EP1765973A1 - Device for algae production - Google Patents

Device for algae production

Info

Publication number
EP1765973A1
EP1765973A1 EP05752394A EP05752394A EP1765973A1 EP 1765973 A1 EP1765973 A1 EP 1765973A1 EP 05752394 A EP05752394 A EP 05752394A EP 05752394 A EP05752394 A EP 05752394A EP 1765973 A1 EP1765973 A1 EP 1765973A1
Authority
EP
European Patent Office
Prior art keywords
gas
algae
sheet
pipe
manifold
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05752394A
Other languages
German (de)
French (fr)
Inventor
Leif M. Mortensen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MicroA AS
Original Assignee
Prisforsk Partners AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Prisforsk Partners AS filed Critical Prisforsk Partners AS
Publication of EP1765973A1 publication Critical patent/EP1765973A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G33/00—Cultivation of seaweed or algae
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M21/00—Bioreactors or fermenters specially adapted for specific uses
    • C12M21/02—Photobioreactors
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M23/00—Constructional details, e.g. recesses, hinges
    • C12M23/02—Form or structure of the vessel
    • C12M23/06—Tubular
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M23/00—Constructional details, e.g. recesses, hinges
    • C12M23/02—Form or structure of the vessel
    • C12M23/14—Bags
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M23/00—Constructional details, e.g. recesses, hinges
    • C12M23/48—Holding appliances; Racks; Supports
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M23/00—Constructional details, e.g. recesses, hinges
    • C12M23/56—Floating elements
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
    • C12M41/30—Means for regulation, monitoring, measurement or control, e.g. flow regulation of concentration
    • C12M41/34—Means for regulation, monitoring, measurement or control, e.g. flow regulation of concentration of gas
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management

