Aeration is an essential process in most wastewater treatment systems, representing the highest energy cost. Through aeration, oxygen is transferred into the liquid media and utilized by the microorganisms for the removal of organic matter and nutrients. Oxygen can be transferred by shearing the liquid surface with a mixer or turbine, releasing air through macroscopic orifices or porous materials, or through direct contact of air and a large water surface.
This course consists of 3 video lectures recorded by Prof. Michael K. Stenstrom in collaboration with Dr. Diego Rosso from the University of California, US. In this course, the main parameters used to measure and assess the performance of aeration systems are presented. It describes their main features, characteristics, advantages and drawbacks in order to provide certain guidance for the selection of the most suitable aeration system in accordance to local operating and design requirements. Suggestions for sustainable aeration practices, such as energy conservation strategies, are also discussed and a design algorithm is introduced for the selection of an appropriate aeration system.
Time Framework for the Course: 1 week