Many wastewater treatment plants use more than 50% of their total energy budget in the aeration basin and, when nutrient removal is included in the activated sludge process, it is very common that the majority of oxygen uptake goes to the nitrification process. For that reason, in most wastewater treatment plants, energy optimization is focused on nitrification management. 

This information can be obtained in different ways, but perhaps the most direct way is based on the correct control of the minimum dissolved oxygen (DOmin) and sludge retention time (SRT) without impairment of process efficiency. 

The present paper describes a relatively simple, fast, and novel method whereby.. Read more