CN101570360A - Oil refining sewage advanced treatment bioreactor - Google Patents
Oil refining sewage advanced treatment bioreactor Download PDFInfo
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- CN101570360A CN101570360A CNA2009100400658A CN200910040065A CN101570360A CN 101570360 A CN101570360 A CN 101570360A CN A2009100400658 A CNA2009100400658 A CN A2009100400658A CN 200910040065 A CN200910040065 A CN 200910040065A CN 101570360 A CN101570360 A CN 101570360A
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- filler
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- oil refining
- aeration
- inner barrel
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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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Abstract
The invention provides an oil refining sewage advanced treatment bioreactor, which comprises a sewage inlet [12], a pure water outlet [16], an aeration device and a back purge device, the reactor [1] consists of a shell [2] and an inner cylinder [17] arranged in the shell, a reaction area is formed between the shell [2] and the inner cylinder [17] and filled with a filler [3], the filler [3] is supported by a porous support plate [8] fixed between the shell [2] and the inner cylinder [17] and positioned on the sewage inlet [12], the inner cylinder [17] is provided with an aeration area inside, and an aeration head [5] of the aeration device is arranged on the bottom of the aeration area. The bioreactor is advanced in process technology, economic, reasonable, stable, reliable and strong in industrialized popularization, and has important significance in realizing sewage recycling, saving fresh water and reducing environmental pollution for oil refining enterprises.
Description
Technical field
The present invention relates to a kind of waste disposal plant, is a kind of oil refining sewage advanced treatment bioreactor specifically.
Background technology
China's water resources wretched insufficiency, shortage of water resources have become the important topic that people pay close attention to.Petrochemical industry is the consumption rich and influential family of water resources, also is the discharging rich and influential family of waste water.Sinopec processing ton crude oil water withdrawal was 1.15t in 2004, and the service water repeating utilization factor is 94.5%; CNPC's processing ton crude oil water withdrawal is 1.26t, the service water repeating utilization factor is 94.8%, this level with external similar refinery 0.02～0.5t differs greatly, and has seriously restricted the development of oil refining enterprise, especially seeks out the survival and development of the oil refining enterprise of scale and benefit.The waste water of discharging in therefore oil refining must being produced carries out the recycling treatment reuse, and reusing sewage not only can be saved a large amount of fresh waters, and can reduce wastewater disposition significantly, thereby becomes the emphasis of industrial enterprise's water-saving and emission-reducing.
From domestic and international research trend, charcoal absorption, chemical oxidation, membrane sepn and biological advanced treatment are the focuses of studying at present.The extensive recycling of oil refining sewerage also belongs to the starting stage in China, has explored the enterprise of practice to some extent to some extent from this respect, all also has some problems, as the cost height, after treatment waste water quality fluctuation is big, COD exceeds standard sometimes etc.
Summary of the invention
The purpose of this invention is to provide a kind of simple in structure, stable, oil refining sewage advanced treatment bioreactor that treatment effect is good.
A kind of oil refining sewage advanced treatment bioreactor provided by the invention, comprise sewage inlet, water purification water outlet, aerating apparatus and back-purge system, this reactor is by shell and place the inner barrel in the shell to constitute, form reaction zone between shell and the inner barrel, filler is housed, this filler is supported by the porous support plate that is fixed between shell and the inner barrel and be positioned at above the sewage inlet, and the inner barrel the inside is the aeration zone, and the aeration head of aerating apparatus is installed in the bottom, aeration zone.
The filler bed course is installed between porous support plate and filler, and the back flushing wind-distributing pipe of back-purge system is fixed in the filler bed course.
The inner barrel upper end protrudes upward outside the filler, and lower ends downward is stretched out outside the porous support plate.
The water-in of back-purge system is connected on the shell of porous support plate below, and water outlet connects on the shell, between corresponding filler upper surface and the inner barrel upper port.
