VWS Westgarth Office Contact

Orbital House
3 Redwood Crescent
East Kilbride
G74 5PR

+44 (0)1355 588 000
Fax: +44 (0)1355 588 001


Veolia Water Oil & Gas Angola Contact:

Viana Park
Pavilhão nº1 Quarteirão 9
Estrada do Calumbo
Pólo Industrial de Viana
República de Angola

Tel: +244 940 120 949
Tel: +244 949 229 399


Membrane Filtration


Conventional pre-treatment consisting of media filtration followed by cartridge filtration has been the preferred traditional system.

However this process suffers from the inevitable weight and size limitations imposed by large vessels plus significant operating costs from cartridge filter change-outs. In addition, as offshore systems are very susceptible to the annual summer bloom period, where concentrations of small organic particles and organisms increase exponentially, traditional filtration methods have been successful in reducing particles above 2 micron. This reduction is not sufficient to limit fouling on the sulphate reduction membranes.

Alternative mechanical type filters have recently been introduced to the market providing a smaller footprint, but still not addressing the sub 2-micron issue.

VWS Westgarth's Membrane filtration system provides an ideal platform for SRP pre-treatment.

The membranes used are chlorine resistant and the system design provides facility for the oxidation and removal of any organic species trapped on the membrane surface during filtration. The membrane provides a complete barrier against particles larger than approximately 0.1 microns, thereby removing most species that lead to SRP fouling and plant downtime due to membrane cleaning.

By providing this technology to installation operators, SRP cleaning downtime would be significantly reduced and pre-treatment integrity ensured.

SRP module

The system could be designed to replace existing filtration systems on SRP packages and thereby increase system uptime and reduce operating costs.


  • Reduced filtration module size/weight
  • Reduced sulphate removal module size/weight
  • Chlorine resistant membranes enhances biofouling cleaning ability
  • Constant feed water quality to SRP (0.1 micron filtration)
  • Reduced SRP cleaning resulting in greater injection system uptime and increased sulphate removal membrane life
  • Cartridge filtration eliminated
  • Reduced Opex in comparison with traditional pre-treatment systems