CN103043852A - Wastewater treatment process and device - Google Patents
Wastewater treatment process and device Download PDFInfo
- Publication number
- CN103043852A CN103043852A CN2012105440865A CN201210544086A CN103043852A CN 103043852 A CN103043852 A CN 103043852A CN 2012105440865 A CN2012105440865 A CN 2012105440865A CN 201210544086 A CN201210544086 A CN 201210544086A CN 103043852 A CN103043852 A CN 103043852A
- Authority
- CN
- China
- Prior art keywords
- contact oxidation
- micro
- coagulation
- nano bubble
- biological contact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Physical Water Treatments (AREA)
Abstract
The present invention provides a wastewater treatment process and a device. The process includes the following steps: preprocessing, coagulation flotation processing, biological contact oxidation processing and secondary sedimentation processing. The device includes a pretreatment device, a coagulation flotation pool, a biological contact oxidation pool and a secondary sedimentation pool, wherein the coagulation flotation pool includes a coagulation flotation separation pool body and a coagulation flotation device, and the biological contact oxidation pool is provided with a filler. The coagulation flotation process and the biological contact oxidation process are combined in the wastewater treatment process of the present invention. The characteristics of large specific surface between the micro-nano bubbles evenly diffused in water and fiber bundle-shaped filler, and good mutual contact adsorption effect are used. Therefore oxygen content in the wastewater and oxygen transfer efficiency are improved, the driving force for oxygen to transfer into biofilm and the depth penetrating into the biofilm are increased, the biofilm activity is improved, the active microbial biomass is increased, and the degradation rate of organic matters is improved.
Description
Technical field
The present invention relates to a kind of sewage treatment process and device, particularly relate to a kind of coagulation air-float and biological contact oxidation process of utilizing in conjunction with the technique and the device that carry out sewage disposal.
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 again mechanical improvement method.Mainly for separating of the suspension material in the waste water.The advantage of the method maximum 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 moisture from, 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 generally all higher, and operation is also stricter etc. with the requirement of management.And, in the pre-treatment or last handling process of chemical method, usually also need be used in conjunction with physics improvement method.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 High-efficient Water treatment process 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 larger, causes the required aeration rate of whole biological contact oxidation pond large, and energy consumption is higher; The blast aeration bubble is larger, easily impacts microbial film, can cause biofilm detachment; And oxygen skewness in water.
Summary of the invention
Based on this, be necessary the problem for prior art, a kind of new sewage treatment process and device simple in structure, easy to use are provided.
Technical scheme of the present invention is as follows:
A kind of sewage treatment process, described technique may further comprise the steps:
A: pre-treatment: need be to be processed sewage through after the pre-treatment, be driven in the coagulation floatation through lift pump; This step is removed large-sized floating matter, suspended substance and less solid matter;
B: coagulation air-float is processed: 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 processed: 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, in this step, take BOD, COD as main pollutent is removed, remove simultaneously nitrogen phosphorus;
D: secondary sedimentation is processed: the sewage overflow of processing through bio-contact oxidation directly discharges to secondary sedimentation basins process precipitation process and subsequent disposal.
Therein among 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.
Among embodiment, among the step C, described filler is half soft bat wool therein; 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
3
Among embodiment, among the step B, the residence time of described sewage in coagulation floatation is 30 to 60 minutes therein, and among the step C, the time that described sewage stops in biological contact oxidation pond is 1 to 6 hour.
Another object of the present invention is achieved through the following technical solutions:
A kind of waste disposal plant, described waste disposal plant comprises pretreatment unit, coagulation floatation, biological contact oxidation pond and secondary sedimentation basins;
Described coagulation floatation comprises coagulation air-float separate tank pond body 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 secondary sedimentation basins.
