| Project/Area Number |
18360434
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Recycling engineering
|
|---|
| Research Institution | Tokyo University of Agriculture and Technology |
|---|
Principal Investigator |
KOKUGAN Takao Tokyo University of Agriculture and Technology, Institute of Symbiotic Science and Technology, Professor (00015108)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
ISO Mamoru Tokyo University of Agriculture and Technology, Institute of Symbiotic Science and Technology, Associate professor (60184587)
QIAN Wei hua Tokyo University of Agriculture and Technology, Institute of Symbiotic Science and Technology, Associate professor (00302919)
HONDA Taijirou Tokyo University of Agriculture and Technology, Institute of Symbiotic Science and Technology, Assistant professor (20092497)
|
|---|
| Project Period (FY) |
2006 – 2007
|
| Project Status |
Completed (Fiscal Year 2007)
|
| Budget Amount *help |
¥17,060,000 (Direct Cost: ¥15,200,000、Indirect Cost: ¥1,860,000)
Fiscal Year 2007: ¥8,060,000 (Direct Cost: ¥6,200,000、Indirect Cost: ¥1,860,000)
Fiscal Year 2006: ¥9,000,000 (Direct Cost: ¥9,000,000)
|
|---|
| Keywords | Cassava / Biodegradable plastic / Sustainable development / Productivity / Specific growth rate / Product inhibition / Onsite plant / Poly lactic acid |
|---|
| Research Abstract |
To reduce production cost of poly-lactic acid from biomass, we proposed onsite cell plant system of integrated production combined fermentation process, separation and refining process and synthesis process. It is necessary to make the processes to be satisfied with onsite specifications, that is, simple, compact, safety high productivity and long lifetime. The followings were clear for three processes :
1. Fermentation process:
・Fresh cassava root and tofu liquid waste are useful for substrate and media, respectively.
・Streptococcus bovis fermented directly lactic acid from starch without saccharification
2. Separation and refining process
・Yield of esterification of lactic acid was affected by the starch concentration.
・The esterification of lactic acid with butanol have highest conversion at 124℃
3. Synthesis process
・Poly lactic acid with molecular weight of 90kDalton was obtained without catalysis
・Poly lactic acid with molecular weight of 20kDalton was obtained by direct reaction in 24hours.
|
