Ruminal in vitro gas production, dry matter digestibility, methane abatement potential, and fatty acid biohydrogenation of six species of microalgae

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Download	View accepted manuscript: Ruminal in vitro gas production, dry matter digestibility, methane abatement potential, and fatty acid biohydrogenation of six species of microalgae (PDF, 642 KB)
DOI	Resolve DOI: https://doi.org/10.1139/cjas-2015-0141
Author	Search for: Anele, U. Y.; Search for: Yang, W. Z.¹; Search for: McGinn, P. J.¹; Search for: Tibbetts, S. M.¹; Search for: McAllister, T. A.
Name affiliation	National Research Council Canada. Aquatic and Crop Resource Development
Format	Text
Type	Article
Journal title	Canadian Journal of Animal Science
ISSN	0008-3984 1918-1825
Volume	96
Issue	3
Pages	354–363
Subject	biohydrogenation; batch culture; lipid; methane; microalgae; culture en batch; lipide; méthane; microalgue
Abstract	This study evaluated the composition, digestibility [dry matter digestibility (DMD)], CH4 abatement potential, and fatty acid biohydrogenation of six species of microalgae. Lipid content ranged from 115 g kg−1 dry matter (DM) (Scenedesmus sp. AMDD) to 361 g kg−1 DM (Tetracystis sp.), while Scenedesmus sp. AMDD had the highest carbohydrate (364 g kg−1 DM) and fibre content (277 g kg−1 DM). Gas production was highest (P < 0.001) for Micractinium reisseri and Chlorella vulgaris. In vitro DMD ranged from 654 g kg−1 for Scenedesmus sp. AMDD to 797 g kg−1 for Nannochloris bacillaris. Total CH4 differed (P < 0.001) among microalgae, ranging from 1.76 mL g−1 DM for Tetracystis sp. to 4.07 mL g−1 DM for M. reisseri. Nannochloropsis granulata (marine) had higher myristic, palmitoleic, and eicosapentaenoic acid levels than freshwater microalgae. Levels of α-linolenic acid were higher in Scenedesmus sp. AMDD than all other microalgae. CH4 production negatively correlated (P < 0.05) with levels of total carbohydrate, oleic, and α-linolenic acid. Despite having a lower lipid content, CH4 reductions with Scenedesmus sp. AMDD were comparable to Tetracystis sp. and N. bacillaris. Reductions in CH4 with Tetracystis sp. and N. bacillaris occurred without a decline in DMD, suggesting that overall microbial activity was not inhibited.
Publication date	2016-04-19
Publisher	National Research Council of Canada. Research Press
Language	English
Peer reviewed	Yes
NRC number	NRC-ACRD_56163
NPARC number	23000702
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Record identifier	f8b0a750-4f37-4784-9ebf-0c43084640f9
Record created	2016-08-29
Record modified	2020-03-16

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Date modified:: 2020-04-03