Upgrading of microalgal consortia with CO from fermentation of wheat straw for the phycoremediation of domestic wastewater.

Algae have been considered as a best feedstock for combating CO. In the present study, two mixed microalgal cultures i.e. MAC1 and MAC2 were evaluated in batch mode with an extraneous supply of CO from the fermentation of wheat straw. Both the mixed cultures displayed promising CO sequestration potentials of 287 and 263 mg Ld, respectively. The removal efficiencies in terms of ammonium, phosphate, chemical oxygen demand, and nitrate were found to be 87%, 78%, 68% and 65%, respectively. Enriching the tolerance of the microalgal consortia to CO supply and wastewater as the nutrient source significantly enhanced the lipid production for both the microalgae consortia. Lipid contents of MAC1 and MAC2 were observed to be 12.29 & 11.37%, respectively while the biomass yield from both the consortia was 0.36 g L. Total chlorophyll and protein contents of MAC1 and MAC2 were 14.27 & 12.28 µgmL and 0.13 & 0.15 mgmL, respectively. Both the consortia found to have significant potential for CO sequestration, wastewater remediation and biofuel production.