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Water Conservation & Treatment Strategies for Ethanol Plants Governors Ethanol Coalition

Water Conservation & Treatment Strategies for Ethanol Plants Governors Ethanol Coalition EPA Joint Meeting Kansas City, MO Feb 10, 2006 Bibb Swain, President Delta-T Corp. Topics. External Process Water Balance Utility Water Requirements How It All Fits Opportunities.

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Water Conservation & Treatment Strategies for Ethanol Plants Governors Ethanol Coalition

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  1. Water Conservation & Treatment Strategies for Ethanol Plants Governors Ethanol Coalition EPA Joint Meeting Kansas City, MO Feb 10, 2006 Bibb Swain, President Delta-T Corp.

  2. Topics • External Process Water Balance • Utility Water Requirements • How It All Fits • Opportunities

  3. ACE ETHANOLStanley, WI

  4. External Process Water Balance 5,952 Gal/ Hr Ethanol Ethanol Plant 18.5 Gal/ Hr 2,233 Bu/ Hr Corn 2,248 Gal/ Hr 20.92 Tons/ Hr DDGS 502 Gal/ Hr Water Out = 520 GPH Water In = 2,248 GPH Basis: 50 mmgpy Typical Corn-Based Dry Mill ethanol Plant

  5. Cooling Tower Water Balance 8,820 Gal/ Hr Evaporation 600 Gal/ Hr Cooling Tower Drift Makeup Water 14,700 Gal/ Hr 5,280 Gal/ Hr Blowdown Basis: 50 mmgpy Typical Corn-Based Dry Mill ethanol Plant

  6. Boiler Water Balance 13,860 Gal/ Hr Steam 10,000 – 13,600 Gal/ Hr Condensate Makeup Water 138 Gal/ Hr 260 – 4,100 Gal/ Hr Deaerator Boiler 120 + Gal/ Hr Blowdown Basis: 50 mmgpy Typical Corn-Based Dry Mill ethanol Plant

  7. DDG Dryer/ TO Water Balance 70,049 #/ Hr Water Vapor 8,398 Gal/ Hr DDG Dryer/ Therm. Oxid. Wet Cake w/ Syrup 111,892 #/ Hr 8,900 Gal/ Hr 20.92 Tons/ Hr DDGS 502 Gal/ Hr Basis: 50 mmgpy Typical Corn-Based Dry Mill ethanol Plant

  8. Boiler Overall Water Balance Evaporation & Drift = 9,420 gph 14,700 gph Cooling Tower Deaerator & Leaks = 140 gph 300 gph Blowdown = 5,280 gph Blowdown = 120 gph 13,860 gph 13,860 gph Water Vapor = 8,398 gph Fresh Makeup Water Ethanol Plant 6,631 gph Dryer System DDGS = 502 gph 2,248 gph Ethanol =19 gph H2O Gal Water/ Gal Ethanol = 3.63 Corn Water Out = 23,860 gph Water In = 23,860 gph Basis: 50 mmgpy Typical Corn-Based Dry Mill ethanol Plant

  9. Water Conservation Opportunities Reduce Energy Consumption (less cooling tower evaporation & blowdown) Recycle waste and blowdown streams Treat makeup water (less blowdown) Use air or groundwater to reject heat (less evaporation and blowdown)

  10. Water Conservation Opportunities Gallons Fresh Water/ Gallon Ethanol less than: <3 – Current Best Practice 1.5 – Achievable with proven technology at extra capital cost 0 – Possible in future with new technologies

  11. Water Vapor from DDGS Dryer

  12. Evaporator, Distillation System and Cooling Tower of Modern Ethanol Plant

  13. Our unique FlexiFerm™ system lets you switch between the greater quality control of batch or the greater production efficiency of continuous fermentation.

  14. Research & Development Mobile Membrane Test Lab

  15. Clean Water - Clean Environment The Ethanol Industry is Doing Its Part

  16. Thank You!

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