ABSTRACT
In wastewater treatment (WWT), advanced computational fluid dynamics (ACFD) is a rapidly expanding discipline applicable to practically all unit processes. This chapter introduces ACFD to several WWT unit procedures. Removing suspended growth nutrients and anaerobic digestion are two of these unit processes. Other examples include hydraulic aspects, such as flow splitting and physical, chemical, and biological procedures. The purpose of this study is to articulate the current state of practice as well as the need for research and development. The amount of capability that can be achieved using ACFD varies throughout the different process units, with such a high prevalence of use in the domains of subsequent sedimentation, activated sludge basin modeling and disinfection, and increased demands in primary sedimentation and anaerobic digestion. Although the techniques are comprehensive, in the sense that even though they may often contain non-Newtonian fluids, multiphase systems, and biokinetics, these models still need to be completed. As a result, further work must be done to meet the variety of process designs. Various other demands have been discovered, but the most prominent needs include enhanced particle aggregation, breakdown (flocculation), and enhanced coupling of biology and hydraulics.