The porosity of filler 〉=58%, specific surface area are 3.5～7.8 * 10
4Cm2/g, tap density are 650～850kg/m
3
The present invention is owing to adopt exclusive isolated aeration, and under the situation of additionaling power not, the lifting force that utilizes aeration to produce makes sewage promote along inner barrel, and the biological bed reaction zone of flowing through again forms the big flow internal recycle water yield.Avoid direct aeration to the washing away of filler, can prevent the loss of microorganism on the one hand effectively, protected biophasic integrity; avoid aeration channel to occur on the other hand; make the padding aeration oxygen supply wretched insufficiency at other position, and, cause filler to harden because anoxic forms sludge bulking.Reduce owing to flow velocity increases the thickness that makes the mass transfer frictional belt simultaneously, thereby reduced the interior resistance to mass transfer of biological contact oxidation reactors, strengthened the exchange of medium between sewage and the organism, oxygen shifts and the utilising efficiency height, has improved the treatment efficiency of reactor.The ability that has improved the anti-toxic substance of reactor organisms bed has in addition also promptly improved the volumetric loading and the impact resistance of reactor, and use range is more extensive, moves more stable.
When the present invention meets integrated wastewater discharge standard (GB8978-1996) primary standard in the water inlet index, treated, COD, ammonia nitrogen, petroleum substance and SS average removal rate are respectively 42.8%, 72%, 47.8%, 96%, and its water outlet average quality concentration is respectively 52mgL
-1, 1.1mgL
-1, 1.5mgL
-1, 1.6mgL
-1, reach China Petrochemical Industry's circulating water system standard.
It is feasible that the present invention is applied to advanced Treatment for Refinery Waste Water, Technology advanced person, economical rationality, reliable and stable, and industrialization promotion is strong, realizes reusing sewage for oil refining enterprise, saves fresh water, alleviates environmental pollution and has crucial meaning.
Description of drawings
Fig. 1 is a structure iron of the present invention;
Fig. 2 is an application synoptic diagram of the present invention.
Embodiment
With reference to Fig. 1, a kind of oil refining sewage advanced treatment bioreactor provided by the invention, comprise sewage inlet 12, water purification water outlet 16, sewage draining exit 9, aerating apparatus and back-purge system, inlet pipe 14, wind-distributing pipe 7 and backwash water-in 11, backwash water outlet 18 are arranged in the back-purge system.
This reactor 1 is by shell 2 and place the inner barrel 17 of 2 li on shell to constitute, and is round shape, and vertical with one heart the laying forms reaction zone between shell 2 and the inner barrel 17, is filled with filler 3, and the porosity of filler 3 〉=58%, specific surface area are 3.5～7.8 * 10
4Cm2/g, tap density are 650～850kg/m
3This filler 3 is supported by the porous support plate 8 that is fixed between shell 2 and the inner barrel 17 and be positioned at above the sewage inlet 12, inner barrel 17 the insides are the aeration zone, the aeration head 5 of aerating apparatus is installed in the bottom, aeration zone, is connected with the aeration airduct 15 of the aerating apparatus that stretches into inner barrel 17 from top to bottom.
Between porous support plate 8 and filler 3 filler bed course 6 is installed, the back flushing wind-distributing pipe 7 of back-purge system is fixed on 6 li of filler bed courses, and is connected with inlet pipe 14 in the back-purge system.
The backwash water-in 11 of back-purge system is connected on the shell 2 of porous support plate 8 belows, and backwash water outlet 18 connects on the shell 2, between corresponding filler 3 upper surfaces and inner barrel 17 upper port.
For the ease of maintenance, have spigot discharge 13 in the side of shell 2.
With reference to Fig. 2 is application synoptic diagram of the present invention.Second pond 19 connects the sewage import 12 of reactor 1 through fresh feed pump 20, and pneumatics pump 22 connects the inlet pipe 14 and the aeration airduct 15 of back-purge system respectively, and clean water basin 21 connect water purification water outlet 16 and backwash water-in 11 respectively.
Reactor of the present invention is once in south certain refinery shop trial of purifying waste water, and tests used sewage and be the externally discharged waste water of second pond after the biochemical treatment of workshop of purifying waste water.
The testing apparatus parameter: the designing treatment water yield is 5～8m
3H
-1, be 5.2m during the steady running
3H
-1Reactor inside diameter is 2500mm, high 45mm, and nickel steel is made.Packing volume is 10m
3, gas-water ratio is 4～5: 1.The filler bed course is made up of rubble, thickness 300mm.
