CN102050518A - Film forming method for biological carrier in internal circulation bioreactor - Google Patents
Film forming method for biological carrier in internal circulation bioreactor Download PDFInfo
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- CN102050518A CN102050518A CN2009101881208A CN200910188120A CN102050518A CN 102050518 A CN102050518 A CN 102050518A CN 2009101881208 A CN2009101881208 A CN 2009101881208A CN 200910188120 A CN200910188120 A CN 200910188120A CN 102050518 A CN102050518 A CN 102050518A
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Abstract
The invention relates to a film forming method for a biological carrier in an internal circulation bioreactor. The film forming method comprises the following steps of: adding the needed biological carrier into the internal circulation bioreactor by 2 to 5 times; every time after a biological filler is added, introducing air to make the biological carrier in a fluidized state; adding domesticated inoculation active sludge into the bioreactor in a spraying way; after spraying, ventilating for 6 to 72 hours; discharging the sludge; and culturing in a continuous water feeding way. In the method, needed starting power is low, film forming time is short and a formed biological film has high impact load resistance.
Description
Technical field
The present invention relates to a kind of biological wastewater treatment technology, relate in particular to a kind of biomembrance process and handle waste water technology, specifically is the colonization method of bio-carrier in a kind of internal circulation biological reactor.
Background technology
Internal circulation biological reactor is to be a kind of novel sewage disposal technology of foundational development with traditional three-phase fluidized bed principle.Fluidized-bed reactor wherein is the gas-liquid-solid three-phase symbiotic system, its rely on bubble is overflowed in aeration head original speed and the up-flow district with fall that the density difference that forms between the stream district promotes bio-carrier and waste water is mobile at the reactor internal recycle, the carrier particle that is coated by microbial film distributes in whole device more equably, fully contact with pending waste water, reach the purpose of the materials such as organic and reductibility in the degrading waste water by the microbial film that is grown in carrier surface.It is different from traditional bio membrane process, compares with traditional fluidized-bed, and it has following these characteristics: the specific surface area of (1) carrier is big, and the shearing action that (2) fluid turbulent fluctuation is caused is big, (3) carrier subglobular.
For general biomembrance process, as biological filter process, bio-disc system and biological contact oxidation process, general natural membrane method, the inoculation membrane formation method of adopting, circulation biofilm method and quick spoil disposal biofilm method etc., reported all also in the document that these four kinds of methods have its relative merits separately, and because internal circulation biological reactor has the characteristics of himself, therefore these four kinds of colonization methods are not suitable for the biologic packing material biofilm of internal circulation biological reactor, also do not have suitable method about bio-carrier colonization method in the internal circulation biological reactor at present.
Summary of the invention
The object of the present invention is to provide that the required startup power of a kind of bio-film colonization is low, film formation time is short, the colonization method of bio-carrier in the strong internal circulation biological reactor of the microbial film anti impulsion load ability of formation.
The colonization method of bio-carrier comprises following process in the internal circulation biological reactor of the present invention: divide 2～5 times with required bio-carrier adding internal circulation biological reactor, treatment process behind each adding biologic packing material is: bubbling air makes bio-carrier be in fluidized state, adopt the spray mode to add the inoculation of activated-sludge of having tamed to inside reactor, after spray finishes, vexed 6～the 72h that exposes to the sun ventilates, preferred 12～36h, then mud is discharged, adopt water inlet continuously to cultivate, the water inlet incubation time is 0.5～3 day continuously, preferred 1～2 day.
In the inventive method, add the bio-carrier of total bio-carrier volume 30%～60% for the first time in internal circulation biological reactor, the amount that at every turn adds bio-carrier thereafter is 10%～50% of total bio-carrier volume.
In the inventive method, the air capacity when bubbling air makes bio-carrier be in fluidized state preferably makes bio-carrier be in the minimum tolerance of fluidized state, and promptly bio-carrier just is in fluidized state.