Definitions

  • This invention relates to a method for algae production. More particularly, it concerns a method, in which gases are circulated through a container filled at least partly with liquid, the container being designed to exhibit growth- promoting features, for example by being transparent.
  • the method is equally suitable for the production of so-called micro-algae both on land and in the sea.
  • the invention also includes a device for practising the method.
  • micro-algae for feeds is constantly increasing in aquaculture, as health food for human beings and as a feed supplement for animals.
  • aquaculture micro-algae are used directly or indirectly as feed for fish and shells.
  • cod fry micro-algae for a period, in which the cod fry is particularly sensitive to environmental conditions.
  • Shell production also appears to be a trade, which will have a need for feed of this kind.
  • poultry production micro-algae are already used as a feed supplement.
  • micro-algae are used for a number of purposes in research and industrial activities. According to the prior art micro-algae are produced in transparent pipes and containers, which are placed in buildings resembling greenhouses.
  • US patent 5534417 thus discloses a method for producing micro-algae, in which the micro-algae are placed in pockets made of plastic material, and in which gas is bubbled into the pockets .
  • Carbon dioxide, C0 2 is an important ingredient in the nutrient supply of micro-algae, and C0 2 is, therefore, mixed into air before being bubbled into the pockets. However, only a minor part of the C0 2 bubbled in is picked up by the algae in the pocket. The excess C0 2 flows out into the atmosphere. This, according to the prior art, common practice involves a cost-driving and unnecessary waste of C0 2 .
  • the invention has as its object to remedy the drawbacks of the prior art.
  • a gas mixture comprising oxygen, 0 2 and carbon dioxide, C0 2 .
  • the C0 2 that is not absorbed by algae in the growth containers is extracted into a gas-conditioning apparatus, which is arranged, among other things, to adjust the portion of C0 2 in the circulating gas before the gas is directed into the growth containers again.
  • the circulating gas mixture is also adjusted with respect to 0 2 in order to ensure that the 0 2 -level does not exceed values critical to the micro-algae.
  • the containers are made of a double plastic sheet, in which the two sheet layers are welded together along their peripheral edges and along parallel lines, so that the sheet layers form a sheet bag.
  • the welding together along the parallel lines is terminated, at the end portions of the lines, at a distance from the edge weld of the sheet.
  • the spaces between the parallel welding lines thus communicate with each other at their end portions .
  • a pipe for the supply and drainage of liquid is connected to the sheet bag.
  • Said sheet bag may with advantage be provided with further sheet layers, in which, for example, a fluid may be circulated for temperature adjustment of the liquid in the growth containers, or the light spectrum for the algae may be adjusted by means of a fluid present between adjacent sheet layers .
  • the welded-together sheet bag is placed to float horizontally in the water surface.
  • a perforated supply channel for gas is arranged along each growth container in the lower portion of the growth container. Gas is drawn off from the gas-filled upper portion of the gas container.
  • the method and the device according to the invention provide for large-scale production of algae, in which the investment and operating costs are relatively modest compared with those of the prior art .
  • Figure 1 shows a side view of a sheet bag connected to a gas-conditioning apparatus
  • Figure 2 shows a section I-I of Figure 1
  • Figure 3 shows a section corresponding to that of Figure 2 , the sheet bag being provided with further sheet layers ;
  • Figure 4 shows a side view of a sheet bag which is placed in the water surface;
  • Figure 5 shows a section IV-IV of the sheet bag of Figure 4.
  • the reference numeral 1 denotes a sheet bag including a first sheet 2 and a second sheet 4.
  • the sheets 2 and 4 are welded together along their peripheral edges 6 and along parallel lines 8.
  • the welds along the parallel lines 8 are terminated at a distance from the peripheral edge 6.
  • the sheet bag 1 is kept in an essentially vertical position by means of suspension hooks 10 complementarily fitting into suspension openings 12 in a mounting portion 14 of the sheet bag 1.
  • a first manifold 16 is formed in the upper portion of the sheet bag 1 in the region above the parallel weld lines 8 and is defined by the peripheral edge 6.
  • a second manifold 18 is formed in the lower portion of the sheet bag.
  • a first pipe 20 is connected via a valve 22 to the second manifold 18.
  • a gas-conditioning apparatus 24 communicates with the first manifold 16 by means of a second pipe 26, and with a perforated pipe 28, which is located in the second manifold 18, via a third pipe 30.
  • the perforated pipe 28 extends in the longitudinal direction of the second manifold 18.
  • the sheet bag 1 is filled with fluid containing, among other things, algae, via the valve 22 and the first pipe 20 up to a level 32.
  • the spaces between the parallel lines 8 and between the parallel lines 8 and the vertical parts of the peripheral edge 6 now form growth containers 34, see Figure 2.
  • Gas which has been corrected to the desired content of 0 2 and C0 2 and possibly other gases, flows from the gas- conditioning apparatus 24 via the third pipe 30 to the perforated pipe 28, from which the gas bubbles up through the growth containers 34.
  • the growth containers 34 together with the first manifold 16, the second manifold 18, the gas-conditioning apparatus 24, a second pipe 26, a third pipe 30 and the perforated pipe 28 form a circulation circuit.
  • the sheet bag 1 is provided with further sheet layers 36, 38 arranged for the circulation of temperature- and colour-adjusting fluid.
  • the sheet bag 1 is disposed floating in a water surface 40.
  • perforated pipes 28 are fitted along the lower portion of each growth container 34. The gas flows from the perforated pipe 28 through the water in the growth container 34 up to a gas pocket 42, from where the gas flows out through the second pipe 26.
  • the elements 20, 26, 28 and 30 are referred to as pipes, but may be formed in the practical embodiment by, for example, integrated channels in the sheet bag, hoses or other hollow elements .

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Zoology (AREA)
  • Genetics & Genomics (AREA)
  • Biotechnology (AREA)
  • Biomedical Technology (AREA)
  • Microbiology (AREA)
  • Biochemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Sustainable Development (AREA)
  • Clinical Laboratory Science (AREA)
  • Analytical Chemistry (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Environmental Sciences (AREA)
  • Molecular Biology (AREA)
  • Cultivation Of Seaweed (AREA)

Abstract

A device for algae production, in which a fluid comprising algae is located in growth containers (34), to which a gas containing CO2 is supplied, the gas being circulated through the gas containers (34) via a gas-conditioning apparatus (24).

