Small scale photo bioreactor treatment of tannery wastewater, heavy metal biosorption and CO2 sequestration using microalga Chlorella sp.: a biodegradation approach

Abstract Recently, mass production of lipid along with heavy metal reduction is gaining momentum due to their cost-effective and greener approach towards waste water treatment. The purpose this study investigate the small scale photo bioreactor treatment tannery effluent using Chlorella sp. isolated form Yercaud lake, Tamil Nadu, India. results showed a significant decrease in metals content after Maximum Chromium (Cr) 10.92 mg L ?1 was recorded, followed by Cobalt (Co)-7.37 , Nickel (Ni)-9.15 Cadmium (Cd)-8.48 Lead (Pb)-12.54 Zinc (Zn)-11.56 Copper (Cu)-10.71 at end 20th day microalgae, analyzed for biosorption ability maximum capacity (qmax) rate against 81.36, 70.53, 82.15, 63.29, 58.92, 83.43, 64.83 µg Cr, Pb, Ni, Cd, Co, Zn, Cu respectively. It matched Langmuir Freundlich kinetics models. CO 2 utilization found be 60.50% concentration lipid, carbohydrate protein 0.95 g 250 mL 160 presence various groups such as hydroxyl, alkyl, carbonyl carboxylic acids confirmed Fourier transform infrared analysis. Thus, microalgae good pollutants from water.