Banca de DEFESA: ERICKA PATRICIA LIMA DE BRITO PAIVA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : ERICKA PATRICIA LIMA DE BRITO PAIVA
DATE: 11/08/2023
TIME: 09:00
LOCAL: Pós-Graduação Engenharia Civil
TITLE:

Study on the Use of Organic Waste from the State of Pernambuco Supply and Logistics Center for the Production of Biogas

KEY WORDS:

Anaerobic Digestion, Biodegradation, Organic Waste, Biogas

PAGES: 170
BIG AREA: Engenharias
AREA: Engenharia Civil
SUMMARY:

The use of biodigesters for the treatment of organic waste aiming at the energetic use of biogas is commonly observed all over the world, especially in Europe and China, presenting nutritional results from the point of view of management, economy and environment. Thus, the importance of this study lies in evaluating the technical viability of applying anaerobic digestion technology in the treatment of fruit and vegetable waste from the Pernambuco Supply and Logistics Center (CEASA/PE) through the use of a biodigestion system in pilot scale. This system is equipped with a selection conveyor, a flute conveyor, a crusher mill, a mixing tank, two hydrolysis/acidification tanks and a methanization tank that can work in series or in parallel, a gas treatment system, a gasometer, a dryer, flaire and motor-generator group, in addition to gear pumps, piping, control panel, valves and instrumentation. As a way to subsidize the start-up and operation of this system, the following studies were carried out: (1) gravimetric composition of the residues in the four main fruit and vegetable reduction sheds of CEASA/PE (2) physical-chemical characterization of the five residues of greater than appearance observed during gravimetric compounding; (3) evaluation, through BMP tests, of the biogas generation potential of the five selected residues using anaerobic sludge and bovine rumen as inoculum; (4) evaluation of the kinetic parameters from the biogas production curves, fitting in the First Order, Modified Logistic, Modified Gompertz, Cone and Fitzhugh models; (5) evaluation of the operational stability of the biodigestion system with digestate recirculation. The initial results of the gravimetric composition showed a high percentage of pepper, tomato, orange, eggplant and leafy/vegetable residues. After the completion of the BMP assays, it was observed that, for all combinations of substrates and inoculum in BMP assays, the maximum rate of biogas generation occurred in the first 24 hours after incubation, following a tendency to stabilize and tending to 0 after the 35th day, this being the necessary duration for the complete degradation of organic substrates. In the field, the behavior of the biogas composition obtained in the system consumption 90% of CH4 throughout the study. It was thus possible to estimate that it would be possible to generate 1135.66 kWh of electricity during the period under study.

COMMITTEE MEMBERS:
Externo à Instituição - FERNANDO FERNANDES - UEL
Externo à Instituição - FRANCISCO SUETONIO BASTOS MOTA - UFC
Externa ao Programa - 1132503 - MARIA DE LOS ANGELES PEREZ FERNANDEZ - nullPresidente - 3199298 - MAURICIO ALVES DA MOTTA SOBRINHO
Externo à Instituição - SERGIO PERES RAMOS DA SILVA - UPE