Banca de QUALIFICAÇÃO: LARISSA RODRIGUES MACÁRIO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : LARISSA RODRIGUES MACÁRIO
DATE: 15/12/2023
TIME: 14:00
LOCAL: Sala virtual do Google Meet: https://meet.google.com/xhr-rmgo-kwr
TITLE:

CHEESE WHEY TREATMENT BY MICROALGA-YEAST SYMBIOSIS

KEY WORDS:

whey, microalgae, yeasts, effluent treatment.

PAGES: 72
BIG AREA: Engenharias
AREA: Engenharia Química
SUBÁREA: Processos Industriais de Engenharia Química
SPECIALTY: Processos Bioquímicos
SUMMARY:

The growth of the industrial sector, especially in the food industry, has been an important lever for economic development. However, increased production also results in large volumes of liquid and solid waste that need to be treated carefully before disposal to avoid damage to the environment, such as soil and water. In Brazil, dairy factories have experienced significant growth, but face the same challenges related to waste disposal. Whey, a by-product of cheese production, is generated in large quantities and has a high organic load, making it a potential pollutant. Studies that seek alternative solutions, such as bioremediation, have been conducted to reduce environmental contamination. In recent years, many researchers have used microalgae efficiently to bioremediate the contaminants present in whey, due to the low cost, feasibility of application and efficiency in nutrient removal, in addition to reducing the concentration of Chemical Oxygen Demand (COD). In this circumstance, this study aimed to evaluate the treatment of whey through symbiosis between the yeast Saccharomyces cerevisiae and the microalgae Tetradesmus Obliquus in a bubble column reactor. The experiment was controlled in batch mode, with different concentrations of organic loads (400, 815, 1610 and 3240) and lighting conditions (100 µmol m^-2 s^-1) and constant aeration (0.5 vvm). The results appreciated that the consortium presented greater removal efficiency, reaching removal rates of 94.07% for COD, 95.18% for total phosphorus (FT) and 83.61% for total nitrogen (NT). When yeast was used compulsively, the removal efficiencies were 78.22%, 77.56% and 58.09% for COD, NT and FT, respectively. Biomass growth in the fed consortium reached its maximum after 96 hours of experiment for all concentrations, while variations were observed in the system with yeasts, with the maximum value being reached after 72 hours for 60 mg L^-1, 96 hours for 100 mg L^-1 and 168 hours for 300 mg L^-1 and 380 mg L^-1. Therefore, bioremediation using the microalgae-yeast consortium proves to be a viable possibility to reduce the organic load and satisfy the whey to the required standards before its release into water bodies.

COMMITTEE MEMBERS:
Presidente - 3081569 - CARLOS EDUARDO DE FARIAS SILVA
Interno(a) - 1456420 - RENATA MARIA ROSAS GARCIA ALMEIDA
Externo(a) à Instituição - ANA KARLA DE SOUZA ABUD - UFS