Extractive Fermentation of Sugarcane Juice to Produce High Yield and Productivity of Bioethanol

3rd International Conference on Mathematics, Science and Education 2016

数学;自然科学;教育

Rofiqah, U.^1 ; Widjaja, T.^2 ; Altway, A.^2 ; Bramantyo, A.^2

Department of Chemical Engineering, Universitas Islam Indonesia, Jl. Kaliurang KM 14, 5, Yogyakarta, Kode Pos

55501, Indonesia^1

Department of Chemical Engineering, Sepuluh Nopember Institute of Technology, Kampus Sukolilo, Jl. Raya ITS, Surabaya, Kode Pos

60111, Indonesia^2

关键词: Batch fermentation;    Ethanol production;    Extraction process;    Extractive fermentation;    Fermentation broths;    Fermentation process;    Optimum conditions;    Sugar cane juices;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/824/1/012063/pdf
DOI  :  10.1088/1742-6596/824/1/012063

来源: IOP

【 摘 要 】

Ethanol production by batch fermentation requires a simple process and it is widely used. Batch fermentation produces ethanol with low yield and productivity due to the accumulation of ethanol in which poisons microorganisms in the fermenter. Extractive fermentation technique is applied to solve the microorganism inhibition problem by ethanol. Extractive fermentation technique can produce ethanol with high yield and productivity. In this process raffinate still, contains much sugar because conversion in the fermentation process is not perfect. Thus, to enhance ethanol yield and productivity, recycle system is applied by returning the raffinate from the extraction process to the fermentation process. This raffinate also contains ethanol which would inhibit the performance of microorganisms in producing ethanol during the fermentation process. Therefore, this study aims to find the optimum condition for the amount of solvent to broth ratio (S: B) and recycle to fresh feed ratio (R: F) which enter the fermenter to produce high yield and productivity. This research was carried out by experiment. In the experiment, sugarcane juice was fermented using Zymomonasmobilis mutant. The fermentation broth was extracted using amyl alcohol. The process was integrated with the recycle system by varying the recycle ratio. The highest yield and productivity is 22.3901% and 103.115 g / L.h respectively, obtained in a process that uses recycle to fresh feed ratio (R: F) of 50:50 and solvents to both ratio of 1.