Home > Press > Turning waste into power with bacteria — and loofahs
Loofahs, thanks to their large pores, have emerged as a potential new tool to advance sustainability efforts on two fronts at the same time: energy and waste. Credit: iStock/Thinkstock |
Abstract:
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. The study describes the pairing of loofahs with bacteria to create a power-generating microbial fuel cell (MFC) and appears in the ACS journal Environmental Science & Technology.
Shungui Zhou and colleagues note that MFCs, which harness the ability of some bacteria to convert waste into electric power, could help address both the world's growing waste problem and its need for clean power. 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.
The authors acknowledge funding from the National Natural Science Foundation of China.
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Contacts:
Shungui Zhou, Ph.D.
Guangdong Institute of Eco-environmental and Soil Sciences
Guangzhou 510650
China
Phone: +86-20-3730-0951
Fax: +86-20-8702-5872
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Michael Bernstein
202-872-6042
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301-775-8455
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