CN104556544A - Method for producing biodiesel by treating oilfield sewage and fixing CO2 by virtue of microalgae - Google Patents
Method for producing biodiesel by treating oilfield sewage and fixing CO2 by virtue of microalgae Download PDFInfo
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- CN104556544A CN104556544A CN201310518854.4A CN201310518854A CN104556544A CN 104556544 A CN104556544 A CN 104556544A CN 201310518854 A CN201310518854 A CN 201310518854A CN 104556544 A CN104556544 A CN 104556544A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2/00—Production of liquid hydrocarbon mixtures of undefined composition from oxides of carbon
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
- C02F3/322—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae use of algae
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Abstract
The invention provides a method for producing biodiesel by treating oilfield sewage and fixing CO2 by virtue of microalgae. The method comprises the following steps: (a) firstly carrying out biological oil-removal pretreatment on the oilfield sewage of an oilfield sewage combination station by virtue of cavitation air floatation, feeding the oilfield sewage in which most crude oil is removed by virtue of the cavitation air floatation into an anaerobic biologic oil-removal pretreatment system to further remove the crude oil, and adding nutritive salts N and P in an anaerobic biologic oil-removal process in a weight part ratio of TOC to N to P of 100 to (5-10) to 1, wherein the crude oil in the oilfield sewage after the aerobic biological treatment is lower than 2mg/L; (b) directly flowing the oilfield sewage processed in the step (a) into a track type microalgae culture system, supplying flue gas in which the content of CO2 is 3%-15%, adding microalgae seeds into the track type microalgae culture system, and growing for 5-15 days; and (c) carrying out ultrafiltration on the oilfield sewage processed by the track type microalgae culture system in the step (b) by virtue of an ultrafiltration membrane in a cross flow filtration manner, collecting the microalgae, pressing algae mud into algae cakes by virtue of a pressure filter, feeding the algae cakes to a biodiesel preparation procedure, and after carrying out sterilization and deoxygenation on clean water produced by virtue of the ultrafiltration, reinjecting the clean water into low-permeability or ultra-low-permeability oil deposit stratums to repel oil.
Description
Technical field
The invention belongs to disposing polluted water in oil and newborn substance energy field, particularly one utilizes micro-algae process oilfield sewage and fixation of C O
2the method of biofuel processed.
Background technology
Greenhouse effect are maximum environmental problems that 21st century universe faces.Industrial development causes a large amount of CO
2be discharged in air, only have sorption enhanced CO to greatest extent
2just can coordinate problem between Economic development and environment.Current CO
2fixing emission-reduction technology can be divided into physical treatment, chemical treatment and biological fixation three class.In wherein biological fixation method, micro-algae under photosynthesis, can utilize CO
2synthesize a large amount of biological substances, as protein, starch, VITAMIN and lipid.And micro-algae has that photosynthetic rate is high, breeding is fast, environmental compatibility is strong, processing efficiency is high and easily and the advantage such as other engineering is integrated, can be applicable to CO
2fixing.
In order to realize micro-algae CO of industrialization
2fixing, lot of domestic and foreign enterprises and research institution have carried out many good tries.As far back as nineteen ninety, Japan internationality trade and the Department of Industry just once subsidized the project that a key name is " plan of earth research update method ", and the carbonic acid gas utilizing micro-algae to absorb in the flue gas of fuel-burning power plant carrys out production biomass energy.The research institution of the total about 20 Duo Ge private companys of this plan and government participates in, investment about 2,500,000,000 dollars altogether between 10 years, and reducing discharging, the work in Strain selection, photosynthesis physiological target exploitation, microalgae biomass Energy production etc. is all fruitful; Green fuel technology company of the U.S. (GreenFuel) and Arizona Public Service Company reduce discharging project in micro-algae that in December, 2007 carries out in the Spain west and south, utilize the CO in the industrial gaseous waste of cement mill
2carry out microdisk electrode and develop the food of high added value, feed and fuel, current built vertical 100m
2cultivation greenhouse carry out microdisk electrode with vertical thin-film bioreactor, and plan expand 1000m to
2scale; American UOP company obtains the subsidy of USDOE 1,500,000 dollars in March, 2010, carries out and traps CO by micro algae growth
2and for the production of the system verification of biofuel and the energy, the flue gas of the manufacturing installation discharge being arranged in Virginia Hopewell from Honeywell Inc. is trapped CO by this system
2, then from the micro-algae cultivated, extract biofuel, micro-algae residue then changes into pyrolysis oil for electric regenerative; Industrial gasses giant Linde of Germany and Algenol Biofuels LLC company of the U.S., also in a kind of technology catching, store, transport and supply carbonic acid gas of cooperative development in 2010, are applied to Algenol and produce the third generation (3G) biofuel.This patented technology that the said firm has utilizes in carbonic acid gas, seawater and algae bio to extract biofuel.AlgaeLink NV company is one of bellwether of European alternative fuel industry, in the end of the year 2007, announce to develop first patent marine alga photo-bioreactor system (photobioreactor systems for algae) made without prefabricated pipe manufacture but with special UV protection transparent sheet in the world.This photoreaction system can auto-folder takes in sturdy and durable a, diameter is easily in the round tube of 64cm, and this pipe can be automatically tight by water seal.Apply this technology, the cost of transportation will reduce 90%.AlgaeLink NV company, in 3 years of exploitation technique, also all achieves great progress in the research of algae science, micro-algae production system design operation etc.
