North Carolina State University researchers find “statistically significant differences between bioaugmented and untreated cycles were detected for several chemical and physical parameters” when the effluent of grease interceptors was analyzed. “The treated cycles had lower BOD and COD at the grease interceptor outlet”. For the full article see Xia He, Jason Osborne, Francis L. de los Reyes, III. (2012) Physico-chemical Characterization of Grease Interceptors with and without Biological Product Addition. Water Environment Research 84:195-201.