Dissertation/Thesis Abstract

Reusing Treated Municipal Wastewater for Fermentation of Ethanol Production
by Zhao, Ran, M.S., Southern Illinois University at Edwardsville, 2014, 92; 1572965
Abstract (Summary)

The bioethanol industry exerts a significant water demand. Current water consumption rate in dry grind corn-to-ethanol production is 2.7 gallons of water per gallon of ethanol production. This research was to examine the use of treated municipal wastewater (TMW) in the liquefaction and fermentation processes for ethanol production. The objective of this research was to evaluate the effects of TMW on corn starch hydrolysis, yeast reproduction and viability, as well as the final yield of ethanol and co-products. At the end of liquefaction process, concentration of sugars produced in TMW and concentration of sugars produced in deionized (DI) water were similar, which on average were 10.78 g/100mL and 9.92 g/100mL, respectively. The effects by TMW on the reproduction and viability of yeast were negative during the first 18 hours of fermentation; but were neutral or positive thereafter. Final molar yields of ethanol in TMW and in DI water were comparable at on average of 89.81% (w/w) and 87.08% (w/w), respectively. This research indicated that TMW can be used as a substitute of fresh water in liquefaction and fermentation for ethanol production, hence help to reduce water consumption of the ethanol industry.

Indexing (document details)
Advisor: Zhou, Jianpeng
Commitee: Morgon, Susan, Trupia, Sabrina, Zhou, Jianpeng
School: Southern Illinois University at Edwardsville
Department: Civil Engineering
School Location: United States -- Illinois
Source: MAI 54/03M(E), Masters Abstracts International
Subjects: Alternative Energy, Organic chemistry, Chemical engineering, Civil engineering, Water Resource Management
Keywords: Ethanol fermentation, Reusing, Treated municipal wastewater
Publication Number: 1572965
ISBN: 978-1-321-48705-3
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