Wastewater treatment is a vital process, one that can have many challenges - and cost is often one of the biggest. Using aeration technology can have multiple benefits, whether that relates to performance, reliability or energy efficiency. Proper aeration is a crucial part of the process, as it will ensure that organic compounds are biologically decomposed. The air itself is, of course, a free resource. However, aeration systems can be incredibly costly, not just in terms of paying for the infrastructure but also the energy - new research has revealed that aeration can account for up to 90% of the energy costs of a wastewater plant. Different plants tend to have a range of different aeration needs and these are generally met either by surface aeration or air being introduced at the bottom of a tank, with the former often the more costly option.