Therein among embodiment, described coagulation air-float device is micro-nano bubble generator, described micro-nano bubble generator comprises pressured air-dissolving device and micro-nano bubble releasing device, described pressured air-dissolving device and micro-nano bubble releasing device are connected, described pressured air-dissolving device comprises water inlet pipe, pressurizing device, dissolved air water tank and dissolved air water delivery line, described micro-nano bubble releasing device comprises micro-nano bubble generator, is provided with jet hole at described micro-nano bubble generator; Described pretreatment unit is connected by water inlet pipe with described dissolved air water tank, described pressurizing device is connected with described dissolved air water tank, one end of described dissolved air water delivery line is connected with described dissolved air water tank, 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 half soft bat wool, the volume of described filler account for described pond body volume 70% to 85%.
Among embodiment, the water outlet of described coagulation floatation is communicated with by the water-in of connecting pipeline with the bottom that is arranged on described biological contact oxidation pond therein.
Therein among embodiment, described air-floating apparatus 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.
Among embodiment, described coagulation floatation also is provided with gas floatation separation device therein, and described gas floatation separation device comprises slag scraper, and described slag scraper is arranged on the top of described coagulation floatation.
The invention has the beneficial effects as follows:
1 sewage treatment process of the present invention is processed coagulation air-float and the bio-contact oxidation processing combines, and at first utilizes coagulation air-float to carry out coagulating treatment, and the water after then directly will processing through coagulation air-float pass into biological contact oxidation pond; The sewage that contains micro-nano bubble after utilizing coagulation air-float to process is as the water inlet of biological contact oxidation pond, owing to containing 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 half soft fiber bundle-like filler is large, and the Contact-sorption between micro-nano bubble and the fiber bundle-like filler is effective, 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 to the microbial film inner penetration degree of depth, biomembrane activity is improved, active biomass increases, and improves organic matter degradation rate.
2 waste disposal plants of the present invention are simple in structure, reduced the aerating apparatus of biological contact oxidation pond, can reduce thus the volume of biological contact oxidation pond, reduce construction investment;
3 waste disposal plants of the present invention can be regulated by regulating micro-nano bubble generator micro-nano bubble amount and the concentration in the water inlet of biological contact oxidation pond, 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.
Description of drawings
Below in conjunction with concrete drawings and the specific embodiments, the present invention is further elaborated.
Fig. 1 is the overall schematic of an embodiment of sewage treatment process of the present invention;
Fig. 2 is the overall schematic of an embodiment of waste disposal plant of the present invention;
Fig. 3 is the overall schematic of an embodiment of the coagulation air-float device of waste disposal plant of the present invention;
Fig. 4 is the overall schematic of an embodiment of the biological contact oxidation pond of waste disposal plant of the present invention.
Embodiment
The invention provides a kind of new sewage treatment process and device, sewage treatment process of the present invention combines coagulation air-float and bio-contact oxidation processing, utilize micro-nano bubble that coagulation air-float produces to the adhewsive action of biological contact oxidation pond, save the aerating apparatus of biological contact oxidation pond, reduced the volume of biological contact oxidation pond.Below in conjunction with specific embodiment the present invention is described in further details.
Referring to Fig. 1, the invention provides a kind of sewage treatment process, this technique may further comprise the steps:
A: pre-treatment: need sewage collecting to be processed to the water collecting basin through after the pre-treatment, be driven in the coagulation floatation through lift pump; This step is removed large-sized floating matter, suspended substance and less solid matter;
B: coagulation air-float is processed: be provided with the coagulation air-float device in the coagulation floatation, sewage is carried out entering in the biological contact oxidation pond after coagulation air-float processes; In the dissolved air flotation process, the molecule that density and water approach in the removal sewage is such as part oil content, fiber etc.;
C: bio-contact oxidation is processed: be provided with filler in the described biological contact oxidation pond, the different quality object is adopted the means of taming targetedly, preferred suitable biological bacteria, add biological bacteria, biological bacteria is bred at the filling surface raised growth, form microbial film, in this step, be removed take BOD, COD as main pollutent;
D: secondary sedimentation is processed: the sewage overflow of processing through bio-contact oxidation directly discharges to secondary sedimentation basins process precipitation process and other subsequent disposal.Described other subsequent disposal can be to disinfect.
