Storing energy crops for methane production: Effects of solids content and biological additive

Outi Pakarinen; Annimari Lehtomäki; Sanna Rissanen; J. Rintala

doi:10.1016/j.biortech.2008.01.007

Storing energy crops for methane production: Effects of solids content and biological additive

Outi Pakarinen^*
, Annimari Lehtomäki
, Sanna Rissanen
, J. Rintala

^*Corresponding author for this work

Not published at VTT

University of Jyväskylä

Research output: Contribution to journal › Article › Scientific › peer-review

107 Citations (Scopus)

Abstract

The effect of storage on chemical characteristics and CH₄ yield (taking into account loss of VS during storage) of a mixture of grasses and ryegrass, ensiled as such (low solids content) and after drying (medium and high solids) with and without biological additive, were studied in field and laboratory trials. Up to 87% and 98% of CH₄ yield was preserved with low solids grass (initial TS 15.6%) and high solids ryegrass (initial TS 30.4%), respectively, after storage for 6 months, while under suboptimal conditions at most 37% and 52% of CH₄ yield were lost. Loss in CH₄ yield was mainly due to VS loss, presumably caused by secondary fermentation as also suggested by increasing pH during storage. Biological additive did not assist in preserving the CH₄ yield.

Original language	English
Pages (from-to)	7074-7082
Number of pages	9
Journal	Bioresource Technology
Volume	99
Issue number	15
DOIs	https://doi.org/10.1016/j.biortech.2008.01.007
Publication status	Published - Oct 2008
MoE publication type	A1 Journal article-refereed

Funding

This study was financed by the EU 6th Framework Programme (project SES6-CT-2004-502824) and the Finnish Graduate School for Energy Technology. The authors wish to thank Ms Nipa Manosuk and Ms Leena Malkki for their kind help with the laboratory work. Farmer Erkki Kalmari is acknowledged for providing the substrates.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Anaerobic digestion
Biogas
Energy crop
Grass
Storage

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10.1016/j.biortech.2008.01.007

Cite this

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title = "Storing energy crops for methane production: Effects of solids content and biological additive",

abstract = "The effect of storage on chemical characteristics and CH4 yield (taking into account loss of VS during storage) of a mixture of grasses and ryegrass, ensiled as such (low solids content) and after drying (medium and high solids) with and without biological additive, were studied in field and laboratory trials. Up to 87\% and 98\% of CH4 yield was preserved with low solids grass (initial TS 15.6\%) and high solids ryegrass (initial TS 30.4\%), respectively, after storage for 6 months, while under suboptimal conditions at most 37\% and 52\% of CH4 yield were lost. Loss in CH4 yield was mainly due to VS loss, presumably caused by secondary fermentation as also suggested by increasing pH during storage. Biological additive did not assist in preserving the CH4 yield.",

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T2 - Effects of solids content and biological additive

AU - Pakarinen, Outi

AU - Lehtomäki, Annimari

AU - Rissanen, Sanna

AU - Rintala, J.

PY - 2008/10

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AB - The effect of storage on chemical characteristics and CH4 yield (taking into account loss of VS during storage) of a mixture of grasses and ryegrass, ensiled as such (low solids content) and after drying (medium and high solids) with and without biological additive, were studied in field and laboratory trials. Up to 87% and 98% of CH4 yield was preserved with low solids grass (initial TS 15.6%) and high solids ryegrass (initial TS 30.4%), respectively, after storage for 6 months, while under suboptimal conditions at most 37% and 52% of CH4 yield were lost. Loss in CH4 yield was mainly due to VS loss, presumably caused by secondary fermentation as also suggested by increasing pH during storage. Biological additive did not assist in preserving the CH4 yield.

KW - Anaerobic digestion

KW - Biogas

KW - Energy crop

KW - Grass

KW - Storage

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DO - 10.1016/j.biortech.2008.01.007

M3 - Article

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JO - Bioresource Technology

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ER -

Storing energy crops for methane production: Effects of solids content and biological additive

Abstract

Funding

UN SDGs

Keywords

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