Anaerobic Digestion Technology (ADT)

Indiana Poultry Manure Survey

Poultry manure is feedstock for anaerobic digesters. A survey was conducted to study the availability, application, and economic values of poultry manure for cropland in Indiana.

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Related Projects

Effect of anaerobic digestion on volatile fatty acid concentrations, and odor and gas emissions

- USDA Conservation Innovation Grants (CIG) project

- Collaboration with Washington State University

 

Findings on the effect of anaerobic digestion on volatile fatty acid concentrations:

 

- Five volatile fatty acids (VFA) in dairy manure from four sources were studied.

- The VFA concentrations were determined from weekly samples using HPLC.

- Concentrations of VFA in all sources showed large temporal and spatial variations.

- Anaerobic digestion significantly reduced VFA in dairy manure.

 

Nutrient Characterization of Digester Effluents

 

- U.S. EPA and USDA ARS project

- Collaboration with USDA ARS National Soil Erosion Research Laboratory

- Two research components:

 

- Anaerobic digester sample collection and analysis

Study the effects of different anaerobic digester design, feedstock, and seasonal variation on nutrient availability.

 

- Lab and field leachate/runoff study

Investigate the leachate/runoff after application of raw feedstock and digestate to soil and cropland.

Digester sampling

Sample pre-treatment

Soil sample treatment and analysis

Leachate and runoff test