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Water Conservation & Treatment Strategies for Ethanol Plants Governors Ethanol Coalition

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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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Presentation Transcript
slide1

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
Topics
  • External Process Water Balance
  • Utility Water Requirements
  • How It All Fits
  • Opportunities
external process water balance
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

cooling tower water balance
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

boiler water balance
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

ddg dryer to water balance
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

overall water balance

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

water conservation opportunities
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)

water conservation opportunities1
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

slide13

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

slide14

Research & Development

Mobile Membrane Test Lab

slide15

Clean Water - Clean Environment

The Ethanol Industry is Doing Its Part

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