Bioethanol production in vacuum membrane distillation bioreactor by permeate fractional condensation and mechanical vapor compression with polytetrafluoroethylene (PTFE) membrane.
Bioresour Technol
; 268: 708-714, 2018 Nov.
Article
en En
| MEDLINE
| ID: mdl-30145378
ABSTRACT
A vacuum membrane distillation bioreactor (VMDBR) by permeate fractional condensation and mechanical vapor compression with PTFE membrane was developed for bioethanol production. Cell concentration of 11.5â¯g/L, glucose consumption rate of 5.2â¯g/L/h and ethanol productivity of 2.3â¯g/L/h could be obtained with fermentation continues lasting for 140â¯h. Membrane flux of over 10â¯kg/m2/h could be obtained for model solution separation. Higher temperature and flow rate could promote membrane separation. Membrane flux could be reduced to about 2000â¯g/m2/h with fermentation proceeding owing to the deposited cell on membrane surface. The membrane separation performance could be resumed by water rinse. High ethanol concentration of 421â¯g/L could be obtained by permeate fractional condensation with the process separation factor increased to 19.2. Energy of only 14â¯MJ/kg was required in VMDBR and the energy consumption would be reduced further if the compressed vapor could be used to heat the feed.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Politetrafluoroetileno
/
Reactores Biológicos
/
Membranas Artificiales
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Bioresour Technol
Asunto de la revista:
ENGENHARIA BIOMEDICA
Año:
2018
Tipo del documento:
Article
País de afiliación:
China