Banca de DEFESA: GEORGIA NAYANE SILVA BELO GOIS

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : GEORGIA NAYANE SILVA BELO GOIS
DATE: 16/11/2023
TIME: 09:00
LOCAL: Sala do conselho do Centro de Tecnologia
TITLE:

 Co-digestion of BRS-Capiaçu elephant grass broth with swine effluent aiming at methane production


KEY WORDS:

methane, anaerobic co-digestion, Simplex Lattice planning, BRS-Capiaçu elephant grass.


PAGES: 98
BIG AREA: Engenharias
AREA: Engenharia Química
SUMMARY:
Lignocellulosic biomass and agricultural residues rich in carbohydrates, lipids and proteins are promising sources for the production of renewable energy that are currently growing in the area of biofuel production. Analyzing the Brazilian agricultural and industrial market, there is a growing production of elephant grass and the consumption of pork. The juice of elephant grass and the effluent of swine farming, for presenting high levels of carbohydrate and nitrogen, can represent a favorable combination for the process of anaerobic codigestion aiming at the production of biogas. The objective of this study is to carry out the co-digestion of elephant grass (BRS-Capiaçu) (CC) and swine effluent (ES) to produce methane. With this, in a first step (E1) the experimental design of the Simplex Lattice type was applied in benchtop reactors in batch mode. Different proportions of the mixture (CC0/ES100, CC20/ES80, CC40/ES60, CC60/ES40, CC80/ES20, CC100/ES0) were evaluated by adjusting the linear and quadratic models. In E1, the results showed carbohydrate removal efficiency between 42.00 and 72.48%, COD between 18.78 and 53.82% and SVT between 34.81 and 54.78%. Co-digestion was favorable for the production of CH4, maximum values of 3921.90 mL-CH4/g-CODapl and 98.11 mL-CH4/(g-DQOapl.d) were obtained, both observed in the CC20/ES80 condition. The reactors CC40/ES60, CC60/ES40 showed similar results among themselves 3432.70 mL-CH4/g-CODapl and 3446.69 mL-CH4/g-CODapl, respectively. The quadratic model had the best fit (R2 equal to 0.92 and 0.94 for yield and methane production rate, respectively). The second stage (E2) will also be carried out in batch reactors, aiming at the production of methane, where the effect of the initial substrate concentration (COD), alkalizing concentration (NaHCO3) and the two best CC/ES compositions verified in E1.

COMMITTEE MEMBERS:
Presidente - 1774383 - EDUARDO LUCENA CAVALCANTE DE AMORIM
Interno(a) - 3081569 - CARLOS EDUARDO DE FARIAS SILVA
Interno(a) - 3731108 - LIVIA MARIA DE OLIVEIRA RIBEIRO
Interno(a) - 3182573 - RODOLFO JUNQUEIRA BRANDAO
Externo(a) à Instituição - FERNANDA SANTANA PEITER - F.M.Nassau
Externo(a) à Instituição - NORMA CANDIDA DOS SANTOS AMORIM - CEFET-Al
Notícia cadastrada em: 16/11/2023 13:32
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