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Evaluating eTuber and Energybeets as Feedstocks for Biofuels & Biogas in South Florida

Evaluating eTuber and Energybeets as Feedstocks for Biofuels & Biogas in South Florida. FDACS Office of Energy Farm to Fuel Project PIs: Brian Boman, IRREC Gilly Evans, TREC Ann Wilkie, Soil & Water Science. Coopeators & Partners. 12437 Magnolia Ave, Livingston, CA 95334. Objectives:

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Evaluating eTuber and Energybeets as Feedstocks for Biofuels & Biogas in South Florida

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  1. Evaluating eTuber and Energybeets as Feedstocksfor Biofuels & Biogas in South Florida • FDACS Office of Energy Farm to Fuel Project • PIs: Brian Boman, IRREC • Gilly Evans, TREC • Ann Wilkie, Soil & Water Science Coopeators & Partners 12437 Magnolia Ave, Livingston, CA 95334 • Objectives: • Field trials with eTuber™ - yield & growing protocol • Rotation crops (sugarbeet, sweet sorghum, others) • Development of protocols to process into ethanol & biodiesel • Complete economic analysis • Greenhouse gas analysis • Application data for Advanced Biofuel Feedstock (ABF) designation for eTuber 17-pound eTuberTM next a table Sweetpotato. NCERC at SIUE400 University Park Dr.Edwardsville, IL 62025618-659-6737 Energy Beet

  2. eTuber™ Production in Florida Advantages • Yields enough starch to produce 1,800 gal ethanol per ac • Much less water, fertilizer, and pesticides than other crops • Grows well in nutrient-poor, sandy soils • Heat tolerant & water efficient • Recovers well after drought and heat stress • Resistance to nematodes and insects • Doesn’t compete with food crops for prime land • High value protein after processing Challenges • Grown from transplanted plugs or slips • Viruses – rotate 1/3 of acres with virus-free material each year • Sweet Potato weevil – pesticide application

  3. Rotation Crops 2-year rotation with harvest 11 months/year • Energy Beets • Winter crop • 1000 gal ethanol per acre • 200+ lb N, 60-80 lb K2O & P2O5 • Sweet Sorghum • Summer crop • 110-135 days • 400 gal ethanol per acre • Ratoon crop if planted by early May • 100 lb N & K2O, 60 P2O5 (EAA data) Potential to avg. 2,200 gal ethanol per acre per year with 3-crop rotation

  4. Field trials: • Experiments on planting density, rotation crops, fertilizer and irrigation rates, pest & disease control, and planting and harvest times. • Processing: • Optimization of protocols for conversion into ethanol and by-products, • GHG analysis for eTuber from field and processing data, • test syrup as a putative feedstock for e-coli, algae, and yeast to make biodiesel, jet fuel, etc.

  5. Biogas: • develop a method of producing biogas using culled sweetpotatoes, vines, and stillage through anaerobic digestion. • Economics: • cost of growing crops, • economic analysis of conversion to ethanol and biofuels, • market potential analysis, • impact of commercialization on economic development in FL. Acknowledgement This research is sponsored by FDACS Office of Energy and the State of Florida

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