Secondary settler (clarifier) design optimisation with CFD

Secondary clarifiers (or settlers) can be optimised using computational fluid dynamics (CFD). Inlet structure (energy dissipation well) and sludge removal mechanism can be designed using sludge solids and liquid modelling using density currents.

Client:

Solutions:

No items found.

Location:

Date:

Optimal effluent quality and settler reliability

We use computational fluid dynamics (CFD) simulation for optimisation, design and retrofit of secondary settlers (secondary clarifiers). Different inlet structures, baffles and scrapers can be tested with simulation, and settlers can be stress-tested with different MLSS concentrations and flow rates.

Major variables we assess

Sludge blanket height and velocity profiles in supernatant
Solids profile as function of depth
Optimal removal of settled sludge at the bottom of the settler

We can easily vary:

Design factors such as shapes, baffles, inlet structures, ...
Operational variables such as MLSS concentration and flow rates

No items found.

Suggested Projects

View all projects

No items found.

Ion Exchange

Optimising ion exchange column operation - Efficient removal of brine after regeneration

Computational fluid dynamics (CFD) was used to simulate ion exchange regeneration with brine. Brine wash out could be optimised, shortening the cycle time. Project together with Evides industriewater (Netherlands).

Chemical dosing

Optimal coagulant dosing in primary treatment of WWTP Auckland, New Zealand

Coagulant dosing in primary sedimentation tanks and grit tanks was optimised using computational fluid dynamics (CFD). Watercare's wastewater treatment plant (WWTP) of Auckland, New Zealand was retrofitted. Mixing and flow distribution.

Crystallisation

Design of a crystalliser - Urine treatment for phosphoruous recovery via potassium struvite precipitation

This crystallisation process was designed using computational fluid dynamics (CFD). Baffle, mixer (impeller) type and speed, reactor configuration was optimised using 3D multiphase cfd modelling. This was a struvite reactor.

Subscribe to our newsletter

Thank you! Your submission has been received!

Oups ! Un problème s'est produit lors de l'envoi du formulaire.