Banca de DEFESA: GABRIELA MARTINS DE PAIVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : GABRIELA MARTINS DE PAIVA
DATE: 29/11/2022
TIME: 14:00
LOCAL: Sala 204 - Bloco 6 CAP/UFSJ e meet.google.com/jkw-bppu-mub
TITLE:

PRODUCTION OF BACTERIAL NANOCELLULOSE FROM WASTE BREWER'S YEAST FOR ADSORPTION AND RECOVERY OF Cu(II), Fe(III), Ni(II) and Co(II) FROM MINING EFFLUENTS

KEY WORDS:

bacterial nanocellulose;Gluconacetobacter hansenii;adsorption;optimization;mining

PAGES: 120
BIG AREA: Engenharias
AREA: Engenharia Química
SUBÁREA: Tecnologia Química
SPECIALTY: Tratamentos e Aproveitamento de Rejeitos
SUMMARY:

Brazil is one of the main producers and exporters of iron ore in the world, with a production of 358.0 million tons in the year 2021. Due to the large volume of production, there is, consequently, the generation of a large volume of liquid waste that needs be treated before being disposed of in the environment, as they have a high content of heavy metals. However, the treatments, hitherto known, are expensive and complex. An economical and environmentally viable alternative for the treatment of these residues is the use of bacterial nanocellulose as an adsorbent of the heavy metals present in the composition of the residues, due to its properties of biocompatibility and biodegradability. However, further studies are needed to increase production efficiency, changing fermentation parameters and evaluating the use of alternative substrates. The Brazilian brewing industry produces around 14.0 billion liters of beer a year and, with that, a large volume of nutritionally rich waste. With its high nutritional value, the residues are excellent substrate candidates for bacteria producing bacterial nanocellulose, adding value to them. Given this scenario, the present research project aims to (i) the static production of bacterial nanocellulose using the brewing industry waste as a substrate, (ii) the obtainment of an adsorbent composed of bacterial nanocellulose for the treatment of waste from the mining industry and (iii) recovery of heavy metals and iron oxide from mining industry effluents for reuse in industries. It was possible to obtain approximately 1532 mg of bacterial nanocellulose through the batch system. As an adsorbent, the material showed to be very promising, obtaining a maximum adsorption capacity for the metals Co (II), Ni (II) and Cu (II) of, respectively, 0.0739, 0.2504 and 0.3945 mg· g-1. For the same metals, the removal rate of the synthetic solutions studied was, respectively, 62.56, 39.13 and 61.64%

BANKING MEMBERS:
Presidente - 2255060 - IGOR JOSE BOGGIONE SANTOS
Interno - 1811284 - EDSON ROMANO NUCCI
Externa ao Programa - 276.594.398-20 - FERNANDA PALLADINO PEDROSO - UFMG
Externa à Instituição - RITA DE CASSIA SUPERBI DE SOUSA - UFV