Managing High Solids Processes in Aerobic & Anoxic Environments

This presentation will review the current design approach for mixing systems used on high solids concentration, process fluids within wastewater treatment processes. The operational state of fluids can be either aerobic or anoxic and requires the mixing systems to maintain these environments. Methods of ‘old school’ mixing design approach will be evaluated against today’s operational methods of wastewater treatment. Designing systems that have low maintenance demand in highly aggressive process fluids is key to the longevity of the system operation. The applied design approaches of Computational Fluids Dynamic (CFD) modeling and Velocity Gradient modeling for mixing systems will be evaluated. Application of these modeling methods provides the means to apply specific fluid characteristics as well as specific geometrical characteristics for the mixing ‘Environment’ design. High solids fluids are also resistant to the transfer of oxygen to a dissolved state within the fluid. Methods of adjustment of the oxygen transfer equation to account for this resistance will be presented. The application of multi-port distribution and mixing system configurations will be evaluated through CFD modeling, mathematical modeling, and field installations.