CN1018617B - Bio-chemical fluidized bed with floating granules - Google Patents
Bio-chemical fluidized bed with floating granulesInfo
- Publication number
- CN1018617B CN1018617B CN87101071A CN87101071A CN1018617B CN 1018617 B CN1018617 B CN 1018617B CN 87101071 A CN87101071 A CN 87101071A CN 87101071 A CN87101071 A CN 87101071A CN 1018617 B CN1018617 B CN 1018617B
- Authority
- CN
- China
- Prior art keywords
- container
- fluidized bed
- oxygen
- fluidized
- gas distributor
- 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.)
- Expired
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Biological Treatment Of Waste Water (AREA)
Abstract
The present invention discloses a waste water treatment device with a biochemical fluidized bed, which uses floating substances as biological film carriers. The device uses a hollow plastic short pipe as a fluidized medium with specific gravity slightly smaller than that of treatment liquid, wherein the pipe diameter range of a single ring hollow short pipe (which is a single ring or multiple rings combined by a plurality of single rings) is from 3 to 10mm; the cross section can form a circle, or a triangle or a polygon; the internal surface and the external surface are rough so that microorganisms can grow on films. During operation, the treatment liquid passes through the fluidized bed device from bottom to top, and the air is led at the bottom of the device in order to perform pneumatic fluidization. The device has the advantages of high efficiency, energy saving, simple device, convenient operation management and wide application range.
Description
What the present invention relates to is a kind of wastewater biochemical treatment unit, and particularly a kind of is the bio-chemical fluidized bed wastewater treatment equipment of biofilm carrier with floating plastic tubulature.
Worldwide; the biochemical treatment of waste water is at present still based on activated sludge process; but; it is big that this method exists floor space; the initial cost height, processing efficiency is low, the shortcoming that running management complexity etc. is difficult to overcome; become trade effluent and municipal sewage plant's pace of construction is slow, do not catch up with the major cause that environment protection and urban construction need.
Method of wastewater treatment and device (USP3,846,289 of people such as Jeris.J.S development, USP3,956,129, USP4,009,098, USP4,009,105, award the U.S. Ecolotrol company that gives) what relate to is a kind of bio-chemical fluidized bed waste water treatment process, the comparable activated sludge process of its efficient improves an order of magnitude, its major technique feature is in the container of a vertical processing waste water, treatment solution is bottom-up to be loaded with biomembranous particle fluidized bed layer by one, and carrier particle uses yellow ground mostly, and its proportion is greater than processed liquid, with the certain flow rate flowing fluid that makes progress particle is taken up, make the bed expansion fluidisation, after particle rose to certain altitude, flow velocity slowed down, particle is because of its gravity sedimentation, and taken up by rising liquid stream, so go round and begin again, thereby form fluidized-bed.The very little carrier of particle diameter for the microbial film that adheres to provide one huge, constantly the surface of motion by the biochemical treatment of microorganism, makes waste water obtain handling.U.S. Ecolotrol company in the seventies later stage with this method be used for waste water two, tertiary treatment, be referred to as the bio-chemical fluidized bed technology of Hy-Flo.This method has the efficient height, takes up an area of to lack, and advantages such as reduced investment, but consumed energy is bigger, and a large amount of can be used in the backflow that makes carrier particle fluidisation and liquid.Though,, therefore hindered this method in industrial applying not obtaining remarkable break-throughs over year surplus in the of ten in the reduction power consumption through effort.
In addition, above-mentioned fluidized-bed is when operate continuously, because microbial growth, its accompanying carrier particle can constantly increase, when serious even form agglomerate, as not controlling, will reduce the biomembrane area of unit volume, cause the efficient of fluidized-bed to reduce, for this reason, need set up special device that carrier particle is carried out demoulding, and make the particle after the demoulding return fluidizer (USP4,177,144, USP4,250,033), like this, not only make fluidizer be tending towards complicated, but also increased the complexity of operation.
Activated sludge process was come out from 1914, and (1987) existing 73 years history is never being sought a kind of energy-efficient new method of wastewater treatment therebetween discontinuously so far, does not achieve one's goal eventually so far.The invention provides a kind of improved bio-chemical fluidized bed device, it still is slightly less than processed tintometric floating granules as fluidizing medium after adopting and being loaded with microbial film, has reached energy-efficient purpose.
