Banca de DEFESA: KAREN DANIELA RIOS RAMIREZ

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : KAREN DANIELA RIOS RAMIREZ
DATE: 26/07/2023
TIME: 09:00
LOCAL: Instituto de Geociências - Plataforma Zoom
TITLE:

CULTIVATION OF MICROALGAE TO REMOVE CONTAMINANTS AND SIMULTANEOUS BIOMASS PRODUCTION WITH BIOENERGETIC POTENTIAL

KEY WORDS:

Biogeochemistry, phycoremediation, agroindustrial effluent, toxic pollutants, bioenergy

PAGES: 33
BIG AREA: Ciências Exatas e da Terra
AREA: Oceanografia
SUBÁREA: Oceanografia Biológica
SPECIALTY: Interação entre os Organismos Marinhos e os Parâmetros Ambientais
SUMMARY:

In the current scope of the circular bioeconomy, microalgae cultures play a fundamental role in the use of nutrients and organic material present in industrial and agro-industrial effluents. Microalgae can be efficient in removing toxic compounds such as Polycyclic Aromatic Hydrocarbons (PAHs). In addition to the removal of pollutants, the cultivation of microalgae in effluents can also result in the production of biomass with the potential to generate biohydrogen. Biohydrogen is a renewable energy source that can be obtained from the gasification of microalgae biomass. Therefore, this research evaluated the efficiency of removal of PAHs, present in effluents from industry (petroleum produced water - OPW) and agroindustry (poultry effluent water - PEW), through the cultivation of microalgae in an Airlift photobioreactor, as well as the production of biomass with bioenergetic potential after removal. Four mesoscale cultures were carried out: Control, without the presence of PAHs - Seawater (SW) 100% + Conway medium; Treatment A - PEW 50% + OPW 50%; Treatment B - PEW 50% + SW 50%; and Treatment C - 50% OPW + 50% SW + 80 mL Conway medium + 11.20 g K2PO4 + 1.50E-2 g NaNO3. After carrying out the cultures, it was found that the highest PAHs removal efficiency (90.94%) was obtained in Treatment C (OPW 50% + SW 50%). This treatment was carried out with biostimulation by adding NO3 and PO4. Low molecular weight PAHs were removed more efficiently, with naphthalene having the highest percentage of removal (98.63%), followed by fluorene (91.58%). The second highest removal of PAHs was observed in Treatment A (82.32%) (PEW 50% + OPW 50%). In this treatment, naphthalene and fluorene were also the compounds removed in greater proportion (98.23% and 96.07%, respectively). Regarding biomass production, the highest amount was obtained in Treatment C (393.2 mg L-1 ), followed by Treatment B (317.66 mg L-1 ), while the lowest amount was observed in Treatment A (208 .10 mg L1 ). The research demonstrated an efficient strategy for removing PAHs present in industrial and agro-industrial effluents, with simultaneous production of high added value biomass.

COMMITTEE MEMBERS:
Presidente - 3897782 - ICARO THIAGO ANDRADE MOREIRA
Interna - 2322888 - OLIVIA MARIA CORDEIRO DE OLIVEIRA
Externa ao Programa - 3495808 - KAREN VALVERDE PONTES VATER - UFBA