The study aimed to determine the possibility of using dairy sewage after the initial treatment anaerobic biomass production of microalgae species Platymonas subcordiformis. The process of growing and propagation of algae culture test was carried out in fotobioreaktorach piping vertical orientation. The study was divided into a series of depending on the amount of waste water introduced into the process system. During the breeding carried out the analysis of concentration of biomass mikroglnów in bioreactors and changes the contents of the main components of the growth medium. We identified the potential of biomass production Platymonas subcordiformis based on a culture medium prepared on the basis of wastewater anaerobically treated.