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Title: Solar assisted alkali pretreatment of garden biomass: Effects on lignocellulose degradation, enzymatic hydrolysis, crystallinity and ultra-structural changes in lignocellulose

Highlights: • SAAP is an efficient and economic means of pretreatment. • SAAP was found to be efficient in lignin and hemicellulose removal. • SAAP enhanced the enzymatic hydrolysis. • FTIR, XRD and SEM provided vivid understanding about the mode of action of SAAP. • Mass balance closer of 98% for pretreated GB confirmed the reliability of SAAP. - Abstract: A comprehensive study was carried out to assess the effectiveness of solar assisted alkali pretreatment (SAAP) on garden biomass (GB). The pretreatment efficiency was assessed based on lignocellulose degradation, conversion of cellulose into reducing sugars, changes in the ultra-structure and functional groups of lignocellulose and impact on the crystallinity of cellulose, etc. SAAP was found to be efficient for the removal of lignin and hemicellulose that facilitated enzymatic hydrolysis of cellulose. FTIR and XRD studies provided details on the effectiveness of SAAP on lignocellulosic moiety and crystallinity of cellulose. Scanning electron microscopic analysis showed ultra-structural disturbances in the microfibrils of GB as a result of pretreatment. The mass balance closer of 97.87% after pretreatment confirmed the reliability of SAAP pretreatment. Based on the results, it is concluded that SAAP is not only an efficient means of pretreatment but also economicalmore » as it involved no energy expenditure for heat generation during pretreatment.« less
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [1]
  1. Solid and Hazardous Waste Management Division, National Environmental Engineering Research Institute, Nehru Marg, Nagpur 440020, Maharashtra (India)
  2. Analytical Instrumentation Division, National Environmental Engineering Research Institute, Nehru Marg, Nagpur 440020, Maharashtra (India)
Publication Date:
OSTI Identifier:
22472514
Resource Type:
Journal Article
Resource Relation:
Journal Name: Waste Management; Journal Volume: 40; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; BIOMASS; CELLULOSE; ENERGY CONSUMPTION; ENERGY EFFICIENCY; ENZYMATIC HYDROLYSIS; FOURIER TRANSFORM SPECTROMETERS; HEMICELLULOSE; INFRARED SPECTRA; LIGNIN; MASS BALANCE; SACCHAROSE; SCANNING ELECTRON MICROSCOPY; X-RAY DIFFRACTION