Fractionation of Waste MDF by Steam Refining
In view of the expected increase in available waste medium-density fiberboard (MDF) and the current insufficient and unsatisfactory disposal capacities, efficient ways of recycling the waste material need to be developed. In this study, the potential of steam refining as a method to hydrolyze the re...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-05-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/25/9/2165 |
| _version_ | 1797568756008878080 |
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| author | Sebastian Hagel Bodo Saake |
| author_facet | Sebastian Hagel Bodo Saake |
| author_sort | Sebastian Hagel |
| collection | DOAJ |
| description | In view of the expected increase in available waste medium-density fiberboard (MDF) and the current insufficient and unsatisfactory disposal capacities, efficient ways of recycling the waste material need to be developed. In this study, the potential of steam refining as a method to hydrolyze the resins, isolate fibers, and obtain a hemicellulose-rich extract available for further utilization in the context of a biorefinery was assessed. Two different MDF waste samples, as well as poplar (<i>Populus spp.</i>) and spruce (<i>Picea spp.</i>) wood chips for benchmarking, were treated over a severity range from 2.47 to 3.95. The separated fiber and extract fractions were analyzed with regard to yield, content of carbohydrates, acids, degradation products, and nitrogen. A fiber fraction of more than 70% yield and an extract containing up to 30% of carbohydrates for further processing can be gained by steam-refining waste MDF. At low severities, most of the nitrogen-based compounds are solubilized. Increasing the severity leads to a decrease in nitrogen in the extract as the nitrogen compounds are converted into volatiles. A non-hydrolysable resin residue remains on the fibers, independent of the treatment severity. In comparison to the benchmark samples, the extract fraction of waste MDF shows a high pH of 8 and high amounts of acetic and formic acid. The generation of furfural and 5-hydroxymethylfurfural (5-HMF) on the other hand is suppressed. Distinct differences in carbohydrate hydrolysis behavior between waste MDF and conventional wood can be observed. Especially, the mannose-containing constituents seem to be resistant to hydrolysis reactions in the milieu created in MDF fractionation. |
| first_indexed | 2024-03-10T20:01:35Z |
| format | Article |
| id | doaj.art-8fe0a2230912438295281a4dbca0ff06 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-10T20:01:35Z |
| publishDate | 2020-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-8fe0a2230912438295281a4dbca0ff062023-11-19T23:33:13ZengMDPI AGMolecules1420-30492020-05-01259216510.3390/molecules25092165Fractionation of Waste MDF by Steam RefiningSebastian Hagel0Bodo Saake1Institute of Wood Science, Chemical Wood Technology, Universität Hamburg, Haidkrugsweg 1, 22885 Barsbüttel, GermanyInstitute of Wood Science, Chemical Wood Technology, Universität Hamburg, Haidkrugsweg 1, 22885 Barsbüttel, GermanyIn view of the expected increase in available waste medium-density fiberboard (MDF) and the current insufficient and unsatisfactory disposal capacities, efficient ways of recycling the waste material need to be developed. In this study, the potential of steam refining as a method to hydrolyze the resins, isolate fibers, and obtain a hemicellulose-rich extract available for further utilization in the context of a biorefinery was assessed. Two different MDF waste samples, as well as poplar (<i>Populus spp.</i>) and spruce (<i>Picea spp.</i>) wood chips for benchmarking, were treated over a severity range from 2.47 to 3.95. The separated fiber and extract fractions were analyzed with regard to yield, content of carbohydrates, acids, degradation products, and nitrogen. A fiber fraction of more than 70% yield and an extract containing up to 30% of carbohydrates for further processing can be gained by steam-refining waste MDF. At low severities, most of the nitrogen-based compounds are solubilized. Increasing the severity leads to a decrease in nitrogen in the extract as the nitrogen compounds are converted into volatiles. A non-hydrolysable resin residue remains on the fibers, independent of the treatment severity. In comparison to the benchmark samples, the extract fraction of waste MDF shows a high pH of 8 and high amounts of acetic and formic acid. The generation of furfural and 5-hydroxymethylfurfural (5-HMF) on the other hand is suppressed. Distinct differences in carbohydrate hydrolysis behavior between waste MDF and conventional wood can be observed. Especially, the mannose-containing constituents seem to be resistant to hydrolysis reactions in the milieu created in MDF fractionation.https://www.mdpi.com/1420-3049/25/9/2165biorefineryMDFrecyclingwaste valorizationsteam treatmenthemicelluloses |
| spellingShingle | Sebastian Hagel Bodo Saake Fractionation of Waste MDF by Steam Refining Molecules biorefinery MDF recycling waste valorization steam treatment hemicelluloses |
| title | Fractionation of Waste MDF by Steam Refining |
| title_full | Fractionation of Waste MDF by Steam Refining |
| title_fullStr | Fractionation of Waste MDF by Steam Refining |
| title_full_unstemmed | Fractionation of Waste MDF by Steam Refining |
| title_short | Fractionation of Waste MDF by Steam Refining |
| title_sort | fractionation of waste mdf by steam refining |
| topic | biorefinery MDF recycling waste valorization steam treatment hemicelluloses |
| url | https://www.mdpi.com/1420-3049/25/9/2165 |
| work_keys_str_mv | AT sebastianhagel fractionationofwastemdfbysteamrefining AT bodosaake fractionationofwastemdfbysteamrefining |