in oxygen-starved area anti-nitration reaction, and enter middle aerobic zone C by bottom, aerobic nitrification reaction is carried out at this, and with the upwelling that aeration is formed, through the gas-liquid separation flow guiding inclined plate 7 of side face, after gas-liquid separation, phegma enters oxygen-starved area B, decreases backflow and brings DO into.Bottom the C of aerobic zone, water outlet enters settling region D and carries out precipitate and separate, the upper and lower adjustable water outlet zig-zag weir plate 9 of top, settling region effluent weir, and oscilaltion controls aerobic zone phegma quantity of reflux.By regulating air aeration amount, realize the DO concentration (general control DO is at about 2.0mg/L) needed for the C aerobic bacteria of aerobic zone.Aerobic zone C sewage mixing air rises and arrives top, portion of air is overflowed the water surface and is entered air, portion of air spreads to both sides with sewage, when running into the gas-liquid separation flow guiding inclined plate 7 of both sides setting, realize gas-liquid separation, reduce DO concentration in phegma, the setting of the flow guiding inclined plate of gas-liquid separation simultaneously 7 also has guide functions, phegma enters oxygen-starved area bottom gas-liquid separation flow guiding inclined plate 7, and with water inlet Homogeneous phase mixing, by diluting with water inlet, further reduction aerobic zone phegma DO, maintain low DO concentration (the being generally 0.5mg/L) anoxia condition needed for oxygen-starved area.After some nitrification-denitrification circulations, sewage flows into settling region D bottom the C of aerobic zone, guarantees good mud-water separation effect through settling region inclined tube filler 8, after inclined tube filler 8 solid-liquid separation, rises and surmounts water outlet weir plate 9, being discharged by water outlet 10.Water outlet weir plate about 9 is adjustable, indirectly controls B/ aerobic zone, oxygen-starved area C height of liquid level, realizes the control of nitrification liquid quantity of reflux and DO.
Embodiment 2: as embodiment 1, aerobic zone top liquid level has the permeable baffle plates such as grid, web plate, Eight characters plate, takes off DO effect to strengthen phegma.
Embodiment 3: as embodiment 1 or 2, pond plane adopts circular configuration, and oxygen-starved area is concentric cylindrical annular.
To those skilled in the art, under this patent design and specific embodiment enlightenment, some distortion that can directly derive from this patent disclosure and general knowledge or associate, those of ordinary skill in the art will recognize also can adopt additive method, or in prior art, commonly use substituting of known technology, and the equivalence of feature changes or modifies, mutual various combination between feature, the such as change for the treatment of unit cross-sectional shape, biologic packing material can also adopt other forms, oxygen-starved area, aerobic zone is according to disposing of sewage both useful volumes than changing, gas-liquid separation swash plate is the porous plate be affixed on above dividing plate, and adopt other to have the gas-liquid separation device of effects equivalent, etc. unsubstantiality change, can be employed equally, this patent representation function and effect can be realized, expansion of illustrating no longer is one by one described in detail, all belong to this patent protection domain.
For convenience of description, the said pond of the present invention, district are synonym; Dissolved oxygen and DO are synonym; By prior art nitrification-denitrification concept, anoxic also refers to double oxygen.
Patent device can be structures, also can be prefabrication structure.
Claims (9)
1. integrated biological denitrification waste disposal plant, comprise into water water distribution area, the anoxic that adjacent separation is arranged, communicate up and down and aerobic reactor zone, and built-in biological filler, it is characterized in that said adjacent separation is set to oxygen-starved area and arranges in periphery, aerobic zone, above top, aerobic zone overflow periphery, have gas-liquid separation flow guiding inclined plate; Water inlet water distribution area is arranged on above oxygen-starved area, and by stretching into the subsurface water distributor water distribution in oxygen-starved area.
2. integrated biological denitrification waste disposal plant according to claim 1, is characterized in that treatment unit pond type plane is rectangular.
