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- W4283655579 abstract "• P. vittata phytomass can be a promising feedstock for bioethanol production. • Shaking with 1% HNO 3 pretreatment removed greater than 80% As from P. vittata phytomass. • Recombinant bacteria-yeast co-culture system resulted in 48.5% bioethanol yield. • Developed microbial system has a great potential for bioethanol production via CBP. Sustainable management of harvested hyperaccumulating plants used in phytoremediation of toxic metals is considered quite challenging. The biomass of hyperaccumulators can be an attractive feedstock for bioethanol production, while removal of toxic metals and efficient ethanol conversion systems are necessary to ensure safe and optimum bioethanol production. This study aimed to develop a compatible and efficient consolidated bioprocessing system (CBP) to produce bioethanol from phytomass of arsenic (As)-hyperaccumulator Pteris vittata . A recombinant kefir yeast Kluyveromyces marxianus (KR7 strain) contained six cellulase genes and two recombinant Bacillus subtilis (Type 1 and Type 2 strains) carrying cellulosomal genes in different arrangements were used, and the saccharification and fermentation of P. vittata phytomass were investigated through one-step (KR7 strain only) and co-culture ( B. subtilis + KR7 strain) methods. The results of reducing sugar showed that KR7 strain possesses higher saccharification ability than both B. subtilis strains. While the co-culture of B. subtilis Type 2 strain with KR7 strain gave the highest ethanol yield, which achieved 48.5% ethanol yield from P. vittata phytomass after 3 d cultivation. In addition, simple pretreatment by shaking P. vittata with 1% of HNO 3 efficiently removed more than 80% of As from the phytomass, suggesting its applicability and feasibility for efficient As extraction to ensure efficient and non-toxic ethanol production. Our results confirm that the developed recombinant bacteria-yeast co-culture possesses a great potential for optimum bioethanol production from As-hyperaccumulators-derived phytomass via CBP." @default.
- W4283655579 created "2022-06-29" @default.
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- W4283655579 date "2022-10-01" @default.
- W4283655579 modified "2023-10-11" @default.
- W4283655579 title "Second-generation bioethanol production from phytomass after phytoremediation using recombinant bacteria-yeast co-culture" @default.
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- W4283655579 doi "https://doi.org/10.1016/j.fuel.2022.124975" @default.
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