Using microalga Coelastrella sp. to remove some nutrients from wastewater invitro

Microalgae have been increasingly used for wastewater treatment due to their capacity assimilate nutrients. Samples of were taken from the Erbil channel near Dhahibha village in northern Iraq. The microalga Coelastrella sp. was three doses (0.2, 1, and 2g. l-1) this experiment 21 days, samples periodically (every 3 days) analyzed physicochemical parameters such as pH, EC, Phosphate, Nitrate, BOD5, addition to, Chlorophyll a concentration. Results showed that highest dose 2g.l-1 most effective removing nutrients, confirmed by significant differences (p≤0.05) between all doses. removal percentage recorded ammonium pass 96% followed NO3 with 95%, while BOD5 ranged 88.7 93.5%. Decreases nutrients coincided an increase chlorophyll-a content biomass on 17th day reaching 1.43 mg. l-1.