Abstract: Extensive work has been carried out to find suitable strain of algae which are tolerant to high concentration of CO
2
. In the
previous studies Chlorella vulgaris(SAG 211.12), a mesophilic strain, showed CO2sequestration upto 23% CO2
concentration. The
main constraint using such strains is that they don’t tolerate temperatures beyond 35-40ºC. Hence attempts were undertaken to isolate
algal strains from hot springs located across the western ghats of Maharashtra. Limnothrix redekei, Planktolyngbya crassa and
Geitlerinema sulphureumcould easily sequester about 28% of CO2
without hampering biomass production. High temperature
adaptability (42ºC), high CO2
tolerance (23.08%), reasonably high biomass production and easy harvesting make G. sulphureum a
promising candidate for the CO2
sequestration in the tropical climatic conditions. Attempts are being made here to screen the isolated
strains for lipid production.