Use of CFD to improve wastewater treatment plants

Pöyry is an international consulting and engineering company that serves clients globally in the energy and industrial sectors. Pöyry being a “connected company”, applies Computational Fluid Dynamics as a tool to solve complex engineering problems that tangent a broad spectrum of its engineering services worldwide. Current presentation is focused on waste water treatment plants and the way how various issues are analyzed and resolved using CFD.  

CFD modeling and optimization of a cooling pond

Phosphate fertilizer plants are installations constantly evolving which make their design a challenging task. Phosphogypsum, a by-product of the manufacture of phosphoric acid, is piled up, forming stacks which may eventually alter the process efficiency as they encroach on process cooling ponds and locally modify the airflow fields. The increase of computational power and its easier access allow to fully consider the use of CFD within tight-schedule industrial projects, even the ones involving large-scale geometry.

CFD analysis of sedimentation phenomena

Separation of suspended solids is one of the most important operations in a wastewater treatment plant (e.g. clarifiers). The range in solid sizes and their topology, usually found in wastewater, has led to a diverse set of separation approaches, which, as a consequence, also leeds to a diverse set of simulation methods when using CFD to tackle this subject (Wicklein et al, 2016). The basic distinction between methods lies on how the suspended elements are considered: either as a continuum (Eulerian approach) or as a discrete field (Lagrangian approach).