CN203048733U - Advanced sewage treatment device - Google Patents

Advanced sewage treatment device Download PDF

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Publication number
CN203048733U
CN203048733U CN 201220695263 CN201220695263U CN203048733U CN 203048733 U CN203048733 U CN 203048733U CN 201220695263 CN201220695263 CN 201220695263 CN 201220695263 U CN201220695263 U CN 201220695263U CN 203048733 U CN203048733 U CN 203048733U
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China
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water
micro
pond
nano bubble
contact oxidation
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Chinese (zh)
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马骏
王建军
郑东晟
杨昆
张学发
王晓琴
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Bluestar Beijing Chemical Machinery Co Ltd
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BLUE STAR ENVIRONMENTAL ENGINEERING Co Ltd
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Abstract

The utility model provides an advanced sewage treatment device which comprises a pretreatment device, a coagulation air flotation tank, a biological contact oxidation pond and a secondary sedimentation tank, wherein the coagulation air flotation tank comprises a coagulation air flotation separation tank body and a coagulation air flotation device; and filler is arranged in the biological contact oxidation pond. According to the advanced sewage treatment device provided by the utility model, the coagulation air flotation treatment is combined with the biological contact oxidation treatment; and based on the characteristics of uniform diffusion of micro-nano bubbles in water and large specific surface area and good mutual contact adsorption effect between fiber bundle-shaped fillers, the oxygen content and the oxygen transfer efficiency in the sewage are improved, the thrust of transferring oxygen into a biomembrane and the penetration depth in the biomembrane are increased, thus the activity of the biomembrane is enhanced, the active microorganisms are increased, and the organism degradation rate is improved.

Description

Sewage water advanced treatment apparatus
Technical field
The utility model relates to a kind of waste disposal plant, particularly relates to a kind of coagulation air-float, bio-contact oxidation and membrane filtration of utilizing in conjunction with the device that sewage is carried out advanced treatment.
Background technology
Modern sewage disposal technology is divided by processing mode, can be divided into physical treatment, chemical treatment and biological treatment.The physical treatment method is called mechanical improvement method again.Mainly for separating of the suspension material in the waste water.This method biggest advantage is simple, easy row, respond well, and very economical.Physics improvement method commonly used has: gravitational separation process, centrifugal separation, filtration method and evaporative crystallization method etc.The main processing of method of chemical treatment to as if waste water in the pollution substance of solvability or colloidality.It both can make pollutant and water sepn, also can change some pollution substance and organism etc., therefore can reach the degree of purification higher than physical method.In the time of particularly will from waste water, reclaiming useful matter, contain in the waste water perhaps that certain is poisonous, during the harmful and material that is difficult for being degraded by microorganisms, adopt the chemical harnessing method the most suitable.Yet the Chemo-Therapy logos often need adopt chemical agent or material, so working cost is operated with the requirement of management and also compared strictness etc. generally all than higher.And, in the pre-treatment or last handling process of chemical method, also need be used physics improvement method usually.Utilize the method for microbiological treatment waste water, be called biological treatment or biochemical treatment process.In the process of microbial life activity, a part of deliquescent organic substance is for the synthesis of protoplasma and the repertory of cell; A part then becomes meta-bolites, and gives off energy, and supplies with the plasmic synthetic and vital movement of microorganism, makes the microorganism ground growth and breeding that can keep, thereby makes waste water obtain purification, and biological treatment utilizes this function exactly.According to the respiratory characteristic of microorganism, be divided into aerobic, anaerobism and facultative three major types microorganism, and aerobic treatment two class bioremediations.
Biological contact oxidation process belongs to aerobic biological process for treating, it be the microbial film that is attached on the carrier (filler) be main, a kind of efficient water technology of purification of organic waste water, the biomembrance process with activated sludge process characteristics has the advantage of activated sludge process and biomembrance process concurrently.Its method is in the body of pond filler to be set, and aeration carries out oxygenation to sewage at the bottom of the pond, and makes that sewage is in flow state in the body of pond, fully contacts with filler in the sewage to guarantee sewage.Requisite oxygen is supplied with by blast aeration in the general biological contact oxidation process, but because the sludge loading in the biological contact oxidation process is bigger, causes the required aeration rate of whole biological contact oxidation pond big, and energy consumption is higher; The blast aeration bubble is bigger, easily impacts microbial film, can cause biofilm detachment; And oxygen skewness in water.
