Banca de DEFESA: LEONARDO DE SOUZA RAMOS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : LEONARDO DE SOUZA RAMOS
DATE: 09/05/2024
TIME: 09:00
LOCAL: Galpão da Irrigação - IT /UFRRJ
TITLE:

Performance assessment of laboratory scale bioreactors for composting experiments

KEY WORDS:

Composting, Bench scale Reactors, Differential Temperature Control, Respirometry.

PAGES: 55
BIG AREA: Ciências Agrárias
AREA: Engenharia Agrícola
SUMMARY:

Composting is a technique for treating solid residues of organic origin that allows the reinsertion in the production chain of micro and macronutrients that, in principle, are removed from the soil by the agricultural harvest, thus providing the replacement or reduction in the need for the use of organic fertilizers of synthetic nature

The study of the composting process on a full scale is often not viable given the large need for inputs (large volume of material to be composted, large physical space requirements, etc.). The present work aims to develop a base mixture of waste, with physical-chemical characteristics considered optimal in the literature, and also to propose a methodology for carrying out studies on composting in bench reactors. The experiment was carried out at the Soloteca facilities at the Federal Rural University of Rio de Janeiro (UFRRJ) and used polypropylene reactors with 3 liters of volume, upward air flow provided by BOYU® air compressors, model SC-3500 and compensation of thermal losses. via differential temperature control (CDT). The biological process was monitored by monitoring the internal temperature of the reactors and analyzing respirometry obtained with O2 sensors. Tests were carried out to determine the ideal position for the air outake of the reactors with a view to satisfactorily monitoring the biological process and evaluating the importance of the thermal loss compensation mechanism. The comparison of the decomposition values of fresh mass, dry mass, duration of the thermophilic period, duration of the period above 55°C and the areas of the temperature profile obtained in the experiment were compared with those that the literature points out as ideal for simulating the composting. The low coefficient of variation of the monitored quantities is an indicator of the predictability of the behavior of the waste mixture throughout the composting process and the robustness and reproducibility of the proposed methodology.

COMMITTEE MEMBERS:
Presidente - ***.933.757-** - CAIO DE TEVES INÁCIO - EMBRAPA
Interna - 1740899 - ERIKA FLAVIA MACHADO PINHEIRO
Externo à Instituição - MARCO ANTONIO DE ALMEIDA LEAL - EMBRAPA