Balanço de massa e demanda hídrica no processo de pré-tratamento alcalino do principal resíduo cervejeiro

Autores

  • Carla Lobo Gomes Mestre em Engenharia Química Universidade Federal de Goiás, UFG, Brasil
  • Jozianny Bárbara de Almeida Mestre em Engenharia Química Universidade Federal de Goiás, UFG, Brasil
  • Dasciana de Souza Rodrigues Doutora em Engenharia Química. Embrapa Agroenergia
  • Carlos Alberto Galeano Suarez UNIVERSIDADE FEDERAL DE GOIÁS
  • Inti Doraci Cavalcanti Montano Doutor em Engenharia Química. Universidade Federal de Goiás, UFG, Brasil

DOI:

https://doi.org/10.47385/cadunifoa.v18.n53.4722

Palavras-chave:

Material lignocelulósico, Caracterização, Licor negro, Processos biotecnológicos, Bagaço de malte

Resumo

O pré-tratamento alcalino é um dos processos mais eficazes na remoção de lignina para diferentes tipos de materiais lignocelulósicos. Porém, a geração de grande quantidade de licor negro com elevado excesso de íons hidroxila (OH-), além dos efluentes gerados nas etapas de lavagem da biomassa, são alguns dos principais problemas da utilização desse tipo de pré-tratamento. Este trabalho tem como objetivo mostrar, através de um estudo de caso, o consumo de água necessário para a realização deste tipo de pré-tratamento. O resíduo de cerveja foi utilizado como material lignocelulósico para realizar o pré-tratamento alcalino com NaOH 4% e quantificar a água utilizada no processo. Um balanço de massa global durante o processo de deslignificação BSG permitiu identificar um percentual de recuperação global de 87,92% de celulose, 84,56% de hemicelulose e 87,63% de lignina do material total alimentado no processo de deslignificação. Para quantificar os principais componentes presentes no resíduo estudado, foi necessário caracterizar a água de lavagem dos sólidos obtidos no pré-tratamento. Ao final do processo, foram perdidos aproximadamente 0,50 g de celulose, 0,71 g de hemicelulose e 0,97 g de lignina em relação aos gramas alimentados, inicialmente no processo de deslignificação. A demanda de água durante o processo foi de 131,2 mL por g de material seco.

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Publicado

07-12-2023

Como Citar

LOBO GOMES, Carla; BÁRBARA DE ALMEIDA, Jozianny; DE SOUZA RODRIGUES, Dasciana; GALEANO SUAREZ, Carlos Alberto; CAVALCANTI MONTANO, Inti Doraci. Balanço de massa e demanda hídrica no processo de pré-tratamento alcalino do principal resíduo cervejeiro. Cadernos UniFOA, Volta Redonda, v. 18, n. 53, p. 1–13, 2023. DOI: 10.47385/cadunifoa.v18.n53.4722. Disponível em: https://unifoa.emnuvens.com.br/cadernos/article/view/4722. Acesso em: 21 nov. 2024.

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Tecnologia e Engenharias

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