Regolithic_Tiger t1_jao5yzv wrote
Reply to comment by [deleted] in German scientists show a commercially feasible method for cyanobacteria to extract 17 rare earth elements from low-concentration sources. Currently, most of the world's supply of these elements is mined in China. by lughnasadh
That's contact water, dude. It's not supposed to be clean. they have those ponds to manage their water so it doesn't get released to the environment. They then take the water from the ponds (and TSFs) and run it through the treatment plant or some other form of treatment and then discharge it once it meets water quality guidelines.
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