The present embodiment is processed coagulation air-float and bio-contact oxidation is processed and organically combined, and coagulation air-float is processed the oil content that can remove on the one hand in the sewage, fiber etc., processes rear 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 processed that coagulation air-float in the present embodiment is processed.So-called micro-nano bubble coagulation air-float is to make air be dissolved in water under certain pressure and reach hypersaturated state, then makes the pressure air-dissolving Shuitu so reduce to normal pressure, 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 the circulating contact that leans between microbial film, organism and the oxygen three that biological contact oxidation process is purified waste water.Little through the micro-nano bubble volume in the sewage 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, owing to having increased gas-liquid Contact area, 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 the present embodiment will be processed 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, active biomass increases, and has improved organic degradation rate.Can reduce like this aeration rate of biological contact oxidation pond, reduce aeration rate and the floor space of biological contact oxidation pond, save engineering investment cost.
Better, 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 to 7 hours.Also will carry out coagulation air-float owing to follow-up, therefore the pretreated time can be slightly short.
Better, 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 be 1 to 50 μ m wherein diameter be 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, the cumulative volume of general micro-nano bubble accounts for 1% to 20% of sewage cumulative volume, and is better, and the cumulative volume of micro-nano bubble accounts for 10% to 15% of sewage cumulative volume.
Better, as a kind of embodiment, among the step C, described filler is half 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
3Half soft bat wool light weight, intensity are high, and physics, stable chemical performance are durable in use; And half soft bat wool is three-dimensional arrangement in the water of turbulent fluctuation, can better contact with micro-nano bubble, and surface-area is large, and microbial film quantity is many, adhewsive action is strong, can fully contact with micro-nano bubble with sewage; And half soft bat wool is difficult for blocked.The clearance rate of half soft fibrous packing is large, 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 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%; The sewage that enters biological contact oxidation pond in the present embodiment enters from the bottom of biological contact oxidation pond, so the half soft bat wool of the present embodiment should be arranged in the whole biological contact oxidation pond uniformly to guarantee fully contacting of filler and micro-nano bubble.The half soft bat wool that the present invention adopts has certain intensity.The present invention is soft bat wool and the combination of micro-nano bubble partly, acting in conjunction, micro-nano bubble can improve the biomembranous biological activity on half soft bat wool surface, promote biomembranous metabolism, the area that simultaneously contacts, adsorbs between half soft bat wool and the micro-nano bubble is larger, can be with enough micro-nano bubble absorption at filling surface, prolonged the lifetime that gas ducks in drink, improved the utilization ratio of oxygen in the bubble, enough spaces are provided for again the movement of micro-nano bubble.
Better, 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 has important impact in the residence time of coagulation floatation to sewage disposal, 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 micro-nano bubble generator produces is excessively low, and the air bubble content in the sewage is low, also can affect the treatment effect of follow-up biological contact oxidation pond.Same, also there is very important impact the residence time of sewage in biological contact oxidation pond on sewage disposal; If overstand, nutritive substance exhaust the deterioration that easily causes wastewater treatment efficiency, 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 present invention 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 invention 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 in time be decomposed by microorganism, and microorganism active is stronger, and treatment effect is better.
Embodiment 1
The sewage water yield that needs to process 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 micro-nano bubble generator in the coagulation floatation, at first sewage being carried out coagulation air-float processed 30 minutes, secondly, be filled with the half 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 24 hours emptying; And then the adding biological bacteria, grow microbial film on half 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 secondary sedimentation basins; Processed 1.5 to 2 hours at secondary sedimentation basins.
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 invention, 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 half 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, other technical process are not being given unnecessary details with embodiment 1.Water-quality guideline after the processing sees Table 1.
