Banca de DEFESA: LOURENÇO TIBÚRCIO NETO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : LOURENÇO TIBÚRCIO NETO
DATE: 30/03/2022
TIME: 08:00
LOCAL: online
TITLE:

Methane production from anaerobic co-digestion of  vinasse and molasses

KEY WORDS:

anaerobic codigestion, methane, vinasse, monlasses

PAGES: 50
BIG AREA: Engenharias
AREA: Engenharia Sanitária
SUBÁREA: Tratamento de Águas de Abastecimento e Residuárias
SPECIALTY: Estudos e Caracterização de Efluentes Industriais
SUMMARY:

This study aimed to determine the methane production from the co-digestion of vinasse and molasses, using batch digester and sludge from UASB reactor of a domestic sewage treatment plant as inoculum. In the experiment, three factors were varied: the proportion of substrates vinasse/molasses, the COD of the substrates and the amount of alkalinizer used in each reactor. The vinasse and molasses used in the reactors were diluted until they reached the COD of 3000, 6000 and 9000 mg/L. The proportions of vinasse and molasses used were 25/75, 50/50 and 75/25. Sodium bicarbonate was used as an alkalinizer following the ratios of 0.50, 1.00 and 1.50 g/g COD. The reactors used had a useful volume of 310 ml and a reaction volume of 150 ml (approximately 50% of headspace), and were kept at a mesophilic temperature of 35 °C and under constant agitation of 120 rpm. The yield obtained in anaerobic co-digestion for methane production ranged from 33.75 - 297.85 mLCH4/gSV and the COD removal reached up to 59%. It was noted that the highest biogas productions occurred in the reactors that had less alkalinizer (0.50 gNaHCO3/g COD), which indicates that in the reactors that had more sodium bicarbonate some inhibition of methane production occurred. The values obtained indicate that the co-digestion between the two substrates is viable, however, the use of alkali compromised the analysis of the other two factors used in the research.

BANKING MEMBERS:
Presidente - 1774383 - EDUARDO LUCENA CAVALCANTE DE AMORIM
Interna - 1272239 - DANIELE VITAL VICH
Externa à Instituição - FERNANDA SANTANA PEITER - F.M.Nassau
Externa à Instituição - INAÊ ALVES - USP