Screening of microalgae and LED grow light spectra for effective removal of dissolved nutrients from cold-water recirculating aquaculture system (RAS) wastewater

•Recirculating aquaculture wastewater has high concentration of usable nutrients.•Green microalgae grew as well in aquaculture wastewater as in algae medium at ∼17 °C.•Green microalgae had higher growth and nutrient removal than non-green microalgae.•Green microalgae removed most dissolved nutrients in 4 days in unfiltered wastewater.•All three tested continuous spectra LED grow lights supported high nutrient removal.