Growing duckweed to recover nutrient from wastewater is accompanied by modification of polyphenols content.

Our society is generating an increasing quantity of urban organic wastes, and the opportunity of shifting the view of waste streams from pollutant to renewable resource exists. Waste treatments create a chance to generate fuels, chemicals and bio-products, while simultaneously recycling nutrients and water. L. punctata showed 15 substances in control and 3 more new substances after 60 days of growing on wastewater. In L. minor 10 substances were detected and 5 new substances on wastewater. L. gibba had 15 components plus 3 more on wastewater. S. polyrhiza showed the more complex chromatograms with 16 substances in control and 21 in fronds growing on wastewater.