Microalgae cultivation as tertiary unit operation for treatment of pharmaceutical wastewater associated with lipid production. (September 2016)

• Record Type: Journal Article
• Authors: Hemalatha, Manupati; Venkata Mohan, S.
• Is Part Of: Bioresource technology. Volume 215(2016)
• Page Start: 117
• Page End: 122
• Publication Date: 2016-09
• Subjects: Wastewater Treatment -- TAG -- Nutrients -- Fatty acid methyl esters (FAME) -- Unsaturated fatty acids; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2016.04.101
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Microalgae as a tertiary process to treat industrial wastewater. Microalgae based process resulted treated wastewater and biomass production. Higher lipid productivity with diversified FAME profile was observed in the stress phase. Microalgae offer multiple benefits to the energy sector and environment. Abstract: Microalgae based treatment was studied to polish sequential batch reactor (SBR) treated pharmaceutical wastewater under mixotrophic mode of operation with simultaneous biomass/lipid production. At the end of biomass growth phase (BGP), carbon removal efficiency was observed to be 73% along with good removal of nitrates (62%). Since microalgae assimilate nutrients from wastewater for growth, an increment in total biomass productivity (2.8 g/l) was observed. Subjecting to nutrient stress phase (NSP), total lipid content of 17.2% with neutral lipids of 6.2% was observed under light condition. Contrarily, dark condition depicted total lipid content of 15.8% with neutral lipids constituting 6.5%. The nutrient stress in combination with light showed marked influence on the profile of saturated and unsaturated fatty acids. Integration of microalgae cultivation improves environmental sustainability and enables greener routes of biofuels and value added products synthesis in a biorefinery approach.