In the inventive method, adopt the spray mode to add in the inoculation of activated-sludge process of having tamed to inside reactor, control inoculation of activated-sludge concentration is 0.5～5g/L, preferably adopts per 3～5 minutes sprays once.
In the inventive method, the vexed operation of exposing to the sun refers to that only bubbling air, reactor do not introduce yet expel liquid (can introduce nutritive medium) not of liquid, and dissolved oxygen concentration vexedly exposes to the sun that bio-carrier also is in fluidized state during operation about 2～4mg/L.
In the inventive method, the continuous water inlet after the domestication of inoculation of activated-sludge and vexed the exposing to the sun of ventilating is cultivated and can specifically be determined by those skilled in the art according to the particular case of handling waste water.Load when the organic loading of the culturing process of wherein intaking continuously water inlet adopts normal the operation gets final product, and hydraulic detention time is preferably 0.5～2h.
Bio-carrier described in the present invention can be the various carriers that are applicable in the internal circulation biological reactor, but the rigid carrier that preferable particle size is less, density is slightly larger than water.
The advantage of colonization method of the present invention and beneficial effect:
(1) bio-carrier adds in the internal circulation biological reactor several times.Carrier repeatedly add the power that can the reduction system starts, energy-saving and cost-reducing, because required tolerance is less, can reduce the shearing action that the fluid turbulent fluctuation causes so simultaneously, reduce the frictional force between the particle, help microbial film in carrier particle surface adsorption, growth.
(2) bio-carrier is in fluidized state all the time during biofilm, can increase the probability that seed sludge contacts with particle like this, increases contact area, shortens film formation time.
(3) seed sludge adopt spray, mode repeatedly adds in the reactor.Can increase the probability that particle contacts with mud like this, make that microorganism is easier to be adhered at particle surface, shorten film formation time.
(4) seed sludge adopts the mode of disposable emptying.Can reduce the competition of suspension microorganism and tack microorganism in the reactor like this, because the ratio rate of rise of suspension microorganism is far longer than the tack microorganism, too much as suspension microorganism in the reactor, will greatly suppress the tack microbial growth, be not easy to the biomembranous formation of particle surface, therefore, take the mode of disposable emptying mud, can be easier to the biomembranous formation of particle surface for the little natural disposition growth of tack creates favorable conditions.
Description of drawings
Fig. 1 is the internal circulation biological reactor structural representation.
Wherein: 1 is the mud spray equipment, and 2 is water-in, and 3 is water outlet, and 4 is air intlet.
Embodiment
The method of introducing bio-carrier with three times is an example, and the colonization method process of bio-carrier is as follows in a kind of concrete internal circulation biological reactor of the present invention:
(1) at first add the bio-carrier of all biological carrier bulk 30%～60% in internal circulation biological reactor, bubbling air makes the carrier particle of inside reactor just all be in fluidized state then.
(2) adopt the mode of spray to add the inoculation of activated-sludge of having tamed from reactor top, per 3～5 minutes sprays once, inoculation of activated-sludge concentration is 0.5～5g/L in the controlling reactor, after about 20min spray finished, the vexed 12～36h that exposes to the sun adjusted tolerance this moment, keeping carrier particle all to be under the fluidized state, keep the interior dissolved oxygen concentration of reactor about 2～4mg/L, after the vexed end of exposing to the sun, with the whole emptyings of mud.
(3) beginning water inlet continuously, the time is 1～2 day, stops into water then, microscopically can see that carrier surface has the skim microbial film.
(4) again to the bio-carrier of inside reactor adding 20%～40%, suitably adjust the tolerance size, make the particle of adding also all be in fluidized state, repeat (2), (3) two steps, condition is in step (2) and the described operational condition scope of step (3).
(5) remaining bio-carrier is all added inside reactor, suitably adjust the tolerance size, make the particle of adding also all be in fluidized state, repeating step (2), beginning is water inlet continuously, forms sophisticated microbial film up to carrier surface.
Embodiment 1
Test is carried out in internal circulation biological reactor as shown in Figure 1, and the reactor effective volume is 15.5L, and cubic capacity is 31L.
Used waste water is artificial preparation, and waste water is pressed COD: N: P=100: prepare at 5: 1, see Table 1 concrete the composition, and bio-carrier is the biological ceramic particle of 0.5～2mm, and mud picks up from the secondary sedimentation basins of sewage work's biochemistry pool, tames through cultivating before the adding.
The bio-carrier particle that accounts for reactor effective volume 2.5% is added from reactor top the reactor (account for total bio-carrier volume 46%), feed gas then, make the whole fluidisations of particle, open the mud spray equipment, set 3～5min spray once, seed sludge concentration is 1g/1, approximately spray finishes behind the 20min, adjusts tolerance, makes dissolved oxygen in the reactor about 2～4mg/L, behind the vexed 24h that exposes to the sun, with the whole emptyings of mud, beginning is water inlet continuously, and COD is at 500mg/L in water inlet, pH is about 7, hydraulic detention time (HRT)=1h was intake after 1 day, stopped into water, can see that at microscopically particle surface has campanularian and zoogloea to adhere to this moment, and the COD clearance of this moment is about 60%; Stop into water, add the bio-carrier particle (account for total bio-carrier volume 27%) in reactor account for reactor effective volume 1.5% then, repeat above rapid; The last bio-carrier particle (account for total bio-carrier volume 27%) in reactor that accounts for reactor effective volume 1.5% that adds again, step above repeating is finished until biofilm.
After biofilm begins 6d, can see the whole biofilms of inside reactor particle surface, color is light yellow, transparent, the COD clearance has reached more than 85%, know by microorganism microscopy the biofilm particle, particle surface is attached with a large amount of campanularians, a small amount of wheel animalcule and zoogloea, illustrates that biofilm finishes the microbial film maturation.
The artificial preparation of table 1 waste water composition table (COD=10g/L) unit (mg)
It is the internal circulation biological reactor of 33L that useful volume is adopted in test, the carrier particle diameter is the biological ceramic particle of 0.5～0.71mm, seed sludge concentration is 2g/L, and the carrier particle total mass is 2.5kg, divides to add for three times in the reactor, be 30% of total carrier particle volume for the first time, the vexed 12h that exposes to the sun is 45% of total carrier particle volume for the second time, the vexed 36h that exposes to the sun, be 25% of total carrier particle volume for the third time, the vexed 24h that exposes to the sun.Waste water is artificial preparation waste water, and COD: N: P=100: 5: 1, waste water composition saw Table 1, and other test operation condition and step are with embodiment 1.
Water inlet COD is about 200mg/L, HRT is 0.55h, can find that the campanularian apposition growth is arranged on the carrier behind the operation 3d, can be observed in the 4th day has a large amount of campanularians on some carriers, this moment, attached biomass accounted for 60% of total biomass, and to 6d, as seen a large amount of campanularians, thread fungus are arranged on the carrier, attached biomass accounts for 92% of total biomass, and microbial film is closely knit, light yellow, transparent, proves that the microbial film biofilm finishes.
It is the internal circulation biological reactor of 3.16L that total useful volume is adopted in test, and the carrier particle diameter is 20～40 purpose porous polymer monoliths, and waste water is diesel oil hydrogenation wash water and the artificial mixed water of preparing waste water, and ratio is 1: 4, and it is as shown in table 1 manually to prepare the waste water composition.
The carrier grain divide and to add for three times in the reactor, be 55% of total carrier particle volume for the first time, the vexed 48h that exposes to the sun, be 25% of total carrier particle volume the second time, the vexed 36h that exposes to the sun is 20% of total carrier particle volume for the third time, the vexed 24h that exposes to the sun.Other test operation condition and step are with embodiment 1.