The utility model content
Based on this, be necessary at prior art problems, a kind of new sewage water advanced treatment apparatus simple in structure, easy to use is provided.
The technical solution of the utility model is as follows:
A kind of sewage water advanced treatment apparatus, described sewage water advanced treatment apparatus comprise pretreatment unit, coagulation floatation, biological contact oxidation pond and membrane sepn pond;
Described coagulation floatation comprises dissolved air flotation pond and coagulation air-float device, be provided with filler in the described biological contact oxidation pond, described pretreatment unit is connected by lift pump with described coagulation floatation, the water outlet of described coagulation floatation is communicated with the water-in of described biological contact oxidation pond, and the water outlet of described biological contact oxidation pond is communicated with the water-in of membrane sepn Chi Chi; Concentrated water discharge mouth in the described membrane sepn pond is connected with the water-in of described biological contact oxidation pond.
Therein among embodiment, described coagulation air-float device is micro-nano bubble generator, described micro-nano bubble generator comprises pressure air-dissolving device and micro-nano bubble releasing device, described pressure air-dissolving device and micro-nano bubble releasing device are connected, described pressure air-dissolving device comprises water inlet pipe, pressurizing device, dissolved air water jar and dissolved air water delivery line, described micro-nano bubble releasing device comprises micro-nano bubble generator, and described micro-nano bubble generator is provided with jet hole; Described pretreatment unit is connected by water inlet pipe with described dissolved air water jar, described pressurizing device is connected with described dissolved air water jar, one end of described dissolved air water delivery line is connected with described dissolved air water jar, the other end of described dissolved air water delivery line is connected with described micro-nano bubble generator, and described micro-nano bubble generator is arranged on the bottom of described coagulation floatation body.
Among embodiment, described biological contact oxidation pond comprises pond body and filler therein, and described filler is the medium-soft bat wool, the volume of described filler account for described pond body volume 70% to 85%.
Therein among embodiment, described coagulation air-float device arranges 2 micro-nano bubble releasing devices, one of them micro-nano bubble releasing device is arranged in the described coagulation floatation, and another micro-nano bubble releasing device is arranged on the bottom of described biological contact oxidation pond.
Therein among embodiment, described membrane sepn pond is immerseable, the membrane sepn pond of described immerseable comprises hyperfiltration membrane assembly and aerating apparatus, bottom or described membrane sepn pond that described aerating apparatus is arranged on described membrane sepn pond are separate type, the membrane sepn pond of described separate type comprises membrane module and back flushing assembly, and described back flushing assembly links to each other with described hyperfiltration membrane assembly.
The beneficial effects of the utility model are:
The technology that 1 sewage water advanced treatment apparatus of the present utility model adopts is handled coagulation air-float and the bio-contact oxidation processing combines, at first utilize coagulation air-float to carry out coagulating treatment, the water after directly will handling through coagulation air-float then feeds biological contact oxidation pond; The sewage that contains micro-nano bubble after utilizing coagulation air-float to handle is as the water inlet of biological contact oxidation pond, owing to contain micro-nano bubble through the sewage after the coagulation air-float processing, and micro-nano gas ducks in drink and can evenly spread, and the specific surface area of fiber bundle-like filler is big, and contact advantages of good adsorption effect between micro-nano bubble and the fiber bundle-like filler, thereby micro-nano bubble is good to the adhesion effect of filler, can improve oxygen amount in the sewage and the transfer efficiency of oxygen, increase impellent that oxygen shifts in the microbial film and depth of penetration in the microbial film, biomembrane activity is improved, the living microorganism amount increases, and improves organic matter degradation rate.
2 sewage water advanced treatment apparatus of the present utility model are simple in structure, saved the aerating apparatus of biological contact oxidation pond, can reduce the volume of biological contact oxidation pond thus, reduce construction investment;
3 sewage water advanced treatment apparatus of the present utility model can be regulated micro-nano bubble amount and concentration in the water inlet of biological contact oxidation pond by regulating micro-nano bubble generator, and then can make the interior variation that keeps higher dissolved oxygen concentration to adapt to water quality, the water yield of biological contact oxidation pond, suitability is wide;
4 the utility model adopt the water outlet behind the membrane filtration can directly be used as tap water, and sewage water advanced treatment apparatus of the present utility model occupation of land is little, and cost is low.