Description

A device for algae production
This invention relates to a method for algae production. More particularly, it concerns a method, in which gases are circulated through a container filled at least partly with liquid, the container being designed to exhibit growth- promoting features, for example by being transparent. The method is equally suitable for the production of so-called micro-algae both on land and in the sea. The invention also includes a device for practising the method.
The need for micro-algae for feeds is constantly increasing in aquaculture, as health food for human beings and as a feed supplement for animals. In aquaculture micro-algae are used directly or indirectly as feed for fish and shells. For example, it is advantageous to feed cod fry micro-algae for a period, in which the cod fry is particularly sensitive to environmental conditions. Shell production also appears to be a trade, which will have a need for feed of this kind. In poultry production micro-algae are already used as a feed supplement. Moreover, micro-algae are used for a number of purposes in research and industrial activities. According to the prior art micro-algae are produced in transparent pipes and containers, which are placed in buildings resembling greenhouses.
This is done to make the best possible use of the sun light, while, at the same time, it must be possible to control the temperature of the water. Production facilities of this kind are relatively expensive and space demanding.
It is proposed to use welded plastic ' sheets as containers in order to reduce the facility costs in connection with algae production. US patent 5534417 thus discloses a method for producing micro-algae, in which the micro-algae are placed in pockets made of plastic material, and in which gas is bubbled into the pockets .
Carbon dioxide, C02, is an important ingredient in the nutrient supply of micro-algae, and C02 is, therefore, mixed into air before being bubbled into the pockets. However, only a minor part of the C02 bubbled in is picked up by the algae in the pocket. The excess C02 flows out into the atmosphere. This, according to the prior art, common practice involves a cost-driving and unnecessary waste of C02.
The invention has as its object to remedy the drawbacks of the prior art.
The object is realized in accordance with the invention through the features specified in the description below and in the following claims.
Through a number of interconnected, closed growth containers a gas mixture comprising oxygen, 02 and carbon dioxide, C02, is circulated. The C02 that is not absorbed by algae in the growth containers is extracted into a gas-conditioning apparatus, which is arranged, among other things, to adjust the portion of C02 in the circulating gas before the gas is directed into the growth containers again.
The circulating gas mixture is also adjusted with respect to 02 in order to ensure that the 02-level does not exceed values critical to the micro-algae.
In a preferred embodiment the containers are made of a double plastic sheet, in which the two sheet layers are welded together along their peripheral edges and along parallel lines, so that the sheet layers form a sheet bag. The welding together along the parallel lines is terminated, at the end portions of the lines, at a distance from the edge weld of the sheet. The spaces between the parallel welding lines thus communicate with each other at their end portions .
By hanging the welded-together sheet bag on a rack in such a way that the parallel lines assume a vertical direction, the space within the sheet forms a number of growth containers which are closed relative to the surroundings.
A pipe for the supply and drainage of liquid is connected to the sheet bag. There are also arranged a supply and a drain for the gas circulated through the sheet bag. It is advantageous for the gas to be supplied via a perforated pipe located in the lower portion of the sheet bag. The gas may thereby be bubbled through the growth containers up to the upper portion of the sheet bag, where it is extracted into the gas processing apparatus.
Said sheet bag may with advantage be provided with further sheet layers, in which, for example, a fluid may be circulated for temperature adjustment of the liquid in the growth containers, or the light spectrum for the algae may be adjusted by means of a fluid present between adjacent sheet layers .
It is also possible temporarily to store the gas in a container before it is treated and returned to the sheet bag.
In an alternative embodiment, which is suitable for the production of micro-algae in the sea, the welded-together sheet bag is placed to float horizontally in the water surface. A perforated supply channel for gas is arranged along each growth container in the lower portion of the growth container. Gas is drawn off from the gas-filled upper portion of the gas container.
The method and the device according to the invention provide for large-scale production of algae, in which the investment and operating costs are relatively modest compared with those of the prior art .
In what follows, there will be described a non-limiting example of a preferred method and an embodiment which are visualized in the accompanying drawings, in which:
Figure 1 shows a side view of a sheet bag connected to a gas-conditioning apparatus;
Figure 2 shows a section I-I of Figure 1;
Figure 3 shows a section corresponding to that of Figure 2 , the sheet bag being provided with further sheet layers ; Figure 4 shows a side view of a sheet bag which is placed in the water surface; and
Figure 5 shows a section IV-IV of the sheet bag of Figure 4.
In the drawings the reference numeral 1 denotes a sheet bag including a first sheet 2 and a second sheet 4. The sheets 2 and 4 are welded together along their peripheral edges 6 and along parallel lines 8. The welds along the parallel lines 8 are terminated at a distance from the peripheral edge 6.
The sheet bag 1 is kept in an essentially vertical position by means of suspension hooks 10 complementarily fitting into suspension openings 12 in a mounting portion 14 of the sheet bag 1.
A first manifold 16 is formed in the upper portion of the sheet bag 1 in the region above the parallel weld lines 8 and is defined by the peripheral edge 6. Correspondingly, a second manifold 18 is formed in the lower portion of the sheet bag.
A first pipe 20 is connected via a valve 22 to the second manifold 18.
A gas-conditioning apparatus 24 communicates with the first manifold 16 by means of a second pipe 26, and with a perforated pipe 28, which is located in the second manifold 18, via a third pipe 30.
The perforated pipe 28 extends in the longitudinal direction of the second manifold 18.
The sheet bag 1 is filled with fluid containing, among other things, algae, via the valve 22 and the first pipe 20 up to a level 32. The spaces between the parallel lines 8 and between the parallel lines 8 and the vertical parts of the peripheral edge 6 now form growth containers 34, see Figure 2.
Gas, which has been corrected to the desired content of 02 and C02 and possibly other gases, flows from the gas- conditioning apparatus 24 via the third pipe 30 to the perforated pipe 28, from which the gas bubbles up through the growth containers 34.
Gas flowing out of the growth containers 34 into the first manifold 16, flows on to the gas-conditioning apparatus 24 through the second pipe 26.
The growth containers 34 together with the first manifold 16, the second manifold 18, the gas-conditioning apparatus 24, a second pipe 26, a third pipe 30 and the perforated pipe 28 form a circulation circuit.
In another exemplary embodiment, see Figure 3, the sheet bag 1 is provided with further sheet layers 36, 38 arranged for the circulation of temperature- and colour-adjusting fluid.
In a further embodiment, see Figures 4 and 5 , the sheet bag 1 is disposed floating in a water surface 40. In this embodiment perforated pipes 28 are fitted along the lower portion of each growth container 34. The gas flows from the perforated pipe 28 through the water in the growth container 34 up to a gas pocket 42, from where the gas flows out through the second pipe 26.
The elements 20, 26, 28 and 30 are referred to as pipes, but may be formed in the practical embodiment by, for example, integrated channels in the sheet bag, hoses or other hollow elements .

