Banca de QUALIFICAÇÃO: ALICE AZEVEDO LOMEU

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : ALICE AZEVEDO LOMEU
DATE: 25/11/2021
TIME: 14:00
LOCAL: Ambiente Virtual
TITLE:

BIODIESEL PRODUCTION FROM TREATMENT OF CATTLE WASTEWATER WITH A MIX OF MICROALGAE

KEY WORDS:

Keywords: biofuels, wastewater treatment, CO2 biofixation.

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

Climate change has been causing more and more impacts on the planet and in our society. Therefore, it is imperative that new technologies are developed not only to mitigate the existing environmental damage, but also to prevent new ones. To this end, this paperwork aims to use the dairy wastewater as culture medium for microalgae in photobioreactors and generate bioproducts. The wastewater (WW) was pre-treated by decantation and an inoculum was used with a microalgae mix containing Arthrospira platensis DHR 20, Chlorella sp., Scenedesmus sp. and Euglena sp.. Seven experimental conditions were analysed, being: control, where there were no interventions, control CO2, where there was addition of CO2 in the photobioreactors, WW previously ozonated for 10 minutes (O3T10), WW previously ozonated for 20 minutes (O3T20), WW previously ozonated for 30 minutes (O3T30), WW previously ozonated for 10 minutes with the addition of CO2 (O3T10CO2) and WW previously ozonated for 20 minutes with the addition of CO2 (O3T20CO2). The wastewater quality was determinate by laboratory analysis. The kinetic parameters were determinate for the photobioreactors, doubling time and specific growth rate. The extraction of lipids, proteins and carbohydrates will be made in order to estimate the biofuels yields from the biomass produced. Lastly, the CO2 biofixation will be determinate based on the carbon concentration present in the biomass. Preliminary results shown that the treatments removed nutrients, especially total nitrogen and ammonium nitrogen. Moreover, the ozonation process shown a tendency of decreasing the doubling time, which can entail to smaller areas for the photobioreactors. Nevertheless, further analysis of the results will be carried out in the next stages of this study. With the percentage of the lipids, protein and carbohydrates, the biofuels yields will be estimate. Once determinate the concentration of carbon present in the biomass, the CO2 biofixation will be calculated. At the end of the study, it is expected to obtain results that will contribute to the bioeconomy and circular economy, with the generation of biofuels produced from dairy wastewater treated with microalgae.

BANKING MEMBERS:
Presidente - 1133133 - HENRIQUE VIEIRA DE MENDONCA
Interna - 2353141 - LEONARDO DUARTE BATISTA DA SILVA
Externo à Instituição - OTAVIO EURICO DE AQUINO BRANCO - UFJF