Título: | POTENTIAL FOR ENERGY UTILIZATION FROM BY-PRODUCTS OF SUGARCANE CULTIVATION: A TECHNICAL-ENVIRONMENTAL ANALYSIS | ||||||||||||
Autor(es): |
RODRIGO FUCCI BERTOLETTI BECHO |
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Colaborador(es): |
FLORIAN ALAIN YANNICK PRADELLE - Orientador SERGIO LUIZ PINTO CASTINEIRAS FILHO - Coorientador |
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Catalogação: | 20/DEZ/2023 | Língua(s): | PORTUGUESE - BRAZIL |
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Tipo: | TEXT | Subtipo: | SENIOR PROJECT | ||||||||||
Notas: |
[pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio. [en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio. |
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Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/TFCs/consultas/conteudo.php?strSecao=resultado&nrSeq=65651@1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/TFCs/consultas/conteudo.php?strSecao=resultado&nrSeq=65651@2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.65651 | ||||||||||||
Resumo: | |||||||||||||
Sugarcane plays a fundamental role in the Brazilian economy, serving as a versatile
raw material that drives various sectors. In addition to being the foundation for sugar
production, a significant export product, sugarcane is essential for ethanol and
electricity generation, contributing significantly to the country s energy matrix. The
current challenge in the sector is to expand refinery production in an ecologically
responsible and sustainable manner. Efficient management of by-products from
ethanol production emerges as a crucial priority. These by-products include
bagasse, straw, vinasse, and filter cake. The first two residues can be utilized for
energy production in cogeneration systems, biogas in anaerobic biodigestion
systems, and can also be used to generate second-generation ethanol. For this latter
system, it is still possible to obtain two more by-products, lignin cake, and pentose
liquor. In order to maximize energy generation, avoid improper waste disposal, and
reduce associated environmental impacts, this study aimed to develop a technicalenvironmental analysis based on bibliographic research on the possible yields and
uses of each by-product (for the base case, scenarios 1, 2, and 3, bagasse was the
main biomass used; for scenarios 4, 5, and 6, straw was the main biomass used; in
scenarios 1 to 6, filter cake and vinasse were used for biodigestion; in scenarios 3
and 6, lignin cake and pentose liquor were used.). Using this data, different
scenarios were analyzed, consisting of combinations of sugarcane refinery byproducts, and calculations of energy metrics and environmental impacts were
conducted to determine an optimal scenario for utilizing these materials. In
conclusion, scenarios 1 and 3, when compared to the base case, yielded the best
results, with scenario 3 standing out. It demonstrated a ratio between the energy
extracted at the plant and energy inputs equal to 0.951 (0.717 for the base case),
surplus electricity generation of 234,012 MJ (113,309 MJ for the base case), emitting
193,797 kg of CO2 (163,893 for the base case). Therefore, it presented a net impact
of 0,168 kg CO2/MJ of ethanol (0,167 kg CO2/MJ of ethanol).
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