NDLI: High-solids anaerobic mono-digestion of riverbank grass under thermophilic conditions.

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High-solids anaerobic mono-digestion of riverbank grass under thermophilic conditions.

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High-solids anaerobic mono-digestion of riverbank grass under thermophilic conditions.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Andriamanohiarisoamanana, Fetra J. Matsunami, Nobuyuki Yamashiro, Takaki Iwasaki, Masahiro Ihara, Ikko Umetsu, Kazutaka
Description	Author Affiliation: Andriamanohiarisoamanana FJ ( Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido 080-8555, Japan. Electronic address: fetrajules@yahoo.fr.); Matsunami N ( Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido 080-8555, Japan.); Yamashiro T ( Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido 080-8555, Japan.); Iwasaki M ( Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido 080-8555, Japan.); Ihara I ( Graduate School of Agriculture Science, Kobe University, Kobe 657-8501, Japan.); Umetsu K ( Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido 080-8555, Japan. Electronic address: umetsu@obihiro.ac.jp.)
Abstract	The purpose of this study was to investigate the potential of high-solids anaerobic mono-digestion of riverbank grass under thermophilic conditions, focusing on the effects of the strength and the amount of inoculum. Ensiled grass was inoculated with three different inocula; inoculum from liquid anaerobic digester (LI), inoculum from dry anaerobic digester (DI), and mixture of LI and DI (MI), at feedstock-to-inoculum ratio (FIR) of 1, 2 and 4. The ensiling process of riverbank grass reduced moisture content (p>0.05), while the hemicellulose content was significantly increased from 30.88% to 35.15% (p<0.05), on dry matter basis. The highest methane production was at an FIR of 2 with MI (167L/kg VS ), which was significantly higher (p<0.05) than with DI, but not significant compared to LI (p>0.05). At an FIR of 4, digesters inoculated with LI and DI failed to produce methane, whereas 135L /kg VS was obtained with MI. The kinetic studies showed that at an FIR of 1 with LI and MI, the inoculum had less of effects on the hydrolysis rate constant (0.269day and 0.245day ) and methane production (135 versus 149L/kg VS ); rather, it affected the lag phase. In a thermophilic HS-AD of riverbank grass, the mixture of inoculum with low and high total solids content (TS) helps increase the TS of inoculum and digestion process. An FIR of 2 was deducted to be the limit for a better startup time and higher volumetric productivity of methane.
File Format	HTM / HTML
ISSN	10010742
Journal	Journal of Environmental Sciences
Volume Number	52
Language	English
Publisher	Elsevier
Publisher Date	2017-02-01
Publisher Place	Netherlands
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Environmental Health
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Medicine Environmental Engineering

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