Micro-algae is utilized to carry out CO
2although fixing reduction of discharging of gas reaches its maturity in theory, also have numerous enterprises and mechanism also all to carry out good try, really will realize mass-producing application and still have many difficulties, one of reason is that cost is too high.So micro-algae CO
2the development trend that gas fixes emission-reduction technology is micro-algae CO
2the fixing reduction of discharging of gas and the coupling of the other technologies such as biofuel, wastewater treatment get up to fully utilize, while other high value added products of acquisition, reduce cost.
Summary of the invention
The object of this invention is to provide one and utilize micro-algae process oilfield sewage and fixation of C O
2the method of biofuel processed, solid for micro-algae carbon biofuel is combined with oil field recharged waste water process, by utilizing the micro-algae of the fish-farming with sewage after biological oil removing process, gathering of micro-algae and oilfield sewage advanced treatment is realized by adopting hyperfiltration process, again after sterilization, deoxidation for hyposmosis provides qualified return water, realize disposing polluted water in oil, CO
2fixing and preparing biological diesel oil coupling fully utilizes, and effectively reduces production cost.
Object of the present invention realizes by following technical measures:
The method utilizes biological process and micro-algae process oilfield sewage, absorbs fixation of C O
2with preparing biological diesel oil coupling processing, carry out as follows:
A, first cavitation air flotation is utilized to carry out biological oil removing pre-treatment to oilfield sewage joint station oilfield sewage, enter aerobe oil removal treatment system through the air supporting oilfield sewage removed after most of crude oil and remove crude oil further, add by TOC:N:P=100:5-10: 1 weight in aerobe oil removal process and add N, P nutritive salt, the crude oil contained in oilfield sewage after Aerobic biological process is lower than 2mg/L;
Flow directly into racing track formula microalgae culture system in b, a step oilfield sewage after treatment, then pass into CO
2content is the stack gas of 3%-15%, adds algae algae kind in a subtle way in racing track formula microalgae culture system, and this micro-algae, through growth in 3-15 days, grows to density 10
7/ more than ml, and oil and fat content more than 20%;
C, ultrafiltration system is sent by the oilfield sewage of b step after the process of racing track formula microalgae culture system to adopt ultra-filtration membrane with the ultrafiltration of cross flow filter mode, collect micro-algae, make algal biscuit after the press filtration of algae mud pressure filter and send preparing biological diesel oil operation, ultrafiltration is produced clean water after sterilization, deoxidation, is recycled into hyposmosis or the displacement of reservoir oil of extra-low-permeability reservoir stratum.
The screening of sterilant is carried out according to " oil-field flooding water conditioning sterilant buying regulation " SY/T6007-94, and the evaluation of sterilant is carried out according to the test method specified in " Performance Valuation of Bactericides method " SY/T5890-93.Deoxidation treatment is carried out according to the regulation of " oil-field flooding deoxidation design specifications standard " S/T0046-1999.
Object of the present invention also realizes by following technical measures:
Cross-flow rate described in above-mentioned step c is 10%-30%, and namely the micro-algae concentrated solution of volume ratio accounts for 10%-30%, is separated clean water and accounts for 70%-90%; Add by TOC:N:P=100:7-8: 1 weight in aerobe oil removal process described in a step and add N, P nutritive salt.
The present invention has following beneficial effect:
The present invention organically combines solid for micro-algae carbon biofuel and oil field recharged waste water process, gathering of micro-algae and oilfield sewage advanced treatment is realized with employing hyperfiltration process by the micro-algae of fish-farming with sewage after utilizing biological oil removing process, and then for hyposmosis provides qualified return water after sterilization, deoxidation, realize disposing polluted water in oil, CO
2fixing and preparing biological diesel oil coupling fully utilizes.Reduce cost, change evil for precious, there is significant economic and social benefit.
accompanying drawing illustrates:
Fig. 1 is schematic flow sheet of the present invention.
Embodiment:
The present invention utilizes biological process and micro-algae process oilfield sewage, absorption fixation of C O
2with the method for preparing biological diesel oil coupling processing.
