VALORIZATION OF CORN WASTE FOR THE PRODUCTION OF XYLITOL

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dc.contributor.advisorDr Devina Vaidya
dc.contributor.authorRuchi Sharma
dc.date.accessioned2024-05-14T15:21:22Z
dc.date.available2024-05-14T15:21:22Z
dc.date.issued2024-05-14
dc.description.abstractThe present study entitled, “Valorization of corn waste for the production of xylitol” was conducted in the Department of Food Science and Technology, Dr Yashwant Singh Parmar University of Horticulture and Forestry, Nauni, Solan (HP). Corn waste (corn cob (23 %) and corn sheath (16 %)) are a significant byproduct of the corn processing, often underutilized and disposed of as agricultural residues. However, these waste streams are rich in hemicellulose that can be hydrolyzed into xylitol. For isolation of hemicellulose, the efficiency of the extraction methods in terms of hemicellulose yield was evaluated. Conventional method involves traditional heating, while microwave and ultrasound methods utilize advanced energy sources to expedite the extraction process. The impact of process parameters i.e. temperature, time and NaOH on hemicellulose yield and degree of polymerization was examined by Response Surface Methodology and the ultrasound extraction method with 10.00 per cent NaOH concentration for 35.00 min at 45 ºC temperature with the yield of 82.28 per cent was optimized. The isolated hemicellulose was further subjected for fermentation for xylitol production by using two strains viz., Saccharomyces cerevisiae (MTCC 172) and Candida tropicalis (MTCC 230). Among the two strains Candida tropicalis (MTCC 230) found better for the maximum xylitol production (16.54 g/L) with 200 rpm agitation speed for 120 hours. The xylitol fermentation broth contains several impurities and to minimize the interference of the undesirable substances on xylitol recovery, the purification process was performed using activated charcoal. For purification process, optimization of process parameters through Response Surface Methodology (RSM) gave optimized conditions i.e time of 60.00 min and activated charcoal concentration 10.85 per cent and 20 ºC temperature. The liquid xylitol was further concentrated in Bucchi rotary evaporator at 50 ºC (5 folds) and undergoing lypholization and evaluated for quality and functional characteristics. However, the xylitol crystals could be stored for 21 months in LDPE and glass jars without altering the overall quality parameters. Hence, the study concluded that the growing body of knowledge on the utilization of agricultural waste for value-added product synthesis, offering a potential solution to both waste management and the demand for renewable and environmentally friendly industrial processes.
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810208978
dc.keywordsCORN
dc.keywordsPRODUCTION OF XYLITOL
dc.language.isoEnglish
dc.pages134+iii
dc.publisherUHF Nauni
dc.subFood Science and Technology
dc.themeValorization of corn waste for the production of xylitol
dc.these.typePh.D
dc.titleVALORIZATION OF CORN WASTE FOR THE PRODUCTION OF XYLITOL
dc.typeThesis
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