Banca de QUALIFICAÇÃO: KAYO LUCAS BATISTA DE PAIVA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : KAYO LUCAS BATISTA DE PAIVA
DATE: 17/04/2026
TIME: 08:00
LOCAL: google meet
TITLE:

INNOVATION IN TANNIN EXTRACTION FROM FOREST SPECIES: A SUSTAINABLE APPROACH FOR WATER TREATMENT APPLICATIONS

KEY WORDS:

natural coagulants, energy efficiency, phenolic compounds, flocculation process, technological innovation

PAGES: 63
BIG AREA: Ciências Agrárias
AREA: Recursos Florestais e Engenharia Florestal
SUBÁREA: Tecnologia e Utilização de Produtos Florestais
SPECIALTY: Anatomia e Identificação de Produtos Florestais
SUMMARY:

This study evaluated alternative methods for extracting condensed tannins from the bark of Mimosa tenuiflora (Willd.) Poir. (jurema preta), Anacardium occidentale Linn. (cashew tree), and Anadenanthera colubrina (Vell.) Brenan (red angico), with the aim of developing a sustainable and energy-efficient process, as well as investigating the potential of tannins extracted through these methods as natural coagulants for water treatment. Extraction methods based on boiling and mechanical stirring were compared at different times and stirring speeds, analyzing the condensed tannin content, Stiasny index, total solids, and energy consumption. Boiling showed higher overall tannin yields, obtaining values of 23.72% for jurema preta and 18.18% for red angico, whereas mechanical stirring stood out for its energy efficiency, operational simplicity, and the production of more reactive extracts. The 1-hour extraction time proved most suitable, as the energy consumed in a single 1-hour boiling extraction would allow approximately 47 extractions using mechanical stirring at 300 rpm. In the coagulation assays, the natural coagulants obtained by mechanical stirring and boiling showed efficiency comparable to or greater than ferric chloride, reducing water turbidity to levels consistent with drinking-water standards (5 NTU) while maintaining pH within the ideal range (6.0–9.0). The results indicate that mechanical stirring and tannin-based natural coagulants constitute viable, sustainable, and low-impact alternatives, reinforcing the potential of native Caatinga species as renewable sources of high value-added biomolecules.

COMMITTEE MEMBERS:
Interno - 1079298 - ALEXANDRE SANTOS PIMENTA
Interna - 3081596 - ELAINE CRISTINA ALVES DA SILVA
Externo à Instituição - JOÃO GILBERTO MEZA UCELLA FILHO - UFV
Presidente - 2326526 - TATIANE KELLY BARBOSA DE AZEVEDO CARNAVAL