Treatment Plant was used; and, ammonium sulfate and mono-potassium phosphate from the standard recipe were excluded as the wastewater contained adequate N and P for biomass growth.Initial conditions in Test I (after filter-sterilization) are summarized in Table 1. Daily samples drawn over a period of 6 days were cen-trifuged and the filtered (0.2 micron) supernatant was analyzed for ammoniacal-nitrogen, phosphates, and BOD 5