Banca de DEFESA: RODRIGO MIRANDA PIRES SANTOS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : RODRIGO MIRANDA PIRES SANTOS
DATE: 14/10/2022
TIME: 14:00
LOCAL: Sessão Privada na Plataforma Conferência Web (https://conferenciaweb.rnp.br/webconf/ppgbiotec-ufba)
TITLE:

EVALUATION OF THE EFFECT OF THE APPLICATION OF ELECTRIC CURRENT ON MICROAMPERATION DURING ALCOHOLIC FERMENTATION BY Saccharomyces cerevisiae

KEY WORDS:

Eletromodulation; Bioethanol; Yeast

PAGES: 48
BIG AREA: Outra
AREA: Multidisciplinar
SUMMARY:

Bioethanol is a compound traditionally produced from the fermentation of fermentable sugars. Different substrates can be used for this purpose. Bioethanol produced from lignocellulosic substrates is second and third generation ethanol. In the production of this bioproduct, microorganisms such as Zymomonas mobilis, Clostridium thermocellum and Saccharomyces cerevisiae can be used. The latter, in turn, is the most used organism for this purpose. Ethanol production can have different applications, such as the production of beverages, whether fermented and/or distilled, or even in the production of biofuels. In this sense, methods of optimizing the production of bioethanol becomes relevant. Different stimulus methods have been tested in order to achieve this objective, such as the application of light. Thus, the objective of the present work was to evaluate the effect of the application of electric currents in microamperages on Saccharomyces cerevisiae during alcoholic fermentation. Therefore, bioreactors capable of applying electric currents in the culture medium containing yeasts. The currents used were 1Hz and 50Hz, with intensities of 250µA, 500µA, 750µA and 990µA, so 8 experimental groups were tested and a control group where there was no application of electric currents. Electric currents with 1Hz modulation showed a reduction in ethanol production proportional to the increase in amperage. However, at the frequency of 50Hz an opposite effect was observed. In this modulation, the intensity of 990µA presented the greatest difference in relation to the control group. This difference was statistically significant in relation to the control. Then, this current of 50Hz and 990µA was selected and tested in 20L bioreactors and even in this case the significance was maintained. Therefore, it was concluded with this work that the use of electric currents can increase the production of bioethanol.

BANKING MEMBERS:
Externo à Instituição - ELIAS RAMOS DE SOUZA
Externo ao Programa - 1145664 - JAILTON DE AZEVEDO SILVA JUNIOR
Interna - 3530637 - JOSILENE BORGES TORRES LIMA MATOS
Presidente - 6285556 - PAULO FERNANDO DE ALMEIDA