The Use of a Biosolids Product as a Carbon Source for Biological Nutrient Removal

Manhattan College is performing an independent study using biosolids produced by Lystek, Cambridge, Ontario, Canada as an external carbon source (electron donor) for biological nitrogen removal process. Lystek biosolids treatment process is a low temperature thermal-chemical technology which using a combination of heat to 70-75°C (158 – 167°F), pH 9.5-10.0 using alkali / KOH, and high shear mixing treatment to convert biosolids into high solids (15-17%), homogeneous, pathogen-free, and nutrient rich liquid Class A EQ product.The objective of this study is to determine if the hydrolyzed Lystek product could be used as carbon source for BNR systems. Phase 1 is batch testing to determine potential as a carbon source and Phase 2 a more in-depth study using sequencing batch reactors. The Phase 2 study is to determine:Denitrification kinetics,Optimum COD:N ratio,Cell yield, andAlkalinity demand.Phase 1 has been completed and Phase 2 is expected to be completed by September 2015.