Embodiment 1:
A, first cavitation air flotation is utilized to carry out biological oil removing pre-treatment to oilfield sewage joint station oilfield sewage, enter aerobe oil removal treatment system through the air supporting oilfield sewage removed after most of crude oil and remove crude oil further, add N, P nutritive salt by TOC:N:P=100:5:1 weight in aerobe oil removal process, the crude oil contained in oilfield sewage after Aerobic biological process is lower than 2mg/L;
Racing track formula microalgae culture system is flowed directly into, by CO in b, a step oilfield sewage after treatment
2content be 15% stack gas be directly filled with racing track formula microalgae culture system by inflation system, for micro algae growth provides carbon source, add in racing track formula microalgae culture system can after aerobe oil removing well-grown in oilfield sewage, have the high algae strain containing grease, high resistance to cold and diseases, inoculum density is 10
5individual/ml time, through 5 days growth, grow to density 10
7/ more than ml, and micro-algae of oil and fat content more than 20%; Algae strain utilizes CO in N, P nutritive salt remaining in oilfield sewage and stack gas
2grow, realize oilfield sewage purification and CO
2fixing;
C, ultrafiltration system is sent by the oilfield sewage of b step after the process of racing track formula microalgae culture system to adopt ultra-filtration membrane with the ultrafiltration of cross flow filter mode, cross-flow rate is 10%, collect micro-algae, make algal biscuit after the press filtration of algae mud pressure filter and send preparing biological diesel oil operation, ultrafiltration is produced clean water after sterilization, deoxidation, is recycled into hyposmosis or the displacement of reservoir oil of extra-low-permeability reservoir stratum.
Embodiment 2:
A, first cavitation air flotation is utilized to carry out biological oil removing pre-treatment to oilfield sewage joint station oilfield sewage, enter aerobe oil removal treatment system through the air supporting oilfield sewage removed after most of crude oil and remove crude oil further, add N, P nutritive salt by TOC:N:P=100:10: 1 weight in aerobe oil removal process, the crude oil contained in oilfield sewage after Aerobic biological process is lower than 2mg/L;
Racing track formula microalgae culture system is flowed directly into, by CO in b, a step oilfield sewage after treatment
2content be 3% stack gas be directly filled with racing track formula microalgae culture system by inflation system, for micro algae growth provides carbon source, add in racing track formula microalgae culture system can after aerobe oil removing well-grown in oilfield sewage, have the high algae strain containing grease, high resistance to cold and diseases, inoculum density is 10
5individual/ml time, through 15 days growth, grow to density 10
7/ more than ml, and micro-algae of oil and fat content more than 20%; Algae strain utilizes CO in N, P nutritive salt remaining in oilfield sewage and stack gas
2grow, realize oilfield sewage purification and CO
2fixing;
C, adopt ultra-filtration membrane with the ultrafiltration of cross flow filter mode the oilfield sewage ultrafiltration system of b step after the process of racing track formula microalgae culture system, cross-flow rate is 30%, collect micro-algae, make algal biscuit after the press filtration of algae mud pressure filter and send preparing biological diesel oil operation, ultrafiltration is produced clean water after sterilization, deoxidation, is recycled into hyposmosis or the displacement of reservoir oil of extra-low-permeability reservoir stratum.
Embodiment 3:
A, first cavitation air flotation is utilized to carry out biological oil removing pre-treatment to oilfield sewage joint station oilfield sewage, enter aerobe oil removal treatment system through the air supporting oilfield sewage removed after most of crude oil and remove crude oil further, add N, P nutritive salt by TOC:N:P=100:7:1 weight in aerobe oil removal process, the crude oil contained in oilfield sewage after Aerobic biological process is lower than 2mg/L;
Racing track formula microalgae culture system is flowed directly into, by CO in b, a step oilfield sewage after treatment
2content be 10% stack gas be directly filled with racing track formula microalgae culture system by inflation system, for micro algae growth provides carbon source, add in racing track formula microalgae culture system can after aerobe oil removing well-grown in oilfield sewage, have the high algae strain containing grease, high resistance to cold and diseases, inoculum density is 10
5individual/ml time, through 8 days growth, grow to density 10
7/ more than ml, and micro-algae of oil and fat content more than 20%; Algae strain utilizes CO in N, P nutritive salt remaining in oilfield sewage and stack gas
2grow, realize oilfield sewage purification and CO
2fixing;
C, adopt ultra-filtration membrane with the ultrafiltration of cross flow filter mode the oilfield sewage ultrafiltration system of b step after the process of racing track formula microalgae culture system, cross-flow rate is 20%, collect micro-algae, make algal biscuit after the press filtration of algae mud pressure filter and send preparing biological diesel oil operation, ultrafiltration is produced clean water after sterilization, deoxidation, is recycled into hyposmosis or the displacement of reservoir oil of extra-low-permeability reservoir stratum.