Description of drawings
Below in conjunction with concrete drawings and the specific embodiments, the utility model is further elaborated.
Fig. 1 is the overall schematic of an embodiment of the employed technology of sewage water advanced treatment apparatus of the present utility model;
Fig. 2 is the overall schematic of an embodiment of sewage water advanced treatment apparatus of the present utility model;
Fig. 3 is the overall schematic of an embodiment of the coagulation air-float device of sewage water advanced treatment apparatus of the present utility model;
Fig. 4 is the overall schematic of an embodiment of the biological contact oxidation pond of sewage water advanced treatment apparatus of the present utility model.
Embodiment
The utility model provides a kind of new sewage water advanced treatment apparatus, sewerage advanced treatment process of the present utility model is handled by coagulation air-float, bio-contact oxidation and membrane filtration combines, utilize micro-nano bubble that coagulation air-float produces to the adhewsive action of biological contact oxidation pond, saved the aerating apparatus of biological contact oxidation pond, reduce the volume of biological contact oxidation pond, adopted film as filtration unit simultaneously.Below in conjunction with specific embodiment the utility model is described in further details.
Referring to Fig. 1, the employed technology of sewage water advanced treatment apparatus of the present utility model may further comprise the steps:
A: pre-treatment: the sewage that will need to handle is driven in the coagulation floatation through lift pump through after the pre-treatment; This step is removed large-sized floating matter, suspended substance and less solid matter;
B: coagulation air-float is handled: be provided with the coagulation air-float device in the coagulation floatation, sewage is carried out the coagulation air-float separating treatment after, enter in the biological contact oxidation pond; In the dissolved air flotation process, the molecule that the density in the removal sewage and water approach;
C: bio-contact oxidation is handled: be provided with filler in the described biological contact oxidation pond, the different quality object is adopted the means of taming targetedly, select suitable biological bacteria, biological bacteria is bred at the filling surface raised growth, form microbial film, pollutent based on BOD, COD in this step is removed, and removes nitrogen phosphorus simultaneously;
D: membrane filtration is handled: the sewage overflow of handling through bio-contact oxidation directly uses through membrane filtration processing back to the membrane sepn pond, and the concentrate recirculation behind the membrane filtration is to biological contact oxidation pond.
Present embodiment with coagulation air-float handle, bio-contact oxidation is handled and membrane filtration organically combines, coagulation air-float is handled the oil content that can remove on the one hand in the sewage, fiber etc., handles back sewage by coagulation air-float on the other hand and contains a large amount of micro-nano bubbles.And micro-nano bubble has good adhewsive action to filler.It is that micro-nano bubble coagulation air-float is handled that coagulation air-float in the present embodiment is handled.So-called micro-nano bubble coagulation air-float is to make air be dissolved in water under certain pressure and reach hypersaturated state, makes the pressure air-dissolving Shuitu so reduce to normal pressure then, and the air that at this moment is dissolved in the water is overflowed from water with the form of micro-nano bubble.
It mainly is by the contact of the circulation between microbial film, organism and the oxygen three that biological contact oxidation process is purified waste water.Little through the micro-nano bubble volume after the coagulation air-float processing, quantity is many, and good dispersity easily evenly spreads with water body, and the lifetime in water is long.After the sewage that contains micro-nano bubble enters contact-oxidation pool, at first, contact area between gas-liquid owing to increased, can improve the oxygen transfer efficiency, can guarantee has sufficient dissolved oxygen in the water body, and reduces aeration rate.And because laterally evenly diffusion of micro-nano bubble, in mobile process, oxygen in the sewage is evenly distributed, contained oxygen can fully contact with microbial film with organism in the micro-nano bubble simultaneously, moreover the surface of micro-nano bubble can the enrichment electric charge, improve biomembranous activity, improved biomembranous vigor and oxidation capacity.Sewage after present embodiment will be handled through coagulation air-float is directly as the water inlet of biological contact oxidation pond, utilize micro-nano bubble to the adhewsive action of filler, improved the oxygen amount in the sewage, improved the transfer efficiency of dirty water oxygen, increase impellent that oxygen shifts in the microbial film and the depth of penetration in the microbial film, make biomembranous active the raising, the living microorganism amount increases, and has improved organic degradation rate.Can reduce the aerating apparatus of biological contact oxidation pond like this, reduce the floor space of biological contact oxidation pond, save engineering investment cost.
