Application of Two-Step Composting Process to Rice Straw Compost
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概要
- 論文の詳細を見る
A two-step composting process was applied for converting rice straw into compost with a high cation exchange capacity and humic acid content. The 1st step of fermentation (hereafter refered to as 1stSF) involved lignin degradation using white-rot fungus Coriolus versicolor, and the 2nd step of fermentation (2ndSF) involved a general composting process. The amount of lignin decreased by 4.1 and 10.1% during the second and fourth weeks of the 1stSF by C. Versicolor, respectively. The cation exchange capacity of the compost from fermented rice straw which after 4 weeks was 28 meq/100 g at the initial stage of the 2ndSF increased to 74 meq/100 g after the 2ndSF for a period of 4 weeks using sewage sludge as seed source. On the other hand the cation exchange capacity increased from 25 meq/100 g at the initial stage of the 2ndSF to 60 meq/100 g when only 2ndSF was applied. Humic acid content after the 2ndSF for a period of 4 weeks was 7.3% in the compost from fermented rice straw and 6.0% in the unfermented one. These results indicate that the two-step composting process was effective in accelerating humification during rice straw composting.
- 社団法人日本土壌肥料学会の論文
著者
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Mimura A
Department Of Applied Chemistry And Biotechnology Faculty Of Engineering University Of Yamanashi
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Mimura A
Hitachi Ltd. Ibaraki Jpn
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Mimura Akio
Biotechnology Research Laboratory Kobe Steel Ltd.
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Takahara Y
Biotechnology Research Laboratory Kobe Steel Ltd.
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Takahara Y
Kobe Steel Ltd. Ibaraki Jpn
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Takahara Yoshimasa
Biotechnology Research Laboratory Kobe Steel Ltd.
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Mimura A
Univ. Of Yamanashi Yamanashi Jpn
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Mimura Akiko
Department Of Applied Chemistry And Biotechnology Faculty Of Engineering University Of Yamanashi
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KAKEZAWA MASAAKI
Biotechnology Research Laboratory, Kobe Steel Ltd.,
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Kakezawa M
Kobe Steel Ltd. Kobe Jpn
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