Device of the present invention is by rectilinear container, water inlet pipe, and inlet pipe is equipped with the liquid outlet tube of filter screen, gas distributor, floating granules layer and spoil disposal evacuated tube are formed.Rectilinear container can be circle, square, rectangle, Polygons or other geometric cross section.
The used floating granules of the present invention is the hollow open plastic tubulature, it is to constitute by monocycle or by many rings short tube of some monocycles combination, the monocycle diameter is 3～10mm, be preferably 4～6mm, cross section can be circle, trilateral or Polygons, surfaces externally and internally is coarse and have striped, grows in order to microorganism colonization.This short tube carries the proportion that proportion behind the microbial film still is slightly less than processed liquid, and the approaching more processed liquid specific gravity of proportion that is loaded with the hollow open short tube behind the microbial film is good more, and proportion is approaching more, and easy more fluidisation and fluidisation are even more, and it is low more to consume energy.All plastics that finished product are achieved the above object all can be used as raw material and make above-mentioned hollow open short tube.
When liquid in containers remained static, medium swam in liquid upper, basically by the submergence of liquid institute.When device operation operation, processed waste water constantly enters from the container bottom, air is then sentenced certain speed near container bottom and is imported through gas distributor under the waterwater entrance pipe, carrying out strength stirs, floating granules is subjected to the stirring from solution-airmixture, stirs up and down, with a spot of air, do not need other condition just can reach the purpose of uniform fluid, form the gas, liquid, solid three-phase fluidized bed.Gas distributor can be claw type aeration head, turbulent flow type aerator, perforated pipe, porous ceramics or other air blast oxygenate apparatus.Gas distribution intensity through gas distributor is principle to help biofilm development, but best gas distribution intensity is not a fixed, and unalterable numerical value will be subjected to the combined influence of the length-to-diameter ratio, water quality, gas distribution mode etc. of filler caliber, filler.Gas through gas distributor institute cloth has the filler of making fluidisation and two kinds of effects of oxygenation, and its oxygenation capacity generally can not satisfy the demand of bio-chemical fluidized bed high speed oxygen-consumption when water concentration is high slightly, and the oxygen supply insufficient section adopts other supplemental oxygen device to provide outside container.The supplemental oxygen device can adopt ejector to spray (supplying gas from air-breathing or low pressure) oxygenation, also can adopt claw type aeration head, turbulent flow type aerator, perforated pipe, porous ceramics or other air blast oxygenate apparatus.The outer supplemental oxygen device of container can also can carry out oxygenation to phegma to the direct oxygenation of processed waste water, and the liquid after the oxygenation flows in the container and handles.
It is oxygen source that gas distributor of the present invention and additional oxygenate apparatus adopt air, and the Hy-Flo biological fluidized bed is oxygen source with the pure oxygen, needs the device and the technology of a whole set of manufacturing pure oxygen this moment; Need the wastewater treatment equipment of sealing, make us hanging back, dare not adopt.When the present invention adopted air to be oxygen source, efficient can surpass the Hy-Flo biological fluidized bed, and to adopt pure oxygen in the present invention be oxygen source if having ready conditions, and efficient can also improve several times.
Effluent liquid through after the present invention's processing adopts when refluxing, and wherein a part is a phegma, and all the other are relief liquor; As not refluxing, the liquid effluent of fluidized bed container all is a relief liquor.All relief liquors could discharge after must handling through equipment for separating liquid from solid, and equipment for separating liquid from solid can adopt floating-medium filtering chamber, general rapid filter or inclined-plate clarifying basin.All phegmas can pass through, also can be without equipment for separating liquid from solid, and processed liquid and phegma, respectively or merge through water inlet pipe and enter in the container.
The present invention is as adopting same proportion, and the hollow plastic short tube of a kind of specification of same particle diameter is a filler, and during fluidized state, on same horizontal plane below the liquid level, packing density is basic identical; On the following different level of liquid level, packing density is discrepant, in order to dwindle or to eliminate this species diversity, can adopt proportion same particle size difference, and the proportion different-grain diameter is identical, and the hollow plastic short tube of all size that the proportion different-grain diameter is also different is a filler.