Coagulation air-float device in the present embodiment mainly is to make the gas-liquid mixture fluid high speed rotating under pressure that enters the coagulation air-float device, when the liquids and gases of high speed rotating spray from jet orifice at suitable pressures, because speed of rotation and the gas-liquid density of superelevation of gas-liquid is mixed than the effect that multiplies each other on the mechanics of (1:1000) by the spout place, between the gas-to-liquid contact interface, produce powerful at a high speed shearing and high-frequency pressure variation, form artificial extreme condition, under this condition, generate a large amount of microns, has the polymerizable molecular of smashing group in the time of nano grade air bubbles, form the effect of subset active water, and the ionization of small portion water molecules can be decomposed, can in micro-nano bubble space, produce active oxygen, oxonium ion, radical ion such as hydrogen ion and hydroxide ion, especially hydroxyl free radical has the reduction potential of superelevation, have superpower oxidation effectiveness and can decompose and also be difficult to the pollutent that decomposes in the eutrophication water under the normal condition, realize the purification of water quality.The dissolution rate that micro-nano gas ducks in drink surpasses 85%, dissolved oxygen concentration can reach more than the 10mg/l, and micro-nano bubble is that the mode with bubble remains in the water for a long time, its lift velocity is approximately 3 hours/meter, can constantly in water, replenish active oxygen along with the consumption of dissolved oxygen, for the microorganism of handling water pollutant, absorption nutritive substance provides sufficient active oxygen, strong oxidizing property ionic group, and guaranteed the reaction times of active oxygen abundance.Micro-nano bobble rise velocity is slow, and in the water body of most micro-nano bubble around in uphill process, being dissolved into and can not resemble and rise to the water surface millimeter, the centimetre-sized bubble.
The utility model adopts membrane filtration to replace traditional secondary sedimentation basins, can directly drink through the water behind the membrane filtration, the existence of micro-nano bubble can improve the oxygen transfer efficiency, can improve mean concns, the dissolved oxygen concentration of mud, and can shorten the treatment time, reduce sludge back flow quantity, further, under micro-nano influence of air bubbles, the microorganism that biological contact oxidation pond produces is not easy to stick on the film surface, can reduce film and pollute.
Preferable, as a kind of embodiment, in the steps A, adopt grid device to carry out pre-treatment.The pretreated time of grid device is 5 ~ 7 hours.Also will carry out coagulation air-float owing to follow-up, therefore the pretreated time can be short slightly.
Preferable, as a kind of embodiment, among the step C, enter in the sewage of biological contact oxidation pond and contain the good micro-nano bubble of diffustivity, the diameter of described micro-nano bubble is 1 to 50 μ m; Wherein diameter is that 1 to 20 μ m accounts for more than 50% of all micro-nano bubbles.Can improve biological activity like this, thereby be conducive to the metabolism of microorganism.
