CN101973641B - Hyposmosis/super-hyposmosis oil extraction sewage reinjection method in oil field - Google Patents
Hyposmosis/super-hyposmosis oil extraction sewage reinjection method in oil field Download PDFInfo
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Abstract
The invention relates to an improved hyposmosis/super-hyposmosis oil extraction sewage reinjection method in an oil field, which is characterized in that a combination strain of Zoogloea sp, Bacillus cereus and Pseudomonas alcaligenes mainly for removing oil and a combination strain of Brachybacteriumcollins Bacillus licheniformis Bacillus subtilis and Pseudomons sp for mainly degrading organic pollutants are respectively attached in an aerobic pool, and suspension filling with density of 65-85V/V% and/or separatly arranged suspension filling and biological aerated filter filling are filled and treated in sequence, wherein a separation membrane is a fiber membrane or vacuum membrane or gas stripping membrane or vibration membrane meeting the requirement on filtration, and the fine filtration is diatomite filtration. The synergistic effect of the process greatly improves the preprocessing effect to ensure that the follow-up membrane separation can adopt conventional economic separation treatment such as the hollow fiber membrane or vacuum membrane or gas stripping membrane or vibration membrane, or adopt the diatomite filtration. Compared with the prior art, the invention has the advantages of short treatment period and low investment and treatment cost.
Description
Technical field
The present invention is the improvement to hyposmosis/extra permeability oilfield produced-water reinjection treatment process, especially to the improvement of applicant's first to file patent again CN03112720.7.
Background technology
China's oil reservoir belongs to hyposmosis, extra permeability oilfield mostly.Along with wearing out gradually of conventional oil reservoir, hyposmosis, extra-low permeability oil reservoirs water flooding recovery not only consume great lot of water resources, and extraction sewage quantity very big (greater than petroleum production).Oilfield produced waste water has suspension object height (50～700mg/l); Oil-contg high (20～300mg/l); Saltiness high (salinity is up to 150000mg/l); Oil-containing complicated (existing oil slick has dispersed oil, oil in water emulsion again), organic components is complicated, difficult degradation (except that containing crude oil, also containing lipid acid, tensio-active agent, oil-displacing agent, emulsion splitter, viscosity-depression agent, inhibiter, organosulfur (sulfide is up to 50mg/l) etc.).Oleaginousness is high, the water quality composition is complicated, biodegradability is poor, intractability is big, processing cost is high is the key character of this type of sewage.Extraction sewage and reservoir fluid and reservoir compatibleness are good, are used for the oil field re-injection after the processing and can improve RF, therefore require extraction sewage to be used for re-injection more than 90%, and can save oil recovery simultaneously needs a large amount of fresh waters.Hyposmosis, extra permeability oilfield, rate of permeation is low, formation pore is tiny, and the molecule of water is injected in absorption easily, delay; As handling re-injection by force not up to standard, will cause reservoir choke, the injury rock core; Water injection pressure rises, and tar productivity descends, and also can cause the corrosion of equipment and pipeline scaling simultaneously.Therefore, hyposmosis, extra permeability oilfield re-injection water require high especially: suspended substance≤1mg/l, median particle size≤1 micron, oil≤5mg/l or 1mg/l.Be employing fine filtering, for example membrane sepn or diatomite filtration for this type of WWT to the unique effective ways of re-injection water up to standard.Yet this type of sewage with oil, contain hardly degraded organic substance, very easily cause filtration medium to pollute, effectively life cycle is extremely short; Prior art can only unique employing membrane sepn; But be difficult to obtain after film pollutes clean recover, cause the film replacement cycle also shorter, actual being difficult to of engineering accepted.Therefore adopting an effective measure and reduce the pollution to film of oil, organic pollutant to greatest extent, make to get into water base of separating treatment and do not pollute or the less contamination film, is efficient, the stable key that adopts membrane sepn; And the pre-treatment effect directly influences the selection and the membrane sepn efficient of later separation film, influence investment simultaneously, the processing residence time and working cost etc.For this reason, people adopt multiple film pre-treating process, to reduce treating water film are polluted.
Chinese patent CN1854093 oil-containing sewage treatment technique is handled through adopting dissolved air flotation process earlier, handles obtaining high-quality reuse water again through ultrafiltration membrane system, and selectivity adopts reverse osmosis treatment system to carry out deep purifying again becomes high-quality water.