Biofilm starting characteristics test data see Table 2.As seen from Table 2, start a few days ago in test, the COD clearance is higher, this is because due to the inside reactor active sludge worked, along with the discharge of active sludge, the COD clearance began to descend, up to starting the 5th day, the COD clearance begins to rise, and by the 6th day, the COD clearance just reached more than 90%, the microscopy particle as seen, there is campanularian in particle surface, wheel animalcule, paramecium and thread fungus, naked eyes visible particles surface coverage one deck is light yellow in addition, the transparent organism film, recording microbial film thickness is 100 μ m, by the 8th day, recording microbial film thickness is 130 μ m, proves that the biofilm starting characteristics test finishes the microbial film maturation.
Table 2 biofilm starting characteristics test data sheet
Claims (9)
1. the colonization method of bio-carrier in the internal circulation biological reactor, it is characterized in that: colonization method comprises following process: divide 2～5 times with required bio-carrier adding internal circulation biological reactor, treatment process behind each adding biologic packing material is: bubbling air makes bio-carrier be in fluidized state, adopt the spray mode to add the inoculation of activated-sludge of having tamed to inside reactor, after spray finishes, vexed 6～the 72h that exposes to the sun ventilates, then mud is discharged, adopt water inlet continuously to cultivate.
2. it is characterized in that in accordance with the method for claim 1: the vexed time of exposing to the sun of ventilating is 6～72h.
3. it is characterized in that in accordance with the method for claim 1: the incubation time of intaking continuously is 0.5～3 day.
4. it is characterized in that in accordance with the method for claim 1: the incubation time of intaking continuously is 1～2 day.
5. in accordance with the method for claim 1, it is characterized in that: add the bio-carrier of total bio-carrier volume 30%～60% for the first time in internal circulation biological reactor, the amount that at every turn adds bio-carrier thereafter is 10%～50% of total bio-carrier volume.
6. according to claim 1 or 5 described methods, it is characterized in that: the air capacity when bubbling air makes bio-carrier be in fluidized state is to make bio-carrier be in the minimum tolerance of fluidized state.
7. in accordance with the method for claim 1, it is characterized in that: adopt the spray mode to add in the inoculation of activated-sludge process of having tamed to inside reactor, control inoculation of activated-sludge concentration is 0.5～5g/L.
8. in accordance with the method for claim 1, it is characterized in that: the vexed operating process control dissolved oxygen concentration that exposes to the sun is at 2～4mg/L, vexedly exposes to the sun that bio-carrier is in fluidized state during operation.
9. it is characterized in that in accordance with the method for claim 1: the hydraulic detention time of the continuous water inlet culturing process water inlet after the domestication of inoculation of activated-sludge and vexed the exposing to the sun of ventilating is 0.5～2h.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103880184A (en) * | 2014-03-27 | 2014-06-25 | 孔晔 | Sludge-free biologic ball ultra-clean sewage treatment method and system |
| CN111995045A (en) * | 2020-06-28 | 2020-11-27 | 中船第九设计研究院工程有限公司 | Film forming method of integrated biological activated carbon device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103224282A (en) * | 2013-05-15 | 2013-07-31 | 中国海洋大学 | Method and special equipment for treating oil field wastewater |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1164507C (en) * | 2002-03-15 | 2004-09-01 | 清华大学 | Stuffing-throwing fluidized bed membrane bioreactor and water treating method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103880184A (en) * | 2014-03-27 | 2014-06-25 | 孔晔 | Sludge-free biologic ball ultra-clean sewage treatment method and system |
| CN103880184B (en) * | 2014-03-27 | 2016-01-27 | 孔晔 | A kind of without the ultra-clean sewage water treatment method of sludge organism ball and system |
| CN111995045A (en) * | 2020-06-28 | 2020-11-27 | 中船第九设计研究院工程有限公司 | Film forming method of integrated biological activated carbon device |
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