Preferable, as a kind of embodiment, among the step C, described filler is the medium-soft bat wool, utilizes the adsorption between micro-nano bubble and bat wool, improves oxygen utilization efficient, reduces the oxygen usage quantity.The volume of described filler account for described biological contact oxidation pond volume 70% to 85%, the biofilm amount of described filler is 220kg/m 3To 380kg/m 3Medium-soft bat wool light weight, intensity height, physics, stable chemical performance are durable in use; And the medium-soft bat wool is three-dimensional arrangement in the water of turbulent fluctuation, can better contact with micro-nano bubble, and surface-area is big, and microbial film quantity is many, adhewsive action is strong, can fully contact with micro-nano bubble with sewage; And the medium-soft bat wool is difficult for blocked.The clearance rate of medium-soft fibrous packing is big, is conducive to the rising of micro-nano bubble, and the interface that also is conducive to simultaneously between microbial film and sewage is upgraded.Adopt the filler of fibrous bundle in sewage treatment process, to produce sludge quantity seldom, with low cost.The biomass of above-mentioned filler biofilm can form thick and closely knit microbial film at the filler of biological contact oxidation pond.The volume of described filler account for whole biological contact oxidation pond volume 70% to 85%; Because biological contact oxidation pond of the present utility model has saved aerating apparatus, do not need to reserve enough aeration spaces in the biological contact oxidation pond, and the sewage that enters biological contact oxidation pond enters from the bottom of biological contact oxidation pond, so the medium-soft bat wool of present embodiment should be arranged in the whole biological contact oxidation pond uniformly to guarantee fully contacting of filler and micro-nano bubble.The medium-soft bat wool that the utility model adopts has certain intensity.The utility model organically combines medium-soft bat wool and micro-nano bubble, acting in conjunction, micro-nano bubble can improve the biomembranous biological activity on medium-soft bat wool surface, promote biomembranous metabolism, the bat wool of medium-soft simultaneously provides enough spaces for again the movement of micro-nano bubble.
Preferable, as a kind of embodiment, among the step B, the time that described sewage stops in coagulation floatation is 30 to 60 minutes, among the step C, the time that described sewage stops in biological contact oxidation pond is 1 to 6 hour.Sewage residence time of coagulation floatation to the sewage disposal important influence, if overstand, then the bubbles volume of air supporting generation can reduce and then have influence on the treatment effect of follow-up biological contact oxidation pond, if the residence time is too short, the poor effect of coagulation air-float then, the bubble that same air-dissolving air-float produces is low excessively, and the air bubble content in the sewage is low, also can influence the treatment effect of follow-up biological contact oxidation pond.Same, also there is very significant effects the residence time of sewage in biological contact oxidation pond to sewage disposal; If overstand, nutritive substance exhaust the deterioration that causes wastewater treatment efficiency easily, if the residence time is too short, pollution substance also is not able to do in time to be absorbed by the mushroom microorganism, can cause process result degrades equally.The utility model stopped sewage 30 to 60 minutes in coagulation floatation, namely by the oil content in the coagulation air-float removal sewage, fiber etc., the micro-nano air bubble content in the sewage is moderate simultaneously for sewage at this moment; Sewage of the present utility model stopped in biological contact oxidation pond 1 to 6 hour, and the nutritive ingredient in the sewage can satisfy the microbial growth demand, and the organic substance in the sewage can be in time by microbiological degradation, and microorganism active is stronger, and treatment effect is better.
Preferable, as a kind of embodiment, among the step D, what described membrane filtration adopted is hyperfiltration membrane assembly, and the membrane flux when described ultra-filtration membrane is immerseable is 10 to 15L/m 2H, the membrane flux when described ultra-filtration membrane is separate type are 50 to 60L/m 2H; The aeration rate in described membrane sepn pond is 3 to 5m 3/ m 2H.
Embodiment 1
The sewage water yield that needs to handle is 300 tons/day, and the water quality of sewage is as shown in table 1, and above-mentioned sewage collecting to water collecting basin,, is driven in the coagulation floatation through sewage pump after 5 hours through the grid pre-treatment;
Be provided with dissolved air flotation device in the coagulation floatation, by air-dissolving air-float sewage being carried out coagulation air-float handles, wherein, be filled with the medium-soft bat wool that accounts for whole biological contact oxidation pond volumetric spaces 85% in the biological contact oxidation pond, biological bacteria is joined in the biological contact oxidation pond, add sewage and fill, leave standstill emptying in 24 hours; And then the adding biological bacteria, grow microbial film on medium-soft bat wool surface this moment.The biomass that utilizes biofilm for the biological bacteria of 380kg/m3 to the sewage disposal in the biological contact oxidation pond after 3 hours, overflow is to the membrane sepn pond; The membrane flux of described ultra-filtration membrane is 10L/m 2H, the aeration rate in described membrane sepn pond is 3m 3/ m 2H.
In the present embodiment, the volume of water collecting basin is 1000 cubic metres, and the volume of coagulation coagulation floatation is 100 cubic metres, and the volume of biological contact oxidation pond is 200 cubic metres, and the volume of secondary sedimentation basins is 100 cubic metres.Be the 300-400 cubic meter and adopt the volume of at present general design biological contact oxidation pond, therefore, adopt sewage treatment process of the present utility model, can reduce the volume of biological contact oxidation pond, reduce construction investment.
