Banca de DEFESA: ALICE AZEVEDO LOMEU

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ALICE AZEVEDO LOMEU
DATE: 14/12/2022
TIME: 09:00
LOCAL: Plataforma on line - google meet
TITLE:

Applying ozone in cattle wastewater to maximize lipid production in microalgae biomass

KEY WORDS:

Keywords: wastewater, bioremediation, biodiesel, fatty acids

PAGES: 21
BIG AREA: Ciências Agrárias
AREA: Engenharia Agrícola
SUBÁREA: Engenharia de Água e Solo
SPECIALTY: Conservação de Solo e Água
SUMMARY:

The increased demand for energy results in an increase in fossil fuel consumption. However, the planet’s oil deposits will soon reach unsustainable levels, presenting an opportunity for biofuels. In this study, cattle wastewater (CWW) was used to cultivate a microalgae consortium in photobioreactors. Seven rounds of experiments were carried out with the addition of CO₂ (ControlCO₂), ozone application for 10, 20 and 30 minutes (O₃T10, O₃T20 and O₃T30) and a combination of CO₂ and ozone (O₃T10CO₂ and O₃T20CO₂). Maximum dry biomass (18.63 g L^-1) and CO₂ biofixation (8,047.79 mg L^-1 d^-1) were obtain in O₃T20CO₂. 48% of lipid was registered in O₃T30 and O₃T20, indicating that microalgae were stressed when exposed to ozonized wastewater. C16:0 was detected in higher concentrations in all experiments. O₃T30, O₃T10CO₂ and O₃T20CO₂ had values for C18:3 in accordance with the requirements of EN 14214. Removals of up to 100% for NH₃-N, 99.6% for P and 91.7% for COD were recorded. The data indicates a possibility for CWW bioremediation and biofuel production in significantly quantity and quality in comparison to the current scenario of microalgae cultivation.

COMMITTEE MEMBERS:
Interno - 2131822 - CONAN AYADE SALVADOR
Interno - 1133133 - HENRIQUE VIEIRA DE MENDONCA
Externa à Instituição - PAULA PEIXOTO ASSEMANY - UFLA