Sewage is entered by reactor bottom, aeration head is arranged at aeration lifting zone bottom, sewage and the sewage in the reactor that the castering action that aeration produces during work will enter reactor suck the aeration lifting zone in the lump through return port, and in this mixing oxygenation, promote by aeration again, water inlet forms big current from bottom to top in aeration cylinder, flow into the reaction zone of biologic packing material bed.Reaction zone is equipped with light porous biologic packing material as microbe carrier, and top-down big current carry out organic removal process on carrier.Along with holding back of biomembranous growth and packing layer, behind the operation certain hour, the packing layer space will progressively reduce, water flux descends, and this will cause biologic packing material bed oxygen supply deficiency and cause biological membrane anaerobicization, reduce processing efficiency, need this moment packing layer is carried out back flushing, the mictoplasm of biological bed is got rid of, and impelled microbial film to upgrade, make it to resume work again.
The isolated aeration bio-reactor adopts the mode of natural membrane.(SS carries out the biofilm domestication 40～80mg/l) to utilize a large amount of free microorganisms that contain in the water.A large amount of free microorganisms are after reactor for treatment, SS is that bed of packings is adsorbed substantially, free microorganism in the water also is adsorbed on the bacterium source that becomes microorganism in the biological bed, therefore need not special inoculation, when water temperature is 20～35 ℃, low hydraulic load operation through 3～6 days, when reactor to water in the degraded of each pollutent when positive effect is arranged, show that the biofilm domestication finishes.The microbial film of filling surface mainly is made up of discontinuous zoogloea (bacterium), is yellow-green colour, and upgrowth situation is good.Device can carry out running at full capacity after the biofilm domestication was finished.
The isolated aeration bio-reactor combines bio-oxidation and biofloculation dexterously, brings into play bio-oxidation and physics crown_interception synchronously.Through the processing of original biochemical system above the tens of hours residence time, the water outlet B/C of second pond is lower than, BOD
5Value is less than 20, substantially detect less than BOD through water outlet after the reactor for treatment, and the COD degradation amount is at 30～100mg/L, obviously in reactor, not only exist biological oxidation, but also there is the effect of biofloculation, the microorganism relic in purifying waste water, all the other are in the pollutent of solubilised state or colloidal attitude and are all removed from water by bio-oxidation and biological flocculation.Under the condition of aerobic; some has the polymer substance of flocculation ability microorganisms in active sludge suede grain or the microbial film; by to effects such as the adsorption bridging of pollution substance, electrically neutralization, net collection; adsorb a part of colloidalmaterial and removal fast, this removal is mainly held back, is adsorbed by filler in reactor.Flocculence microbial metabolism simultaneously also helps removing organic pollutant, flocculence microbial hydrolytic larger molecular organics is a small organic molecule, synthesize self cell simultaneously, and then inorganicization, microorganism also absorbs or the undecomposed organism completely of eating, and by its part of degrading than the long cycle.Biofloculation is made up of lived microorganism, and the energy self-reproduction has biology " activity ", can use repeatedly continuously.
COD and ammonia-N removal rate increase with the increase of hydraulic detention time (HRT), when HRT is low when (HRT＜1.5), COD and ammonia-N removal rate and degradation rate are all lower, illustrate that the wastewater treatment time is too short, be lower than contaminant degradation and flocculate the required time, the device processing power is not fully exerted; When HRT＞2, the time lengthening that waste water contacts with microbial film, the corresponding raising of COD and ammonia-N removal rate, and tending towards stability gradually, but that their degradation rate descends is very fast.Though the residence time of this explanation waste water can be improved the clearance of organic pollutant, the oversize processing power that can influence device of treatment time.HRT from the clearance that 3.0h drops to the 1.5h pollutent can also keep＞50% the explanation this reactor have good turndown ratio.Consider that from clearance and throughput two aspects appropriate H RT should be 2.0h, this moment, COD and ammonia-N removal rate were respectively 48.2% and 70.9%.
