Long Term Field Testing of Floating Microbial Fuel Cells in Anoxic Wastewater of a Purification Plant
ECS Meeting Abstracts(2019)
摘要
In the present study, we report different prototypes of floating MFCs that have been tested in anoxic wastewater environments of an Italian wastewater treatment plant, over a period of 3 years. Several configurations of horizontal (flat) and vertical (tubular) MFCs were assembled and tested, using low-cost and light-weight materials, such as plastic lunch boxes, polystyrene or wood to keep the systems afloat and ceramics. Untreated carbon cloth/veil was used for both the anode and cathode electrodes, and felt (flat MFCs) or clay (tubular MFCs) was used as the cation-exchange separator. Flat MFCs generated up to 15 mW/m2 of power, depending on nutrient availability in the water, whereas the cylindrical MFCs generated up to 18 mW/m2. The long-term operation did not affect the electrodes of the tested MFC systems. The cathode was the limiting electrode, sensitive to light, for the flat MFCs smaller than 50x50cm. In addition, a new and simple low-energy remote monitoring system, based on LoRa technology, was used for data transmission over distances of > 500 m. This is a piece of hardware that can potentially be used remotely in the field to create a sensing/monitoring network, as it can be directly powered by the deployed MFCs. Figure 1
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