O-503 ジャトロァ種子搾油残渣のメタン発酵 : エネルギ-回収および消化液を用いた栽培(セッション5:導入)

概要

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Jatropha curcas has high potential as an energy crop. Jatropha seeds can be pressed into bio-oil that has good characteristics for direct combustion in compressed ignition engines or for the production of biodiesel. However, more than 60% weight of raw material remains as residue after screw-pressed, therefore utilization technology of Jatropha residues is required. In this study, biogas production from seeds of Jatropha after screw-pressed was examined according to components of seed residues. Cumulated biogas production from unseparated, episperm and endosperm part of seed residues was 452, 216 and 798 mL g^<-1> VS, respectively. High biogas production from endosperm is probably due to high contents of easily decomposable organic matter like fatty oil. In contrast, low biogas production from episperm is probably due to high contents of persistent organic matter like lignin. Consequently, biogas production per organic input from seed residues of Jatropha was more than that from cow manure, therefore it can be concluded that single fermentation of seed residues of Jatropha after screw-pressed is feasible under this experimental condition.
2012-12-25