The contrast of water quality after sewage quality and the embodiment of the invention 1 ~ 2 were processed before table 1 was processed:
| Water-quality guideline | COD(mg/L） | BOD(mg/L） | SS（mg/L） | pH | NH 3-N |
| Before the processing | 2000 | 150 | 110 | 7.5 | 60 |
| Embodiment 1 | 100 | 10 | 5 | 7 | 5 |
| Embodiment 2 | 110 | 12 | 4 | 7.1 | 5 |
As can be seen from Table 1, the water quality of utilizing sewage treatment process of the present invention to process meets national GB8978-1996 " integrated wastewater discharge standard " primary standard, and is obvious to the organism treatment effect in the sewage.
Based on same inventive concept, referring to Fig. 2 to Fig. 4, the present invention also provides a kind of waste disposal plant, and described waste disposal plant comprises pretreatment unit 1, coagulation floatation 2, biological contact oxidation pond 3 and secondary sedimentation basins 4; Described coagulation floatation 2 comprises coagulation air-float separate tank 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 is connected by lift pump 11 with described coagulation floatation 2, the water outlet of described coagulation floatation 2 is communicated with the water-in of described biological contact oxidation pond 3, and the water outlet of described biological contact oxidation pond 3 is communicated with the water-in of secondary sedimentation basins 4.The present embodiment is connected coagulation floatation with biological contact oxidation pond, the water of processing by coagulation air-float directly enters biological contact oxidation pond, micro-nano bubble after utilizing coagulation air-float to process in the sewage can be so that the organism in the sewage fully contacts with microorganism in the biological contact oxidation pond, simultaneously because the even diffusion of micro-nano bubble, so that oxygen is evenly distributed in the sewage in the biological contact oxidation pond, and micro-nano bobble rise velocity is slow, lift velocity is approximately 3 hours/meter, and micro-nano bubble volume is little, corresponding specific surface area is large, under the condition that guarantees same oxygen level, can reduce the aeration rate in the biological contact oxidation pond, saved facility investment and running cost, and so that the volume of biological contact oxidation pond reduce.Pretreatment unit in the present embodiment is grid.
Better, described waste disposal plant also comprises water collecting basin 5, described water collecting basin is used for collecting need sewage to be processed.
Better, as a kind of embodiment, described air-floating apparatus is micro-nano bubble generator, described micro-nano bubble generator comprises pressured air-dissolving device and micro-nano bubble releasing device, described pressured air-dissolving device and micro-nano bubble releasing device are connected, described pressured air-dissolving device comprises water inlet pipe 22, pressurizing device, dissolved air water tank 23 and dissolved air water delivery line 24, described micro-nano bubble releasing device comprises micro-nano bubble generator 25, is provided with jet hole at described micro-nano bubble generator 25; Described pretreatment unit 1 is connected by water inlet pipe 22 with described dissolved air water tank 23, described pressurizing device is connected with described dissolved air water tank 23, one end of described dissolved air water delivery line 24 is connected with described dissolved air water tank, 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 processed to promote when entering the dissolved air water tank, sewage generally is pressurized to 2 ~ 3 normal atmosphere, pass into a certain amount of pressurized air by pressurizing device toward dissolved air water tank 23 simultaneously, sewage gas-vapor mix with certain pressure stays for some time in the dissolved air water tank, carry out the dissolving of mixing wastewater with air and air, then the jet hole by micro-nano bubble generator discharges micro-nano bubble and makes it enter coagulation floatation, micro-nano bubble generator produces negative pressure simultaneously, in the process that these micro-nano bubbles rise with oil content, the fiber isodensity fully contacts with the small-particle that water approaches, rise to the water surface after the absorption, the formation foam also is separated, and water is separated thus.In the present embodiment, the diameter of the micro-nano bubble that produces is 1-50 μ m, the water that enters the dissolved air water tank is the water outlet after processing through waste disposal plant, the water yield that enters the dissolved air water tank accounts for whole coagulation floatation and processes 30% of the water yield, namely herein reflux ratio is 30%, and described water inlet pipe 22 is connected with the outlet pipeline of whole waste disposal plant; Described micro-nano bubble generator is spherical.
Better, as a kind of embodiment, described pressurizing device is force (forcing) pump.
