This pilot was formulated to assess the effects of large volumes of Oxygen in a 100,000 Gal. Aerobic Digester and to evaluate its ability to reduce both hauling and energy costs. Specifically we were looking for Total Solids reduction and increased Supernate. Other compounds tested include: TSS (total suspended solids , TP (total phosphorous), VSS (volatile suspended solids), TKN (total nitrogen), BOD 5-day, Ammonia, Total Alkalinity, PH, and Fecal Coliform. It is worth noting that the 66,000 Gals. in containment had been fully decanted by the operator, and was ready to be hauled. Two base samples were taken, then a weekly analysis for the duration of the pilot. This digester was retrofitted with a 15HP Taeration System mounted in containment, on the catwalk.
After 3 weeks of downward trending the Taeration System was turned off and the containment was allowed to settle from Friday evening to Monday morning. The results produced 36,000 Gallons of Supernate and reduced the TS to 1.5%. The chart below shows the reductions in other compounds tested. To be further noted, there was no detectable Fecal Coliform. The Taeration system will be evaluated by the EPA for the use in producing Class B wastewater effluent thus, allowing for direct land application without addition treatments such as Lime.