The effect of direct and counter-current flow-through delignification on enzymatic hydrolysis of wheat straw, and flow limits due to compressibility

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The effect of direct and counter-current flow-through delignification on enzymatic hydrolysis of wheat straw, and flow limits due to compressibility. / Pihlajaniemi, Ville; Sipponen, Mika Henrikki; Pastinen, Ossi; Nyyssölä, Antti; Laakso, Simo.

In: Biotechnology and Bioengineering, Vol. 113, No. 12, 01.12.2016, p. 2605-2613.

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Pihlajaniemi, Ville ; Sipponen, Mika Henrikki ; Pastinen, Ossi ; Nyyssölä, Antti ; Laakso, Simo. / The effect of direct and counter-current flow-through delignification on enzymatic hydrolysis of wheat straw, and flow limits due to compressibility. In: Biotechnology and Bioengineering. 2016 ; Vol. 113, No. 12. pp. 2605-2613.

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@article{cf565c6e0d4c4fa990afac19d5742cdd,
title = "The effect of direct and counter-current flow-through delignification on enzymatic hydrolysis of wheat straw, and flow limits due to compressibility",
abstract = "This article compares the processes for wheat straw lignocellulose fractionation by percolation, counter-current progressing batch percolation and batch reaction at low NaOH-loadings (3–6{\%} of DM). The flow-through processes were found to improve delignification and subsequent enzymatic saccharification, reduce NaOH-consumption and allow reduction of thermal severity, whereas hemicellulose dissolution was unaffected. However, contrary to previous expectations, a counter-current process did not provide additional benefits to regular percolation. The compressibility and flow properties of a straw bed were determined and used for simulation of the packing density profile and dynamic pressure in an industrial scale column. After dissolution of 30{\%} of the straw DM by delignification, a pressure drop above 100 kPa m−1 led to clogging of the flow due to compaction of straw. Accordingly, the maximum applicable feed pressure and volumetric straw throughput was determined as a function of column height, indicating that a 10 m column can be operated at a maximum feed pressure of 530 kPa, corresponding to an operation time of 50 min and a throughput of 163 kg m−3 h−1. Biotechnol. Bioeng. 2016;113: 2605–2613.",
keywords = "compressibility, counter-current, delignification, flow-through, lignocellulose, percolation",
author = "Ville Pihlajaniemi and Sipponen, {Mika Henrikki} and Ossi Pastinen and Antti Nyyss{\"o}l{\"a} and Simo Laakso",
year = "2016",
month = "12",
day = "1",
doi = "10.1002/bit.26030",
language = "English",
volume = "113",
pages = "2605--2613",
journal = "Biotechnology and Bioengineering",
issn = "0006-3592",
publisher = "WILEY-BLACKWELL",
number = "12",

}

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TY - JOUR

T1 - The effect of direct and counter-current flow-through delignification on enzymatic hydrolysis of wheat straw, and flow limits due to compressibility

AU - Pihlajaniemi, Ville

AU - Sipponen, Mika Henrikki

AU - Pastinen, Ossi

AU - Nyyssölä, Antti

AU - Laakso, Simo

PY - 2016/12/1

Y1 - 2016/12/1

N2 - This article compares the processes for wheat straw lignocellulose fractionation by percolation, counter-current progressing batch percolation and batch reaction at low NaOH-loadings (3–6% of DM). The flow-through processes were found to improve delignification and subsequent enzymatic saccharification, reduce NaOH-consumption and allow reduction of thermal severity, whereas hemicellulose dissolution was unaffected. However, contrary to previous expectations, a counter-current process did not provide additional benefits to regular percolation. The compressibility and flow properties of a straw bed were determined and used for simulation of the packing density profile and dynamic pressure in an industrial scale column. After dissolution of 30% of the straw DM by delignification, a pressure drop above 100 kPa m−1 led to clogging of the flow due to compaction of straw. Accordingly, the maximum applicable feed pressure and volumetric straw throughput was determined as a function of column height, indicating that a 10 m column can be operated at a maximum feed pressure of 530 kPa, corresponding to an operation time of 50 min and a throughput of 163 kg m−3 h−1. Biotechnol. Bioeng. 2016;113: 2605–2613.

AB - This article compares the processes for wheat straw lignocellulose fractionation by percolation, counter-current progressing batch percolation and batch reaction at low NaOH-loadings (3–6% of DM). The flow-through processes were found to improve delignification and subsequent enzymatic saccharification, reduce NaOH-consumption and allow reduction of thermal severity, whereas hemicellulose dissolution was unaffected. However, contrary to previous expectations, a counter-current process did not provide additional benefits to regular percolation. The compressibility and flow properties of a straw bed were determined and used for simulation of the packing density profile and dynamic pressure in an industrial scale column. After dissolution of 30% of the straw DM by delignification, a pressure drop above 100 kPa m−1 led to clogging of the flow due to compaction of straw. Accordingly, the maximum applicable feed pressure and volumetric straw throughput was determined as a function of column height, indicating that a 10 m column can be operated at a maximum feed pressure of 530 kPa, corresponding to an operation time of 50 min and a throughput of 163 kg m−3 h−1. Biotechnol. Bioeng. 2016;113: 2605–2613.

KW - compressibility

KW - counter-current

KW - delignification

KW - flow-through

KW - lignocellulose

KW - percolation

UR - http://www.scopus.com/inward/record.url?scp=84976871444&partnerID=8YFLogxK

U2 - 10.1002/bit.26030

DO - 10.1002/bit.26030

M3 - Article

VL - 113

SP - 2605

EP - 2613

JO - Biotechnology and Bioengineering

JF - Biotechnology and Bioengineering

SN - 0006-3592

IS - 12

ER -

ID: 14871090