Optimisation of sugar and solid biofuel co-production from almond tree prunings by acid pretreatment and enzymatic hydrolysis  

作　　者：Manuel Cuevas-Aranda MªLourdes Martínez-Cartas Fahd Mnasser Adnan Asad Karim Sebastián Sánchez 

机构地区：[1]Department of Chemical,Environmental and Materials Engineering,University of Jaén,Avda.de La Universidad s/n,23700 Linares,Spain [2]Olive Grove and Olive Oil Research Institute,University of Jaén,Campus de Las Lagunillas s/n,23071 Jaén,Spain

出　　处：《Bioresources and Bioprocessing》2024年第1期420-435,共16页生物资源与生物加工(英文)

基　　金：supported by the Operative Program FEDER Andalucía 2014-2020(Junta de Andalucía-MINECO-FEDER)by the grant funded 2021/00591/001;using the support to the research Action 1 of University of Jaén.

摘　　要：Almond pruning biomass is an important agricultural residue that has been scarcely studied for the co-production of sugars and solid biofuels.In this work,the production of monosaccharides from almond prunings was optimised by a two-step process scheme:pretreatment with dilute sulphuric acid(0.025 M,at 185.9-214.1℃for 0.8-9.2 min)followed by enzyme saccharification of the pretreated cellulose.The application of a response surface methodology enabled the mathematical modelling of the process,establishing pretreatment conditions to maximise both the amount of sugar in the acid prehydrolysate(23.4 kg/100 kg raw material,at 195.7℃for 3.5 min)and the enzymatic digestibility of the pretreated cellulose(45.4%,at 210.0℃for 8.0 min).The highest overall sugar yield(36.8 kg/100 kg raw material,equivalent to 64.3%of all sugars in the feedstock)was obtained with a pretreatment carried out at 197.0℃for 4.0 min.Under these conditions,moreover,the final solids showed better properties for thermochemical utilisation(22.0 MJ/kg heating value,0.87%ash content,and 72.1 mg/g moisture adsorption capacity)compared to those of the original prunings.

关 键 词：Almond tree prunings Acid hydrolysis Enzymatic hydrolysis MONOSACCHARIDES Response surface methodology 

分 类 号：O62[理学—有机化学]