Appl Biochem Biotechnol https://doi.org/10.1007/s12010-018-2790-7 Evaluation and Optimization of Organic Acid Pretreatment of Cotton Gin Waste for Enzymatic Hydrolysis and Bioethanol Production 1 1 Shitarashmi Sahu & Krishna Pramanik Received: 14 March 2018 /Accepted: 15 May 2018 Springer Science+Business Media, LLC, part of Springer Nature 2018 Abstract This paper investigates the efficiency of the organic acids on the pretreatment of an industrially generated cotton gin waste for the removal of lignin, thereby releasing cellulose and hemicellulose as fermentable sugar components. Cotton gin waste was pretreated with various organic acids namely lactic acid, oxalic acid, citric acid, and maleic acid. Among these, maleic acid was found to be the most efficient producing maximum xylose sugar (126.05 ± 0.74 g/g) at the optimum pretreatment condition of 150 °C, 500 mM, and 45 min. The pretreatment efficiency was comparable to the conventional dilute sulfuric acid pretreatment. A lignin removal of 88% was achieved by treating maleic acid pretreated biomass in a mixture of sodium sulfite and sodium chlorite. The pretreated biomass was further evaluated for the release of sugar by enzymatic hydrolysis and subsequently bioethanol production from hydrolysates. The maximum 686.13 g/g sacchar- ification yield was achieved with maleic acid pretreated biomass which
Applied Biochemistry and Biotechnology – Springer Journals
Published: Jun 2, 2018
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