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Vinasse Transport & Concentration

After separating from ethanol through distillation, vinasse is stored in lagoons before being transported via trucks, channels, or pumps to sugarcane fields using an average of 0.19 L of diesel per cubic meter. To reduce diesel use, some distilleries concentrate vinasse through a three-stage evaporative process to reduce its volume before transporting the excess to distant fields, with heat exchanges between steam-vinasse and exhaust-vinasse maintaining temperature differences of 5 and 20 degrees Celsius respectively.

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TimóteoRyoitiAdati
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12 views1 page

Vinasse Transport & Concentration

After separating from ethanol through distillation, vinasse is stored in lagoons before being transported via trucks, channels, or pumps to sugarcane fields using an average of 0.19 L of diesel per cubic meter. To reduce diesel use, some distilleries concentrate vinasse through a three-stage evaporative process to reduce its volume before transporting the excess to distant fields, with heat exchanges between steam-vinasse and exhaust-vinasse maintaining temperature differences of 5 and 20 degrees Celsius respectively.

Uploaded by

TimóteoRyoitiAdati
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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After separated from ethanol in the distillation process, vinasse is cooled and temporary stored in

lagoons to be distributed to sugarcane fields. This transport can be done by special trucks, open
channels or diesel fuelled pumps depending of the sugarcane field distance [10]. Since the
fertirrigation method can vary for each distillery, an average value of diesel consumption was
estimated using data from [10,17]. Thus, fertilization is treated as a black box model with a specific
diesel consumption of 0.19 L per m³ of vinasse transported, as shown in Fig. 1 Case 1. The specific
chemical exergy of diesel fuel was considered as 44.85 MJ/kg based on [18].
2.2. Vinasse concentration
In order to minimize diesel consumption in fertirrigation, vinasse specific volume can be reduced via
evaporative concentration. The design modelled and presented in Fig. 1 Case 2 has three stages and it
is based on the study of [11], which analysed different configurations of vinasse-juice concentration
systems. Moreover, only excess vinasse (30% of total volume flow) is concentrated to be transported
in special trucks to distant sugarcane fields. The temperature approach in heat exchanges between
steam-vinasse and exhaust-vinasse was considered 5 ºC and 20 ºC, respectively

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