Overcoming challenges in lignocellulosic biomass pretreatment for second-generation (2G) sugar production: emerging role of nano, biotechnological and promising approaches

Autor(es)

Fernandes Antunes, Felipe Antonio ; Chandel, Anuj Kumar ; Teran-Hilares, Ruly ; Ingle, Avinash P. ; Rai, Mahendra ; dos Santos Milessi, Thais Suzane ; da Silva, Silvio Silverio ; dos Santos, Julio Cesar

• Tipo de documento: Artigo Científico
• Fonte: 3 BIOTECH; v. 9, n. 6, p. 17-pg., 2019-06-01.

Resumo

Production of green chemicals and biofuels in biorefineries is the potential alternative for petrochemicals and gasoline in transitioning of petro-economy into bioeconomy. However, an efficient biomass pretreatment process must be considered for the successful deployment of biorefineries, mainly for use of lignocellulosic raw materials. However, biomass recalcitrance plays a key role in its saccharification to obtain considerable sugar which can be converted into ethanol or other biochemicals. In the last few decades, several pretreatment methods have been developed, but their feasibility at large-scale operations remains as a persistent bottleneck in biorefineries. Pretreatment methods such as hydrodynamic cavitation, ionic liquids, and supercritical fluids have shown promising results in terms of either lignin or hemicellulose removal, thus making remaining carbohydrate fraction amenable to the enzymatic hydrolysis for clean and high amount of fermentable sugar production. However, their techno-economic feasibility at industrial scale has not been yet studied in detail. Besides, nanotechnological-based technologies could play an important role in the economically viable 2G sugar production in future. Considering these facts, in the present review, we have discussed the existing promising pretreatment methods for lignocellulosic biomass and their challenges, besides this strategic role of nano and biotechnological approaches towards the viability and sustainability of biorefineries is also discussed. (AU)

• Processo FAPESP: 16/23758-4 - Produção de etanol e pululana assistida por métodos não convencionais em biorrefinarias de bagaço de cana-de-açúcar: reatores de cavitação hidrodinâmica e emprego de luz visível de diferentes comprimentos de onda
• Beneficiário: Júlio César dos Santos
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Regular
• Processo FAPESP: 16/10636-8 - Da fábrica celular à biorrefinaria integrada Biodiesel-Bioetanol: uma abordagem sistêmica aplicada a problemas complexos em micro e macroescalas
• Beneficiário: Roberto de Campos Giordano
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Temático
• Processo FAPESP: 17/11086-4 - Desenvolvimento de abordagens inovadoras para as principais etapas da produção de etanol 2G: pré-tratamento contínuo usando cavitação hidrodinâmica e avaliação de processo SSCF com reatores interconectados
• Beneficiário: RULY TERAN HILARES
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 14/27055-2 - Intensificação de processos em biorrefinarias de lignocelulósicos integrando etapas de produção de etanol e xilitol a partir de bagaço de cana-de-açúcar em reator de leito fluidizado
• Beneficiário: Felipe Antonio Fernandes Antunes
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado