An integrated approach to optimization of fermentation conditions for bioethanol production from local leftover Injera waste using central composite design
Journal Title: Environmental Health Engineering and Management Journal - Year 2022, Vol 9, Issue 3
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.
Authors and Affiliations
Abreham Bekele Bayu, Desalegn Abdissa Akuma, Ketema Beyecha Hundie
Keywords
Related Articles
- EP ID EP709430
- DOI 10.34172/EHEM.2022.29
- Views 84
- Downloads 0
Root cause analysis (RCA), a little-known tool for medical errors pathology during the COVID-19 pandemic
This article has no abstract.
Comparison ability of algae and nanoparticles on nitrate and phosphate removal from aquaculture wastewater
Background: Aquaculture wastewater contains high levels of phosphate and nitrate. The reuse of this water requires standards beyond the secondary standards to eliminate more organic pollutants from aquaculture effluents....
Swot analysis of factors causing air pollution and recommended control efforts in the city of Yogyakarta, Indonesia
Background: Knowing the root causes of air pollution in urban areas will determine the next actions to take. Analyzing the impact caused by air pollution will make it easier to determine the control efforts to be carri...
Microbiological contamination of commercial enteral feeding and blenderized tube feeding: A systematic review
Background: All types of enteral feeding (EF) formulations, whether blenderized tube feeding (BTF) at hospital kitchen, or commercial enteral feeding (CEF), contains nutrients. The nature of these foods (in terms of pH...
Biomonitoring of heavy metal signatures in urbanized contaminated ecosystems of Southern India: A case study using raptor, Athene brama
Background: Heavy metals remain tenacious in the environment which further leads to emerging bioaccumulation, rising through the food chain. Birds are great environmental sentinels that can spot even the smallest chang...