Better, as a kind of embodiment, described pressurizing device is gas self-straw 26 and water level sensor 27, described gas self-straw 26 is arranged on the described water inlet pipe 22, is provided with gas at the gas self-straw and adjusts valve 261 from pipette; Described water level sensor 27 is arranged on the inside of described dissolved air water tank 23, be used for controlling gas and adjust valve 261 from pipette, make the water level in the dissolved air water tank 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 pressured air-dissolving device of the 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 tank 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 self-priming gas by gas from pipette, can be to the pressure fluid of conveying gas-liquid mixed in the water inlet pipe; Detect the pressure of dissolved air water tank with pressure transmitter and regulate with outlet valve simultaneously, the pressure in the dissolved air water tank can be adjusted to preset value, adjust valve by water level sensor control from pipette, make the water level in the dissolved air water tank remain on preset level.
Better, as a kind of embodiment, described biological contact oxidation pond 3 comprises pond body 32 and filler 31, and described filler is half 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.
Better, as a kind of embodiment, the water outlet of described coagulation floatation 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.
Better, 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 micro-nano bubble generator is separately positioned on coagulation floatation and biological contact oxidation pond, can avoids like this problem of the aeration deficiency of biological contact oxidation pond.
Better, as a kind of embodiment, described coagulation floatation 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.
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 separated with another entity or operational zone, and not necessarily requires or hint and have any relation or sequentially between these entities or the operation.And, in this patent document, term " comprises ", " comprising " or its any other variant, it is intended to contain but not exclusive inclusion, thereby so that comprise process, method, article or the equipment of 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 invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a sewage treatment process is characterized in that, described technique may further comprise the steps:
A: pre-treatment: need be to be processed sewage through after the pre-treatment, be driven in the coagulation floatation through lift pump; This step is removed large-sized floating matter, suspended substance and less solid matter;
B: coagulation air-float is processed: 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 processed: 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, in this step, take BOD, COD as main pollutent is removed, remove simultaneously nitrogen phosphorus;
D: secondary sedimentation is processed: the sewage overflow of processing through bio-contact oxidation directly discharges to secondary sedimentation basins process precipitation process and subsequent disposal.
2. sewage treatment process according to claim 1 is characterized in that, among the step C, enters in the sewage of biological contact oxidation pond and contains the good micro-nano bubble of diffustivity, and the diameter of described micro-nano bubble is 1 to 50 μ m.
3. sewage treatment process according to claim 2 is characterized in that, among the step C, described filler is half soft bat wool; 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
3
4. sewage treatment process according to claim 3 is characterized in that, among the step B, the residence time of described sewage in coagulation floatation is 30 to 60 minutes, and among the step C, the time that described sewage stops in biological contact oxidation pond is 1 to 6 hour.
5. a waste disposal plant is characterized in that, described waste disposal plant comprises pretreatment unit, coagulation floatation, biological contact oxidation pond and secondary sedimentation basins;
Described coagulation floatation comprises coagulation air-float separate tank pond body 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 secondary sedimentation basins.
6. waste disposal plant according to claim 5, it is characterized in that, described coagulation air-float device is micro-nano bubble generator, described micro-nano bubble generator comprises pressured air-dissolving device and micro-nano bubble releasing device, described pressured air-dissolving device and micro-nano bubble releasing device are connected, described pressured air-dissolving device comprises water inlet pipe, pressurizing device, dissolved air water tank and dissolved air water delivery line, described micro-nano bubble releasing device comprises micro-nano bubble generator, is provided with jet hole at described micro-nano bubble generator; Described pretreatment unit is connected by water inlet pipe with described dissolved air water tank, described pressurizing device is connected with described dissolved air water tank, one end of described dissolved air water delivery line is connected with described dissolved air water tank, 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.
7. waste disposal plant according to claim 5 is characterized in that, described biological contact oxidation pond comprises pond body and filler, and described filler is half soft bat wool, the volume of described filler account for described pond body volume 70% to 85%.
