Anaerobic Digestion in the U.S.
Livestock Industry:
 Environment, Technology, and Deployment Opportunities

Introduction: Farm Processes

Introduction: Environmental Concerns

Waste Systems Effect
Environmental Performance

Odor Relationship

Greenhouse Gas Emissions

What are Anaerobic Digesters?

What Makes Digesters work?

Project Types

Typical Digester Configuration

Why Anaerobic Digesters?

Anaerobic Digester Types

Unheated Digesters

Heated (Mesophilic) Digesters

Gas Use: Flares

Gas Use: Heat

Gas Use: Electric

Comparative: Fecal Coli

Comparative: Pathogens

Environmental Performance

Example: Environmental Retrofit

Digesters are Cost Effective
when Environment Considered

Caution - Digesters Can Fail!

Main Reasons for Failures

Digester Distribution - 1990’s

Current U.S. Digester Status

Today’s Trends:  Policy

Future Digester Outlook

And that’s all for now...

Slide 30

Digester Status - 1990’s

General Costs: Livestock Basis

First Generation:  1970-1990

The U.S. Digestion Experience

Remember…...