Dr. Rahbar Rahimi has born in Zahedan,Iran in1952. He has his MSc degree in process analysis and development from Aston University and PhD degree in heat transfer from Bath University in UK. He has been a member of academic staff of university of Sistan and Baluchestan since 1979 and has been on the editorial board of Iranian Journal of Chemical Engineering published by Iranian Association of Chemical Engineers and Journal of Chemical and Petroleum Engineering of Tehran University. His major research interest is in the field of distillation tray design, modeling and simulation using CFD.
Increase of energy requirements has led to the increase of flue gas emission to the atmosphere. The CO2 content of emitted flue gases has increased greenhouse effect and warming up of earth atmosphere. The heat pollution should be stopped for the sustainability of environment. To that end, Chlorella vulgaris was used in an airlift column photo bioreactor to reduce carbon dioxide. The gas sparged through a spager ring that placed in between the riser and down comer. The liquid circulation direction is from riser to the down- comer causing an external liquid circulation.\r\n\r\nThe results showed that with increasing of input gas velocity, the amount of gas holdup and liquid superficial velocity in the riser increased. In the light intensity of 1400 lux, and gas superficial velocity of 0.00157 m/s during 10 days’ culture of concentration of carbon dioxide decreased from 2% at gas inlet to less than 0.72% at the gas out let, respectively. This is recommended as a feasible equipment for CO2 sequestration even in domestic use.\r\n