3. integrated biological denitrification waste disposal plant according to claim 2, it is characterized in that both sides outside aerobic zone, oxygen-starved area, water distribution area is C-shaped around being arranged at top, oxygen-starved area.
4. integrated biological denitrification waste disposal plant according to claim 1, is characterized in that gas-liquid separation flow guiding inclined plate and horizontal sextant angle α are 45 ° ~ 60 °.
5. integrated biological denitrification waste disposal plant according to claim 1, is characterized in that oxygen-starved area and aerobic zone useful volume are than being 1:1.5-2.5.
6. integrated biological denitrification waste disposal plant according to claim 1, is characterized in that process water outlet weir plate is that oscilaltion activity is adjustable.
7. integrated biological denitrification waste disposal plant according to claim 1, is characterized in that flow apron is arranged at the bottom that communicates with aerobic zone, oxygen-starved area.
8. integrated biological denitrification waste disposal plant according to claim 7, is characterized in that flow apron and horizontal plane angle 45 ° ± 5 °.
9. integrated biological denitrification waste disposal plant according to claim arbitrary in claim 1 to 8, has grid, web plate, the permeable baffle plate of Eight characters plate under it is characterized in that top, aerobic zone liquid level.
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| CN201410394125.7A CN105461054A (en) | 2014-08-12 | 2014-08-12 | Integrated treatment plant for sewage from biological removal of nitrogen |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107892437A (en) * | 2017-11-28 | 2018-04-10 | 华夏碧水环保科技有限公司 | A kind of MBBR reaction systems of strengthened denitrification function |
| CN107963782A (en) * | 2017-11-28 | 2018-04-27 | 华夏碧水环保科技有限公司 | A kind of biological contact oxidation reaction system of strengthened denitrification function |
| CN107973402A (en) * | 2017-11-28 | 2018-05-01 | 华夏碧水环保科技有限公司 | Pulling flow type AO reactors |
| CN108249691A (en) * | 2017-11-28 | 2018-07-06 | 华夏碧水环保科技有限公司 | Integral low-energy distributing domestic sewage of villages and small towns processing system |
| CN111115988A (en) * | 2020-03-04 | 2020-05-08 | 信阳华电环保工程技术有限公司 | Household distributed domestic sewage treatment device |
| CN111533248A (en) * | 2020-04-20 | 2020-08-14 | 中麒赋能水务科技股份有限公司 | Synchronous built-in denitrification system |
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2014
- 2014-08-12 CN CN201410394125.7A patent/CN105461054A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107892437A (en) * | 2017-11-28 | 2018-04-10 | 华夏碧水环保科技有限公司 | A kind of MBBR reaction systems of strengthened denitrification function |
| CN107963782A (en) * | 2017-11-28 | 2018-04-27 | 华夏碧水环保科技有限公司 | A kind of biological contact oxidation reaction system of strengthened denitrification function |
| CN107973402A (en) * | 2017-11-28 | 2018-05-01 | 华夏碧水环保科技有限公司 | Pulling flow type AO reactors |
| CN108249691A (en) * | 2017-11-28 | 2018-07-06 | 华夏碧水环保科技有限公司 | Integral low-energy distributing domestic sewage of villages and small towns processing system |
| CN108249691B (en) * | 2017-11-28 | 2020-08-28 | 华夏碧水环保科技有限公司 | Integrated low-energy-consumption distributed village and town domestic sewage treatment system |
| CN107892437B (en) * | 2017-11-28 | 2020-09-15 | 华夏碧水环保科技有限公司 | MBBR reaction system with enhanced denitrification function |
| CN111115988A (en) * | 2020-03-04 | 2020-05-08 | 信阳华电环保工程技术有限公司 | Household distributed domestic sewage treatment device |
| CN111533248A (en) * | 2020-04-20 | 2020-08-14 | 中麒赋能水务科技股份有限公司 | Synchronous built-in denitrification system |
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Application publication date: 20160406 |