The Effect of Lignin Content in Birch and Beech Kraft Cellulosic Pulps on Simple Sugar Yields from the Enzymatic Hydrolysis of Cellulose

Kamila Przybysz Buzała, Halina Kalinowska, Edyta Małachowska, Piotr Boruszewski, Krzysztof Krajewski and Piotr Przybysz
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Kamila Przybysz Buzała: Natural Fibers Advanced Technologies, 42A Blekitna Str., 93-322 Lodz, Poland
Halina Kalinowska: Institute of Technical Biochemistry, Lodz University of Technology, 4/10 Stefanowskiego Str., 90-924 Lodz, Poland
Edyta Małachowska: Faculty of Wood Technology, Warsaw University of Life Sciences, 159 Nowoursynowska Str., 02-776 Warsaw, Poland
Piotr Boruszewski: Faculty of Wood Technology, Warsaw University of Life Sciences, 159 Nowoursynowska Str., 02-776 Warsaw, Poland
Krzysztof Krajewski: Faculty of Wood Technology, Warsaw University of Life Sciences, 159 Nowoursynowska Str., 02-776 Warsaw, Poland
Piotr Przybysz: Faculty of Wood Technology, Warsaw University of Life Sciences, 159 Nowoursynowska Str., 02-776 Warsaw, Poland

Energies, 2019, vol. 12, issue 15, 1-11

Abstract: The results of enzymatic hydrolysis of birch and beech kraft cellulosic pulps indicate that they may be promising feedstocks for fermentation processes including biofuel manufacturing. The aim of this study was to investigate whether birch and beech wood require the same degree of delignification by kraft pulping as pine wood. The differences observed in the efficiency of hydrolysis for the raw materials tested suggest that the differences in the anatomical structure of the examined wood in relation to pine wood is essential for the efficiency of the enzymatic hydrolysis process. The yields of glucose and other reducing sugars obtained from the birch and beech cellulosic pulps were similar (up to around 75% and 98.3% dry weight, and 76% and 98.6% dry weight, respectively). The highest glucose yields from cellulose contained in the birch and beech pulp were around 81.2% (at a Kappa number of 28.3) and 83.1% (at a Kappa number of 30.4), respectively. The maximum glucose yields and total reducing sugars of birch wood on a dry weight basis (39.8% and 52.1%, respectively) were derived from the pulp at a Kappa number of 28.3, while the highest yields of glucose and total reducing sugars of beech wood on a dry weight basis (around 36.9% and 48.2%, respectively) were reached from the pulp at a Kappa number of 25.3. To obtain the highest glucose yields and total reducing sugars of a wood on a dry weight basis, total lignin elimination from the birch and beech pulps was not necessary. However more in-depth delignification of birch and beech wood is required than for pine wood.

Keywords: cellulosic pulps; birch; beech; wood; kraft pulping; enzymatic hydrolysis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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