Pilot scale wastewater treatment, CO2 sequestration and lipid production using microalga, Neochloris aquatica RDS02. Issue 14 (5th December 2020)

• Record Type: Journal Article
• Authors: Tamil Selvan, Silambarasan; Velramar, Balasubramanian; Ramamurthy, Dhandapani; Balasundaram, Sendilkumar; Sivamani, Kanimozhi
• Is Part Of: International journal of phytoremediation. Volume 22:Issue 14(2020)
• Page Start: 1462
• Page End: 1479
• Publication Date: 2020-12-05
• Subjects: CO2 sequestration -- biodiesel -- bioethanol -- biosorption kinetics -- heavy metals -- Nile red -- Pilot scale -- tannery effluent; Phytoremediation -- Periodicals; 628.5
• DOI: 10.1080/15226514.2020.1782828
• Languages: English
• ISSNs: 1522-6514

Abstract

Abstract: In present investigation carried out large-scale treatment of tannery effluent by the cultivation of microalgae, Neochloris aquatica RDS02. The tannery effluent treatment revealed that significant reduction heavy metals were chromium-3.59, lead-2.85, nickel-1.9, cadmium-10.68, zinc-4.49, copper-0.95 and cobalt-1.86 mg/L on 15th day of treatment using N. aquatica RDS02. The microalgal biosorption capacity q max rate was Cr-88.66, Pb-75.87, Ni-87.61, Cd-60.44, Co-52.86, Zn-84.90 and Cu-54.39, and isotherm model emphasized that the higher R 2 value 0.99 by Langmuir and Freundlich kinetics model. The microalga utilized highest CO2 (90%) analyzed by CO2 biofixation and utilization kinetics, biomass (3.9 mg/mL), lipid (210 mg mL −1 ), carbohydrate (102.75 mg mL −1 ), biodiesel (4.9 mL g −1 ) and bioethanol (4.1 mL g −1 ). The microalgal-lipid content was analyzed through Nile red staining. Gas chromatography mass spectrometric (GCMS) analysis confirmed that the presence of a biodiesel and major fatty acid methyl ester (FAME) profiling viz ., tridecanoic acid methyl ester, pentadecanoic acid methyl ester, octadecanoic acid methyl ester, myristic acid methyl ester, palmitic acid methyl ester and oleic acid methyl ester. Fourier transform infrared (FTIR) analysis confirmed that the presence of a functional groups viz ., phenols, alcohols, alkynes, carboxylic acids, ketones, carbonyl and ester groups. The bioethanol production was confirmed by high-performance liquid chromatography (HPLC) analyze. Graphical Abstract: