Valorization of lignin from aqueous-based lignocellulosic biorefineries.

An additional 100 million tons/year of lignin coproduct will result when lignocellulosic biomass is processed in biorefineries to fiber, sugars, biofuels, and bioproducts. This will double the amount of lignin already generated from pulping and paper production. Unlike pulping that results in lignosulphonate (88% of total) or Kraft lignin (9%), aqueous-based biorefining leaves behind non-sulfonated lignin and aromatic molecules. This new type of lignin provides opportunities for large volume agricultural uses such as controlled-release carriers and soil amendments as well as feedstocks for new chemistries that lead to molecular building blocks for the chemical industry and to precursors for sustainable aviation biofuels.

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Déclaration de conflit d'intérêts

Declaration of interests The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. M.L. was chief technology officer (CTO) of Mascoma from 2007 to 2013, and a consultant in 2014. Mascoma developed and scaled-up consolidated bioprocessing of hardwood slurries. M.L. holds equity in Mascoma (acquired by Lallemand and by Renmatix, respectively) with the equity managed by Enchi. US Patents related to biomass conversion: 8,790,904; 9,359,619; 10,093,951; 10,072,253 B2; 10,125,454 B2; 10,144,785 B2; 10,745,726 B2; 11,371,069 B2. Chinese Patent ZL201080046974.3. BR Patent 1120120085131. Canada Patent 2805881. The patents are issued to the Purdue Research Foundation.