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Open AccessArticle

Valorizing Waste Lignocellulose-Based Furniture Boards by Phosphoric Acid and Hydrogen Peroxide (Php) Pretreatment for Bioethanol Production and High-Value Lignin Recovery

by Jingwen Zhao 1,2, Dong Tian 1,2, Fei Shen 1,2,*, Jinguang Hu 3,4, Yongmei Zeng 1,2 and Churui Huang 1,2
1
Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, Sichuan, China
2
Rural Environment Protection Engineering & Technology Center of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, Sichuan, China
3
Chemical and Petroleum Engineering, Schulich School of Engineering, the University of Calgary, Calgary, AB T2N 4H9, Canada
4
Department of Wood Science, the University of British Columbia, Vancouver, BC V6T 1Z4, Canada
*
Author to whom correspondence should be addressed.
Sustainability 2019, 11(21), 6175; https://doi.org/10.3390/su11216175
Received: 9 October 2019 / Revised: 29 October 2019 / Accepted: 30 October 2019 / Published: 5 November 2019
(This article belongs to the Special Issue Advances in Biorefining of Biowaste)
Three typical waste furniture boards (fiberboard, chipboard, and blockboard) were pretreated with phosphoric acid and hydrogen peroxide (PHP). The fractionation process of these feedstocks was attempted in order to harvest the cellulose-rich fraction for enzymatic hydrolysis and bioethanol conversion; further, lignin recovery was also considered in this process. The results indicated that 78.9–91.2% of the cellulose was recovered in the cellulose-rich fraction. The decreased crystallinity, which promoted the water retention capacity and enzyme accessibility, contributed greatly to the excellent hydrolysis performance of the cellulose-rich fraction. Therefore, rather high cellulose–glucose conversions of 83.3–98.0% were achieved by hydrolyzing the pretreated furniture boards, which allowed for harvesting 208–241 g of glucose from 1.0 kg of feedstocks. Correspondingly, 8.1–10.4 g/L of ethanol were obtained after 120 h of simultaneous saccharification and fermentation. The harvested lignin exhibited abundant carboxyl –OH groups (0.61–0.67 mmol g−1). In addition, approximately 15–26 g of harvested oligosaccharides were integrated during PHP pretreatment. It was shown that PHP pretreatment is feasible for these highly recalcitrant biomass board materials, which can diversify the bioproducts used in the integrated biorefinery concept. View Full-Text
Keywords: furniture boards; ethanol production; lignin; biorefinery furniture boards; ethanol production; lignin; biorefinery
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MDPI and ACS Style

Zhao, J.; Tian, D.; Shen, F.; Hu, J.; Zeng, Y.; Huang, C. Valorizing Waste Lignocellulose-Based Furniture Boards by Phosphoric Acid and Hydrogen Peroxide (Php) Pretreatment for Bioethanol Production and High-Value Lignin Recovery. Sustainability 2019, 11, 6175.

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