Arab Universities Journal of Agricultural Sciences (Aug 2021)
Impact of Microbial Synergism on Second Generation Production of Bioethanol from Fruit Peels Wastes
Abstract
Fruit peels annually accumulate in huge amounts, fruit wastes are rich in lignocellulo-sic component which can be recovered into mono simple carbohydrates able to utilize for bioethanol production. The enzymatic hydrol-ysis of lignocelluloses is known to be a key to the second-generation biofuel, the challenge is the still expensive enzymes involved in the saccharification process, loss of the most hem-icellulose pentose sugars which were non-fer-mentable as base, beside the presence of ham-pers lignin thus require to resolve its problem.As part of study, followed the cost-effective means for bioethanol producing from four fruit peels (Banana, Orange, Mango and Water-melon), yielding of enzymes from co-fungal cultivation carried by Aspergillus niger and Phanerochaete chrysosporium, followed by co-fermentation of the saccharified sugars us-ing yeast belong to Saccharomyces cerevisiae and Kluyveromyces marxianus which contrib-uted for bioethanol production in 8 L lab-scale reactor. The fermented sugars recovering was reached to 27.77 g.l-1 from banana peels which were found to be good exploited as potential raw source, co-fungal enzymatic hydrolysis followed by yeast co-fermentation led to sub-stantial yield by 10.74 g.l-1, the adding of calcium oxide increased the purity which leads finally to 97.5 wt % of pure bioethanol. Thrust towards fossil fuels replacement with renewa-ble clean fuels such as bioethanol by using fruit peels residuals which are considered renewa-ble energy source may also help in CO2 miti-gation.
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