Banca de DEFESA: CRISTIANO SANTOS DA CONCEIÇÃO JÚNIOR

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : CRISTIANO SANTOS DA CONCEIÇÃO JÚNIOR
DATE: 05/08/2014
TIME: 14:00
LOCAL: Remota
TITLE:

CONSTRUCTION AND APPLICATION OF A PROTOTYPE FOR CARBONIZATION OF WASTES FROM THE BRAZIL NUT

KEY WORDS:

Bioenergy; Drum oven; Domestic coals.

PAGES: 56
BIG AREA: Ciências Agrárias
AREA: Recursos Florestais e Engenharia Florestal
SUMMARY:

The nutshell that surrounds the almonds of the Brazil nut (Bertholletia excelsa Humn. & Bonpl) has a lignocellulosic composition and can be used to produce domestic charcoal to improve the income of extractivist communities. To do this, it is necessary to propose carbonization systems that are low-cost, durable and low-polluting. The aim of this work was to develop a low environmental impact kiln and methodologies for preparing the hedgehog to produce charcoal for domestic use. A prototype kiln was built consisting of four parts: reactor, energy chamber, carbonization chamber and drying chamber. The biomass was placed in the reactor, which consists of a 200 L drum, which in turn is introduced into the carbonization chamber for heating to approximately 450°C using external energy generated in the energy chamber. The gases produced in the reactor were directed to the energy chamber to promote feedback in the production system and, at the end, all the remaining gases were directed to the drying chamber to reduce the humidity of the biomass. The kiln was subjected to pre-tests of carbonization with other biomass until it was time to harvest the nuts, which took place in the Paru State Forest (Flona) in Pará in April 2024. Thermocouples were used to record the temperatures inside and outside the reactor. The nutshell were divided into exocarp and mesocarp. The mesocarp was tested by cutting it in half by the Brazil nut growers of Flona Paru. The material was then carbonized in the proposed system. The system reached temperatures of 350 to over 800°C, due to the configuration of its layout and feedback system. The exocarp and mesocarp charcoal had different apparent densities (0.35 and 0.68) g/cm³, dry basis moistures (14.71 and 3.40%) and volatile material contents (38.5% and 24.9%), ash (13.42% and 3.91%) and fixed carbon (33.37 and 70.53%). There was no variation between the charcoal derived from the cutting of the chestnut trees in the Paru Flona and that broken in half. The carbonization system needs to be adjusted to avoid temperature peaks above 800°C, but it is promising for Brazil nut extraction communities, as it provides nutshell charcoals that can be marketed. To do so, the exocarp must first be removed. 

COMMITTEE MEMBERS:
Presidente - 2410727 - LINA BUFALINO
Externo ao Programa - 3271139 - JONNYS PAZ CASTRO - UFRAExterna à Instituição - ROBERTA MARTINS NOGUEIRA
Externo à Instituição - ALLAN MOTTA COUTO