When we added sulfate to the aquifer, we saw virtually immediate stimulation of benzene removal. The bacteria oxidized benzene and produced carbon dioxide, which is not harmful to the environment.

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One of the major advantages of using an anaerobic technique is it lets you remove MTBE at the source, before it has a chance to spread.

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This process might not work in all petroleum-contaminated aquifers, but we have proved it works where there are sulfate-reducing microbes present in the environment.

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