Production of bio ethanol from waste potatoes

2nd International Conference on Advances in Energy Resources and Environment Engineering

能源学;生态环境科学

Noufal, Mohamad Jaber^1,2 ; Li, Baizhan^1 ; Maalla, Zena Ali^1,2

Faculty of Urban Construction and Environmental Engineering, Chongqing University, 174 Shazhengjie, Shapingba District, Chongqing City

400045, China^1

Faculty of Civil Engineering and Environmental Engineering, Al-Baath University, Homs City, Syria^2

关键词: Alpha amylase;    Ethanol production;    Fermentation process;    Fermentation time;    Optimal values;    Potato starches;    Potato tubers;    Solid-liquid ratio;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/59/1/012006/pdf
DOI  :  10.1088/1755-1315/59/1/012006

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In this research, production of ethanol from waste potatoes fermentation was studied using Saccharomyces cerevisiae. Potato Flour prepared from potato tubers after cooking and drying at 85°C. A homogenous slurry of potato flour prepared in water at solid-liquid ratio 1:10. Liquefaction of potato starch slurry was done with α-amylase at 80°C for 40 min followed by saccharification process which was done with glucoamylase at 65°C for two hr. Fermentation of hydrolysate with Saccharomyces cerevisiae at 35°C for two days resulted in the production of 33 g/l ethanol. The following parameters have been analysed: temperature, time of fermentation and pH. It found that Saccharification process is affected by enzyme Amylase 300 concentration and concentration of 1000μl/100ml gives the efficient effect of the process. The best temperature for fermentation process was found to be about 35°C. Also, it noticed that ethanol production increased as a time of fermentation increased but after 48 hr further growth in fermentation time did not have an appreciable effect. Finally, the optimal value of pH for fermentation process was about 5 to 6.