In order to achieve final effluent requirements, most often anaerobic treatment is not sufficient and it needs some post aeration step.

HydroThane is able to give complete solutions for aerobic treatment applications as post treatment to an anaerobic treatment plant, or as the main treatment step, depending on the case and type/quantity of wastewater.

Aerobic biological treatment is carried out based upon the principles of activated sludge process with biological nutrient removal (nitrogen and phosphorus) and in some cases separated sludge regeneration.

Oxygen supplied continuously activates the bacteria in order to start degrading the organic content, which will be subsequently converted to CO₂ and excess biomass.

The presence of nitrogen in any form requires the application of aerobic biological nitrification-denitrification in order to remove it in the desired level, but also to avoid this process to take place in the final clarifiers and as a result to have floating biomass.