Chinese patent CN101264999 oilfield produced waste water treatment process is removed most of suspended particle and oils through flocculation sediment earlier; The supernatant acidifying that is hydrolyzed, soured water gets in the settling tank and proceeds anaerobic hydrolysis, and supernatant water gets into the biodynamic membrane reactor, decomposes and small particle size oil droplet and macromole are removed in the biological membrane assembly adsorption filtration at aerobic microbiological.
Chinese patent CN101367564 advanced treatment method for sewage water from oil production; Adopted for three steps carried out: one, sedimentation pre-treatment, dosing coagulant carry out coagulating sedimentation; Send into air flotation pool again and handle, filter through one-level individual layer quartz sand filtration device and secondary individual layer quartz sand filtration device successively then; Two, micro-filtration is handled: under 0.01～1 MPa pressure, carry out dead-end filtration at microfiltration equipment; Three, the depth type filtration of loop ultrafiltration film is handled, and every operation 1～8 hour is carried out the water recoil once, and every operation 8～48 hours is carried out an alkali backwash to ultra-filtration membrane equipment, and primary chemical cleaning was carried out in every operation in 5～20 days.
Chinese patent CN101671091 produced water for ultra-low permeable oil field reinjection treatment process, one, dosing coagulant or flotation agent carries out coagulating sedimentation and handle; Two, be 6～9 in supernatant pH value, temperature is that 15～40 ℃, salinity are that 4000～6000mg/L, suspended solids content are that 30～60mg/L, suspended solids particle size values are that 0.1～10 μ m, oleaginousness are that 30～150mg/L, CODCr feed active sludge-biomembrane reaction pond, hydraulic detention time 6～10h under the condition of 300～600mg/L; Three, the oil field extracted water after the step 2 processing is passed in the settling tank, carries out precipitation process, and then cross the ultra-filtration membrane of 0.001～0.02 μ m.
The pre-treatment of aforesaid method film because the singularity of oilfield produced waste water, all is difficult to reach and film is polluted drop to the minimally requirement, and reality is not seen the through engineering approaches report.Secondly, complex treatment process, the residence time is long, and investment and working cost are high.
Application goes into to have initiated to select associating obligate microorganism species to carry out oil removing and degradation of organic substances, has reached better membrane sepn pre-treatment effect, and for example formerly apply for a patent: method for treating water cut out is used in the re-injection of CN03112720.7 oil field; Adopt bacillus and utmost point Bacillaceae to form obligate associating flora; Degrade to greatest extent oil and organism have reduced subsequent film have been polluted, and make membrane sepn can continue to carry out; And obtained the practical engineering application success, and dropped into through engineering approaches and used.Obligate associating flora is a carrier through active sludge in this method; Yet the shortcoming that activated sludge process itself exists; Limited giving full play to of process advantage, for example: activated sludge process is prone to take place bias current and spoil disposal causes the loss of part mikrobe to influence treatment effect, thereby requires to have than Da Chi to hold; Secondly, adopt active sludge to make carrier, get in the back level ultrafiltration water separating membrane and contain a certain amount of active sludge; And sludge content and reaction tank sludge concentration are proportional, and the membrane sepn sludge concentration reaches 15-25g/l usually, and subsequent film is separated can only adopt the higher tubular membrane of price (for example internal diameter 8mm); Can not adopt smart filter type filtration treatment,, limit the further raising of pre-treatment sludge concentration for keeping higher membrane sepn efficient; Thereby limited the processing microbial biomass, and cause the entire treatment time still longer, do not comprise backflow; The residence time needs 5-10 hour, even longer.Besides, tubular ultra-filtration membrane adopts cross-flow to separate, and quantity of reflux causes separating energy consumption higher relatively up to 30-60%, for the 3-5 of membrane sepn usually doubly.And owing to the long residence time, big activated sludge tank, and expensive tubular membrane, cause investment cost high, take up an area of greatly working cost height (aeration rate is big, and film cross-flow separating energy consumption is higher).Therefore investment cost high (only film cost ton water is invested about 10,000 yuan/ton), to handle working cost high (the about 2.7-3.0 of ton water running expense unit), time length (5-10 hour) be three greatly still to need improvements.
