Banca de QUALIFICAÇÃO: JAMILA SUEIRA DE JESUS SILVA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : JAMILA SUEIRA DE JESUS SILVA
DATA : 17/09/2021
HORA: 17:00
LOCAL: Faculdade de Farmácia
TÍTULO:

Synergistic effect of light and chemical stress on Chlorella vulgaris grown in produced water: high biomass and biomolecules production

PALAVRAS-CHAVES:

Microalgae, cyanobacteria, produced water, bioproducts and biochemical manipulation

PÁGINAS: 31
GRANDE ÁREA: Ciências Agrárias
ÁREA: Ciência e Tecnologia de Alimentos
SUBÁREA: Ciência de Alimentos
ESPECIALIDADE: Química, Física, Fisico-Química e Bioquímica dos Alim. e das Mat-Primas Alimentares
RESUMO:

Produced water (AP) is the effluent resulting from the injection of seawater into wells for oil extraction. It is a wastewater with a significant environmental impact, due to its high salinity, presence of chemical compounds, and growing demand for fossil fuels. Thus, new environmental technologies are being developed to reduce their impact. Microalgae have been considered promising to phytoremediation this effluent, reducing the impact caused and producing biomass with high added value. Given the above, the objective of this study was to increase the production of biomass and biomolecules of the microalgae Chlorella vulgaris cultivated in produced water, through the synergistic effect of two sources physical and chemical stress. The microalgae were cultivated in different concentrations of AP (not autoclaved) and BG11 (0, 30, 40, and 50%), under a 24-hour photoperiod, with an inoculum pre-adapted to the same photoperiod. Among the treatments, the culture containing 70% of BG and 30% of AP (AP30%), showed viability with biomass production of 1.35 gL-1. The biomass obtained in AP30% showed a higher concentration of carbohydrates (37.46%) and ash (18.21%) than the control. In addition to relevant levels of lipids (9.92%), proteins (21.94%) and pigments such as chlorophyll a (6.64 μg mL-1), chlorophyll b (10.57 μg mL-1), and carotenoids (21.38 µg mL-1). The fatty acid profile presented as major acids C18:3n6 (21.50%), C20:0 (19.96%), C16:0 (17.12%), and C18:0 (12.15%), this accounted for approximately 70% of the total. As for biofuels, the diversity of fatty acids presented an ideal profile for the production of biodiesel, in addition to bioethanol (17.02 mL 100g-1) which can be obtained from carbohydrates. Therefore, the adaptation of the inoculum to the 24-hour photoperiod acted synergistically with AP, favoring the final production of biomass and the synthesis of biomolecules by the microalgae.

MEMBROS DA BANCA:
Interna - 1350842 - JANICE IZABEL DRUZIAN
Externa ao Programa - 023.961.920-00 - KRICELLE MOSQUERA DEAMICI - FURG
Externa à Instituição - JÉSSICA HARTWIG DUARTE - UFRN