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Turning waste into power with bacteria - and loofahs
Loofahs, best known for their use in exfoliating skin to soft, radiant perfection, have emerged as a new potential tool to advance sustainability efforts on two fronts at the same time: energy and waste.
Current MFC devices can be expensive and complicated to make. In addition, the holes, or pores, in the cells¡¯ electrodes are often too small for bacteria to spread out in. Recently, researchers have turned to plant materials as a low-cost alternative, but pore size has still been an issue. Loofahs, which come from the fully ripened fruit of loofah plants, are commonly used as bathing sponges.
They have very large pores, yet are still inexpensive. That¡¯s why Zhou¡¯s team decided to investigate their potential use in MFCs.
When the scientists put nitrogen-enriched carbon nanoparticles on loofahs and loaded them with bacteria, the resulting MFC performed better than traditional MFCs. ¡°This study introduces a promising method for the fabrication of high-performance anodes from low-cost, sustainable natural materials,¡± the researchers state.