Formerly apply for a patent CN200610096359.9 refinery water mikrobe advanced treatment, adopt BAF and/or biological reaction tank to carry to attach pseudomonas (Pseudomonassp), moving glue bacillus (Zoogloeasp.), Plesiomonas (Plesiomonassp.), Bacillus (Bacillus), bacillus megaterium (Bacillusmegaterium), ball Rhodopseudomonas (Rhodopseudomonasglobiformis) associating bacterium.Same degraded oil and organism obligate mikrobe mix same art breading, and above-mentioned deficiency still exists.
Formerly apply for a patent the CN200610096180.3 oil field re-injection water microbiological and handle, adopt bar-shaped bacillus cereus (Bacilluscereus), Bacillaceae (Corynebacteriumsp.), subtilis (Bacillussubtilis), Pseudomonas alcaligenes (Pseudomonasalcaligenes) associating bacterium aerobic biochemical to handle and follow-up filtration treatment.Same degraded oil and organism obligate mikrobe mix same art breading, and above-mentioned deficiency still exists.
Above-mentioned employing oil removing, degradation of organic substances obligate microbiological treatment; Also have a common deficiency, biological oil removing bacterium and degradation of organic substances bacterium are mixed in a process section, possibly be owing to do not act synergistically each other; Having limited the high efficiency of obligate mikrobe, also is to cause handling a long reason of the residence time.Above-mentioned deficiency still has is worth improved place.
Summary of the invention
The object of the invention is to overcome the deficiency of above-mentioned prior art, provides a kind of cost of investment to economize, and the residence time is short, handles the low hyposmosis/extra permeability oilfield oil extraction-generated waste water re-injection treatment process of working cost.
The object of the invention realizes; The main improvement is that degraded oil and organic pollutant obligate mikrobe are separated processed in sequence, and improves the mycoderm amount on the immobilization carrier through biological group is colonizated in, and reduces mud and produces; And increase water, bacterium contact; Improved film pre-treatment effect, not only reduced the pre-treatment residence time, and subsequent film is separated can adopt simply, tunica fibrosa or vacuum diaphragm or gas are carried good economy performance separatory membranes such as film or tympanum cheaply; Overcome the deficiency of prior art, realized the object of the invention.Specifically; Hyposmosis of the present invention/extra permeability oilfield oil extraction-generated waste water re-injection treatment process; Comprise and make treating water through aerobic obligate microbial association bacterium oil removing and degradable organic pollutant; And membrane sepn or smart the filtration; It is characterized in that obligate microbial association bacterium is for the oil removing being main moving glue Bacillaceae (Zoogloeasp), bacillus cereus (Bacillus cereus), Pseudomonas alcaligenes (Pseudomonasalcaligenes) combination bacterium respectively; With the short shape bacillus (Brachybacteriumcollins), Bacillus licheniformis (Bacillus licheniformis), subtilis (Bacillus subtilis), pseudomonas (Pseudomonas sp) the combination bacterium that with the degradable organic pollutant are the master; Be attached to packing density 65-85V/V% hanging filler in the Aerobic Pond respectively and/or separate the floating stuffing that is provided with, and Fillers for Biology Aerated Filtering Pool, processed in sequence; Separatory membrane is that the tunica fibrosa that satisfy to filter requires of aperture or vacuum diaphragm or gas are carried film or tympanum; Essence is filtered into silicon bath soil and filters.
