Abstract
The objective of this study was to evaluate the effects of sugarcane juice treatment using Moringa oleifera leaf and seeds extracts on ethanolic fermentation. The experiment was arranged in a split plot statistical design, with four replications. Main treatments were three sedimentation agents (synthetic polyelectrolyte, moringa leaf and seed extracts) and control while the secondary treatments were two sugarcane varieties (RB867515 and CTC4). Extracted sugarcane juice was clarified by simple defecation with pH adjusted to 6.0. The flocculating agents were added in a decanter before the limed juice. After then, the juice was standardized to 16° Brix at pH 4.5, and musts were inoculated with yeast Saccharomyces cerevisiae strain, FT858. At the end of the fermentation process, wines were recovered by centrifugation. In all experimental stages, extracted juice, clarified juice and wine were chemically and technologically characterized. The use of moringa leaf and seed extracts as sedimentation adjuvants did not increase the sedimentation speed of impurities. However, there was a high sludge compaction, which was essential for maintenance of yeast and bud population at the beginning of fermentation, and yeast budding rate in the end. The use of different sedimentation agents as adjuvants in juice treatment did not affect wine quality and ethanol yield. Keywords: Juice clarification, Moringa oleifera Lamarck, simple defecation, polyelectrolyte, flocculating agents, saccharomyces cerevisiae African Journal of Biotechnology , Vol 13(42) 4124-4130
Highlights
Moringa a extra acts us sed in sugarc cane ju uice trreatment and d efffects on o etha anolic fermentation n
The juice of two sugarcane varieties; RB867515 and CTC4, both ripening between July and September, was extracted
The raw material was analyzed for total soluble solids (Brix), sucrose content (Pol), purity, reducing sugars (RS), total reducing sugars (TRS), cane fiber, pH, total acidity, soluble ashes (CTC, 2005) and total phenolic compounds (TPC) (Folin and Ciocalteu, 1927)
Summary
Moringa a extra acts us sed in sugarc cane ju uice trreatment and d efffects on o etha anolic fermentation n. The objectiv ve of this stu udy was to ev valuate the efffects of sug garcane juice e treatment u using Moringa oleifera leaf and see eds extracts on ethanolic c fermentatio on. Main treatments t were w three sed dimentation agents (syntthetic polyele ectrolyte, moringa le eaf and seed d extracts) and control while the secondary ttreatments w were two sugarcane varieties Ex xtracted sugarcane juice e was clarifie ed by simple defecation n with pH adjusted to o 6.0. The use of moringa leaf and see ed extracts a as sedimenttation adjuva ants did not increase the sedime entation spe eed of impurities. The use of o different sedimentatio s on agents as adjuvants in juice treattment did not affect wine w quality and a ethanol yield. Eth hanol is one of the mosttly produced biofuels in the t worrld, with the United
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