Method for producing single cell oil from lignocellulosic materials
ข้อถือสิทธิ
1. A method for producing ไลปิด, ซึ่งประกอบรวมด้วย the following steps
(i) providing a cultivation medium ซึ่งประกอบรวมด้วย a lignocellulosic hydrolysate,
5 (ii) providing a fermentation broth by inoculating the cultivation medium of (i)
with a first microbe, where said first microbe is an oleaginous microbe,
(iii) incubating said medium inoculated with said first microbe allowing ไลปิด to accumulate,
โดยที่ said fermentation broth ประกอบรวมด้วย at least one microbial growth inhibitor,
10 and โดยที่ said first microbe is tolerant to said microbial growth inhibitor(s ), โดยที่ said incubation is conducted under aerobic conditions.
2. The method of ข้อถือสิทธิ 1, โดยที่ said fermentation broth further ประกอบรวมด้วย a second microbe, which is intolerant to said at least one microbial growth inhibitor.
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3. The method according to ข้อถือสิทธิ 2, โดยที่ said second microbe is present in the cultivation medium provided in step (i) or contaminated the fermentation broth at step (ii) or (iii).
20 4. The method according to any of the preceding ข้อถือสิทธิ, โดยที่ said second microbe is a non-oleaginous microbe.
5. The method according to any of the preceding ข้อถือสิทธิ, โดยที่ said at least one microbial growth inhibitor is present in said fermentation broth at a concentration
25 within the range of tolerance of said first microbe and outside the range of tolerance
of said second microbe.
6. The method according to any of the preceding ข้อถือสิทธิ, further ซึ่งประกอบรวมด้วย a step of adding said at least one microbial growth inhibitor or adjusting the concentration of
30 said at least one microbial growth inhibitor in the fermentation broth.
7. The method according to any of the preceding ข้อถือสิทธิ, โดยที่ at least one microbial growth inhibitor is the group of phenolic compounds measured as concentration of total phenols per volume of fermentation broth.
8. The method according to ข้อถือสิทธิ 7, โดยที่ the level of said phenolic compounds in said fermentation broth is at least 1 g/ I.
5 9. The method according to ข้อถือสิทธิ 7 or 8, โดยที่ the level of said phenolic compounds in said fermentation broth is in the range of 1 g/l to 7 g/l or above.
10. The method according to any of ข้อถือสิทธิ 7 to 9, โดยที่ the level of said phenolic compounds in said fermentation broth is within the range of 1 g/l to 5 g/l, ที่ควรใช้คือ
10 within the range of 1 g/1 to 3 g/l.
11. The method according to any of the preceding ข้อถือสิทธิ, โดยที่ said first microbe is selected from the list consisting of filamentous fungi, yeast, bacteria and algae.
15 12. The method according to any of the preceding ข้อถือสิทธิ, โดยที่ said first microbe is selected from the group consisting of Mortierelfa, Aspergillus, Upomyces, Rhodosporidium and Cryptococcus.
13. The method according to any one of ข้อถือสิทธิ 2 to 12 , โดยที่ said second
20 microbe is non-oleaginous selected from the list consisting of bacteria, yeast, filamentous fungi or microalgae.
14. The method according to any one of ข้อถือสิทธิ 2 to 13, โดยที่ said second microbe is a bacterium selected from the group consisting of Bacillus spp.,
25 Pseudomonas spp.
15. The method according to any of the preceding ข้อถือสิทธิ, โดยที่ said first microbe is capable of producing and accumulating more than fifteen per cent of its weight as lipid.
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ABSTRACT
The การประดิษฐ์นี้ relates to methods for producing microbial ไลปิด. In particular the การประดิษฐ์นี้ relates to methods for producing microbial ไลปิด using inhibitors obtainable from lignocellulosic materials to supress the การเพิ่มจำนวน of unwanted microorganisms in the fermentation broth. The method of the การประดิษฐ์ therefore reduce the risk of having contaminating microbes establish in the system and the cultivation and thus higher yields of microbial ไลปิด may be obtained.