Among the present invention:
With oil removing is the bio combined bacterium of main obligate; Mainly form by moving glue Bacillaceae (Zoogloea sp), bacillus cereus (Bacillus cereus), Pseudomonas alcaligenes (Pseudomonas alcaligenes); Its function is at first with oil degraded in the extraction sewage, the part macromole organic pollutant of also degrading simultaneously.For improving obligate biological bacteria amount and fully contacting with treating water, reduce mud and produce, adopt attached to being distributed in immobilization carrier surface based fashion in the pond, obligate flora and sewage are handled with the catalytic oxidation mode, get into the subsequent disposal sludge quantity thereby significantly reduce.Being distributed in immobilization carrier in the pond, can be hanging filler, also can be floating stuffing, and floating stuffing is separated, and mainly is to play uniform filling to distribute, and avoids causing filler in local accumulation because of flow.Volume density accounts for the pond and holds 65-85V/V%, is preferably 75-85V/V%, and high-density packing had both increased the microbial bacteria amount, packing density increases simultaneously, has also increased filler and contacting of disposing of sewage, and has reduced short stream.Said immobilization carrier, better for adopting hanging filler, for example there is filametntary cloth sheet structure (Fig. 3) on the surface; Perhaps combined semi soft-filler (Fig. 5), both both can use separately, also can mix use; Through being provided with at the treating pond middle-high density; Make hanging filler form a lot of " barrier ", can make disposes of sewage " stops " according to a lot of hanging filler barrier and between hanging filler, to form catadioptric stream, thereby has prolonged contacting of treating water and obligate microbial bacteria; Help making treating pond to form " the long flow field of Xiao Chi ", also help reducing treating pond and take up an area of.
Biological filter: be mainly used to degradation of organic substances pollutent and COD and minor amount of oil; Also has common biological filter function simultaneously; Hold back big suspended substance and alleviate the isolating load of subsequent film, separate for subsequent film and adopt economic tunica fibrosa or vacuum diaphragm or gas is carried film or tympanum lays the foundation.Filtrate adheres to carrier as obligate speck flora equally, fixedly the obligate microorganism species.With the degradable organic pollutant is that main associating flora mainly comprises short shape bacillus (Brachybacteriumcollins), Bacillus licheniformis (Bacilluslicheniformis), subtilis (Bacillus subtilis), pseudomonas (Pseudomonassp).Be to improve the duration of contact of treating water and biofilter material, and reduce the filter tank and take up an area of, a kind of being preferably is adopted as the internal recycle of the being with inner sleeve filter tank of turning back, and for example the applicant formerly applies for a patent the CN200620077234.7 flow process inner circulating aerating biological filtering tank of turning back.
Decomposing oil is that main contact-oxidation pool and degradation of organic substances is main biological aerated filter, and both residence time are relatively good to be 1.5-2.5: 1, and this residence time ratio has better treatment effect, and processing total time is the shortest.
The filtration requirement is satisfied in the separatory membrane aperture; Be meant that membrane sepn filters the back water outlet and satisfies hyposmosis/extra permeability oilfield re-injection water requirement; Suspended substance≤1mg/l for example, median particle size≤1 micron, oil≤5mg/l (or 1mg/l); Test is confirmed can satisfy this requirement about film mean pore size 100Nm (nanometer).And because the prime treatment effect is good, removed most oil and organism, suspended substance, thereby can adopt silicon bath soil to filter, water outlet can be satisfied hyposmosis/extra permeability oilfield re-injection requirement equally.
In addition, for keeping the high reactivity of filling surface microorganism species, the increase of a kind of filling surface is more fortunately carried to be attached with proteolytic enzyme (protease; Proteinase) be main organized enzyme.Can also add and help the general trace element of microorganism growth (for example potassium, sodium, phosphorus, magnesium, calcium, amino acid etc. belong to prior art, and the commercial chemicals preparation can be arranged).Their acting in conjunction: activating microorganisms, catalysis improve degradation rate to oil and organic pollutant degradation, shorten degradation time, and test shows filler after organized enzyme and micro-dip treating, can shorten and handle residence time 1/3-2/5.Filling carrier organized enzyme and micro-carrier band can pass through filler dip treating carrier band in advance, are made into liquid through standardization after use for some time and add, and for example add at water-in and replenish, and this also is a prior art.
Cause short stream for preventing that into water impacts, (for example middle part and turnover place) some vertical phase partitions can also be set in treating pond, the people produces the flow field of turning back for making to dispose of sewage, and increases to flow length prolongation treating water and mikrobe duration of contact.
