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Rejected Watermelons: The Newest Renewable Energy Source

Date:
August 27, 2009
Source:
BioMed Central Limited
Summary:
Watermelon juice can be a valuable source of biofuel. Researchers have shown that the juice of reject watermelons can be efficiently fermented into ethanol.

Watermelon juice can be a valuable source of biofuel. Researchers have shown that the juice of reject watermelons can be efficiently fermented into ethanol.
Credit: iStockphoto/Klaudia Steiner

Watermelon juice can be a valuable source of biofuel. Researchers have shown that the juice of reject watermelons can be efficiently fermented into ethanol.

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Wayne Fish worked with a team of researchers at the USDA-Agricultural Research Service’s South Central Agricultural Research Laboratory in Lane, Oklahoma, US, to evaluate the biofuel potential of juice from ‘cull’ watermelons – those not sold due to cosmetic imperfections, and currently ploughed back into the field. He said, “About 20% of each annual watermelon crop is left in the field because of surface blemishes or because they are misshapen. We’ve shown that the juice of these melons is a source of readily fermentable sugars, representing a heretofore untapped feedstock for ethanol biofuel production”.

As well as using the juice for ethanol production, either directly or as a diluent for other biofuel crops, Fish suggests that it can be a source of lycopene and L-citrulline, two ‘nutraeuticals’ for which enough demand currently exists to make extraction economically worthwhile. After these compounds have been removed from the ‘cull’ juice, it can still be fermented into ethanol.

The researchers conclude, “At a production ratio of ~0.4 g ethanol/g sugar, as measured in this study, approximately 220 L/ha of ethanol would be produced from cull watermelons”.


Story Source:

The above story is based on materials provided by BioMed Central Limited. Note: Materials may be edited for content and length.


Journal Reference:

  1. Wayne W Fish, Benny D Bruton and Vincent M Russo. Watermelon juice: a promising feedstock supplement, diluent, and nitrogen supplement for ethanol biofuel production. Biotechnology for Biofuels, (in press) [link]

Cite This Page:

BioMed Central Limited. "Rejected Watermelons: The Newest Renewable Energy Source." ScienceDaily. ScienceDaily, 27 August 2009. <www.sciencedaily.com/releases/2009/08/090826073546.htm>.
BioMed Central Limited. (2009, August 27). Rejected Watermelons: The Newest Renewable Energy Source. ScienceDaily. Retrieved January 28, 2015 from www.sciencedaily.com/releases/2009/08/090826073546.htm
BioMed Central Limited. "Rejected Watermelons: The Newest Renewable Energy Source." ScienceDaily. www.sciencedaily.com/releases/2009/08/090826073546.htm (accessed January 28, 2015).

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