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Antibiotics pose concern for ethanol producers
There are a lot of reasons why corn-based ethanol may not be best biofuel available to ween ourselves off of petroleum, most of which have been well covered on this site. Today, we came across one that we were previously unaware of, and, interestingly enough, it has to do with bacteria and antibiotics.
Ethanol is created by the fermentation of sugars present in a given feedstock, usually corn here in the United States. Yeast must be kept healthy enough to munch on these sugars if a good batch of alcohol is going to be produced, and ethanol producers are apparently using antibiotics like penicillin and virginiamycin to ward off yeast-killing bacteria.
Not only can the use of these antibiotics promote the growth of new strains of bacteria, it may also have undesirable effects to the leftover distillers grain, which is generally sold off as livestock feed. Leftover antibiotics in this distillers grain is a potential safety hazard for the livestock, with some studies linking the use of distillers grain to elevated rates of E. coli in cattle. There’s always something, isn’t there?
[Source: Agweek]
Filed under: Ethanol, Green Daily
Antibiotics pose concern for ethanol producers originally appeared on AutoblogGreen on Fri, 10 Apr 2009 11:54:00 EST. Please see our terms for use of feeds.
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