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No.38 (1991/12) >

Title :半固形メタン発酵法によるサトウキビ葉・梢頭部からのバイオガス生産(生物資源科学科)
Title alternative :Biogas production from sugar-cane top &leaves by semi-solid state methane fermentation (Department of Bioscience and Biotechnology)
Authors :石原, 昌信
当山, 清善
Authors alternative :Ishihara, Masanobu
Toyama, Seizen
Issue Date :4-Dec-1991
Abstract :小型容器を用いてサトウキビ葉・梢頭部を基質とした半固形メタン発酵を行ない,全ガス発生量,発生ガス中のメタン含量,発酵液のpH及び揮発性有機酸量について調べた。発酵開始時の水分含量が84%以上の発酵で良好なガス発生が認められた。最適発酵温度及び初発pHはそれぞれ37℃と7∿8付近であった。発酵30日間で基質1g当たり402mlのガス発生量を示し,そのうち54%がメタンガスであった。発酵初期には酢酸,プロピオン酸及びn-酪酸等の揮発性有機酸が生成・蓄積されたが発酵時間の経過に伴ない減少した。基質中のセルロースの分解率は発酵30日間で約60%に達した。水酸化ナトリウム溶液で前処理すると無処理の約1.3倍のガス発生量が得られた。
Sugar-cane top&leaves produced as a waste at harvesting sugar-cane were subjected to semi-solid state methane fermentation by syringe method. The methane fermentation was carried out at 37℃ and 7.5 of pH in a 200-mℓ syringe containing the sludge which was acclimated to the same substrate, and evolution and composition of the gas, volatile fatty acids and pH were measured. A good gas production from the substrate was observed when water content in the mash was higher than 84% (v/v). The optimum pH range and temperature of the mash for methane fermentation were from 7 to 8 and 37℃, respectively. The total gas evolved was 402mℓ per g of substrate with a methane ratio of 54% in 30 days of fermentation. Acetate, propionate and n-butyrate were accumulated in the mash in early stages of fermentation and decreased during fermentation process. The biodegradation of cellulose in the materials amounted to 60% in 30 days of fermentation. The gas production from the alkali-treated sugar-cane top&laeves was 1.3 times higher than that from the untreated materrials.
Type Local :紀要論文
ISSN :0370-4246
Publisher :琉球大学農学部
URI :http://hdl.handle.net/20.500.12000/3843
Citation :琉球大学農学部学術報告 = The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus no.38 p.243 -248
Appears in Collections:No.38 (1991/12)

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