Embodiment 4:
A, first cavitation air flotation is utilized to carry out biological oil removing pre-treatment to oilfield sewage joint station oilfield sewage, enter aerobe oil removal treatment system through the air supporting oilfield sewage removed after most of crude oil and remove crude oil further, add N, P nutritive salt by TOC:N:P=100:8:1 weight in aerobe oil removal process, the crude oil contained in oilfield sewage after Aerobic biological process is lower than 2mg/L;
Racing track formula microalgae culture system is flowed directly into, by CO in b, a step oilfield sewage after treatment
2content be 10% stack gas be directly filled with racing track formula microalgae culture system by inflation system, for micro algae growth provides carbon source, add in racing track formula microalgae culture system can after aerobe oil removing well-grown in oilfield sewage, have the high algae strain containing grease, high resistance to cold and diseases, inoculum density is 10
5individual/ml time, through 10 days growth, grow to density 10
7/ more than ml, and micro-algae of oil and fat content more than 20%; Algae strain utilizes CO in N, P nutritive salt remaining in oilfield sewage and stack gas
2grow, realize oilfield sewage purification and CO
2fixing;
C, adopt ultra-filtration membrane with the ultrafiltration of cross flow filter mode the oilfield sewage ultrafiltration system of b step after the process of racing track formula microalgae culture system, cross-flow rate is 15%, collect micro-algae, make algal biscuit after the press filtration of algae mud pressure filter and send preparing biological diesel oil operation, ultrafiltration is produced clean water after sterilization, deoxidation, is recycled into hyposmosis or the displacement of reservoir oil of extra-low-permeability reservoir stratum.
Technical scheme described in this embodiment has more superior positively effect, by test and Data Comparison, is realizing disposing polluted water in oil, CO
2while fixing and preparing biological diesel oil coupling fully utilizes, production cost is minimum.
Claims (3)
1. one kind utilizes micro-algae process oilfield sewage and fixation of C O
2the method of biofuel processed, is characterized in that the method is carried out as follows:
A, first cavitation air flotation is utilized to carry out biological oil removing pre-treatment to oilfield sewage joint station oilfield sewage, enter aerobe oil removal treatment system through the air supporting oilfield sewage removed after most of crude oil and remove crude oil further, add N, P nutritive salt in aerobe oil removal process, the crude oil contained in oilfield sewage after Aerobic biological process is lower than 2mg/L;
Flow directly into racing track formula microalgae culture system in b, a step oilfield sewage after treatment, then pass into CO
2content is the stack gas of 3%-15%, adds algae algae kind in a subtle way in racing track formula microalgae culture system, and this micro-algae, through growth in 3-15 days, grows to density 10
7/ more than ml, and oil and fat content more than 20%;
C, ultrafiltration system is sent by the oilfield sewage of b step after the process of racing track formula microalgae culture system to adopt ultra-filtration membrane with the ultrafiltration of cross flow filter mode, collect micro-algae, make algal biscuit after the press filtration of algae mud pressure filter and send preparing biological diesel oil operation, ultrafiltration is produced clean water after sterilization, deoxidation, is recycled into hyposmosis or the displacement of reservoir oil of extra-low-permeability reservoir stratum.
2. the one process oilfield sewage according to right 1 and fixation of C O
2method, it is characterized in that the cross-flow rate described in step c is 10%-30%.
3. the one according to right 1 utilizes micro-algae process oilfield sewage and fixation of C O
2the method of biofuel processed, is characterized in that adding N, P nutritive salt by TOC:N:P=100:5-10: 1 weight in the aerobe oil removal process described in a step.
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Cited By (4)
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| CN110066736A (en) * | 2018-01-23 | 2019-07-30 | 中国石油化工股份有限公司 | The method and system of Cyclic culture microalgae |
| CN110467313A (en) * | 2019-08-13 | 2019-11-19 | 上海海洋大学 | A kind of vessel sewage exhaust-gas treatment energy-saving and emission-reduction system based on immobilized microalgae |
| CN111056650A (en) * | 2018-10-17 | 2020-04-24 | 中国石油化工股份有限公司 | Method for treating carbon dioxide flooding oilfield produced water |
| CN111072215A (en) * | 2018-10-18 | 2020-04-28 | 中国石油化工股份有限公司 | Terephthalic acid wastewater treatment and resource utilization method |
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| CN110467313A (en) * | 2019-08-13 | 2019-11-19 | 上海海洋大学 | A kind of vessel sewage exhaust-gas treatment energy-saving and emission-reduction system based on immobilized microalgae |
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