Presentation Title

Proximate Composition of Algae Biomass to Access Nutritional Value as a Feed Supplement

Faculty Mentor

Marcia A Murry PhD, Greg Barding

Start Date

18-11-2017 2:15 PM

End Date

18-11-2017 3:15 PM

Location

BSC-Ursa Minor 60

Session

Poster 3

Type of Presentation

Poster

Subject Area

biological_agricultural_sciences

Abstract

Proximate Composition of Algae Biomass to Access Nutritional Value as a Feed Supplement

The bioconversion of sunlight energy into biofuels and feed can be coupled to nutrient recovery from organic wastes using systems that employ microalgae grown symbiotically with heterotrophic microorganisms. Of interest for algae biofuel production is the high amounts of oil (lipid) produced by microalgae, primarily as triglycerides, while the high protein content and high levels of unsaturated lipids are desirable for feed supplements. A major cost factor for algal biomass production is the provision of water and nutrients. Thus, a resource and economic synergy are possible as algae-based bioremediation generates revenue from the treatment service and improves the economics of biofuel and feed production. Here we report on the proximate biochemical composition of algal biomass grown using primary manure effluents for nutrients in outdoor high rate algae ponds. For comparison, axenic seasonally dominant algal isolates were grown under simulated pond conditions in bioreactors. Concentrations of soluble metabolites and proteins and carbohydrates and the composition of the monomers were measured using NMR of digestates. Nucleic acids were measured using a fluorescent dye, propidium iodine. Lipid levels and composition were assessed following in situ transesterification and individual fatty acid methyl esters (FAMEs) were measured using GC-MS. The high proportion of unsaturated lipids, favorable protein levels and amino acid composition suggest algal biomass would be a favorable feed supplement and a possible feedstock for biodiesel.

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Nov 18th, 2:15 PM Nov 18th, 3:15 PM

Proximate Composition of Algae Biomass to Access Nutritional Value as a Feed Supplement

BSC-Ursa Minor 60

Proximate Composition of Algae Biomass to Access Nutritional Value as a Feed Supplement

The bioconversion of sunlight energy into biofuels and feed can be coupled to nutrient recovery from organic wastes using systems that employ microalgae grown symbiotically with heterotrophic microorganisms. Of interest for algae biofuel production is the high amounts of oil (lipid) produced by microalgae, primarily as triglycerides, while the high protein content and high levels of unsaturated lipids are desirable for feed supplements. A major cost factor for algal biomass production is the provision of water and nutrients. Thus, a resource and economic synergy are possible as algae-based bioremediation generates revenue from the treatment service and improves the economics of biofuel and feed production. Here we report on the proximate biochemical composition of algal biomass grown using primary manure effluents for nutrients in outdoor high rate algae ponds. For comparison, axenic seasonally dominant algal isolates were grown under simulated pond conditions in bioreactors. Concentrations of soluble metabolites and proteins and carbohydrates and the composition of the monomers were measured using NMR of digestates. Nucleic acids were measured using a fluorescent dye, propidium iodine. Lipid levels and composition were assessed following in situ transesterification and individual fatty acid methyl esters (FAMEs) were measured using GC-MS. The high proportion of unsaturated lipids, favorable protein levels and amino acid composition suggest algal biomass would be a favorable feed supplement and a possible feedstock for biodiesel.