Project Examples

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Operational cost saving while improving effluent quality Wastewater

Between 10 and 20 % improvement of optimisation criterion

For our client Waterschap De Dommel (NL) we tested different scenarios to optimise the plant both in terms of performance and operational cost. The optimal solution is currently being implemented. We used our proprietary and globally unique WWTP CFD model.

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World's most validated bioreactor CFD model - unique demonstration Wastewater

Accuracy of WWTP CFD never demonstrated like this before

We had a unique opportunity to execute a globally unique measurement campaign: measuring at 99 locations in a full-scale WWTP using a construction crane. We demonstrated the power and accuracy of our proprietary WWTP CFD model.

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Saving piloting costs and effort Wastewater

Scale-up of a novel ozonation reactor

For our client PureBlue we assisted in the scale-up of a high-transfer ozonation system. Based on multiphase CFD we provided basic insights on gas and water flow patterns, used to effectively design a test reactor system. The project is still ongoing, and the goal is to obtain effective full-scale design, while lowering scale-up costs and effort.

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Saving scale-up time, effort and cost Wastewater

Scale-up of a novel MBR reactor

This is a confidential project currently ongoing. This novel reactor concept will be scaled-up and the challenge lies in finding the optimal dimensions and operational settings. Trial and error based scale-up via piloting is highly risky and we will use multiphase CFD, combined with kinetics to virtually simulate and scale-up the concept.

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Improving flow patterns in a large drinking water reservoir Drinking water

Making retrofit decisions

Non-uniform discharge, dead zones and partly long residence time cause deterioration of the water quality. Relocation of the outlet structure could improve the general flow behaviour in the reservoir

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Design of a crystalliser Wastewater

Optimal impeller speed and baffle design

We tested 4 design scenarios before the reactor was constructed. Both the optimal baffle configuration and impeller speed were determined using CFD.

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Water tower optimisation to guarantee water quality Drinking water

Reducing the risk of bad mixing

Pidpa wanted to limit the risk on water 'aging' and hence, regrowth. CFD gave the necessary insights to take a measure that will significantly improve mixing and lower the risk.

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Increasing accuracy of in-line suspension monitoring Pharma manufacturing

In-line NIR measurement channel

An optimal CFD-based design avoided turbulence in the pipe and increased sensor accuracy

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Improving aeration and ammonia profile Wastewater

Quantifying inhomogeneous mixing and biokinetics

We combined CFD with biokinetics and showed that surface aerators due to their design limitation have a significant impact on ammonium removal. Ammonium concentrations tended to accumulate at the bottom due to less dissolved oxygen concentrations.

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Optimising ion exchange column operation Drinking water

Efficient removal of brine after regeneration

CFD was used to visualize dead zones in the lower part of an ion exchange column. Different optimisation strategies were tested.

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Improved effluent predictions (secondary settler) Wastewater

Accounting for discrete settling

A flocculation model was combined with CFD. Outcomes could be used for settler design.

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Quantifying nitrous oxide emissions in wastewater treatment plants Wastewater

Impact of hydrodynamics on biokinetics

Greenhouse gas emissions from wastewater treatment plants (WWTPs) are a growing concern. Production of the strong greenhouse gas nitrous oxide (N2O) in WWTPs strongly depends on local oxygen concentrations in the large bioreactors. Only by accounting for hydrodynamics, accurate predictions of N2O emission can be obtained.

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