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Algae Cultivation from Heterotrophic Growth with Hydrothermal Aqueous Product of Dairy Manure
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Algae has grown in popularity as a human and livestock food supplement due to its high protein content and because it can be grown year-round on non-arable land. However, current drawbacks to algae production include the high operating costs associated with growth media and fluorescent lighting for autotrophic growth. The hydrothermal aqueous product (HAP) of the hydrothermal carbonization (HTC) process of dairy manure is nutrient rich and contains carbons that would allow for the heterotrophic growth of algae. A sustainable model can be created by using dairy manure to create algal livestock feed. Comparing the biomass productivity of using different concentrations of HAP in freshwater and varying the autotrophic, heterotrophic, and mixotrophic conditions will determine optimal growth conditions using HAP as a nutrient and carbon source.