Oil-based material-producing method and oil-based material-producing apparatus

Patent metadata

Field	Value
Publication number	US-10457930-B2
Application number	US-201113807865-A
Country	US
Kind code	B2
Filing date	Jun 30, 2011
Priority date	Jun 30, 2010
Publication date	Oct 29, 2019
Grant date	Oct 29, 2019

Abstract

An oil-based material-producing method includes a microwave irradiation step of irradiating oil-based material-producing microorganisms with microwaves. The oil-based material-producing method may also include a collecting step of collecting an oil-based material produced by the oil-based material-producing microorganisms after the microwave irradiation step.

First claim

The invention claimed is:

1. An oil-based material-producing method, comprising:
a placing step of adding water as a dispersion medium and oil-based material-producing microorganisms to a reactor to produce an aqueous slurry consisting of the water, the oil-based material-producing microorganisms and a microwave responsive material;
a microwave irradiation step of irradiating the aqueous slurry in the reactor with microwaves, breaking at least part of the cell walls of the oil-based material-producing microorganisms; and
collecting an oil-based material produced by the oil-based material-producing microorganisms after the microwave irradiation step,
wherein, in the microwave irradiation step, when the oil-based material-producing microorganisms are irradiated with microwaves in a presence of the microwave responsive material, the microwave responsive material is either one of a microwave-absorbing material and a microwave-sensitive material,
wherein the microwave responsive material is able to flow,
wherein the microwave responsive material has a shape for collecting electric field of microwaves,
wherein the microwave responsive material is a conductive substance, and
wherein the shape of the microwave responsive material is a grain shape having a surface provided with multiple pointed projections.

2. The oil-based material-producing method according to claim 1 , wherein the oil-based material-producing microorganisms are oil-based material-producing microalgae.

3. The oil-based material-producing method according to claim 1 , wherein the microwave responsive material consists of one or more of iron, nickel and cobalt, metal oxides, and non-fullerene carbon.

4. The oil-based material-producing method according to claim 1 , wherein the microwave irradiation step further comprises the step of rapidly heating and evaporating moisture within the oil-based material-producing microorganisms.

5. An oil-based material-producing method, comprising:
a placing step of adding water as a dispersion medium and oil-based material-producing microorganisms to a reactor to produce an aqueous slurry consisting of the water and the oil-based material-producing microorganisms;
a microwave irradiation step of irradiating the aqueous slurry in the reactor with microwaves, breaking at least part of the cell walls of the oil-based material-producing microorganisms;
a collection step of collecting an oil-based material produced by the oil-based material-producing microorganisms after the microwave irradiation step; and
a discharging step of discharging the oil-based material-producing microorganisms from the reactor,
wherein, in the microwave irradiation step, the aqueous slurry is irradiated with microwaves having at least first and second frequencies,
wherein the oil-based material-producing microorganisms are placed in the reactor that is a flow-through type having an upstream side and a downstream side,
wherein the reactor has an unfilled space in an upper portion inside the reactor,
wherein microwaves having the first frequency are irradiated to the slurry through the unfilled space at the upstream side,
wherein microwaves having the second frequency are irradiated to the slurry through the unfilled space at the downstream side, and
wherein the microwave irradiation step and the discharging step are continuously and gradually performed.

6. The oil-based material-producing method according to claim 5 , wherein the aqueous slurry further consists of a microwave responsive material that is a conductive sub stance.

7. The oil-based material-producing method according to claim 5 , wherein the aqueous slurry in the reactor is agitated by an agitation unit to substantially uniformly irradiate the aqueous slurry with microwaves.

8. The oil-based material-producing method according to claim 5 , wherein the reactor is partitioned into two or more chambers.

9. An oil-based material-producing method, comprising:
a placing step of adding water as a dispersion medium and oil-based material-producing microorganisms to a reactor to produce an aqueous slurry consisting of the water and the oil-based material-producing microorganisms;
a microwave irradiation step of irradiating the aqueous slurry, placed in the reactor with microwaves, breaking at least part of the cell walls of the oil-based material-producing microorganisms;
a collection step of collecting an oil-based material produced by the oil-based material-producing microorganisms after the microwave irradiation step; and
a discharging step of discharging the oil-based material-producing microorganisms from the reactor,
wherein the reactor has an unfilled space in an upper portion inside the reactor,
wherein the inner wall of the reactor is made of a material that reflects microwaves,
wherein the aqueous slurry is irradiated with microwaves through the unfilled space, and
wherein the microwave irradiation step and the discharging step are continuously and gradually performed.

10. The oil-based material-producing method according to claim 9 , wherein the reactor is of a horizontal flow-through type.

11. The oil-based material-producing method according to claim 9 , wherein, in the microwave irradiation step, the aqueous slurry is irradiated with microwaves in a presence of a microwave responsive material, which is either one of a microwave-absorbing material and a microwave-sensitive material.

12. The oil-based material-producing method according to claim 11 , wherein the microwave responsive material is able to flow.

13. The oil-based material-producing method according to claim 11 , wherein the microwave responsive material is a conductive substance.

14. The oil-based material-producing method according to claim 9 , wherein the oil-based material-producing microorganisms are oil-based material-producing microalgae.

15. The oil-based material-producing method according to claim 9 , wherein the aqueous slurry in the reactor is agitated by an agitation unit to substantially uniformly irradiate the aqueous slurry with microwaves.

16. The oil-based material-producing method according to claim 9 , wherein the reactor is partitioned into two or more chambers.

17. The oil-based material-producing method according to claim 9 , wherein the reactor is connected to a waveguide transmitting microwaves to the unfilled space in the upper portion inside the reactor.

18. The oil-based material-producing method according to claim 9 ,
wherein, in the collecting step, an oil layer, which is a layer of the oil-based material and is separated from a water layer, is collected.

Assignees

• Ishizuka Akinori
• Yoshino Iwao
• Tsukahara Yasunori
• Microwave Chemical Co Ltd
• Univ Osaka

Inventors

• Ishizuka Akinori
• Yoshino Iwao
• Tsukahara Yasunori

Classifications

• C12N13/00 Primary

  Treatment of microorganisms or enzymes with electrical or wave energy, e.g. magnetism, sonic waves · CPC title

• C12N1/12

  Unicellular algae; Culture media therefor (as new plants A01H13/00) · CPC title

• C12P7/6463

  obtained from glyceride producing microorganisms, e.g. single cell oil · CPC title

• C12M47/06

  Hydrolysis; Cell lysis; Extraction of intracellular or cell wall material (lysis of microorganisms C12N1/06; extracting or separating nucleic acids from biological samples C12N15/1003) · CPC title