Hyposmosis of the present invention/extra permeability oilfield oil extraction-generated waste water re-injection treatment process is with respect to prior art, according to the oilfield produced waste water characteristics; Handling oil and the degradation of organic substances associating flora strong according to sewage characteristic specific aim screening specificity, and separate processed in sequence (decomposing oil degradation of organic substances more earlier), have more specific aim and remove oil and degradation of organic substances; Degraded thoroughly; Improve the pre-treatment effect greatly, reduced to greatest extent separatory membrane is polluted, reduced the treatment process and the residence time; Secondly, at first catalytic oxidation artifact filter tank will be united flora and will be attached to suspension and/or floating stuffing respectively, and bio-filter stuffing; Both can make and handle flora big carrier band amount (high bacteria concentration) is arranged, simultaneously also for carrying the carrier carried organized enzyme of bacterium and promote the trace element of growth to provide convenience, and this technology collocation is not only can complementation not enough separately, and the technology complementarity is good; Biological contact degraded for example, not only the mud generation is few, removes most suspended substances and oil; Also alleviate follow-up biological filter loading, prolonged the filter tank cleaning interval, the artifact filter tank technique; The electricity charge, coefficient of oxygen utilization height, aeration rate is little, and energy consumption is low; Have biological degradation concurrently simultaneously and dual-use function is held back in filtration, it is low to go out water suspension, and the two cooperation is laid a good foundation for the economic separatory membrane of following adopted.Dividing plate is set in treating pond simultaneously, and adopts high-density to fill hanging filler, the not short stream of water can make treating water form the stream of turning back, and has improved the total amount that contacts of disposing of sewage with biological bacteria, and has improved the utilization ratio of oxygen, helps reducing aeration energy consumption.Technology of the present invention acts synergistically jointly, has than the better pre-treatment effect of prior art, and test shows that this combination process does not add any medicament; Preceding second-stage treatment can make Oilfield using water outlet (oil-containing 20～300mg/l, suspended substance 50～700mg/l, sulfide≤50mg/l; Salinity :≤150000mg/l) handling to suspended substance≤10mg/l, oil≤5mg/l handles residence time weak point and only needs 3-5 hour; And the mud quantum of output is few; Having only usually conduct method about 1/5, is original technology about 3/5, and for example treatment capacity is 3000m
3/ d, oil-containing 300mg/l, SS500mg/l, sludge yield are about 55kg/d (water ratio 75%), and the about 1.0 tons/d of former method sludge yield does not need otherwise processed can satisfy the mud discharging requirement, has also omitted sludge disposal technology, has improved the pre-treatment effect greatly.Because pre-treatment mud generation is few; Subsequent film is separated to adopt for example hollow-fibre membrane or vacuum diaphragm or the gas of conventional economical (relative low price) to carry film or tympanum etc. and separate and handle, not only separatory membrane is not had special selection requirement, reduced the film cost; And separation sewage sludge amount is few; Improved separation efficiency, only the recovery of water separating membrane can more formerly be applied for a patent and adopt tubular membrane to improve more than 20%, has reduced the membrane sepn energy consumption.Treatment process of the present invention has the short treatment time than prior art, little floor space, and investment and processing cost are low, and Theoretical Calculation is handled has only about 1/3 of former method with water yield film capital cost, and running cost also has only former method 1/3-1/5.The hyposmosis of the inventive method particularly suitable, extra permeability oilfield do not contain polymer produced WWT and are used for re-injection.
Below in conjunction with several specific embodiments and Comparative Examples; Essence of the present invention is further understood in exemplary illustration and help; But the embodiment detail only is in order the present invention to be described, not to represent the present invention to conceive whole technical schemes down, therefore should not be construed as the total technical scheme of the present invention to be limited; Some are In the view of the technician; The unsubstantiality that does not depart from the present invention's design increases and/or change, and for example simple the change or replacement of technical characterictic to have same or similar technique effect all belongs to protection domain of the present invention.
Description of drawings
Fig. 1 is a flow processing process flow diagram of the present invention.
Fig. 2 has fiber yarn cloth sheet hanging filler structural representation for the present invention with the surface.
Fig. 3 is Fig. 2 side-looking structural representation.
Fig. 4 for the present invention with the soft hanging filler structural representation of another kind of combined semi.
Fig. 5 is Fig. 4 cross section structure synoptic diagram.
Embodiment
Embodiment 1: referring to Fig. 2-5, catalytic oxidation of the present invention has fiber yarn cloth sheet hanging filler with the surface, is made up of the fiber yarn 1 that synthetic fiber cloth sheet 2 and two sides are uniformly distributed with; The soft hanging filler of combined semi is formed sheet structure by middle plastic clip loop 4 with the equally distributed fiber yarn 3 and 6 of interior periphery, by axial cord 5 alternate composing in series.Both all have relative higher density, help improving the duration of contact of treating water and filler, prevent short stream.
