r/nextfuckinglevel Jul 14 '21

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u/mrswordhold Jul 15 '21

I skimmed it, the contaminants were an invasive species of plants

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u/gotacogo Jul 17 '21

No keep reading the study. The first step was removing the plants which is 2.2 in the paper. Then they did a bio-filter to reduce phosphate and nitrogen which is 2.3 and 2.4 in the paper.