Bioethanol Optimization in Hydrolysis and Fermentation Process with Surface Response Method

Sari, Ni Ketut and Purbasari, Intan Yuniar and Jariyah, Jariyah (2020) Bioethanol Optimization in Hydrolysis and Fermentation Process with Surface Response Method. In: Information Technology International Seminar 2020, October 14-16, 2020, Surabaya.


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The starch content in the liquid waste of tapioca flour can be processed into glucose by chemical hydrolysis process with solid NaOH, and filtrate glucose obtained can be processed into technical bioethanol with fermentation process using turbo yeast. This study aims to produce maximum technical glucose and bioethanol with optimization in hydrolysis and fermentation processes using Minitab software with Surface Response. Before the hydrolysis process, tapioca flour's liquid waste underwent a pretreatment and filtration process to remove impurities. The hydrolysis process chemically uses solid NaOH with liquid waste tapioca flour as 5 liters and hydrolysis temperature ± 40°C. Variables in the form of solid NaOH 1 to 5 mg, and stirring time 15 to 60 minutes using digital magnetic stirrer type MS-20D. The fermentation process uses a volume of glucose filtrate 500 ml, fermentation temperature ± 30°C, and fermentation pH ±4.5, variable levels of turbo yeast 7 to 15 (% w/v) and fermentation time of 3 and 7 (days). The maximum levels obtained for glucose are 18%, and technical bioethanol is 21.9 %v/v, with the Response Surface method showing similarities to the second-order polynomial model. Keywords bioethanol, glucose, hydrolysis, fermentation, response surface method, liquid waste of tapioca flour

Item Type: Conference or Workshop Item (Paper)
Subjects: T Technology > TP Chemical technology > TP368 Food processing and manufacture
Depositing User: Fatchullah Fatchullah
Date Deposited: 28 Oct 2022 07:09
Last Modified: 28 Oct 2022 07:09

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