Investigating the Interactions between Cultural Conditions in the Simultaneous Saccharification and Co-fermentation of Cassava Peels using Saccharomyces cerevisiae | Chapter 7 | Geography, Earth Science and Environment: Research Highlights Vol. 2

 

The development of cost-effective and efficient bioethanol production is essential for advancing renewable energy in Nigeria. Cassava peels, a widely available agro-waste material, provide a renewable and low-cost feedstock for bioethanol production. This study optimized bioethanol production from cassava peels by examining the impact of key process variables—pH, temperature, glucose concentration, inoculum size, and potassium nitrate—on bioethanol yield using a quadratic model and response surface methodology. Fermentation was conducted using Saccharomyces cerevisiae over a 120-hour period. The findings demonstrated that each of the key variables significantly influenced ethanol yield, with pH, temperature, glucose concentration, inoculum size, and potassium nitrate exhibiting statistically significant linear effects (p < 0.0001). Additionally, two-way interactions between these factors were also significant (p < 0.05), with temperature identified as the most influential variable on ethanol yield, closely followed by the interaction between glucose concentration and potassium nitrate. These results highlight the importance of optimizing these conditions for bioethanol production and highlight that the biochemical production of bioethanol from cassava peels is shaped by the combined effects of these variables. The study concludes that cassava peels are a promising sustainable and cost-effective feedstock for bioethanol production. Future research should explore the scalability of this optimized process for industrial applications, including pilot-scale and commercial production. Further investigation into other parameters, such as fermentation time, pressure, and alternative yeast strains, could enhance bioethanol yield. A comprehensive cost-benefit analysis and environmental impact assessment are also recommended to evaluate the economic and environmental viability of large-scale production. Government and industry stakeholders are encouraged to implement policies and incentives promoting agro-waste materials like cassava peels in renewable energy production, thereby fostering sustainability and reducing waste.

 

Author(s)details:-

 

Temidayo O. Enetanya
Federal University of Agriculture, Abeokuta, Nigeria.

 

Olusegun Oguntoke
Federal University of Agriculture, Abeokuta, Nigeria.

 

Frank A. Orji
Federal Institute of Industrial Research, Oshodi, Nigeria.

 

Sarafadeen O. Kareem
Federal University of Agriculture, Abeokuta, Nigeria.

 

Oluseyi Z. Ojekunle
Federal University of Agriculture, Abeokuta, Nigeria.

 

Chinonso I. James
Federal Institute of Industrial Research, Oshodi, Nigeria.

 

Please See the book here :- https://doi.org/10.9734/bpi/geserh/v2/3426

Experimental Investigation on Physico-chemical Properties of Bio-ethanol/Gasoline Blends and the Qualitative Effect of Different Blends on Gasoline Quality and Engine Performance | Chapter 12 | Current Strategies in Biotechnology and Bioresource Technology Vol. 2

Physico-chemical and operational properties of various gasoline bio-ethanol blends were evaluated. Bio-ethanol was obtained through distillation from maize (Zea mays), sugar cane (Saccharum L), raffia (Raffia vinefera) wine, and palm wine and then purified using a rotavapor. Engine trails involved combinations of various ratios of gasoline/bio-ethanol as fuel in a small unmodified gasoline engine connected to a dynamometer. The vapour pressure, octane number, flash point, specific gravity, and energy density of various compositions of the blends were evaluated. Sugar cane gave the highest yield of alcohol 97.99 g per kg of produce while the lowest amount of alcohol of 10.5 ml per kg of produce was obtained from palm wine. Engine power decreased from 0.400 kW with 100% gasoline as fuel to 0.108 kW with a gasoline ethanol ratio of 1: 10. The octane number increased from 93 at E10 to 106 at E90. The energy density decreased from 33.180 MJ/l at E10 to 23.600 MJ/l at E90. Other physical observations suggest that to successfully run a gasoline engine with bio ethanol/gasoline blends some modifications would have to be done on the engine, including advancing of ignition timing, provision of air tight fuel conduit network, and modification of piston heads to improve pre-combustion fuel homogenisation. 

Author(s) Details

 J. K. Tangka,
Renewable Energy Laboratory, Department of Agricultural Engineering, University of Dschang, P.O. Box 373, Dschang, Cameroon

View Book :- http://bp.bookpi.org/index.php/bpi/catalog/book/206