Test-results shows that although each Pollutant levels fluctuation is bigger in the water inlet, stable effluent quality behind reactor illustrates that this technology has higher volumetric loading and very strong shock-resistant ability.COD, ammonia nitrogen, petroleum substance and SS average removal rate are respectively 42.8%, 72%, 47.8%, 96%, and its water outlet average quality concentration is respectively 52mgL
-1, 1.1mgL
-1, 1.5mgL
-1, 1.6mgL
-1This shows that although each pollutent index of intaking is all very low, reactor still has higher removal, water outlet is very limpid.Clearly, the isolated aeration bioreaction technology has reached the purpose of advanced treatment of wastewater.
Claims (5)
1, a kind of oil refining sewage advanced treatment bioreactor, comprise sewage inlet [12], water purification water outlet [16], aerating apparatus and back-purge system, it is characterized in that this reactor [1] is by shell [2] with place the inner barrel [17] in the shell to constitute, form reaction zone between shell [2] and the inner barrel [17], filler [3] is housed, this filler [3] is supported by the porous support plate [8] that is fixed between shell [2] and the inner barrel [17] and be positioned at above the sewage inlet [12], inner barrel [17] the inside is the aeration zone, and the aeration head of aerating apparatus [5] is installed in the bottom, aeration zone.
2, oil refining sewage advanced treatment bioreactor according to claim 1 is characterized in that between porous support plate [8] and filler [3] filler bed course [6] being installed, and the back flushing wind-distributing pipe [7] of back-purge system is fixed on filler bed course [6] lining.
3, oil refining sewage advanced treatment bioreactor according to claim 1 is characterized in that inner barrel [17] upper end protrudes upward filler [3] sunset, and lower ends downward is stretched out outside the porous support plate [8].
4, oil refining sewage advanced treatment bioreactor according to claim 3, the water-in [11] that it is characterized in that back-purge system is connected on the shell [2] of porous support plate [8] below, and water outlet [18] connects that shell [1] is gone up, between corresponding filler [3] upper surface and inner barrel [17] upper port.
5, according to claim 11 described oil refining sewage advanced treatment bioreactor is characterized in that porosity 〉=58%, the specific surface area of filler [3] is 3.5～7.8 * 10
4Cm2/g, tap density are 650～850kg/m
3,
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100400658A CN101570360A (en) | 2009-06-03 | 2009-06-03 | Oil refining sewage advanced treatment bioreactor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100400658A CN101570360A (en) | 2009-06-03 | 2009-06-03 | Oil refining sewage advanced treatment bioreactor |
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| Publication Number | Publication Date |
|---|---|
| CN101570360A true CN101570360A (en) | 2009-11-04 |
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ID=41229863
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|---|---|---|---|
| CNA2009100400658A Pending CN101570360A (en) | 2009-06-03 | 2009-06-03 | Oil refining sewage advanced treatment bioreactor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101704608B (en) * | 2009-11-19 | 2011-06-29 | 浙江工业大学 | Distributed sewage advanced treatment device with sludge treatment and method thereof |
| CN102311200A (en) * | 2010-07-07 | 2012-01-11 | 中国石油化工股份有限公司 | Reactor for treating high concentration sewage and sewage treatment method |
| CN105884135A (en) * | 2016-05-19 | 2016-08-24 | 浙江工业大学 | Polluted-river-network-source-water multi-carrier biomembrane and membrane drinking water treatment facility |
-
2009
- 2009-06-03 CN CNA2009100400658A patent/CN101570360A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101704608B (en) * | 2009-11-19 | 2011-06-29 | 浙江工业大学 | Distributed sewage advanced treatment device with sludge treatment and method thereof |
| CN102311200A (en) * | 2010-07-07 | 2012-01-11 | 中国石油化工股份有限公司 | Reactor for treating high concentration sewage and sewage treatment method |
| CN105884135A (en) * | 2016-05-19 | 2016-08-24 | 浙江工业大学 | Polluted-river-network-source-water multi-carrier biomembrane and membrane drinking water treatment facility |
| CN105884135B (en) * | 2016-05-19 | 2018-06-26 | 浙江工业大学 | Pollute the multichip carrier biomembrane of network of waterways source water and film drinking water treatment equipment |
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Open date: 20091104 |