Digital Rendering of Wastewater Treatment Plant

The Finished Wastewater Treatment Plant

Special Features

Membrane type: Zenon 500 hollow fiber
No. of Trains: 2
Controls: Fully automated
Disposal: Public Access Reuse
Disinfection: Automated dry chlorine feeder

Westin Resort, St.John
Membrane Bioreactor Wastewater Treatment Plant

In October 1999, TSG was commissioned by Westin to replace an obsolete wastewater treatment facility. TSG designed, permitted and constructed the first membrane based wastewater treatment facility in the Caribbean. The new 100,000-gallon per day, state-of-the-art wastewater treatment plant was placed into service in May 2000.

The system consists of a suspended growth biological reactor integrated with a microfiltration membrane system utilizing the ZenoGem® Process and Zenon membranes. This microfiltration system replaces the solids separation function of secondary clarifiers and sand filters in a conventional activated sludge system and ensures that no particulate matter is discharged in the effluent. The ZenoGem® Process is a proprietary technology.

As with the desalination plant, this project required the removal of the outdated equipment, renovations to the buildings, and installation of the new equipment while maintaining the resort's wastewater treatment capability at all times. The membrane modules were submerged in an active aeration basin to prevent plant shutdown.

TSG owns, operates and maintains this wastewater plant, and its related seawater reverse osmosis plant under a long-term agreement.

"TSG has been a fantastic partner of ours with providing us a waste water treatment plant that has never failed us since its installation. Having the peace of mind knowing that your wastewater plant is being monitored 24 hours a day, with no breakdowns in over three years, has been a critical part of our success. We are very fortunate to have a great team from TSG with competent and professional staff that are always there for us. They have gone above and beyond on many occasions to assist us in non related repairs and support throughout our operation. When you are running 92% year to date occupancy with a full house of demanding guests, it is nice to know you have TSG as a great partner ensuring nothing is going to fail on your wastewater treatment. I look forward to their team effort and expertise for many years to come."

Graeme Davis, General Manager