INFLUENCE IN CHEMICAL AND PHYSICAL PRE-TREATMENT WITH CELLULOSE AND LIGNIN FRACTIONS OF DIFFERENT BIOMASSES AND THEIR CAPACITY FOR SECOND GENERATION ETHANOL PRODUCTION

  • Thaysi Castro Coelho Andrade Universidade Federal do Tocantins.
  • Lara Neira de Siqueira Universidade Federal do Tocantins
  • Dener Alves de Souza Universidade Federal do Tocantins
  • Fabricia Vieira Silva Universidade Federal do Tocantins
  • Patricia Martins Guarda Universidade Federal do Tocantins
  • Emerson Adriano Guarda Universidade Federal do Tocantins
Keywords: Lignin-cellulose biomass, Cellulose and lignin, Pre-treatment.

Abstract

The development of lignin-cellulose ethanol, derived from residual biomass, has been underscored in research on energy. Current assay comprised sugarcane bagasse, elephant grass and sawdust (red angelim) to evaluate cellulose and lignin rates prior to and after being submitted to a set of physical and chemical pre-treatments (acid and alkaline). The assay shows whether the application of pre-treatments is favorable towards the enzyme hydrolysis process for the generation of fermentable sugars and for the posterior process of microbial fermentation to obtain lignin-cellulose ethanol. Results reveal that the combination of pre-treatments was better in de-lignification which is one of the impairments for the generation of lignin-cellulose ethanol. Lignin rates for sugarcane were reduced by 46.53% after pre-treatment; in the case of sawdust, reduction reached 28.45%; in the case of elephant grass, the best result was obtained with 62.16% decrease. Results on cellulose rates varied with regard to biomass: in the case of sugarcane, there was greater availability of cellulose with a 12.21% increase; in the case of the other two biomasses, pre-treatment caused a loss of available cellulose, with an 8% decrease for elephant grass and 18.62% for sawdust.

Author Biographies

Thaysi Castro Coelho Andrade, Universidade Federal do Tocantins.
Doutoranda em Biodiversidade e Biotecnologia (REDE-BIONORTE-UFT), Brasil.
Lara Neira de Siqueira, Universidade Federal do Tocantins
Mestranda em Agroenergia pela Universidade Federal do Tocantins (UFT), Brasil
Dener Alves de Souza, Universidade Federal do Tocantins
Mestrando em Engenharia Ambiental pela Universidade Federal do Tocantins (UFT), Brasil
Fabricia Vieira Silva, Universidade Federal do Tocantins
Graduada em biologia, especialista em gestão ambiental e desenvolvimento sustentável, mestre em agroenergia e Doutoranda em biodiversidade e biotecnologia, Brasil.
Patricia Martins Guarda, Universidade Federal do Tocantins
Mestre em Química pela Universidade Federal de Santa Maria (UFSM). Docente assistente do Curso de engenharia de Alimentos da Fundação Universidade Federal do Tocantins, Brasil
Emerson Adriano Guarda, Universidade Federal do Tocantins
Doutorado em Química Orgânica pela Universidade Federal de Santa Maria (UFSM). Docente adjunto da Universidade Federal do Tocantins (UFT), Brasil
Published
2018-09-27
Section
Tecnologias Limpas