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Turning waste into power with bacteria and loofahs

Date:
December 4, 2013
Source:
American Chemical Society
Summary:
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. A new study describes the pairing of loofahs with bacteria to create a power-generating microbial fuel cell.
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Loofahs.
Credit: © posh / Fotolia

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.


Story Source:

The above post is reprinted from materials provided by American Chemical Society. Note: Materials may be edited for content and length.


Journal Reference:

  1. Yong Yuan, Shungui Zhou, Yi Liu, Jiahuan Tang. Nanostructured Macroporous Bioanode Based on Polyaniline-Modified Natural Loofah Sponge for High-Performance Microbial Fuel Cells. Environmental Science & Technology, 2013; 131122142115006 DOI: 10.1021/es404163g

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American Chemical Society. "Turning waste into power with bacteria and loofahs." ScienceDaily. ScienceDaily, 4 December 2013. <www.sciencedaily.com/releases/2013/12/131204112034.htm>.
American Chemical Society. (2013, December 4). Turning waste into power with bacteria and loofahs. ScienceDaily. Retrieved September 1, 2015 from www.sciencedaily.com/releases/2013/12/131204112034.htm
American Chemical Society. "Turning waste into power with bacteria and loofahs." ScienceDaily. www.sciencedaily.com/releases/2013/12/131204112034.htm (accessed September 1, 2015).

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