BIOGAS PRODUCTION FROM SECOND GENERATION ETHANOL VINASSE

Innovative breeds of sugar cane yield up to 2.5 times as much organic matter as conventional breeds, resulting in a great potential for biogas production. The use of biogas production as a complementary solution to conventional and second-generation ethanol production in Brazil may increase the energy produced per hectare in the sugarcane sector. Herein, it was demonstrated that through ensiling, energy cane can be conserved for six months; the stored cane can then be fed into a continuous biogas process. This approach is necessary to achieve year-round biogas production at an industrial scale. Batch tests revealed specific biogas potentials between 400 and 600 LN/kgVS for both the ensiled and non-ensiled energy cane, and the specific biogas potential of a continuous biogas process fed with ensiled energy cane was in the same range. Peak biogas losses through ensiling of up to 27% after six months were observed. Finally, compared with second-generation ethanol production using energy cane, the results indicated that biogas production from energy cane may lead to higher energy yields per hectare, with an average energy yield of up to 162 MWh/ha. Finally, the Farm2CBG concept is introduced, showing an approach for decentralized biogas production.

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Integration of Subcritical Water and Enzymatic Hydrolysis to Obtain Fermentable Sugars and Second-Generation Ethanol from Sugarcane Straw

BioEnergy Research ◽

10.1007/s12155-021-10274-4 ◽

2021 ◽

Author(s):

T. C. G. Oliveira ◽

M. A. Interlandi ◽

K. E. Hanlon ◽

P. C. Torres-Mayanga ◽

M. A. C. Silvello ◽

...

Keyword(s):

Enzymatic Hydrolysis ◽

Second Generation ◽

Subcritical Water ◽

Fermentable Sugars ◽

Sugarcane Straw ◽

Second Generation Ethanol

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Evaluating the Potential of Culms from Sugarcane and Energy Cane Varieties Grown in Argentina for Second-Generation Ethanol Production

Waste and Biomass Valorization ◽

10.1007/s12649-021-01528-5 ◽

2021 ◽

Author(s):

Aissata Ousmane Kane ◽

Vanessa O. Arnoldi Pellergini ◽

Melissa C. Espirito Santo ◽

Balla Diop Ngom ◽

José M. García ◽

...

Keyword(s):

Ethanol Production ◽

Second Generation ◽

Energy Cane ◽

Second Generation Ethanol

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Exergy efficiency of thermochemical syngas-to-ethanol production plants

SN Applied Sciences ◽

10.1007/s42452-021-04526-3 ◽

2021 ◽

Vol 3 (5) ◽

Author(s):

Marcos Paulo Gabriel da Costa e Silva ◽

Júlio Cesar de Carvalho Miranda

Keyword(s):

Ethanol Production ◽

Process Improvement ◽

Second Generation ◽

Exergy Efficiency ◽

Exergy Destruction ◽

Exothermic Reactions ◽

Production Processes ◽

Different Temperatures ◽

Exergy Analyses ◽

Second Generation Ethanol

Abstract This work presents exergy analyses applied in four different conceptual second-generation ethanol production processes through a thermochemical route using catalysts based on Molybdenum (P-1), Copper (P-2), and Rhodium (P-3 and P-4), aiming to assess their exergetic efficiencies. The results show that the conceptual processes have satisfactory exergy efficiencies in both cases, when compared among themselves and when compared with other processes reported in literature. The processes’ efficiency for P-1, P-2, P-3 and P-4 were, respectively, 52.4%, 41.4%, 43.7% and 48.9%. The reactors were the sections in which exergy destruction was more significant, due to the exothermic reactions and mixing points (where streams with different temperatures were mixed). Such results show the potential of thermochemical ethanol production, besides opening the possibilities of process improvement. Graphic abstract

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Optimization of Chemical Pretreatments Using Response Surface Methodology for Second-Generation Ethanol Production from Coffee Husk Waste

BioEnergy Research ◽

10.1007/s12155-020-10197-6 ◽

2020 ◽

Author(s):

J. L. Morales-Martínez ◽

M. G. Aguilar-Uscanga ◽

E. Bolaños-Reynoso ◽

L. López-Zamora

Keyword(s):

Response Surface Methodology ◽

Ethanol Production ◽

Response Surface ◽

Second Generation ◽

Coffee Husk ◽

Chemical Pretreatments ◽

Second Generation Ethanol

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Assessing the sugarcane bagasse and straw as a biofuel to propel light vehicles

Sustainable Energy & Fuels ◽

10.1039/d1se00129a ◽

2021 ◽

Author(s):

Rubens Eliseu Nicula de Castro ◽

Rita MB Alves ◽

Cláudio Augusto Oller Nascimento

Keyword(s):

Sugarcane Bagasse ◽

Second Generation ◽

Energy Carriers ◽

Sugarcane Production ◽

Second Generation Ethanol

Sugarcane bagasse and straw are the residues from sugarcane production. They can be used to produce electricity, second-generation ethanol, and biogas. These three kinds of fuel are energy carriers that...

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