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Licensed Unlicensed Requires Authentication Published by De Gruyter December 15, 2016

Biodegradation of terpenes for emission-reduced oriented strand boards (OSB)

  • Bernhard Widhalm EMAIL logo , Cornelia Rieder-Gradinger , Thomas Kuncinger and Ewald Srebotnik
From the journal Holzforschung


A bacterial mixture of Pseudomonas putida and Pseudomonas fluorescens has recently shown the potential to completely reduce monoterpenes within pine wood particles on a laboratory scale. This bacterial combination was then applied onto pine wood strands to obtain emission-reduced oriented strand boards (OSB) produced on a technical scale. Laboratory tests with bacterial inoculated strands were carried out to optimise parameters such as aeration and incubation time. Residual terpene emissions were measured by solid-phase microextraction/ gas chromatography-mass spectrometry (SPME/GC-MS) analysis. Daily aeration, specific pre-cultivation, and increased inoculum size eventually resulted in a reduction of the major softwood terpenes α-pinene, β-pinene, and Δ3-carene by 60, 70, and 40%, respectively, after only 2 days of incubation. Based on these results, OSB were manufactured from strands after bacterial pre-treatment for 2 or 4 days. As expected, terpene emissions from OSB decreased with increasing incubation time. However, even after only 2 days of incubation, α-pinene and β-pinene emissions were appreciably reduced by 40 and 70%, respectively. The method developed here thus appears to be feasible for industrial application although a further reduction of pre-treatment time would be advantageous. The inoculation step will also have to be adapted for technical implementation into the OSB production process.


We thank the Austrian government and the federal governments of Upper Austria, Lower Austria, and Carinthia for funding the Competence Centre of Wood Composites and Wood Chemistry.


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Received: 2016-6-27
Accepted: 2016-11-7
Published Online: 2016-12-15
Published in Print: 2017-3-1

©2017 Walter de Gruyter GmbH, Berlin/Boston

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