2012 Fiscal Year Final Research Report
Optimization ofsaccharification yield of wood-cellulosic material for bio-ethanol production through mechanical treatment
| Project/Area Number |
21580307
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Agricultural environmental engineering
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| Research Institution | Kobe University |
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Principal Investigator |
SHOJI Koichi 神戸大学, 大学院・農学研究科, 准教授 (10263394)
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| Project Period (FY) |
2009 – 2012
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| Keywords | 微破砕 / 竹 / 糖化効率 / 所要エネルギ / 粒径 / 回転篩 / フレール刃 / 軸回転数 |
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| Research Abstract |
A prototype of a fine-crusher (grinder) of wood-cellulosic materials has been constructed with flail-knives and a rotary sieve rotating independently of each other. Pieces of bamboo in batches were fed into the fine-crusher, the crushed material was then treated with pressurized hot water (sub-critical water) to modify its structure and then hydrolyzed into glucose with an enzyme. With an increase in the diameter of the pores of the rotary sieve, the specific energy requirement for fine-crushing decreased remarkably from 500 to 250 kJ/kg, whilethe estimated glucose yield at 200°C decreased negligibly from 38% to 35%. The best rotational speed of the rotor and the diameter of the sieve pores were 1500 rpm and 4 mm, respectively. Additionally, sieve pore diameters of 6 mm and 8 mm was tested to reduce the specific energy requirement, and the acidic hydrolysis showed that such large pore significantly decreased the glucose yield due to too large material produced.A trial at a rotor speed of 2400 rpm showed that finer material was produced and the netenergy requirement did not increase, which implied that further development of the fine-crusher was needed to increase glucose yield at the reduced energy requirement. The results of the additional experiments were partly supported by high-speed video movies taken in the fine-crusher.
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Research Products
(18 results)
