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Title: Applications of nonconventional green extraction technologies in process industries: challenges, limitations and perspective
Authors: Fomo, Gertrude 
Madzimbamuto, Tafirenyika Nyamayaro 
Ojumu, Tunde Victor 
Keywords: Green extraction technology;value-added compounds;process industries;ionic liquids
Issue Date: 2020
Publisher: MDPI
Source: Fomo, G., Madzimbamuto, T.N. & Ojumu, T.V. 2020. Applications of nonconventional green extraction technologies in process industries: challenges, limitations and perspective. Sustainability, 12(13): 5244. []
Journal: Sustainability 
Abstract: This study reviewed five di erent nonconventional technologies which are aligned with green concepts of product recovery from raw materials on industrial scale, with minimal energy consumption and chemical use. Namely, this study reviewed supercritical fluid extraction (SCFE), pressurized liquid extraction (PLE), microwave-assisted extraction (MAE), ultrasound extraction (UAE) and pulsed electric fields extraction (PEFE). This paper provides an overview of relevant innovative work done in process industries on di erent plant matrices for functional value-added compounds and byproduct production. A comparison of the five extraction methods showed the supercritical CO2 (SC-CO2) process to be more reliable despite some limitations and challenges in terms of extraction yield and solubility of some bioactive compounds when applied in processing industries. However, these challenges can be solved by using ionic liquids as a trainer or cosolvent to supercritical CO2 during the extraction process. The choice of ionic liquid over organic solvents used to enhance extraction yield and solubility is based on properties such as hydrophobicity, polarity and selectivity in addition to a safe environment.
ISSN: 2071-1050
Appears in Collections:Eng - Journal articles (DHET subsidised)

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