Location

Old Dominion University, Learning Commons at Perry Library, West Foyer

Start Date

8-4-2017 8:30 AM

End Date

8-4-2017 10:00 AM

Description

As interest in algal biofuel grows, the need to explore diverse nutrient sources for growing algae becomes apparent. Struvite and Hydroxyapatite (HAP) were precipitated after flash hydrolysis. The leftover aqueous phase (AP) could serve as nutrients source for algae cultivation and the potential reuse of this waste stream is promising. To test this, 12 bottles of Scenedemus sp., four of Struvite, four of HAP, and four control AM-14 synthetic media were cultivated. 10% of the Phosphorus in the synthetic media was replaced with phosphorous from the struvite AP, and 10% of the nitrogen in the synthetic media was replaced with HAP AP. The bottles with struvite AP replacement experienced higher algae growth compared to the control and HAP AP which experienced very slow growth. Based on the results, struvite AP appears to be a viable nutrient replacement for algae cultivation while HAP AP toxicity should be further investigated.

Comments

Research Advisor: Dr. Sandeep Kumar

Keywords: Bio-fuels, Nutrient recycle, Algae, Hydroxyapatite, Struvite

Presentation Type

Poster

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Apr 8th, 8:30 AM Apr 8th, 10:00 AM

Testing Effectiveness of Aqueous Phases from Struvite and Hydroxyapatite Mineral Precipitation as Algal Nutrient Sources

Old Dominion University, Learning Commons at Perry Library, West Foyer

As interest in algal biofuel grows, the need to explore diverse nutrient sources for growing algae becomes apparent. Struvite and Hydroxyapatite (HAP) were precipitated after flash hydrolysis. The leftover aqueous phase (AP) could serve as nutrients source for algae cultivation and the potential reuse of this waste stream is promising. To test this, 12 bottles of Scenedemus sp., four of Struvite, four of HAP, and four control AM-14 synthetic media were cultivated. 10% of the Phosphorus in the synthetic media was replaced with phosphorous from the struvite AP, and 10% of the nitrogen in the synthetic media was replaced with HAP AP. The bottles with struvite AP replacement experienced higher algae growth compared to the control and HAP AP which experienced very slow growth. Based on the results, struvite AP appears to be a viable nutrient replacement for algae cultivation while HAP AP toxicity should be further investigated.