8. waste disposal plant according to claim 5 is characterized in that, the water outlet of described coagulation floatation is communicated with by the water-in of connecting pipeline with the bottom that is arranged on described biological contact oxidation pond.
9. waste disposal plant according to claim 5, it is characterized in that, described air-floating apparatus 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.
10. waste disposal plant according to claim 5 is characterized in that, described coagulation floatation also is provided with gas floatation separation device, and described gas floatation separation device comprises slag scraper, and described slag scraper is arranged on the top of described coagulation floatation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210544086.5A CN103043852B (en) | 2012-12-14 | 2012-12-14 | Wastewater treatment process and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210544086.5A CN103043852B (en) | 2012-12-14 | 2012-12-14 | Wastewater treatment process and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103043852A true CN103043852A (en) | 2013-04-17 |
| CN103043852B CN103043852B (en) | 2014-11-26 |
Family
ID=48056744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210544086.5A Active CN103043852B (en) | 2012-12-14 | 2012-12-14 | Wastewater treatment process and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103043852B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104086042A (en) * | 2014-06-20 | 2014-10-08 | 上海勘测设计研究院 | Strengthened preprocessing method for raw water of micro-polluted drinking water source |
| CN105819620A (en) * | 2016-03-30 | 2016-08-03 | 广州资源环保科技股份有限公司 | Wastewater treatment technology and device beneficial to removing black and odorous water |
| CN107311364A (en) * | 2017-08-30 | 2017-11-03 | 丹阳市百盛电器有限公司 | The plasma treatment appts and method of a kind of fruits and vegetables industry sewage |
| CN107944601A (en) * | 2017-11-07 | 2018-04-20 | 中国石油天然气集团公司 | Using characteristic contamination Source Tracing as the sewage disposal appraisal procedure and device instructed |
| CN108911003A (en) * | 2018-07-27 | 2018-11-30 | 金强 | A kind of micro-nano bubble air-float degreasing device and technique |
| CN110627325A (en) * | 2019-10-16 | 2019-12-31 | 新疆水处理工程技术研究中心有限公司 | Process method for treating food wastewater |
| CN110921992A (en) * | 2019-12-15 | 2020-03-27 | 刘彬 | Water cleaning system based on air floatation design |
| CN111204929A (en) * | 2020-01-17 | 2020-05-29 | 浙江财经大学 | Municipal sewage treatment method based on biological contact oxidation process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201264942Y (en) * | 2008-07-26 | 2009-07-01 | 崔杰 | Contact oxidation apparatus for sewage treatment |
| KR20100057236A (en) * | 2008-11-21 | 2010-05-31 | 이창한 | Floatation tank for removing algae |
| CN202152290U (en) * | 2011-07-08 | 2012-02-29 | 蓝星环境工程有限公司 | Pressurized dissolved-air floating system |
| CN203048732U (en) * | 2012-12-14 | 2013-07-10 | 蓝星环境工程有限公司 | Sewage treatment device |
-
2012
- 2012-12-14 CN CN201210544086.5A patent/CN103043852B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201264942Y (en) * | 2008-07-26 | 2009-07-01 | 崔杰 | Contact oxidation apparatus for sewage treatment |
| KR20100057236A (en) * | 2008-11-21 | 2010-05-31 | 이창한 | Floatation tank for removing algae |
| CN202152290U (en) * | 2011-07-08 | 2012-02-29 | 蓝星环境工程有限公司 | Pressurized dissolved-air floating system |
| CN203048732U (en) * | 2012-12-14 | 2013-07-10 | 蓝星环境工程有限公司 | Sewage treatment device |
Non-Patent Citations (2)
| Title |
|---|
| 《安徽农业科学》 20111010 李桂荣，刘芳莹，李雪等 混凝气浮+接触氧化法处理洗毛废水 第17379-17381页第2、3节，图1 6-10 第39卷, 第28期 * |
| 李桂荣，刘芳莹，李雪等: "混凝气浮+接触氧化法处理洗毛废水", 《安徽农业科学》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104086042A (en) * | 2014-06-20 | 2014-10-08 | 上海勘测设计研究院 | Strengthened preprocessing method for raw water of micro-polluted drinking water source |