2: intake to a jar water outlet falls in certain oil field sewage index (MV): oil-containing 300 mg/l, SS565 mg/l.Adopt technology of the present invention, mikrobe catalytic oxidation+biological aerated filter+membrane sepn (mean pore size 100 Nm).Wherein contact oxidation pond filler adopts routine 1 surface that fiber yarn cloth sheet hanging filler is arranged, and filler is tamped density 80V/V% in the pond.Microbial bacteria does; Moving glue Bacillaceae (Zoogloea sp), bacillus cereus (Bacillus cereus), Pseudomonas alcaligenes (Pseudomonas alcaligenes) combination bacterium.Biological aerated filter adopts the applicant formerly to apply for a patent CN200620077234.7 to have the turn back BAF of flow process of internal recycle, and filter material surface carries bacterium and is: short shape bacillus (Brachybacteriumcollins), Bacillus licheniformis (Bacillus licheniformis), subtilis (Bacillus subtilis), pseudomonas (Pseudomonas sp) combination bacterium.All to adopt with proteolytic enzyme be to put into after the micro-dip treating such as main organized enzyme and potassium, sodium, phosphorus, magnesium, calcium, amino acid for hanging filler and filter tank filler in addition.Membrane sepn adopts common hollow fiber ultrafiltration membrane.3.5 hours bio-contact oxidation treatment times, GWR 10.5:1, treat effluent oil-containing 4.5mg/l, SS20mg/l; Turn back and flow 1.5 hours (the total time spent 5h of preceding secondary) of biological filter processing, handled debugging cycle 7 days, ton water consumption 1kw, treat effluent oil-containing 1.5mg/l, SS6.5mg/l.Contact-oxidation pool is 2:1 with biological aerated filter residence time ratio.Behind secondary pre-treatment oil removing, the degradation of organic substances, get into the smart filtering separation of hollow fiber ultrafiltration membrane, water outlet does not detect oil, SS0.65mg/l, and median particle size≤0.82 μ m, wherein hollow fiber ultrafiltration membrane was cleaned once (0.05 yuan of/ton water of expense) in every month.Water ratio 75% mud quantum of output 0.15kg/m
3. sewage has reached the environment protection emission requirement, not otherwise processed.
Embodiment 3: basically with embodiment 2; Wherein the catalytic oxidation filler adopts the soft hanging filler of routine 1 combined semi, alternately in the reaction tank is provided with vertical dividing plate, and wherein filler and filtrate do not use proteolytic enzyme to be micro-dip treating such as main organized enzyme and potassium, sodium, phosphorus, magnesium, calcium, amino acid; Just treatment time example 2 prolongations relatively; Be 5+3h, add up to 8h, result is basic with example 2.
Comparative example 1: adopt original conventional treatment process---slurry tank water outlet → hydrocyclone → coalescence degreaser → walnut shell filter → sterilization → coarse filtration → essence is filtered the two-stage filtration technical process.Dispose of sewage with example 2.Treat effluent oil-containing 5.6mg/l, SS13mg/l, median particle size 3.2 μ m, overall treatment time＞8 hour.Wherein to the walnut shell filter water outlet, oil-containing 68mg/l, SS25mg/l, filtrate cleans 1-2 time every day.Smart filter core or the every two weeks of filtrate are changed 1 time, and the mud generation is big, needs subsequent disposal; Cleaning Wastewater is also answered otherwise processed.If filtrate is reduced wash number or reduces replacing, then water outlet is not up to standard.
Comparative example 2: adopting process is for formerly applying for a patent 03112720.7 method, and promptly the tubular membrane of active sludge biological reaction+microbial bacteria+internal diameter >=8mm is disposed of sewage with example 2.The about 18000mg/l of reaction tank sludge concentration, GWR 30: 1 was handled debugging cycle about 15 days, ton water consumption 4-5kw, active sludge biological reaction times 10h, water outlet oil-contg 5.2mg/l.Tubular membrane is separated water outlet, oil-contg 0.3mg/l, and SS0.75mg/l, median particle size≤0.82 μ m, 3 months tubular membrane cleaning intervaies, the more preceding method of sludge quantity is few, water ratio 75% mud 0.15kg/m
3. sewage has reached the environment protection emission requirement, not otherwise processed.