Embodiment 2
The sewage pretreatment time is 7 hours, the coagulation air-float treatment time is 60 minutes, be filled with the medium-soft bat wool that accounts for whole biological contact oxidation pond volumetric spaces 70% in the biological contact oxidation pond, the biomass of biological bacteria biofilm is 220kg/m3, the treatment time of biological contact oxidation pond is 6 hours, and the membrane flux of described ultra-filtration membrane is 15L/m 2H, the aeration rate in described membrane sepn pond is 5m 3/ m 2H, other technical process are not being given unnecessary details with embodiment 1.Water-quality guideline after the processing sees Table 1.
Sewage quality and the utility model embodiment 1 ~ 2 handled the contrast of back water quality before table 1 was handled:
Water-quality guideline COD(mg/L?) SS(mg/L) pH NH 3-N
Before the processing 800 35 7.5 60
Embodiment 1 2.5 0.03 7 0.4
Embodiment 2 2.4 0.03 7.1 0.4
As can be seen from Table 1, the water quality of utilizing sewage treatment process of the present utility model to handle meets national GB5749-2006 " drinking water sanitary standard ", and is obvious to the organism treatment effect in the sewage.
Based on the foregoing invention design, referring to Fig. 2 to Fig. 4, the utility model provides a kind of sewage water advanced treatment apparatus, and described sewage water advanced treatment apparatus comprises pretreatment unit 1, coagulation floatation 2, biological contact oxidation pond 3 and membrane sepn pond 4; Described coagulation floatation 2 comprises coagulation floatation pond body 21 and coagulation air-float device, be provided with filler 31 in the described biological contact oxidation pond 3, described pretreatment unit 1 and described coagulation floatation 2 are connected by lift pump, the water outlet of described coagulation floatation 2 is communicated with the water-in of described biological contact oxidation pond 3, the water outlet of described biological contact oxidation pond 3 is communicated with the water-in in pond, membrane sepn pond 4, and the concentrated water discharge mouth in the described membrane sepn pond 4 is connected with the water-in of described biological contact oxidation pond 3.Present embodiment is connected coagulation floatation with biological contact oxidation pond, the water of handling by coagulation air-float directly enters biological contact oxidation pond, the micro-nano bubble that utilizes coagulation air-float to handle in the sewage of back can be so that the organism in the sewage fully contacts with microorganism in the biological contact oxidation pond, simultaneously micro-nano bubble rises and makes the sewage in the biological contact oxidation pond fully stir, reduced the aerating apparatus in the biological contact oxidation pond, save facility investment and working cost, made the volume of biological contact oxidation pond reduce.Pretreatment unit in the present embodiment is grid.
Preferable, described sewage water advanced treatment apparatus also comprises water collecting basin 5, described water collecting basin is used for collecting the sewage that needs processing.
Preferable, as a kind of embodiment, described coagulation air-float device is micro-nano bubble generator, described micro-nano bubble generator comprises pressure air-dissolving device and micro-nano bubble releasing device, described pressure air-dissolving device and micro-nano bubble releasing device are connected, described pressure air-dissolving device comprises water inlet pipe 22, pressurizing device, dissolved air water jar 23 and dissolved air water delivery line 24, described micro-nano bubble releasing device comprises micro-nano bubble generator 25, and described micro-nano bubble generator 25 is provided with jet hole; Described pretreatment unit 1 is connected by water inlet pipe 22 with described dissolved air water jar 23, described pressurizing device is connected with described dissolved air water jar 23, one end of described dissolved air water delivery line 24 is connected with described dissolved air water jar, the other end of described dissolved air water delivery line 24 is connected with described micro-nano bubble generator 25, and described micro-nano bubble generator 25 is arranged on the bottom of described coagulation floatation body 21.Coagulation air-float treatment scheme in the present embodiment is to be raised pump through the sewage that pretreatment unit is handled to promote when entering the dissolved air water jar, sewage generally is pressurized to 3 ~ 4 normal atmosphere, feed a certain amount of pressurized air by pressurizing device toward dissolved air water jar 23 simultaneously, sewage gas-vapor mix with certain pressure stays for some time in the dissolved air water jar, carry out the dissolving of air water mixing and air, jet hole by micro-nano bubble generator discharges micro-nano bubble and makes it enter coagulation floatation then, micro-nano bubble generator produces negative pressure simultaneously, isolate foam in the process that these micro-nano bubbles rise, water is separated thus.In the present embodiment, the diameter of the micro-nano bubble that produces is 1 to 50 μ m, the water that enters the dissolved air water jar is the water outlet after handling through sewage water advanced treatment apparatus, the water yield that enters the dissolved air water jar accounts for whole coagulation floatation and handles 30% of the water yield, namely reflux ratio herein is 30%, and described water inlet pipe 22 is connected with the outlet pipeline of entire sewage advanced treatment apparatus; Described micro-nano bubble generator is spherical.
