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West Camden STP FRP Odour Control Cover Case Study
This page focuses on the West Camden Sewage Treatment Plant project in Sydney, NSW, where Treadwell supplied an FRP odour control cover solution for a Sydney Water wastewater treatment facility. The project formed part of ongoing site upgrades and required improved odour control across key process areas, while keeping installation efficient and minimising disruption to operations.
Treadwell was engaged by Downer BMD to deliver the odour control scope end to end. The solution began with EcoEX™ SureLine® Heavy Duty odour control covers and developed into a lift-in / lift-out cover system mounted on a custom ArchitEX™ FRP L-Beam pultrusion system. This approach allowed approximately 1,500 sqm of covers to be installed over the balance tank area within two days.
The scope also included FRP odour ducting, EcoEX™ hatches, associated fasteners and support brackets, and GratEX® FRP square grating. The installation was completed without the need for on-site fibreglass connections, helping simplify delivery and reduce time on site.
Key Benefits
Fast installation with reduced site disruption
Complete odour containment solution
Corrosion resistance in harsh sewage treatment conditions
Low maintenance performance
Airtight hydraulic sealing for odour control
Lift-in / lift-out panel functionality
Lightweight FRP handling advantages
Operational access and safety support
Reduced on-site fibreglass works
Applications
Sewage treatment plant balance tanks
This solution was used over the balance tank area at West Camden Sewage Treatment Plant, where a large-scale odour control cover system was required across approximately 1,500 sqm.
Odour control upgrades on existing tanks
Hydrogen sulphide exposed environments
Large scale lift-in / lift-out cover systems
Trafficable treatment plant covers
Odour ducting integration
Treatment plant projects requiring minimal downtime
Access hatches and safety grate integration
FRP structural support integration
Key Moments
- 00:15 👋 Tech Talk Tuesday introduces the West Camden Sewage Treatment Plant case study and Treadwell’s odour-control upgrade work.
- 01:36 🤝 The West Camden project was completed for Sydney Water, with Downer and BMD as the client joint venture.
- 02:03 📍 The upgrade focused on covering an existing balance tank and a new inlet structure at the large West Camden plant in southwest Sydney.
- 03:37 ⏱️ A major project challenge was the very short access window available to lift covers onto the existing tank.
- 04:33 🧪 Hydrogen sulfide build-up was a long-term issue, requiring coated concrete walls and Shoreline EcoEX covers for protection.
- 05:17 🧱 Shoreline Heavy Duty panels are dual-skin, 104 mm thick FRP panels with a tongue-and-groove connection system.
- 06:28 🔩 The L-beam solution allowed the system to seal over coated or lined concrete without fixings penetrating the liner or seal.
- 08:08 🛡️ The Shoreline panel includes a sacrificial lower layer designed to withstand hydrogen sulfide exposure, with live installations performing since 2014.
- 09:16 🚚 Large lift-in/lift-out frames can be manufactured up to 13.5 m long and 3.3 m wide for Australian road transport.
- 10:37 🏗️ Custom FRP covers enabled rapid installation, easy access, and effective odour containment across the tank.
- 11:02 📆 All large cover panels were lifted into place over a 2-day period.
- 11:19 🚪 Integrated hatches include odour-control seals, removable safety grates, and options for internal attachments such as power rails.
- 12:39 🧰 The solution used custom ArcTEX L-beams, Shoreline Heavy Duty covers, EcoEX hatches, safety grates, bracketry, and fiberglass grating.
- 13:31 🌏 Treadwell supports odour-control projects across Australia, Southeast Asia, New Zealand, and emerging opportunities in the UK.
- 15:30 ⚗️ Resin selection is critical in sewage environments because standard polyester resin is not suitable for hydrogen sulfide exposure.
- 16:52 ✅ Vinyl ester resin should be specified for FRP products exposed to hydrogen sulfide in wastewater applications.
- 17:17 📐 Treadwell covers commonly target a 25-year design life, with some resin-backed applications supporting 50–55-year design life.
- 18:04 ⚖️ Typical access loading is 2.5 kPa under AS 1657, with higher or lower loadings depending on span and access requirements.
- 19:33 🔥 Treadwell products can meet NCC fire-rating requirements and ASTM E84 expectations for self-extinguishing, non-fuel behaviour.
Why Treadwell?
Treadwell delivered more than a cover product for West Camden Sewage Treatment Plant. The team provided an end-to-end FRP odour control solution that included SureLine® HD covers, custom ArchitEX™ L-Beam profiles, FRP hatches, fasteners, support brackets, GratEX® grating and odour ducting.
The project demonstrates Treadwell’s ability to adapt a standard odour control cover system into a site-specific solution. By developing a lift-in / lift-out arrangement with integrated lifting points, Treadwell helped simplify installation, future access and long-term maintenance.
Treadwell’s advantage is especially clear in harsh wastewater environments where corrosion, odour containment, installation speed and operational access all matter at the same time. The West Camden project required a durable system that could resist hydrogen sulphide exposure, support safe access, avoid regular repairs and be installed quickly across a large tank area.
For wastewater treatment plants, asset owners and contractors, Treadwell provides FRP odour control systems that combine corrosion resistance, lightweight construction, custom structural detailing and practical installation support. This makes Treadwell a strong partner for sewage treatment plant upgrades where performance, safety and reduced site disruption are critical.
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*Disclaimer
The information on this page is derived from webinar content and AI-assisted transcription and summarisation. While every effort has been made to ensure accuracy, minor inaccuracies may occur. We recommend viewing the original webinar recording for context.
