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

Ville Pihlajaniemi (Corresponding Author), Mika Sipponen, Ossi Pastinen, Antti Nyyssölä, Simo Laakso

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)2605-2613
JournalBiotechnology and Bioengineering
Volume113
Issue number12
DOIs
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

Fingerprint

Delignification
Enzymatic hydrolysis
Straw
Compressibility
Triticum
Hydrolysis
Pressure
Dissolution
Throughput
Saccharification
Fractionation
Hot Temperature
Pressure drop
Compaction

Keywords

  • compressibility
  • counter-current
  • delignification
  • flow-through
  • lignocellulose
  • percolation

Cite this

@article{81c282bafdc64d358a6665ae201de780,
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.",
keywords = "compressibility, counter-current, delignification, flow-through, lignocellulose, percolation",
author = "Ville Pihlajaniemi and Mika Sipponen and Ossi Pastinen and Antti Nyyss{\"o}l{\"a} and Simo Laakso",
year = "2016",
doi = "10.1002/bit.26030",
language = "English",
volume = "113",
pages = "2605--2613",
journal = "Biotechnology and Bioengineering",
issn = "0006-3592",
publisher = "Wiley",
number = "12",

}

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

In: Biotechnology and Bioengineering, Vol. 113, No. 12, 2016, p. 2605-2613.

Research output: Contribution to journalArticleScientificpeer-review

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

AU - Pastinen, Ossi

AU - Nyyssölä, Antti

AU - Laakso, Simo

PY - 2016

Y1 - 2016

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.

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.

KW - compressibility

KW - counter-current

KW - delignification

KW - flow-through

KW - lignocellulose

KW - percolation

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 -