Preferable, as a kind of embodiment, described pressurizing device is force (forcing) pump.
Preferable, as a kind of embodiment, described pressurizing device is gas self-straw 26 and water level sensor 27, and described gas self-straw 26 is arranged on the described water inlet pipe 22, and the gas self-straw is provided with gas self-priming amount and adjusts valve 261; Described water level sensor 27 is arranged on the inside of described dissolved air water jar 23, be used for controlling gas self-priming amount and adjust valve 261, make the water level in the dissolved air water jar 23 keep preset level, and the gas dissolving water of acquisition preset concentration, and then micro-nano bubble amount and concentration in the water inlet of adjusting biological contact oxidation pond.
More excellent, the pressure air-dissolving device of present embodiment also comprises pressure transmitter 28 and outlet valve 29, pressure transmitter 28 and outlet valve 29 are arranged on the dissolved air water delivery line 24, and near dissolved air water jar 23.In the present embodiment, by lift pump 11 sewage is sucked from pretreatment unit, the gas self-straw is negative pressure, thereby adjusts valve from air absorbing body by gas self-priming amount, can be to the pressure fluid of conveying gas-liquid mixed in the water inlet pipe; Detect the pressure of dissolved air water jar with pressure transmitter and regulate with outlet valve simultaneously, the pressure in the dissolved air water jar can be adjusted to preset value, adjust valve by water level sensor control self-priming amount, make the water level in the dissolved air water jar remain on preset level.
Preferable, as a kind of embodiment, described biological contact oxidation pond 3 comprises pond body 32 and filler 31, and described filler is the medium-soft bat wool, the volume of described filler 31 account for described pond body 32 volume 70% to 85%, be provided with shore pipe in the bottom of described pond body.
Preferable, as a kind of embodiment, the water outlet of described coagulation floatation 2 is communicated with by the water-in of connecting pipeline with the bottom that is arranged on described biological contact oxidation pond.This is for micro-nano bubble is stirred more fully to the sewage in the biological contact oxidation pond.
Preferable, as a kind of embodiment, described air-floating apparatus arranges 2 micro-nano bubble releasing devices, and one of them micro-nano bubble generator 25 is arranged in the described coagulation floatation, and another micro-nano bubble generator 33 is arranged on the bottom of described biological contact oxidation pond.In the present embodiment, the micro-nano bubble releasing device of air-floating apparatus is separately positioned on coagulation floatation and biological contact oxidation pond, can avoids the problem of the aeration deficiency of biological contact oxidation pond like this.
Preferable, as a kind of embodiment, described coagulation floatation 2 also is provided with gas floatation separation device, and described gas floatation separation device comprises slag scraper 201, and described slag scraper is arranged on the top of described coagulation floatation.Described gas floatation separation device is for the treatment of the scum silica frost that swims in sewage level.
Preferable, as a kind of embodiment, described membrane sepn pond is immerseable, the membrane sepn pond of described immerseable comprises hyperfiltration membrane assembly and aerating apparatus, bottom or described membrane sepn pond that described aerating apparatus is arranged on described membrane sepn pond are separate type, the membrane sepn pond of described separate type comprises membrane module and back flushing assembly, and described back flushing assembly links to each other with described hyperfiltration membrane assembly.Hyperfiltration membrane assembly in the present embodiment, aerating apparatus and back flushing assembly are prior art, and the utility model repeats no more.
