Bioprocessing of underutilized Artocarpus altilis fruit to bioethanol by Saccharomyces cerevisiae:A fermentation condition improvement study  

作　　者：Eriola Betiku Ebenezer O Olatoye Lekan M.Latinwo 

机构地区：[1]Department of Biological Sciences,Florida Agricultural and Mechanical University,Tallahassee,32307,USA [2]Biochemical Engineering Laboratory,Department of Chemical Engineering,Obafemi Awolowo University,Ile-Ife,220005,Nigeria

出　　处：《Journal of Bioresources and Bioproducts》2023年第2期125-135,共11页生物质资源与工程（英文）

摘　　要：Raw materials availability needed for commercial bioethanol production is one of the chal-lenges against its global adoption.Identifying rich,cheap,underused,and readily available starch sources for bioethanol production could help address the problem.Thus,this current study inves-tigated the bioconversion of underutilized Artocarpus altilis(breadfruit)starch to bioethanol using Saccharomyces cerevisiae.The effects of the essential fermentation conditions(fermentation time,breadfruit starch hydrolysate(BSH)concentration,pH,and inoculum size)and their interactions on bioethanol production were investigated.The central composite design was used to generate twenty-one experiments conducted under batch fermentation conditions in the laboratory.The breadfruit starch hydrolysis led to a BSH concentration of 108.9 g/L under a starch concentration of 122 g/L,microwave output of 720 W,and an incubation time of 6 min.For the fermentation of BSH,maximum bioethanol production of 4.99%(V)was reached under the cultivation conditions of BSH concentration of 80 g/L,medium pH of 4.7,inoculum size of 2%(V),and fermentation time of 20.41 h.Except for pH,the impact of each parameter on the bioethanol production was in this order:BSH concentration,inoculum size,and fermentation time.While for the interactions amongst the parameters,the impact is in this order:BSH concentration and inoculum size;BSH concentration and fermentation time;and fermentation time and inoculum size.The results of this study indicated breadfruit starch could be hydrolyzed using acid hydrolysis and microwave irradiation in a relatively short time.The BSH obtained could potentially add to other substrates for bioethanol production.

关 键 词：STARCH Hydrolysis YEAST Fermentation BIOETHANOL BIOFUEL Optimization 

分 类 号：F426[经济管理—产业经济]