| Project/Area Number |
13556023
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
林産学
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| Research Institution | THE UNIVERSITY OF TOKYO |
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Principal Investigator |
IIYAMA Kenji THE UNIVERSITY OF TOKYO, The University of Tokyo Asian Natural Environmental Science Center, Professor (60012077)
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| Co-Investigator(Kenkyū-buntansha) |
MATSUMOTO Yuji 東京大学, Graduate School of Agricultural and Life Sciences, Associate Professor (30183619)
OHOI Hiroshi University of Tsukuba, Graduate School of Life and Environmental Sciences, Lecturer (20201965)
ENOMAE Toshiharu 東京大学, Graduate School of Agricultural and Life Sciences, Assistant (40203640)
SHINNTANI Hiroyuki 東京大学, Graduate School of Agricultural and Life Sciences, Assistant (30282693)
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| Project Period (FY) |
2001 – 2002
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| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥12,700,000 (Direct Cost: ¥12,700,000)
Fiscal Year 2002: ¥4,800,000 (Direct Cost: ¥4,800,000)
Fiscal Year 2001: ¥7,900,000 (Direct Cost: ¥7,900,000)
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| Keywords | Rice straw / Kenaf / Ammonia-KOH pulping / Degree of polymerization of cellulose / Delignification rate / Steam explosion / Fertilizer from waste liquor / Growth of plant |
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| Research Abstract |
Rice straw would be easily modified by ammonia because wall polymers are associated by hydroxycinnamic acids through ether and ester bridges. Then aqueous NH_3 solution was selected as pulping liquor to develop new pulping system of rice straw. Waste liquor from conventional pulping of grasses using NaOH contains significant amount of NaSiO_2 originated from silica in grasses together with lignin, carbohydrates and NaOH. It is really difficult to treat waste liquor. New pulping process uses NH_3, waste liquor contains NH_3 together with lignin and carbohydrates. When small amount of KOH were used together with NH_3 as pulping liquor to promote pulping, the waste liquor should contain potassium, and enough properties of pulp for paper making. The waste liquor was applied as a fertilizer for maize and rice cultivations. Growth of plants was considerably promoted by the application of the waste liquor.
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