At last, need to prove, in this patent document, the relational terms such as first, second grade only is used for an entity or operation are made a distinction with another entity or operation, and not necessarily requires or hint and have any relation or in proper order between these entities or the operation.And, in this patent document, term " comprises ", " comprising " or its any other variant, it is intended to contain and nonexcludability comprises, thereby make process, method, article or the equipment that comprises a series of key elements, not only comprise these key elements, but also comprise and clearly not listing and other key elements that those skilled in the art can know, perhaps also be included as the known requisite key element of these processes, method, article or equipment.
The above embodiment has only expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.

Claims (5)

1. a sewage water advanced treatment apparatus is characterized in that, described sewage water advanced treatment apparatus comprises pretreatment unit, coagulation floatation, biological contact oxidation pond and membrane sepn pond;
Described coagulation floatation comprises dissolved air flotation pond and coagulation air-float device, be provided with filler in the described biological contact oxidation pond, described pretreatment unit is connected by lift pump with described coagulation floatation, the water outlet of described coagulation floatation is communicated with the water-in of described biological contact oxidation pond, and the water outlet of described biological contact oxidation pond is communicated with the water-in of membrane sepn Chi Chi; Concentrated water discharge mouth in the described membrane sepn pond is connected with the water-in of described biological contact oxidation pond.
2. sewage water advanced treatment apparatus according to claim 1, it is characterized in that, described coagulation air-float device is micro-nano bubble generator, described micro-nano bubble generator comprises pressure air-dissolving device and micro-nano bubble releasing device, described pressure air-dissolving device and micro-nano bubble releasing device are connected, described pressure air-dissolving device comprises water inlet pipe, pressurizing device, dissolved air water jar and dissolved air water delivery line, described micro-nano bubble releasing device comprises micro-nano bubble generator, and described micro-nano bubble generator is provided with jet hole; Described pretreatment unit is connected by water inlet pipe with described dissolved air water jar, described pressurizing device is connected with described dissolved air water jar, one end of described dissolved air water delivery line is connected with described dissolved air water jar, the other end of described dissolved air water delivery line is connected with described micro-nano bubble generator, and described micro-nano bubble generator is arranged on the bottom of described coagulation floatation body.
3. sewage water advanced treatment apparatus according to claim 2 is characterized in that, described biological contact oxidation pond comprises pond body and filler, and described filler is the medium-soft bat wool, the volume of described filler account for described pond body volume 70% to 85%.
4. sewage water advanced treatment apparatus according to claim 1, it is characterized in that, described coagulation air-float device arranges 2 micro-nano bubble releasing devices, one of them micro-nano bubble releasing device is arranged in the described coagulation floatation, and another micro-nano bubble releasing device is arranged on the bottom of described biological contact oxidation pond.
5. sewage water advanced treatment apparatus according to claim 1, it is characterized in that, described membrane sepn pond is immerseable, the membrane sepn pond of described immerseable comprises hyperfiltration membrane assembly and aerating apparatus, bottom or described membrane sepn pond that described aerating apparatus is arranged on described membrane sepn pond are separate type, the membrane sepn pond of described separate type comprises membrane module and back flushing assembly, and described back flushing assembly links to each other with described hyperfiltration membrane assembly.
CN 201220695263 2012-12-14 2012-12-14 Advanced sewage treatment device Expired - Lifetime CN203048733U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103043853A (en) * 2012-12-14 2013-04-17 蓝星环境工程有限公司 Advanced treatment process and device for sewage
CN104030530A (en) * 2014-06-20 2014-09-10 上海勘测设计研究院 Enhanced pretreatment device for micro-polluted raw drinking source water
CN113754187A (en) * 2021-09-03 2021-12-07 石横特钢集团有限公司 Advanced treatment and recycling process for wastewater of iron and steel enterprises

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103043853A (en) * 2012-12-14 2013-04-17 蓝星环境工程有限公司 Advanced treatment process and device for sewage
CN104030530A (en) * 2014-06-20 2014-09-10 上海勘测设计研究院 Enhanced pretreatment device for micro-polluted raw drinking source water
CN113754187A (en) * 2021-09-03 2021-12-07 石横特钢集团有限公司 Advanced treatment and recycling process for wastewater of iron and steel enterprises

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