Traditional produced water treatment is usually comprised of hydrocyclones followed by degassing or flotation processes. Increasingly stringent environmental discharge requirements plus the constant pressure to reduce equipment footprint have led to the development of the Compact Flotation Unit (CFU). Veolia has taken this process forward to the next level with the Cophase™ CFU.



 

 

 



 

 

 

 





### Benefits / Key Features

 

Self regulating oil skimmer eliminates gas and reduces water in the reject stream



 

 

 

 

 

 



 

No motor or pump consuming power



 

 

 

 

 

 



 

No need for pressurised water or gas; in most cases no gas consumption at all



 

 

 

 

 

 



 

Skimmed flow minimised to <1% of total flow



 

 

 

 

 

 



 

One minute retention time reduces vessel size and weight



 

 

 

 

 

 



 

100% of the inlet flow passes through the LoHead™ eductors ensuring excellent gas/liquid contact and superior separation performance



 

 

 

 

 

 



 

Highly tolerant of typical FPSO motion



 

 

 

 

 

 



 

No rotating parts to maintain



 

 

 

 

 

 



 

Designed for high flow rate



 

 

 

 

 

 



 

 

 





 Design Philosophy.

 The Cophase™ CFU LoHead™ eductor design is unique in that 100% of the inlet flow is fed through the gas eductors, thus maximising bubble generation and contact between the oil droplets and gas bubbles. By enhancing the opportunity for contact between the oil droplets and the gas bubbles, greater oil removal efficiency for a given vessel volume is achieved.



 

 

 

 

 

 





 



 How it works.

 The LoHead™ eductor design also generates a vortex within the separation volume. This vortex applies centripetal force upon the heavier water and solids, forcing them to the periphery of the vessel and therefore concentrating the oil and gas bubbles in the centre and so aiding agglomeration and coalescence.

An important feature of the Cophase™ CFU is that this vortex, combined with the internal geometry of the vessel has been designed using Computational Flow Dynamics (CFD) to suppress backmixing in the vessel. This means that the water passes through the separation volume in what is termed "rotating plug flow", which leads to a higher oil removal efficiency than is achieved in the older designs of flotation units currently available.



 

 

 

 

 

 





 



 

 





 

 





 

 





 

 





### Resources

 

    [View our brochures](https://www.vwswestgarth.com/resources/brochures)

    [View our videos](https://www.vwswestgarth.com/resources/videos)

    [View our case studies / references](https://www.vwswestgarth.com/resources/case-studies-reference-list)