MESSAI.iO

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International MFC research in smart-systems with focus on iot-smart-systems. This demo showcases the power delivery potential of soil-based microbial fuel cells. We build a prototype energy harvest...

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What they did

System
MFC

What worked

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Abstract

This demo showcases the power delivery potential of soil-based microbial fuel cells. We build a prototype energy harvesting setup for a soil microbial fuel cell, measure the amount of power that we can harvest, and use that energy to drive an e-ink display. Microbial fuel cells are highly sensitive to environmental conditions, especially soil moisture. In near-optimal, super moist conditions our cell provides approximately 100 μW of power at around 500 mV, which is ample power over time to power our system several times a day. In sum, we find that the confluence of ever lower-power electronics and new understanding of microbial fuel cell design means that "soil-powered sensors" are now feasible. There remains, however, significant future work to make these systems reliable and maximally performant. This demo is a working copy of the system presented at LP-IoT'21 [6].

Keywords

Microbial fuel cellEnergy harvestingWork (physics)Power (physics)Fuel cellsWater content

Identifiers

DOI
10.1145/3485730.3493363
Journal
Proceedings of the 19th ACM Conference on Embedded Networked Sensor Systems
Year
2021