Development of microbial fuel cell using coffee grounds/
Alzeah J. Almodal, Joyce Ann J. Nacario, Jhashlyn Elizah R. Porca, John David S. Santos, and Reggie P. Sigua .--
- Manila: Technological University of the Philippines, 2024.
- xxxix, 279pages: 29cm.
Bachelor's thesis
College of Industrial Technology .--
Includes bibliographic references and index.
Coffee grounds are thrown away after coffee brewing and they increase the organic waste problem. Coffee grounds are still underexploited as a bioenergy source. They are considered waste and most of the time they are dumped into landfills. The main objective of this study is to aim to provide sustainable energy generation. The prototype is designed and fabricated to harness the energy potential of coffee grounds, specifically focusing on Arabica coffee grounds with less caffeine content. The construction of the battery, built with durable acrylic, ensures both resilience and an optimal environment for microbial activity. The prototype was evaluated by 40 respondents composed of electrical engineering students, college professors, and chemist. The evaluation on the performance of the developed prototype is based on the seven (7) criteria in the Technological University of the Philippines evaluation instrument, namely Functionality, aesthetic, workability, durability, economy, safety, and salability. The evaluation resulted with the overall mean of 4.39 which means Very Good. This demonstrates that the electrical potential of coffee grounds has been successfully established as a viable energy source, generating 0.62V from a single cell utilizing just 300 grams of less caffeine Arabica coffee grounds.
Keywords: microbial fuel cell, energy potential of coffee grounds, arabica coffee grounds, wastewater, microbial activity