Evaluation of bacterial pretreatment of spruce woodchips for mechanical pulping

Anne Kallioinen, Matti Siika-aho, Jaakko Pere, Anu Vaari, Liisa Viikari

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

Properties of woody raw materials for papermaking can be modified by microbial pretreatments. In this work, the growth conditions of a Pseudomonas marginalis strain, which efficiently reduces extractives in Norway spruce, were studied in more detail. Additional nitrogen was necessary for efficient growth of P. marginalis on the chips, whereas the sterilisation of the woodchips was not required for growth and for reduction of extractives content. The effects of P. marginalis pretreatment on the energy consumption in refining and on the paper properties of the pulp produced were investigated. No energy savings in refining were observed, but the tensile strength of the handsheets was improved. Evidently this was due to the removal of extractives in chip pretreatment.
Original languageEnglish
Pages (from-to)488 - 492
Number of pages5
JournalAppita Journal
Volume57
Issue number6
Publication statusPublished - 2004
MoE publication typeA1 Journal article-refereed

Fingerprint

Refining
Papermaking
Pulp
Energy conservation
Raw materials
Tensile strength
Energy utilization
Nitrogen

Keywords

  • Norway spruce
  • wood extractives
  • biopulping
  • mechanical pulping
  • tensile strength

Cite this

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title = "Evaluation of bacterial pretreatment of spruce woodchips for mechanical pulping",
abstract = "Properties of woody raw materials for papermaking can be modified by microbial pretreatments. In this work, the growth conditions of a Pseudomonas marginalis strain, which efficiently reduces extractives in Norway spruce, were studied in more detail. Additional nitrogen was necessary for efficient growth of P. marginalis on the chips, whereas the sterilisation of the woodchips was not required for growth and for reduction of extractives content. The effects of P. marginalis pretreatment on the energy consumption in refining and on the paper properties of the pulp produced were investigated. No energy savings in refining were observed, but the tensile strength of the handsheets was improved. Evidently this was due to the removal of extractives in chip pretreatment.",
keywords = "Norway spruce, wood extractives, biopulping, mechanical pulping, tensile strength",
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Evaluation of bacterial pretreatment of spruce woodchips for mechanical pulping. / Kallioinen, Anne; Siika-aho, Matti; Pere, Jaakko; Vaari, Anu; Viikari, Liisa.

In: Appita Journal, Vol. 57, No. 6, 2004, p. 488 - 492.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Evaluation of bacterial pretreatment of spruce woodchips for mechanical pulping

AU - Kallioinen, Anne

AU - Siika-aho, Matti

AU - Pere, Jaakko

AU - Vaari, Anu

AU - Viikari, Liisa

PY - 2004

Y1 - 2004

N2 - Properties of woody raw materials for papermaking can be modified by microbial pretreatments. In this work, the growth conditions of a Pseudomonas marginalis strain, which efficiently reduces extractives in Norway spruce, were studied in more detail. Additional nitrogen was necessary for efficient growth of P. marginalis on the chips, whereas the sterilisation of the woodchips was not required for growth and for reduction of extractives content. The effects of P. marginalis pretreatment on the energy consumption in refining and on the paper properties of the pulp produced were investigated. No energy savings in refining were observed, but the tensile strength of the handsheets was improved. Evidently this was due to the removal of extractives in chip pretreatment.

AB - Properties of woody raw materials for papermaking can be modified by microbial pretreatments. In this work, the growth conditions of a Pseudomonas marginalis strain, which efficiently reduces extractives in Norway spruce, were studied in more detail. Additional nitrogen was necessary for efficient growth of P. marginalis on the chips, whereas the sterilisation of the woodchips was not required for growth and for reduction of extractives content. The effects of P. marginalis pretreatment on the energy consumption in refining and on the paper properties of the pulp produced were investigated. No energy savings in refining were observed, but the tensile strength of the handsheets was improved. Evidently this was due to the removal of extractives in chip pretreatment.

KW - Norway spruce

KW - wood extractives

KW - biopulping

KW - mechanical pulping

KW - tensile strength

M3 - Article

VL - 57

SP - 488

EP - 492

JO - Appita Journal

JF - Appita Journal

SN - 1038-6807

IS - 6

ER -