Waste-less bioethanol and other valuable substances production from hardwood

Rapoport, Alexander; Vedernikov, Nikolai; Krūma, Irēna; Puķe, Māris; Borovikova, Diāna; Rozenfelde, Linda; Khroustalyova, Galina; Matyuskova, N.

doi:10.2495/feem20130371

Cited by 4 publications

(5 citation statements)

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“…This depends on the total surface area of lignocellulosic particles as well as on their porosity and capillary structure (Karimi et al, 2013). The approach used in our research, which is based on the fundamental works of N. Vedernikov and his colleagues, has becomes the most challenging (Rapoport et al, 2014). First, it provides a means of development of waste-less technologies, which would provide a possibility to produce sequentially two main compounds that can substitute oil as a resource for the chemical industry and production of fossil fuel -furfural and ethanol.…”

Section: Discussionmentioning

confidence: 99%

Enzymatic Hydrolysis of Lignocellulose for Bioethanol Production

Rozenfelde

Puķe

Krūma

et al. 2017

Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences.

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Section: Discussionmentioning

confidence: 99%

Enzymatic Hydrolysis of Lignocellulose for Bioethanol Production

Rozenfelde

Puķe

Krūma

et al. 2017

Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences.

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“…This process does not reach 50% of the potential maximum yield. Apart from this, current industrial furfural production processes tend to also damage the cellulose fraction of the biomass, making it very difficult to convert this polysaccharide to glucose and further to ethanol (Win 2005 , Lange et al 2012 , Cai et al 2014 , Rapoport et al 2014 , Machado et al 2016 ).…”

Section: Introductionmentioning

confidence: 99%

Bioethanol and lipid production from the enzymatic hydrolysate of wheat straw after furfural extraction

Brandenburg

Poppele

Blomqvist

et al. 2018

Appl Microbiol Biotechnol

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This study investigates biofuel production from wheat straw hydrolysate, from which furfural was extracted using a patented method developed at the Latvian State Institute of Wood Chemistry. The solid remainder after furfural extraction, corresponding to 67.6% of the wheat straw dry matter, contained 69.9% cellulose of which 4% was decomposed during the furfural extraction and 26.3% lignin. Enzymatic hydrolysis released 44% of the glucose monomers in the cellulose. The resulting hydrolysate contained mainly glucose and very little amount of acetic acid. Xylose was not detectable. Consequently, the undiluted hydrolysate did not inhibit growth of yeast strains belonging to Saccharomyces cerevisiae, Lipomyces starkeyi, and Rhodotorula babjevae. In the fermentations, average final ethanol concentrations of 23.85 g/l were obtained, corresponding to a yield of 0.53 g ethanol per g released glucose. L. starkeyi generated lipids with a rate of 0.08 g/h and a yield of 0.09 g per g consumed glucose. R. babjevae produced lipids with a rate of 0.18 g/h and a yield of 0.17 per g consumed glucose. In both yeasts, desaturation increased during cultivation. Remarkably, the R. babjevae strain used in this study produced considerable amounts of heptadecenoic, α,- and γ-linolenic acid.

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“…Therefore, in future experiments it would be interesting also to test if preliminary treatment of substrate material with lignin-modifying enzymes would facilitate lignin use for L. edodes growth. The main conclusion from this study is that lignocellulose and/or lignin which remain after production of different valuable substances from various cellulosecontaining waste substrates (Rapoport et al, 2014) can be also efficiently used for mushroom production and for the development of new completely waste-less technology.…”

Section: Discussionmentioning

confidence: 99%