However, after FOG is biologically converted to glycerol and fatty acids by Bio-Amp, there is a concern that these soluble organ- ics may enter the aqueous phase, resulting in increased chemical oxygen demand (COD) and nutrient levels in wastewater entering the treatment plants. Furthermore, it was recently shown that cal- cium may be released from biologically induced concrete corrosion (O’Connell et al., 2010; Bielefeldt et al., 2010), and FOG deposits, which display adhesive, grainy and sandstone-like texture, can be formed as a result of a saponification reaction between fatty acids and calcium ions and lead to undesirable sewer line blockages (He et al., 2011).