Newly isolated Acutodesmus obliquusassisted phycoremediation and sequestration of CETP wastewater: an integrated management of remediation

Isolated axenic culture of Acutodesmus obliquuswas identified using 28S DNA-based molecular method from the Vastral lake of Gujarat, India. In present study, newly isolated species A.obliquusused for the treatment of CETP-WW and CO2sequestration. Direct relation was observed in between pollution load and nutrient load of CETP wastewater with biochemical profile of A. obliquuswas obliquus. The COD/BOD ratio (1.9) was found to be significant on the scale of degradability by algal biomass. Reduction in BOD and COD was obtained maximum in order with 25 > 50 > 75 > 100% of CETP wastewater etc.; 82.3%, 71.9%, 52.2%, and 48.4% for BOD; and 75.4%, 68.5%, 53.9%, and 46.5% for COD. Findings showed that CETP-WW wastewater is rich in nutrients, which can be utilized for algal biomass production. A. obliquuswas subjected to four different concentrations (5%, 10%, 15%, and 20%) of carbon (gaseous form) in 50% concentration of CETP-WW. Maximum biomass productivity was obtained (2.09 ± 0.08 gL−1) with 10% CO2supply. The correlation was observed in all the concentrations 25%, 50%, 75%, and 100% of CETP-WW of BOD, COD, NO3−, and PO4−3between the protein, carbohydrate, and lipid. It indicated that microalgae have the potential to simultaneously realize CETP-WW wastewater purification and CO2fixation with value-added ingredients co-production.