DEVICE AND METHOD FOR TREATING BIOMASS

• US 20100129909A1
• Filed: 10/11/2006
• Published: 05/27/2010
• Est. Priority Date: 10/11/2005
• Status: Abandoned Application

• Current Assignee: Earnest Stuart
• Original Assignee: Earnest Stuart
• Inventors: Stuart, Earnest
• Application Number:
  US12/445,285
• Publication Number:
  US 20100129909A1
• Time in Patent Office: Days
• US Class Current: 435/375
• CPC Class Codes: C12M 45/02 by mechanical forces; Stirring; Trituration; Comminuting crushing, pulverizing, disintegrating in general B02C
• CPC Class Codes: C12M 45/06 by chemical means or hydrolysis
• CPC Class Codes: C12M 45/20 Heating; Cooling heating or cooling apparatus for laboratory uses B01L7/00

Abstract

A method for pretreating and disrupting cell structure of biomass by subjecting the biomass to high pressure, thereby disrupting the cell structure of the biomass is provided. Also provided is a device for performing the method, wherein the device includes a cavitating device and a cell structure disrupting device disposed within the cavitating device for disrupting the cell structure and exposing the internal cell structure to enzymes.

Claims

1. A method for pretreating and disrupting cell structure of biomass by subjecting the biomass to high shear and cavitational decompression, by subjecting the biomass to a cavitating or shearing device having holes through which a slurry containing the biomass is pumped and subjecting the biomass to tip speeds of at least 51 feet per second.

2. The method according to claim 1, wherein said subjecting step includes subjecting the biomass to a tip speed of at least 150 feet per second.

3. The method according to claim 1, further including heating the biomass prior to cavitating or shearing to a temperature up to a boiling point of the water containing biomass without boiling the water containing the biomass.

4. The method according to claim 1, further including heating the biomass during cavitation or shearing to a temperature up to a boiling point of the water containing the biomass without boiling the biomass.

5. The method according to claim 4, further including hydrolyzing, cavitating, and shearing the biomass including heating the biomass to temperatures of at least 150°

C.

6. The method according to claim 3, further including heating the biomass during cavitation or shearing to a temperature up to a boiling point of the water containing biomass without boiling the water containing the biomass.

7. The method according to claim 4 wherein said temperature subjected step further includes hydrolyzing the hemicellulose using acid loadings in the range of between 0.025-2.

8. The method according to claim 3, wherein said temperature subjecting step includes subjecting the biomass to the temperature for a range of time from between a few seconds through minutes.

9. The method according to claim 1, wherein said subjecting second stage step includes subjecting biomass ranging from 1:

40 to 1;

1200 by dry weight of cellulase to biomass.

10. The method according to claim 1, wherein said subjecting step includes pumping the biomass to a pressure up to 10,000 PSI.

11. The method according to claim 10, further including heating the biomass prior to and during cavitating or shearing to a temperature up to a boiling point of the water containing the biomass without boiling the water containing the biomass.

12. The method according to claim 1, wherein said subjecting step includes pumping the biomass into a nozzle.

13. The method according to claim 12, wherein said subjecting step includes passing the biomass through an exiting orifice of the nozzle.

14. The method according to claim 13, wherein said passing step includes the vaporizing stage of cavitating the slurry containing the biomass when the slurry exits the orifice of the nozzle.

15. The method according to claim 14, wherein said passing step includes condensing the water vapors surrounding the biomass in the collapsing stage of cavitation after the biomass has exited the orifice of the nozzle.

17. The method according to claim 1, wherein said subjecting step includes subjecting biomass having a solids loadings of between 0.1% and 18%.

18. The method according to claim 1, wherein said subjecting step includes subjecting the biomass to pressures up to 10,000 PSI followed by first stage of cavitational pressure release.

19. The method according to claim 1, wherein said method includes hydrolyzing the cellulosic glucose fraction of the grain and the starch glucose fraction.

20. A device for performing the method of claim 1, said device comprising:

a cavitating device; and

cell structure disrupting means disposed within said cavitating device for disrupting the cell structure and exposing carbohydrates within the cell, wherein said cell structure disrupting means includes holes sized between 10 millimeters and 0.25 millimeters in diameter to optimize the process.

21. The device according to claim 20, wherein said holes are sized between 5 mm and 0.5 mm in diameter.

16. (canceled)

22. (canceled)

23. (canceled)

24. (canceled)

25. (canceled)

26. (canceled)

27. (canceled)

28. (canceled)

29. (canceled)

30. (canceled)