Aeration of wastewater in activated sludge treatment processes is a necessary requirement in debugging nowaday.The microorganisms that decompose organic waste need oxygen to live, oxygen taken from the atmosphere. This justifies the additional purpose of mixing the return activated sludge (RAS) with the wastewater. There are several technologies to aerate the activated sludge.
The most popular in most cases is by the flotation of the dissolved air. The air is introduced inside the tank through a pipe system equipped with diffusers and placed in the bottom. Finally, a large centrifugal blower providing the air source. The process of flotation by dissolved air requires the use of sensors for controlling the air flow and pressure in the injectors. The thermal sensors that Toscano offers, provide an excellent alternative to the control airflow. Toscano offers pressure sensors and indicators to control the air pressure inside the tank. The pressure and flow can be used to control the dirt in the diffusers.
In some treatment plants should be controlled the level of the activated sludge in the process. This application is especially important in plants located in regions with humid climates that receive a large supply from sewers that collect storm water and sanitary hot water.