Digestion for Food Industries
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Transcript of Digestion for Food Industries
Anaerobic Digestion and Biogas Use in the Great Lakes
Region Food Industries Wisconsin Bioenergy Summit
October 6, 2011
Joe Kramer
Energy Center of Wisconsin Madison, Wisconsin
Great Lakes Region Food Industry Biogas Casebook
Project Funders Agricultural Utilization Research Institute WI Focus
on Energy
Midwest Clean Energy
Application Center
General Mills
WI Milk Marketing
Board
Center for Innovative
Food Technology
NY State Energy
Research & Development
Authority
Food Production Types Covered
• Beer and beverages (2) • Cheese (3)
• Meat (beef and pork) (2) • Vegetables (1)
• Corn based snacks (1) • Oats (1)
• Refrigerated dough products (1) • Sugar (1)
Why Choose Anaerobic Digestion?
1. Cost-effective treatment
2. Produces renewable fuel
3. Can reduce odor from storage facilities
Reduced biosolids
Reduced energy needed
Anaerobic Digester Types Profiled
Covered lagoon (1)
Mixed heated covered lagoon (1)
Complete mix (2)
Anaerobic contact process (3)
Up-flow anaerobic sludge blanket (UASB) (4)
Mobilized film technology (1)
Less complex More complex
Digester Types
Covered lagoon
Mixed, heated covered lagoon
Graphic: Courtesy of US EPA AgSTAR Program.
City of Monmouth, IL, Pork Processing
■ Unheated covered lagoon (2000), HRT 7 days
■ Receives heated wastewater from hog production
■ Installed to reduce odors, provide pre-treatment
■ Exploring biogas use options
PHOTO: Courtesy of Cliff Haefke, US DOE Midwest Clean Energy Application Center.
Saputo Cheese USA
Waupun, WI
Mixed, heated, covered lagoon, (1991, 2009) HRT 5-6 days
>100k cfd biogas, scrubbed, fuels boiler for digester heat
Primary onsite treatment – after full treatment liquid is dischargeable
Photo courtesy of Saputo USA Inc.
Digester Types (continued)
Complete Mix (Continuous Mix)
Photo courtesy of Seneca Foods.
Seneca Foods, Vegetable Processing
Montgomery, MN
Continuous mix, mesophilic, tank (2007), SF built, HRT 25-30 days
Pre-treatment of vegetable processing waste
Seneca Foods (continued) Scrubbed, compressed, blended with NG
Biogas displaces NG purchases
Fuels process boiler and dryers in season
Fuels boiler in off season, hot water sent to 31 radiant heaters
Photos courtesy of Seneca Foods.
Digester Types (continued)
Anaerobic contact process (ACP)
JBS Green Bay, Beef Production
Green Bay, Wisconsin
Anaerobic contact process (1987), pre-treatment prior to city WWTP
HRT ~2 days
AD gives JBS control over WW treatment costs
Picture: Courtesy of JBS Green Bay.
JBS Green Bay (continued)
Biogas fuels 24.56MMBTU Cleaver Brooks boiler
Use of biogas offsets $600,000 per year in operating costs
Won 2005 WI Governor’s Award for Excellence in Environmental Performance
Picture: Courtesy of JBS Green Bay.
Graphic: Courtesy of Doug Hamilton, Oklahoma State University
■ Up-flow anaerobic sludge blanket (UASB)
Digester Types (continued)
Influent
City of Beaver Dam, WWTP Cheese Production
Beaver Dam, Wisconsin
Siemens Paques design, UASB (2011), ATI install, HRT 6 days
Will pre-treat waste from Kraft cream cheese production before city WWTP
City owns, Kraft will help finance w/fees
Picture: Courtesy of Dennis Totzke, Applied Technologies Inc.
City of Beaver Dam WWTP (continued)
Electricity sold to Alliant Energy
Heat used for influent WW and digester
Cost savings for all over alternatives
Nearly cost-neutral for residents
Photo: Courtesy of Wayne Karlovich, Applied Technologies, Inc.
City Brewery / Gundersen Lutheran
■ La Crosse, Wisconsin
■ Installed two Biothane UASB digesters (1982) for pre-treatment, HRT 4.4 hours
■ Gundersen Lutheran proposed to install generation (633kW)
■ GL sells electricity to Xcel Energy
■ CB uses heat on site
Photo: Courtesy of Gundersen Lutheran.
AD Benefits Revisited
Reduced treatment costs
• Improved profitability • Aid job retention • Create new jobs • Boost local economies
Companies “green” images
• Users of clean, renewable domestic energy • Good neighbors
Photo: Courtesy of Dennis Totzke, Applied Technologies, Inc.
Contact
Joe Kramer Energy Center of Wisconsin 455 Science Drive, Suite 200 Madison, Wisconsin 53711 608-238-8276x119 [email protected]
www.ecw.org/biogascasebook