Banca de QUALIFICAÇÃO: FRANCINE PIMENTEL DE ANDRADE

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : FRANCINE PIMENTEL DE ANDRADE
DATE: 30/09/2022
TIME: 14:00
LOCAL: Sala Virtual do Google Meet (https://meet.google.com/xhr-rmgo-kwr)
TITLE:

Use of microalgae and filamentous fungi in the treatment of industrial effluents (whey and petroleum produced water)

KEY WORDS:

biological treatment, secondary treatment, nitrogen remotion, oil and greasses

PAGES: 131
BIG AREA: Engenharias
AREA: Engenharia Química
SUBÁREA: Processos Industriais de Engenharia Química
SPECIALTY: Processos Bioquímicos
SUMMARY:

This work aimed to obtain information on the use of microalgae and the co-cultivation of microalgae with other microorganisms (bacteria, filamentous fungi and yeasts) in the treatment of wastewater, specifically the effluent from the dairy industry, whey, and oil industry, called produced water. A kinetic model was developed to describe the simultaneous removal of organic carbon, nitrogen and phosphorus, and microbial growth in wastewater treatment using microalgae, applying the n-order model for contaminant consumption and the Monod (one limiting substrate) and Silva and Cerqueira (multiple substrates) for microbial growth, the results demonstrated the ability of these models to predict the behaviour of the treatment of different industrial effluents. Additionally, a literature review in relation to open system cultivation revealed information about the ability to remove contaminants (mainly Chemical Oxygen Demand (COD), Total Nitrogen (TN) and Total Phosphorus (TP) present in industrial effluents by microalgae and their consortia with other microbial groups. The microalgae-bacteria consortia are mainly used due to the great capacity of removing organic matter from bacteria and removing better the nitrogen and phosphorus content by microalgae. On the other hand, lines of research using the consortium of microalgae with yeasts and filamentous fungi have gained attention, the first because yeasts can accumulate a high lipid content, as well as microalgae, and thus they can be used, for example, in the production of biodiesel, and in the case of filamentous fungi to increase the capacity of effluent treatment with organic complex molecules (fungal metabolic power is higher than microalgae) and help in the process of harvesting of microalgal biomass. But it is recognized that the biotechnological applications for these two groups can be amplified, so, research is necessary. Experimental procedure was also performed, in which the cultivation of the microalgae Tetradesmus sp. in the treatment of whey using open ponds was evaluated, this species was able to remove chemical demand of oxygen, total nitrogen and total phosphate, representing a sustainable treatment alternative, in addition to the production of microalgal biomass, with the experiments carried out at lower light intensity (25-50 µmol/(m² s)) capable of removing more COD while higher intensities removed more NT and total phosphate (100-200 µmol/(m² s)). In addition, a literature review of the biological treatment of produced water showed that there are few works when compared with other effluents, mainly due to the characteristic of this effluent because it have several xenobiotic substances, high content of oils and greases and high salinity. In this sense, physical and chemical processes are more used, although they are more effective when the treated water is used for reinjection into the wells, but due to high salinity and the presence of toxic compounds, the bioremediation of the effluent is suggested when the water can be used for other noble purposes such as irrigation. Studies were found using bacteria, microalgae, filamentous fungi and yeasts, but the first two being the most emphasis. Treatment experiments with co-culture of microalgae and filamentous fungi for the treatment of produced water in a bubble column reactor will be conducted.

BANKING MEMBERS:
Externa à Instituição - ANA KARLA DE SOUZA ABUD - UFS
Presidente - 3081569 - CARLOS EDUARDO DE FARIAS SILVA
Externa à Instituição - CRISTINA FERRAZ SILVA - UFS
Interno - 1774383 - EDUARDO LUCENA CAVALCANTE DE AMORIM
Interna - 1456420 - RENATA MARIA ROSAS GARCIA ALMEIDA