Tiron, OlgaOlgaTironBumbac, CostelCostelBumbacPatroescu, Viorel IonViorel IonPatroescuBadescu, ValeriuValeriuBadescu2017-04-192017-04-192015-05-29Patent no. RO130247­-A0http://hdl.handle.net/123456789/842Patent Assignee Name(s) and Code(s): ECOIND INST NAT CERC­ DEZVOLTARE ECOLOGIE Patent application No. RO130247-A0Preparing mixed microalgae ­bacteria granules for purifying waste water comprises growing the microalgae­active sludge inoculum in a bioreactor, according to the following sequence: supply of bioreactor inoculated with a substrate­ containing liquid medium, periodically exposing the bioreactor to a light source, mechanically stirring the medium during substrate consumption, stopping the mechanical stirring, settling of the microalgae­ active sludge system and discharge of the active medium to obtain mixed microalgae­ active sludge granules having sizes of 200­300 and a settling rate of at least 10 m/h while ensuring, by settling, the microalgae recovery from the liquid medium at an efficiency of at least 99%.enMicroalgae–bacteria systemBioreactorWastewaterTreatmenttechnical documentation