Anaerobic Dry Digestion Trailer

Background

Wisconsin totals around 650,000 tons of food waste annually

Disposal of waste cost between $10-$50

Anaerobic digestion decrease disposal cost

Limitation is due to high cost of digestion technology

Objectives

Test Period: Test various waste steams for biogas

production and quality Determine the impact of storage

Post Testing: Develop a facility management plan

for handling annual waste Develop guidelines for other facilities

Project Processing Facility

Del Monte in Cambria, WI Canning between June and October Peas: 1 truckload/ day for 25 days Beans: 50 to 60 tons/day for 75 days Corn: 600 tons/day for 60 days

Testing 2012/2013

Summer 2012: Worked out issues with digesters

Summer/Fall 2013 Run 1: Green Beans (finished) Run 2: Fresh Corn (Started 9/20) Run 3: Corn stored 30 days Run 4: Corn stored 60 days

Digester Trailer

Digester Trailer

Run 1: Green BeansStart Up

Run 1: Green BeansTest Period

Run 1: Green BeansResults

25-Jul 4-Aug 14-Aug 24-Aug 3-Sep 13-Sep 23-Sep0

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Biogas Production

AD 1AD 3

Date

Pro

ducti

on (

L)

Methane ContentWeek 1 2 3 4AD 1 32.10% 48.79% 45.85% 38.36%AD 3 16.28% 73.65% 60.50% 37.82%

Run 1: Green BeansPost Run

Run 2,3,4: Corn Start Up