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This study explores the conversion of agro wastes (tomatoes, banana, pineapple fruits and peels) to bioelectricity using single chamber microbial fuel cells (SMFCs). The results show that higher substrate quantities produce higher electricity outputs. The study demonstrates the potential of SMFCs in generating green energy from fruit wastes.

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What they did

System
MFC

What worked

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Abstract

Green Chemistry is gaining prominence in environmental and technological processes. Generating electricity from agro wastes comprising of waste vegetables and fruits are new sources of clean energy. Scientists need to develop technological methods of converting these agro wastes to useful resources especially in developing countries. Fruit wastes are generated in large quantities globally from processing plants. Defective tomatoes rejected and damaged banana fruits as well as unusable pineapple fruits and peels constitute part of the agro waste biomass generated annually. Effective management of this biomass is still ongoing. This research focuses on the conversion of these agro wastes to bioelectricity (green energy) using single microbial fuel cells (SMFCs) technology. Fruits wastes of 5kg, 10kg, 15kg and 20k were used. Results showed that the higher the quantity of substrate, the higher the electricity produced. The maximum voltage outputs generated on day 1 were 4.2V, 3.1V and 3.0V from tomatoes, banana and pineapple (fruit and peel) wastes respectively. The values obtained for current readings were significantly proportional to the voltage readings. The physiochemical parameters; pH, Conductivity, BOD, COD and DO were consistent with those from similar studies. The conversion of tomatoes, banana and pineapple fruit waste to bioelectricity was achieved. Reduction of this biomass by biodegradation using the SMFC technology is one way of removing these agro wastes from the ecosystem to maintain a clean, healthy, pollution-free environment.

Key findings

  • Higher substrate quantities produce higher electricity outputs.
  • Maximum voltage outputs generated on day 1 were 4.2V, 3.1V, and 3.0V from tomatoes, banana, and pineapple wastes respectively.
  • Current readings were significantly proportional to voltage readings.

Keywords

Microbial fuel cellBiomass (ecology)ElectricityWaste managementBanana peelBiodegradation

Identifiers

DOI
10.23880/oajwx-16000141
Journal
Open Access Journal of Waste Management & Xenobiotics
Year
2019