Energetic analysis of the ethanol production systems of cassava (Manihot esculenta Crantz)

Revista Brasileira de Engenharia Agrícola e Ambiental

Furlaneto, Fernanda P. B.²  Cabello, Claudio¹  Salla, Diones A.³  Kanthack, Ricardo A. D.² 

[1] UNESP, Botucatu;APTA, Assis;SEAPROF, Rio Branco

关键词: Environmental sustainability;    renewable energy;    agricultural production;    industrial processing;    carbohidrates    INTRODUÇÃO Observa-se;    nos cenários da área energética;    progressiva redução das reservas de carbono fóssil;   

DOI  :  10.1590/S1415-43662010000400015

学科分类：农业科学（综合）

来源: Universidade Federal de Campina Grande * Centro de Ciencias e Tecnologia

【 摘 要 】

This work aimed to analyze the energetic consumption of the etanol production system, using the cassava as carbohidrates source. The researches were carried out from the field in the mid region of Paranapanema river, Sao Paulo state, during the period January to December, 2007. The energy consumption referring to the phases of crop production and industrial processing were appraised. It was verified that the total energetic cost of the crop production corresponded to 9,528.33 MJ ha-1, and the most onerous item was the inputs (35.72%). In the industrial step, the energetic consumption was equivalent to 2,208.28 MJ t-1. The operations of hydrolysis/saccharification/ treatment of the juice represented 56.72% of the total energetic expenditure. The cassava crop presented an energetic cost of 1.54 MJ L-1 in relation to the etanol produced in the main agronomic operations crop production, and 11.76 MJ L-1 in the industrial processing. The energy efficiency observed in the cultivation and industrialization of the cassava was of 1.76.

【 授权许可】

CC BY-NC