Problem: The Jacksonville Beach (Florida) Water Reclamation Facility’s digesters were using excessive energy, lacked homogeneous mixing and were not optimized.
Solution: Contrary to the common belief that aerobic digestion requires continuous aeration, a more effective and energy-efficient approach is cycling between mixing and aeration. This process improves nutrient reduction, alkalinity, dewaterability and volatile solids destruction by supporting endogenous respiration and nitrification. The HYPERCLASSIC Mixing and Aeration System from INVENT Environmental Technologies performs both mixing and aerating in one device, reducing the need for multiple equipment types. Additionally, since the device maintains a homogeneously mixed basin both with and without aeration, it allows for a unique level of process control and optimization. The enhanced control over aerobic digestion reduces operational costs and chemical addition, while improving energy efficiency. Its design includes a non-clogging hyperboloid mixer-body that ensures continuous, efficient mixing and aeration, even at high MLSS levels.
Result: The aerobic digesters treat to 3% solids in three circular tanks and provide consistent quality feed to their dewatering process. The treated biosolids continue to meet Class B standards. 973-571-2223; www.invent-et.com