| CN104086042B (en) * | 2014-06-20 | 2016-03-16 | 上海勘测设计研究院 | The former enhanced water pretreatment process in a kind of micro-polluted drinking water water source |
| CN105819620A (en) * | 2016-03-30 | 2016-08-03 | 广州资源环保科技股份有限公司 | Wastewater treatment technology and device beneficial to removing black and odorous water |
| CN107311364A (en) * | 2017-08-30 | 2017-11-03 | 丹阳市百盛电器有限公司 | The plasma treatment appts and method of a kind of fruits and vegetables industry sewage |
| CN107944601A (en) * | 2017-11-07 | 2018-04-20 | 中国石油天然气集团公司 | Using characteristic contamination Source Tracing as the sewage disposal appraisal procedure and device instructed |
| CN108911003A (en) * | 2018-07-27 | 2018-11-30 | 金强 | A kind of micro-nano bubble air-float degreasing device and technique |
| CN110627325A (en) * | 2019-10-16 | 2019-12-31 | 新疆水处理工程技术研究中心有限公司 | Process method for treating food wastewater |
| CN110921992A (en) * | 2019-12-15 | 2020-03-27 | 刘彬 | Water cleaning system based on air floatation design |
| CN111204929A (en) * | 2020-01-17 | 2020-05-29 | 浙江财经大学 | Municipal sewage treatment method based on biological contact oxidation process |
| CN111204929B (en) * | 2020-01-17 | 2023-04-07 | 内江师范学院 | Municipal sewage treatment method based on biological contact oxidation process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103043852B (en) | 2014-11-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103043852B (en) | Wastewater treatment process and device | |
| CN103043853B (en) | Advanced treatment process and device for sewage | |
| CN107601755B (en) | Ecological treatment method for sewage of farm | |
| CN203048659U (en) | Membrane bioreactor | |
| CN103183447A (en) | Treatment method of piggery wastewater | |
| CN102531269A (en) | Pig farm wastewater treatment method | |
| CN203048660U (en) | Biological contact oxidation pond | |
| CN110683658B (en) | Efficient biological denitrification process for sewage treatment | |
| CN101234816A (en) | Odorless aeration oxidation pond sewage treatment method | |
| CN111268804A (en) | Method for removing pollutants in tail water of sewage plant by using wetland system | |
| CN102849858A (en) | Wastewater biological treatment method for performing microbubble aeration through SPG membrane | |
| CN203048733U (en) | Advanced sewage treatment device | |
| CN210559933U (en) | Rural sewage treatment device of integration | |
| CN107473382A (en) | By controlling dissolved oxygen to realize sewage carbon nitrogen while the bioremediation removed | |
| CN204675952U (en) | The buried sewage treatment equipment that a kind of low noise sound pitch is integrated | |
| CN107162313A (en) | A kind of integral type river course high-efficiency water purifying treatment device | |
| CN203048732U (en) | Sewage treatment device | |
| CN115028267A (en) | Waste water recycling device | |
| CN202164164U (en) | Sewage treatment device for removing high-concentration ammonia nitrogen | |
| CN210796140U (en) | Domestic sewage treatment device | |
| CN201648115U (en) | Membrane bioreactor | |
| CN201458902U (en) | Combined sewage treatment device | |
| CN212050714U (en) | Improved biological contact oxidation device for sewage treatment | |
| CN211255632U (en) | Sewage treatment integration system suitable for rural area | |
| CN210528571U (en) | Biological contact oxidation process equipment using nano aeration technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190128 Address after: No. 5 Xingye Street, Beijing Economic and Technological Development Zone, 100176 Patentee after: Bluestar (Beijing) Chemical Machinery Co., Ltd. Address before: 100080 No. 62, West North Fourth Ring Road, Haidian District, Beijing Patentee before: Blue Star Environmental Engineering Co., Ltd. |