Banca de QUALIFICAÇÃO: JOÃO VICTOR OLIVEIRA NASCIMENTO DA SILVA
Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.STUDENT : JOÃO VICTOR OLIVEIRA NASCIMENTO DA SILVA
DATE: 28/07/2023
TIME: 15:00
LOCAL: Sala Virtual do Google Meet (https://meet.google.com/xhr-rmgo-kwr)
TITLE:
DAIRY WASTEWATER TREATMENT USING MICROALGA AND FILAMENTOUS FUNGUS IN TUBULAR AERATED REACTOR IN SEMICONTINUOUS OPERATION MODE
KEY WORDS:
Bioremediation, microalgae-fungus consortium, semicontinuous, whey
PAGES: 61
BIG AREA: Engenharias
AREA: Engenharia Ambiental
SUBÁREA: Saneamento Básico/Esgotos/Reator Anaeróbico
SUMMARY:
The dairy sector is of fundamental importance for agribusiness, as well as for human food, and Brazil is a pioneer in its global participation, also managing to generate various derivative products such as yogurt, cheese, fermented milk, etc. The main by-product, specifically; of cheese production, is the whey, which is produced in large quantities. It is estimated that up to 10 L of whey can be generated per kilogram of processed cheese and that there is a significant polluting potential in terms of Chemical Oxygen Demand (COD), Total Nitrogen (NT) and Total Phosphorus (FT). In this sense, the biological treatment of effluents is one of the most used methods for whey, whether aerobic or anaerobic, given its high biodegradability. Microalgae have been used for the treatment of whey due to their mixotrophic capacity (autotrophic and heterotrophic) managing to assimilate organic compounds, as well as nitrogenous compounds and phosphates efficiently. In this sense, knowing that the treatment of effluents with microalgae, aiming at technical and economic feasibility, occurs in open reactors, and can be enhanced with other microorganisms. Among the advantages of symbiosis between microalgae and filamentous fungus, there is gas exchange, a result of photosynthesis and respiration, in addition to pH stabilization of the culture during treatment. There is also complementation of the degradative capacity of both species. The objective of this work is to evaluate the treatment of whey in a bubble column reactor using the microalgae-filamentous fungus symbiosis. The microalgae used will be Tetradesmus obliquus LCE-01 and the filamentous fungus will be Cunninghamella echinulata. The reactors will be initially operated in batch mode with an aeration rate of 1.5 vvm, pneumatically agitated, at 30-35ºC, evaluated under a light intensity of 100 µmol/(m2·s)), whey in 5 different concentrations (0.5, 1, 2, 4 and 8%) and then reactors under operation in semi-continuous system with feedback configuration at 20, 40, 60 and 80%. The best volumetric replacement rate, the formation of microbial mass and the residual contaminants of COD, NT and FT will be analyzed. It is expected to achieve high removal rates in a process with operational and biochemical stability, in addition to limiting the hydraulic retention time.
BANKING MEMBERS:
Presidente - 3081569 - CARLOS EDUARDO DE FARIAS SILVA
Interno(a) - 1644323 - KARINA RIBEIRO SALOMON
Externo(a) ao Programa - 3305872 - VANIA DE LOURDES DAS GRACAS TELES