A Sustainable Approach for Carbon Dioxide Fixation

Carbon dioxide is a green house gas that exists in earth’s atmosphere. In recent decade’s due to increment of population and rapid industrialization, the amount of CO2 has increased significantly and has caused global warming and other problems. Different methods are used for reduction of CO2 concentration in air one method is storing CO2 gas below the ground, but this manner doesn’t provide a long time solution, so in depth researches was conducted in the past years to investigate different methods of CO2 treatment. A noble method is using microalgae to reduce CO2 either from the atmosphere or fuel gases from energy plants. CO2 is captured by microalgae through photosynthesis and is permanently stored in form of biomass. Microalgae can also be used for treating wastewater that contains some amounts of CO2 and other compounds. Combination of CO2 treatment, biofuel production and wastewater treatment may provide a very promising alternative to current CO2 treatment strategies. This paper attempts to review the present day technologies for CO2 removal with a special emphasis on employing microalgae.