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research article

New proposal for production of bioactive compounds by supercritical technology integrated to a sugarcane biorefinery

Santos, Diego T.
•
Albarelli, Juliana Q.
•
Rostagno, Mauricio A.
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2014
Clean Technologies And Environmental Policy

The construction of a supercritical fluid extraction (SFE) plant inside or in close proximity to a sugarcane biorefinery producing first and second generation ethanol demonstrated to be very promising, increasing the economic potential of the SFE process in up to 57 %, since the SFE plant could use directly the ethanol, CO2, heat, and electricity already available, with lower prices. In this study, Brazilian ginseng roots were used as model bioactive compounds source and first the statistical influence of the extraction conditions including pressure (10-20 MPa), temperature (323-363 K), and CO2/ethanol proportion ratio (90:10, 50:50, and 0:100 %, w/w) on the beta-ecdysone content in the extracts was experimentally evaluated and compared with literature results. SFE process evaluated experimentally at the present study showed higher selective extraction for beta-ecdysone from Brazilian ginseng roots, providing an extract with up to 2.16 times higher beta-ecdysone than the results obtained in previous studies. Thermal integration of the SFE process diminished energy requirements of the process, resulting in a reduction of cold utility requirement of 87 % and a final electricity demand of 7.5 kWh/g of beta-ecdysone in the extract. In a situation in which the Brazilian ginseng roots price was increased to 4.71 USD/g, only the SFE integrated with the biorefinery solution would be economically feasible. Finally, the selling of the ginseng roots leftover could be an interesting answer to increase the economical attractiveness of the integrated SFE process to the biorefinery.

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Type
research article
DOI
10.1007/s10098-014-0760-5
Web of Science ID

WOS:000342195000023

Author(s)
Santos, Diego T.
Albarelli, Juliana Q.
Rostagno, Mauricio A.
Ensinas, Adriano V.
Marechal, Francois  
Meireles, M. Angela A.
Date Issued

2014

Publisher

Springer Verlag

Published in
Clean Technologies And Environmental Policy
Volume

16

Issue

7

Start page

1455

End page

1468

Subjects

Biorefinering

•

Biomass valorization

•

Clean technologies

•

Process integration

•

Supercritical technology

•

Bioactive compounds

Note

National Licences

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
SCI-STI-FM  
Available on Infoscience
October 23, 2014
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/107608
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