Use of Biodiesel Waste Streams in Poultry Composting

CSBE 2012
Use of Biodiesel Co-Products
in Poultry Composting
Applications
Dr. Rob Nicol
University of Guelph –
Ridgetown Campus
CARES
Biodiesel Production
Oil Feedstocks
Biodiesel Co-Products Impurities
Wastewater:
Crude Glycerol:
• COD up to 475 000 mg L-1
• 26 % methanol
• pH ~ 1.0
• 27 % free fatty acids
• 2.8 % potassium
• pH ~ 9.5
Initial Characteristics
Composting Biodiesel Co-Products
Compost Temperature
70
Ambient temperature
CG-BWW
CG-MW
Temperature °C
60
50
40
30
20
10
0
0
20
40
60
Composting time (days)
80
Characteristics of Compost
BWW Reduced Emissions
Adding biodiesel wastewater to poultry litter:
• reduced odours
• reduced ammonia emissions 22 % to 95 %
Summary
• biodiesel co-products were compostable
• biodiesel wastewater improved
atmospheric emissions during composting
of poultry litter
• work continues on effect of treatments on
microbial processes
Acknowledgements
OMAFRA New Directions
Agricultural Adaptation Council
Mac MacAlpine, Lucas McNea, Shirin Bahrami