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Cyclic l-lactide synthesis from lignocellulose biomass by biorefining with complete inhibitor removal and highly simultaneous sugars assimilation
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- He, Niling (författare)
- East China University of Science and Technology
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- Jia, Jia (författare)
- East China University of Science and Technology
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- Qiu, Zhongyang (författare)
- East China University of Science and Technology
- visa fler...
- Liu, Xiucai (författare)
- visa färre...
- (creator_code:org_t)
- 2022-03-21
- 2022
- Engelska.
- Ingår i: Biotechnology and Bioengineering. - : Wiley. - 0006-3592 .- 1097-0290. ; 119:7, s. 1903-1915
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- Cyclic chiral lactide is the monomer chemical for polymerization of high molecular weight polylactic acid (PLA). The synthesis of cyclic l-lactide starts from poly-condensation of l-lactic acid to a low molecular weight prepolymer and then depolymerized to cyclic l-lactide. Lignocellulose biomass is the most promising carbohydrate feedstock for lactic acid production, but the synthesis of cyclic l-lactide from l-lactic acid produced from lignocellulose has so far not been successful. The major barriers are the impurities of residual sugars and inhibitors in the crude cellulosic l-lactic acid product. Here we show a successful cyclic l-lactide synthesis from cellulosic l-lactic acid by lignocellulose biorefining with complete inhibitor removal and coordinated sugars assimilation. The removal of inhibitors from lignocellulose pretreatment was accomplished by biodetoxification using a unique fungus Amorphotheca resinae ZN1. The nonglucose sugars were completely and simultaneously assimilated at the same rate with glucose by the engineered l-lactic acid bacterium Pediococcus acidilactici. The l-lactic acid production from wheat straw was comparable to that from corn starch with high optical pure (99.6%), high l-lactic acid titer (129.4 g/L), minor residual total sugars (~2.2 g/L), and inhibitors free. The cyclic l-lactide was successfully synthesized from the regularly purified l-lactic acid and verified by detailed characterizations. This study paves the technical foundation of carbon-neutral production of biodegradable PLA from lignocellulose biomass.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Industriell bioteknik -- Bioprocessteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Industrial Biotechnology -- Bioprocess Technology (hsv//eng)
Nyckelord
- biodetoxification
- cellulose l-lactic acid
- cyclic l-lactide
- inhibitor
- nonglucose sugars
- Pediococcus acidilactici
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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- Biotechnology and Bioengineering (Sök värdpublikationen i LIBRIS)
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- Av författaren/redakt...
- He, Niling
- Jia, Jia
- Qiu, Zhongyang
- Fang, Chun
- Lidén, Gunnar
- Liu, Xiucai
- visa fler...
- Bao, Jie
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- TEKNIK OCH TEKNO ...
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