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Indicators for sustainability assessment 91

Table 4.3 Operational parameters of the cellulosic ethanol plant
(Walter and Ensinas, 2010)

Parameter Value
Steam consumption (37bar) a 1.14 kg v /L ethanol
Steam consumption (2,5 bar) a 4.60 kg v /L ethanol
Electricity consumption 92.5 kWh/t bagasse
Productivity 149.3 L ethanol /ton bagasse
a
Saturated steam.

Fig. 4.10 Main mass and energy flows associated with the cellulosic ethanol production
process.

Table 4.4 Operational parameters of a cellulosic butanol plant (Nuncira, 2013)
Parameter Value
Steam consumption (12bar) a 650kg v /t bagasse
Steam consumption (2,5 bar) a 802kg v /t bagasse
Electricity consumption 18kWh/t bagasse
Productivity Butanol 57.2L butanol /t bagasse
Acetone 15.7L acetone /t bagasse
Ethanol 4L ethanol /t bagasse
Vinasse 3600L vinasse /t bagasse
a
Saturated steam.