Biggest advantage of the present invention is energy-conservation.As everyone knows, the stressing conditions of the solids in the fluidized-bed layer is that one is the gravity of the solids of downward effect, another buoyancy and fluid resistance for upwards acting on.When point of fluidization, these two kinds of reactive forces certainly will equate, that is:
LF（1-ε）γ
s＝LF（！-ε）γ
e+△PF……（1）
This following formula is done slightly to change and can be got:
△P＝L（1-ε）（γ
s-γ
e）……（2）
In the formula: △ P: fluid resistance (kilogram/rice
2)
L: the height when solids are static in the fluidized-bed (rice)
F: the sectional area of fluidized-bed (rice
2)
ε: the voidage of fluidized-bed
γ
s: solids severe (kilogram/rice
3)
γ
e: liquid severe (kilogram/rice
3)
Wherein
ε＝ (V
H－V)/(V
H) ……（3）
In the formula: V
H: the fluidized-bed layer volume
V: the volume that solids are shared
If fluidizing medium is a yellow ground, its severe is 2600 kilograms/meter
3, ε=0.67, the waste water ratio refetches 1000 kilograms/meter
3, substitution formula (2):
△P
1＝L（1-0.67）（2600-1000）＝528L
Will make yellow ground expansion fluidisation on engineering, liquid stream must be with 25～40 meters/hour upflow velocity to the yellow ground energy supply, and medium fluidisation and wastewater biochemical requisite oxygen amount all require effluent liquid to reflux with 10～30 times reflux ratio, and energy consumption is very considerable.
The present invention is loaded with the hollow plastic short tube behind the microbial film, and severe can be at 950 kilograms/meter
3, ε=0.9, waste water severe is got 1000 kilograms/meter
3(owing to blast air, the severe of preferably getting solution-airmixture, its value＜1000 kilogram/meter
3, be actually very approaching with carrier severe), substitution formula (2):
△P
2＝L（1-0.9）（950-1000）＝-5L
By formula (4) as seen, its absolute value of the resistance of carrier convection cell of the present invention be yellow ground when being carrier fluid resistance 1%, direction is opposite, shows as minimum buoyancy.When operating with apparatus of the present invention, blast a small amount of gas stirring in the container bottom, just can reach fluidization, it is the fluidized-bed of carrier that its degree of uniformity can surpass with the yellow ground.The present invention relies on strength to make the required energy of carrier fluidisation, with relying on waterpower the required energy of yellow ground fluidisation is compared, will be as (4) formula institute result calculated, and as seen the energy of this device consumption will have considerable reduction.
Another advantage of the present invention is that device is simple.Because carrier floats on liquid upper, in device, needn't resemble and porous plate is set so that when stopping, be used to load yellow ground the yellow ground fluidized-bed; Because the present invention adopts strength to stir, fluidized state than make with fluid power yellow ground fluidizing state fierceness many, therefore the inside and outside epontic microbial film of carrier does not need the special demoulding device and the return mechanism of the carrier particle behind the demoulding more aging a little later will coming off voluntarily; Easy fluidisation of carrier of the present invention and fluidized state are easily even, and water dispensing apparatus is not had particular requirement.
Other advantage of the present invention is that running management is convenient, when actually operating, whether are the flow of processed waste water and the backflow of effluent liquid, and all visual water quality treatment of the size of reflux ratio, processing requirements adopt corresponding processing means and regulate arbitrarily within the specific limits and do not influence fluidized bed process, easy to operation than HY-Flo biological fluidized bed.
In addition, the present invention has very strong adaptability to the processed waste water quality and the water yield, both can be used for municipal wastewater and has handled, and the industrial organic waste water that also can be used for various concentration is handled.Practice shows that the organic waste water of high or low concentration is handled with the present invention, and effect is all good.
Sludge concentration of the present invention can substantially exceed sludge concentration 14 grams per liters of Hy-Flo fluidized-bed up to 35 grams per liters, and sludge quantity significantly reduces, and is greatly favourable to solid liquid separation and sludge dewatering.
Apparatus of the present invention are seen accompanying drawing 1.Below in conjunction with accompanying drawing 1, the structure and the operation of bio-chemical fluidized bed with floating granules wastewater treatment equipment described.
