Value addition of cotton stalks through enzymatic production of xylooligosaccharides. (26th December 2019)

• Record Type: Journal Article
• Authors: Samanta, Ashis Kumar; Chikkerur, Jayaram; Roy, Sohini; Kolte, Atul Purushottam; Dhali, Arindam; Giridhar, Kandalam; Sridhar, Manpal; Senani, Swaraj
• Is Part Of: International journal of environment and waste management. Volume 25:Number 1(2020)
• Page Start: 1
• Page End: 11
• Publication Date: 2019-12-26
• Subjects: cotton stalk -- enzymatic process -- xylan -- xylooligosaccharides -- XOS; Refuse and refuse disposal -- Environmental aspects -- Periodicals; Refuse collection -- Environmental aspects -- Periodicals; Recycling (Waste, etc.) -- Periodicals; 363.72805
• Languages: English
• ISSNs: 1478-9876

Abstract

The present work focuses on the value addition of cotton stalks through xylan extraction and enzymatic production of xylooligosaccharides (XOS); a pentose based prebiotic. Chemical analysis revealed that cotton stalk contains neutral detergent fibre 87.66%, acid detergent fibre 72.81%, hemicellulose 14.85%, cellulose 53.08%, and acid detergent lignin 19.73%. The xylan yield from cotton stalks was ranged from 1.75 to 7.36% when recovered with lithium hydroxide, while it reached up to 14% by using sodium and potassium hydroxides. The maximum recovery of xylan was attained at 4% NaOH together with steam and 8% KOH under overnight incubation. Commercial xylanase enzyme was used for enzymatic hydrolysis of xylan to produce XOS. The XOS concentration was ranged from 0.83 to maximum value of 2.19 mg/ml in the hydrolysate at pH 5.0, enzyme dose of 5 U, for 4 h of hydrolysis time. The findings substantiated the potentiality of cotton stalk as a raw material for xylan extraction vis a vis production of XOS.