Integrating eco-technological approach for textile dye effluent treatment and carbon dioxide capturing from unicellular microalga Chlorella vulgaris RDS03: a synergistic method

A pilot-scale treatment method was used in the present study to test the biosorption of textile dye from textile effluent and carbon dioxide using Chlorella vulgaris RDS03. The textile dye effluent treatment achieved that textile dye biosorption capacity (q(max)) rate of 98.84% on 15 days of treatment using Chlorella vulgaris RDS03. The Langmuir and Freundlich isotherm kinetics model indicated that the higher R-2 value 0.98. The microalga Chlorella vulgaris RDS03 was captured-96.86% of CO2 analyzed by CO2 utilization and biofixation kinetics, 4.65 mgmL(-1) of biomass, 189.26 mgg(-1) of carbohydrate, 233.89 mgg(-1) of lipid, 4.3 mLg(-1) of bioethanol and 4.9 mLg(-1) of biodiesel produced. We performed fatty acid methyl ester (FAME) profiling using gas chromatography-mass spectrometry (GCMS). We found 40 types of biodiesel compounds, specifically myristic acid, pentadecanoic acid, octadecanoic acid, palmitic acid, and oleic acid. The high-performance liquid chromatography (HPLC) validated and analyzed the produced bioethanol. Novelty of the Research center dot Unicellular microalga Chlorella vulgaris RDS03 was isolated from the freshwater region and investigated their biosorption efficiency against hazardous synthetic azo textile dyes. center dot Chlorella vulgaris RDS03 ability to biosorption 96.86% of environmental polluted carbon dioxide center dot Treated biomass was used to produce ecofriendly, unpolluted and green energy such as biofuels (biodiesel and bioethanol)

Automated summary

In this study, a pilot-scale treatment method was used to test the biosorption of textile dye and carbon dioxide using Chlorella vulgaris RDS03. The results showed that Chlorella vulgaris RDS03 achieved a high biosorption capacity for textile dye and effectively utilized carbon dioxide to produce biomass, bioethanol, and biodiesel.