Rectilinear container 1 is the housing of fluidizer, can be circle, square, rectangle or other geometric cross section.In container 1, dispose the proportion that is loaded with behind the microbial film still less than the hollow open fluidizing medium 2 of processed liquid, when device operation operation, processed waste water is constantly sent into container through metering by inlet tube 3 by header tank or pump, the air of being sent into by gas blower is measuring after manage 4 by being located at the gas distributor 5 to lower opening of container bottom, import in the container bottom with certain speed, floating granules is subjected to the stirring from solution-airmixture, stir up and down, even fluidisation, form gas-liquid-solid three-phase fluidized bed, the oxygen supply insufficient section provides at fluidized-bed external application supplemental oxygen device 6, waste water to be processed be loaded with biomembranous particle and contact the molten Jie's oxygen in the microbial consumption waste water closely, pollutants in waste water matter is carried out bio-oxidation, thereby make waste water be purified processing.Portion is through stopping the filter screen 7 of floating granules from container for the waste water of handling, and from the liquid that rising pipe 8 is discharged, wherein some can reflux, also can not reflux, adopt when refluxing, phegma is through managing 9, by pump 10, by sending in the container 1 after 6 oxygenations of supplemental oxygen device.
Embodiment one:
Fluidizer diameter 1000mm, fluidized-bed virtual height 2700mm, treatment of dyeing and printing, water inlet biochemical oxygen demand (BOD) BOD5=751mg/l, chemical oxygen demand cod
Cr=1371mg/l, water outlet BOD5＜60mg/l, COD
5＜200mg/l, directly gas distribution intensity is 10～20 meters
3/ rice
2Hour, reflux ratio 2.5, volumetric loading is a 10kgBOD/ day rice
3
Claims (4)
1, a kind of by rectilinear container 1, treating water water inlet pipe 3, rising pipe 8, emptying shore pipe 11, distribution device 5, be loaded with the bio-chemical fluidized bed wastewater treatment equipment that biomembranous particle is formed, it is characterized in that:
A. fluidizing medium adopts hollow open plastic tubulature 2, and plastic tubulature 2 constitutes by monocycle or by many rings short tube of some monocycles combinations, and the monocycle diameter is 3～10mm, and surfaces externally and internally is coarse and have a striped,
B. gas distributor 5 is equipped with in container 1 bottom,
C. in container 1, the gas distributor 5 direct oxygen supplys, also have supplemental oxygen device 6 outside the container 1,
D. filter screen 7 is equipped with in the treating water exit,
E. adopting air or pure oxygen is oxygen source,
F. processed liquid and phegma, respectively or merge through water inlet pipe 3 and enter in the container 1.
2, device according to claim 1 is characterized in that rectilinear container 1 cross section is for circular.
3, device according to claim 1, the monocycle cross-sectional diameter that it is characterized in that plastic tubulature 2 wherein is 4～6mm.
4, device according to claim 1 is characterized in that it is oxygen source that gas distributor and supplemental oxygen device adopt air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87101071A CN1018617B (en) | 1987-06-23 | 1987-06-23 | Bio-chemical fluidized bed with floating granules |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87101071A CN1018617B (en) | 1987-06-23 | 1987-06-23 | Bio-chemical fluidized bed with floating granules |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1030028A CN1030028A (en) | 1989-01-04 |
| CN1018617B true CN1018617B (en) | 1992-10-14 |
Family
ID=4813157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87101071A Expired CN1018617B (en) | 1987-06-23 | 1987-06-23 | Bio-chemical fluidized bed with floating granules |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1018617B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105129977B (en) * | 2015-10-10 | 2018-02-02 | 许建民 | A kind of aerobic fluidized-bed bioreactor and its technique |
| CN106830297A (en) * | 2017-03-29 | 2017-06-13 | 天津西敦津洋环保科技有限公司 | A kind of light particle system and method for sewage disposal |
| CN106904729A (en) * | 2017-03-29 | 2017-06-30 | 天津西敦津洋环保科技有限公司 | A kind of hybrid particles system and method for sewage disposal |
| CN106904740A (en) * | 2017-03-29 | 2017-06-30 | 天津西敦津洋环保科技有限公司 | A kind of sewage disposal device of series connection and application |
| CN106865746B (en) * | 2017-03-29 | 2024-03-26 | 天津西敦津洋环保科技有限公司 | Sewage treatment system comprising filler |
| CN110862184B (en) * | 2018-08-27 | 2022-06-17 | 中国石油化工股份有限公司 | Oxygen-deficient fluidized bed device for high-concentration nitrate-nitrogen wastewater treatment |
-
1987
- 1987-06-23 CN CN87101071A patent/CN1018617B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1030028A (en) | 1989-01-04 |
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