Single temperature liquefaction process at different operating pHs to improve ethanol production from Indian rice and corn feedstock

V. Gohel, K. Ranganathan, G. Duan
{"title":"Single temperature liquefaction process at different operating pHs to improve ethanol production from Indian rice and corn feedstock","authors":"V. Gohel, K. Ranganathan, G. Duan","doi":"10.1080/10826068.2016.1244687","DOIUrl":null,"url":null,"abstract":"ABSTRACT Conventional grain ethanol manufacturing is a high-temperature energy-intensive process comprising of multiple-unit operations when combined with lower ethanol recovery results in higher production cost. In liquefaction, jet cooking accounts for significant energy cost, while strong acid or base used for pH adjustment presents a safety hazard. A need is felt for sustainable ethanol manufacturing process that is less hazardous, consumes lower energy, and operates in a low pH range of 4.50–5.50. A single temperature liquefaction (STL) process that could efficiently operate at lower liquefaction temperature over a pH range of 4.50–5.50 was developed using rice and corn feedstock. Ethanol recovery witnessed at pH 4.5, 5.0, and 5.5 are 481.2 ± 1.5, 492.4 ± 1.5, and 493.6 ± 1.5 L MT−1 rice, respectively. Similarly, ethanol recovery witnessed at pH 4.5, 5.0, and 5.5 are 404.6 ± 1.3, 413.9 ± 0.8, and 412.4 ± 1.8 L MT−1 corn, respectively. The improvement in ethanol recovery is attributed to higher starch conversion by alpha-amylase even at pH as low as 4.50. Thus, the STL process operated at pH lower than 5.20 is poised to enhance sustainability by offering dual advantage of energy as well as chemical saving.","PeriodicalId":20393,"journal":{"name":"Preparative Biochemistry and Biotechnology","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2017-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Preparative Biochemistry and Biotechnology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1080/10826068.2016.1244687","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1

Abstract

ABSTRACT Conventional grain ethanol manufacturing is a high-temperature energy-intensive process comprising of multiple-unit operations when combined with lower ethanol recovery results in higher production cost. In liquefaction, jet cooking accounts for significant energy cost, while strong acid or base used for pH adjustment presents a safety hazard. A need is felt for sustainable ethanol manufacturing process that is less hazardous, consumes lower energy, and operates in a low pH range of 4.50–5.50. A single temperature liquefaction (STL) process that could efficiently operate at lower liquefaction temperature over a pH range of 4.50–5.50 was developed using rice and corn feedstock. Ethanol recovery witnessed at pH 4.5, 5.0, and 5.5 are 481.2 ± 1.5, 492.4 ± 1.5, and 493.6 ± 1.5 L MT−1 rice, respectively. Similarly, ethanol recovery witnessed at pH 4.5, 5.0, and 5.5 are 404.6 ± 1.3, 413.9 ± 0.8, and 412.4 ± 1.8 L MT−1 corn, respectively. The improvement in ethanol recovery is attributed to higher starch conversion by alpha-amylase even at pH as low as 4.50. Thus, the STL process operated at pH lower than 5.20 is poised to enhance sustainability by offering dual advantage of energy as well as chemical saving.
不同操作ph下的单温度液化工艺以提高印度大米和玉米原料的乙醇产量
传统的谷物乙醇生产是一个由多单元操作组成的高温能源密集型过程,同时乙醇回收率较低,导致生产成本较高。在液化过程中,射流蒸煮消耗了大量的能源,而使用强酸或强碱调节pH值存在安全隐患。人们认为需要一种危害更小、能耗更低、在4.50-5.50的低pH范围内运行的可持续乙醇制造工艺。以水稻和玉米为原料,在pH值为4.50 ~ 5.50的低温液化条件下,开发了一种高效的低温液化工艺。在pH为4.5、5.0和5.5时,乙醇回收率分别为481.2±1.5、492.4±1.5和493.6±1.5 L MT - 1水稻。同样,在pH为4.5、5.0和5.5时,乙醇回收率分别为404.6±1.3、413.9±0.8和412.4±1.8 L MT−1玉米。乙醇回收率的提高是由于即使在pH低至4.50时α -淀粉酶也能提高淀粉转化率。因此,在pH值低于5.20的条件下运行的STL工艺可以通过提供能源和节约化学品的双重优势来增强可持续性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信