Abstract
An “in-lake” reactor system was developed to treat acidic mining lakes. The reactor uses the microbial processes of sulfate reduction and iron reduction followed by precipitation of iron sulfides to remove acidity, sulfur, and iron from the lake water. The basic reactor design is a straw-filled tube, which was vertically installed in the water column of an enclosure in the lake. Bottom water was pumped through the reactor, and ethanol was continuously fed as substrate for the microbial processes.
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