An integrated approach to optimization of fermentation conditions for bioethanol production from local leftover Injera waste using central composite design
Journal: Environmental Health Engineering and Management Journal (Vol.9, No. 3)Publication Date: 2022-09-21
Authors : Abreham Bekele Bayu Desalegn Abdissa Akuma Ketema Beyecha Hundie;
Page : 281-293
Keywords : Bioethanol; Biomass; Environmental pollution; Fermentation;
Abstract
Background: Bioconversion of lignocelluloses to biofuel from cheap non-edible materials such as local leftover Injera waste for renewable energy is very important and minimizes environmental pollution. Local leftover Injera is an abundant, inexpensive, reusable waste to the environment, containing a sufficient amount of carbohydrate material, which is the best source of fermentable sugars. Methods: In this study, local leftover Injera was treated followed by drying, acidic hydrolysis, and alcoholic fermentation. Besides, the optimization of the fermentation process was done using a central composite box Behnken design. The process included physical and chemical pre-treatment of biomass, which was then followed by acid hydrolysis as a potential step. The scarification and fermentation methods were analyzed to acquire the maximum yield of ethanol. The local leftover Injera waste was pretreated with sulfuric acid and sodium hydroxide solutions. The effect of temperature, substrate concentration, as well pH on bioethanol production was optimized and studied. The optimization process was performed under special condition (temperature=25-40°C, pH=3-5, and substrate concentration=50-200 mg/L). Results: The maximum product of ethanol was achieved at a temperature of 32.718°C, substrate concentration of 125 g/L, and a pH of 4 with a maximum ethanol yield of 42.598%. Conclusion: According to the results, the optimum fermentation conditions for bioethanol production from local leftover Injera waste are the points where the maximum product of ethanol was achieved at a temperature of 32.718°C, substrate concentration of 125 g/L, and a pH of 4.
Other Latest Articles
- Effects of operational parameters on methyl tert-butyl ether removal by permeable reactive barrier from polluted waters
- Evaluation of adsorption efficiency of activated carbon functionalized with methyl diethanolamine in carbon dioxide gas
- The effect of the use of disinfectants during COVID-19 pandemic on the bacterial contamination of dental unit waterlines
- Arsenic and heavy metal concentrations in human hair from urban areas
- Evaluation and spatial noise mapping using geographical information system (GIS): A case study in Zaria city, Kaduna State, Nigeria
Last modified: 2022-09-24 16:01:13