To those skilled in the art, under this patent design and specific embodiment enlightenment, some distortion that can directly derive or associate from this patent disclosure and general knowledge; Those of ordinary skills will recognize also can adopt additive method, or uses substituting of known technology in the prior art always, and the equivalence of characteristic changes or modification; Mutual various combination between characteristic, the for example change of separatory membrane is adopted silicon bath soil to filter and is replaced membrane sepn; With separating floating stuffing replacement hanging filler is set; Or the like unsubstantiality change, can be employed equally, can both realize this patent representation function and effect; Launch for example no longer one by one to describe in detail, all belong to this patent protection domain.
Claims (8)
1. hyposmosis/extra permeability oilfield oil extraction-generated waste water re-injection treatment process; Comprise and make treating water through aerobic obligate microbial association bacterium oil removing and degradable organic pollutant; And membrane sepn or smart the filtration; It is characterized in that obligate microbial association bacterium is for the oil removing being main moving glue Bacillaceae (Zoogloea sp), bacillus cereus (Bacillus cereus), Pseudomonas alcaligenes (Pseudomonas alcaligenes) combination bacterium respectively; With the short shape bacillus (Brachybacterium collins), Bacillus licheniformis (Bacillus licheniformis), subtilis (Bacillus subtilis), pseudomonas (Pseudomonas sp) the combination bacterium that with the degradable organic pollutant are the master; Be attached to packing density 65-85V/V% hanging filler in the Aerobic Pond respectively and/or separate the floating stuffing that is provided with; And Fillers for Biology Aerated Filtering Pool, processed in sequence; Separatory membrane is that the tunica fibrosa that satisfy to filter requires of aperture or vacuum diaphragm or gas are carried film or tympanum; Essence is filtered into diatomite filtration.
2. according to the said hyposmosis of claim 1/extra permeability oilfield oil extraction-generated waste water re-injection treatment process, it is characterized in that filler packing density 75-85V/V%.
3. according to the said hyposmosis of claim 1/extra permeability oilfield oil extraction-generated waste water re-injection treatment process, it is characterized in that vertical phase partition is arranged in the Aerobic Pond.
4. according to the said hyposmosis of claim 1/extra permeability oilfield oil extraction-generated waste water re-injection treatment process, it is characterized in that biological aerated filter is the internal recycle of band inner sleeve or the flap filter tank of turning back.
5. according to the said hyposmosis of claim 1/extra permeability oilfield oil extraction-generated waste water re-injection treatment process, it is characterized in that filling surface carries with the organized enzyme that with proteolytic enzyme is the master, and help the microorganism growth trace element.
6. according to the said hyposmosis of claim 1/extra permeability oilfield oil extraction-generated waste water re-injection treatment process, it is characterized in that tunica fibrosa or vacuum diaphragm or gas carries about film or tympanum mean pore size 100Nm (nanometer).
7. according to the said hyposmosis of claim 1/extra permeability oilfield oil extraction-generated waste water re-injection treatment process, it is characterized in that Aerobic Pond and biological aerated filter residence time ratio are 1.5-2.5:1.
8. according to claim 1,2,3,4,5,6 or 7 said hyposmosis/extra permeability oilfield oil extraction-generated waste water re-injection treatment process, it is characterized in that hanging filler is that the surface has filametntary cloth sheet and/or combined semi soft-filler.
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| CN102372403B (en) * | 2011-10-11 | 2013-06-12 | 中国石油化工股份有限公司 | Treatment process of oil-containing sewage in low-permeability oil field |
| CN103693803A (en) * | 2013-09-23 | 2014-04-02 | 江苏博大环保股份有限公司 | Treatment method of oil field re-injection produced water and system thereof |
| CN103693814A (en) * | 2013-12-26 | 2014-04-02 | 天津市工业微生物研究所 | Method for treating tertiary oil recovery wastewater by combining efficient dominant bacteria and flocculent precipitate |
| CN106116054A (en) * | 2016-08-17 | 2016-11-16 | 谭嘉伟 | Track traffic integrated wastewater processes and reclaiming system |
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