Effect of substrate load and nutrients concentration on the polyhydroxyalkanoates (PHA) production using mixed consortia through wastewater treatment

► PHA production efficiency increased by 14% after optimizing the nutrient conditions. ► PHA was composed of the co-polymer PHB-co-PHV. ► 16S rRNA sequencing showed the dominance of Firmicutes and Proteobacteria. ► PHA production through waste water treatment significantly reduces the production cost.