Masterarbeit, 2014
99 Seiten
This thesis investigates the potential of waste coffee residue as a sustainable source for biofuel production. The study aims to determine the feasibility of converting waste coffee grounds into biodiesel, bioethanol, and solid fuel, thereby reducing waste and promoting a circular economy.
1. INTRODUCTION: This introductory chapter sets the stage for the research by establishing the context of Ethiopia's energy sector and highlighting the problem of waste coffee residue disposal. It clearly defines the research objectives, both general and specific, and emphasizes the significance of utilizing waste materials for biofuel production, contributing to sustainable development and environmental protection. The chapter effectively lays the groundwork for the subsequent chapters, outlining the research methodology and the anticipated outcomes. The justification for the study is strongly presented, emphasizing the potential environmental and economic benefits of converting waste into valuable resources.
2. LITERATURE REVIEW: This chapter provides a comprehensive overview of existing literature on biodiesel production, focusing on the transesterification process and the factors that influence its efficiency. It explores the physicochemical properties of biodiesel and the standards for quality assessment. Additionally, it details coffee production in Ethiopia and the characteristics of waste coffee residue as a potential feedstock for biofuel production. The chapter successfully integrates different aspects of biodiesel production and waste coffee residue, laying the theoretical foundation for the experimental work undertaken in the subsequent chapters. The discussion of the advantages and disadvantages of biodiesel provides a balanced perspective on its viability as a sustainable alternative fuel source.
3. MATERIALS AND METHODS: This chapter meticulously describes the materials, chemicals, and experimental procedures employed in the study. It provides a detailed account of the methods used for waste coffee residue collection, oil extraction, biodiesel production (including both esterification and transesterification steps), bioethanol production via hydrolysis and fermentation, and the analysis of the resultant solid residue for compost and solid fuel applications. Each step is clearly outlined, ensuring reproducibility of the research. The chapter adheres to a rigorous scientific approach, enhancing the credibility and transparency of the research findings.
Waste coffee residue, Biodiesel, Bioethanol, Solid fuel, Compost, Saccharomyces cerevisiae, Sustainable biofuel production, Waste management, Circular economy, Ethiopia.
This thesis investigates the potential of waste coffee residue (WCR) as a sustainable source for biofuel production. It explores the feasibility of converting WCR into biodiesel, bioethanol, and solid fuel, thereby reducing waste and promoting a circular economy.
The research aims to:
The thesis is structured into three main chapters:
The thesis details the methods used for waste coffee residue collection, oil extraction, biodiesel production (including both esterification and transesterification steps), bioethanol production via hydrolysis and fermentation, and the analysis of the resultant solid residue for compost and solid fuel applications.
The study assesses several key quality parameters of the produced biodiesel, including density, viscosity, gross calorific value, cloud point, cetane number, iodine value, flash point, water and sediment content, carbon residue, sulfated ash, and acid value.
The research is significant for Ethiopia because it addresses the problem of waste coffee residue disposal and explores the potential of utilizing this waste material for biofuel production, contributing to sustainable development and environmental protection within the context of Ethiopia's energy sector.
The research aims to demonstrate the environmental benefits of reducing waste coffee residue and the economic benefits of producing valuable biofuels from a readily available waste stream. The analysis of economic and environmental implications is a key component of the study.
Key words include: Waste coffee residue, Biodiesel, Bioethanol, Solid fuel, Compost, Saccharomyces cerevisiae, Sustainable biofuel production, Waste management, Circular economy, Ethiopia.
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