Aerobic Digester Reduces Nutrient Return And Improves Energy Efficiency

Faced with rising operational costs due to increasing energy and chemical prices, as well as stricter effluent permit limits, many operators and engineers are turning to performance optimizers and controls automation to enhance treatment processes and reduce operating costs while limiting capital expenses.

To overcome these challenges, an advanced process control solution was implemented in an aerobic digester in Green Lake, Wisconsin. By controlling the process in a smarter way, the solution significantly reduced phosphorus and nitrogen in the returns to the main treatment process and reduced energy consumption and wear on the blower.