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Lactic Acid Production from Renewable Feedstock: Fractionation, Hydrolysis, and Fermentation
Author(s) -
Gavilà Llorenç,
Constantí Magda,
Medina Francisco,
PezoaConte Ricardo,
Anugwom Ikenna,
Mikkola JyriPekka
Publication year - 2018
Publication title -
advanced sustainable systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.499
H-Index - 24
ISSN - 2366-7486
DOI - 10.1002/adsu.201700185
Subject(s) - fractionation , lactic acid , chemistry , fermentation , bagasse , hydrolysate , hydrolysis , raw material , saccharum officinarum , food science , pulp and paper industry , pulp (tooth) , xylose , arundo donax , sugar , acid hydrolysis , lignin , chromatography , biochemistry , biomass (ecology) , organic chemistry , botany , bacteria , biology , agronomy , medicine , genetics , pathology , engineering
In this paper, an integrated fractionation with a switchable ionic liquid (SIL), pulp hydrolysis, and lactic acid fermentation is carried out. For this, SO 2 ‐swithced SIL is used for fractionation of sugar cane ( Saccharum officinarum ) bagasse and giant cane ( Arundo donax , AD). SIL is able to extract ≈2/3 of lignin when relatively large wood chips (≈4 mm) are used without any mechanical agitation and just 1 h of treatment time for AD. Furthermore, SIL reuse is successfully demonstrated for four runs. Subsequently, the produced pulps are hydrolyzed within 15 min in a microwave reactor, producing a glucose rich hydrolysates. Finally, these hydrolysates are used as a carbohydrate source for Lactobacillus delbrueckii fermentation, which selectively transform all glucose present into optically pure d ‐lactic acid. Hence, the whole chain for lactic acid production from biomass is successfully demonstrated.