Claims

C l a i s
1. A system for the production of algae comprising growth containers (34) made of plastic sheet (2, 4), c h a r a c t e r i z e d i n that the cavities (16, 18, 34) of the sheet bag constitute a part of a closed system that includes a gas- conditioning apparatus (24) , and where the gas- conditioning apparatus (24) is designed to adjust at lest the C02-content of a gas that is collected at the top party of the growth containers (34) , prior to the return of the gas to the growth containers (34) .
2. A device in accordance with claim 1, c h a r a c t e r i z e d i n that the sheet bag (1) includes at least two growth containers (34) .
3. A device in accordance with claim 2, c h a r a c t e r i z e d i n that the growth containers (34) communicate with at least one of a first or a second manifold (16, 18) .
4. A device in accordance with claim 2, c h a r a c - t e r i z e d i n that growth containers (34) communicate, at their lower portions, with a perforated pipe (28) .
5. A device in accordance with claim 4, c h a r a c t e r i z e d i n that the perforated pipe (28) communicates with the gas-conditioning apparatus (24) .
6. A device in accordance with claims 3 and 5, c h a r a c t e r i z e d i n that the gas- conditioning apparatus (24) communicates with the first manifold (16) .
7. A device in accordance with claim 1, c h a r a c t e r i z e d i n that the growth containers (34) together with a first manifold (16) , a second manifold (18) , the gas-conditioning apparatus (24) , a second pipe (26) , a third pipe (30) and an at least one perforated pipe (28) form a circulation circuit.
EP05752394A 2004-06-11 2005-06-10 Device for algae production Withdrawn EP1765973A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20042425A NO320950B1 (en) 2004-06-11 2004-06-11 Device for algae production
PCT/NO2005/000196 WO2005121309A1 (en) 2004-06-11 2005-06-10 Device for algae production

Publications (1)

Publication Number Publication Date
EP1765973A1 true EP1765973A1 (en) 2007-03-28

Family

ID=35005918

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05752394A Withdrawn EP1765973A1 (en) 2004-06-11 2005-06-10 Device for algae production

Country Status (3)

Country Link
EP (1) EP1765973A1 (en)
NO (1) NO320950B1 (en)
WO (1) WO2005121309A1 (en)

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Also Published As

Publication number Publication date
NO20042425D0 (en) 2004-06-11
NO20042425L (en) 2005-12-12
WO2005121309A1 (en) 2005-12-22
NO320950B1 (en) 2006-02-20

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