Microwave Assisted Alkaline Pretreatment of AlgaeWaste in the Production of Cellulosic Bioethanol
No Thumbnail Available
Date
2021-09-17
Journal Title
Journal ISSN
Volume Title
Publisher
Energies, 2021, 14, 5891
Abstract
Biomass pretreatment has an important role in the production of cellulosic bioethanol. In
this study, the effectiveness of microwave assisted alkaline pretreatment of algae waste was analysed.
After pretreatment, the product was hydrolysed using sulphuric acid. The effects of microwave
power, irradiating time, solid–liquid ratio and NaOH concentration were examined. Under the
best conditions, the fermentable sugars were converted to cellulosic bioethanol using Saccharomyces
Cerevisiae with a bioethanol yield of 1.93 0.01 g/g and a fermentation efficiency of 40.4%. The
reducing sugars concentration was 30% higher than that obtained from conventional hydrolysis
without pretreatment. The obtained results suggest that microwave assisted alkaline pretreatment is
effective in improving the production of cellulosic bioethanol of algae waste compared to that without
microwave effect. Considering energy consumption, low microwave power and short microwave
irradiation time are favourable for this pretreatment.
Description
Keywords
industrial waste; microwave pretreatment; acid hydrolysis; bioethanol; energy consumption