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FRP in Water and Wastewater Treatment Applications
Overview
This Tech Talk Tuesday session focuses on the use of FRP in the water and wastewater industry, with specific attention on corrosion-resistant access systems, odour control covers, baffle walls and related treatment plant infrastructure. The webinar explains why FRP is well-suited to wet, chemically aggressive and corrosive environments where materials are exposed to hydrogen sulphide, chlorine, sewage, industrial wastewater, effluent and other treatment process conditions.
The session also introduces Treadwell’s SureLine HD panel system for odour control covers, along with FRP baffle wall solutions that can be used in both new and retrofit treatment basins. These systems are designed to help water authorities, engineers, and contractors improve durability, reduce maintenance demands and simplify installation across wastewater treatment plants, chlorine contact tanks, inlet works, vortex systems, pumping areas and other process zones.
Treadwell positions FRP as a practical alternative to traditional materials such as steel, aluminium, stainless steel and concrete in demanding industrial environments, with a focus on long design life, reduced corrosion risk and engineered solutions for site-specific applications.
Key Benefits
Corrosion resistance in harsh treatment environments
FRP does not rust and can be specified with appropriate resin systems and raw materials to withstand wastewater conditions, hydrogen sulphide exposure, chlorine contact areas and other corrosive process environments. This makes it suitable for long-term use in water and wastewater assets where corrosion is a constant challenge.
Reduced maintenance over the life of the asset
The webinar highlights that FRP can reduce the need for ongoing blast and paint regimes, concrete remediation, membranes, admixtures and other protective treatments often required for traditional materials in corrosive water treatment environments. Treadwell also notes that FRP integration in wastewater facilities can help reduce maintenance demands and extend the service life of critical components.
Lower installation effort due to lightweight construction
FRP structural components can be significantly lighter than traditional alternatives, which can reduce crane requirements, improve site handling and support safer installation. In the webinar, an example is given of large FRP beams being manually handled by a small team, reducing lifting complexity and improving installation efficiency.
Design flexibility for complex plant layouts
FRP systems can be designed for rectangular, round and irregular tank forms, as well as custom stacks, ducting interfaces, hatches, removable panels and integrated access features. This allows Treadwell to support both new treatment plant construction and upgrades to existing facilities.
Trafficable odour control cover options
The SureLine HD cover system can be supplied as a trafficable cover designed for access requirements such as AS 1657 2.5 kPa and 1.1 kN point load, depending on the project requirement. This allows operators to walk on the cover for inspection, sampling and maintenance without relying on more complex height safety arrangements in many situations.
Sealed odour control performance
The SureLine HD system uses interlocking double skin panels and can be configured for high levels of sealing, depending on whether the project requires full sealing or a seal in the range of 96 to 97 per cent. The webinar also notes that the system has not failed a smoke test to date, reinforcing its suitability for odour control applications.
Removable panel access for maintenance
Individual central panels can be removed without dismantling the entire cover from one end. This improves maintenance access and makes it easier to reach specific sections of a tank, inlet works or treatment zone when needed.
Long-term performance in wastewater projects
The session references FRP products used in water and wastewater treatment environments for more than 15 to 20 years without observed degradation in certain applications. One example describes FRP being removed, cleaned, inspected and reinstalled after the surrounding concrete had deteriorated.
Environmental and lifecycle advantages
Treadwell highlights FRP composites as an alternative material with potential for long design life and reduced environmental impact when compared with certain traditional materials. Its sustainability pages state that Treadwell pursues composite solutions that provide similar or better qualities while aiming to minimise environmental impact.
Applications
Odour control covers for wastewater treatment plants
SureLine HD panels can be used as sealed covers for wastewater assets such as inlet works, grit vortex areas, tanks, bar screens, pumping zones and other locations where odour containment and controlled extraction are required. The system can be configured with ducting interfaces, flashings, access sections and removable panels to suit process requirements.
Trafficable tank and process covers
Where operators need safe access for inspections, sampling and routine maintenance, Treadwell can supply trafficable FRP covers. These provide a practical alternative to non-trafficable tank roofs where maintenance access would otherwise require additional fall arrest or height safety controls.
Non-trafficable covers and tank roof systems
The webinar also notes that non-trafficable covers or tank roof type systems are available where regular access is not required. This allows project teams to choose the right level of structural performance based on how the cover will be used.
Baffle walls in new and retrofit basins
FRP baffle walls can be used in new basins or retrofitted into existing tanks and ponds. The Glenfield example discussed in the webinar involved converting an existing pond or lagoon into a chlorine contact arrangement, with FRP baffle walls installed without major concrete demolition.
Chlorine contact tanks and treatment chambers
The session specifically refers to FRP baffle walls in chlorine contact applications, where wastewater or effluent flow paths need to be controlled to achieve the required contact time. FRP can be specified to suit chemical exposure in these treatment environments.
FRP ductwork and cover interface systems
At the Bolivar project in South Australia, Treadwell supplied SureLine odour cover systems as well as FRP ductwork. The webinar explains that having one party design both the cover and ducting interface can reduce coordination issues and improve site fit.
Large span cover systems with reduced support structure
SureLine HD panels are available in different depths and can span several metres depending on load and product selection. This can reduce the need for multiple intermediate columns, heavy roof framing and complex support structures.
Integrated hatches and safety grates
The cover systems can include lockable or non-lockable hatches, along with safety grates below the hatch opening. This supports safer inspection and sampling by allowing operators to access the process area while reducing fall risk.
Corrosion-resistant access infrastructure
Although the session focuses on odour covers and baffle walls, it also identifies FRP ladders, handrails, staircases, platforms and access structures as relevant solutions for the water and wastewater sector. These are especially useful where corrosion, moisture and chemical exposure make traditional materials difficult to maintain.
Treatment plant upgrades and asset renewal
The webinar includes examples from Black Rock Water Treatment Plant in Victoria, Bolivar in South Australia and Glenfield, showing how FRP can support both new infrastructure and upgrades to existing wastewater assets.
Key Moments
- 00:20 👋 Welcome to Tech Talk Tuesday at Treadwell on FRP uses in water and wastewater sectors.
- 01:14 💧 Session focuses on FRP products like odour control covers and baffle walls for corrosion-prone water treatment environments.
- 01:28 📅 Ozwater 2026 event highlighted: May 26-28 in Brisbane, with Treadwell exhibiting water sector products.
- 02:53 🛡️ FRP chosen for superior corrosion resistance against chemicals like H2S and chlorine, unlike steel or concrete.
- 03:35 💰 Key benefits include design flexibility, competitive upfront costs, and long-term savings versus aluminium or stainless steel.
- 04:17 🔧 Lightweight FRP reduces installation costs, crane needs, and safety risks while enabling easy handling by small teams.
- 05:28 ⏳ Proven 15-20+ year lifespan in wastewater with no degradation; easy removal, cleaning, and reinstallation.
- 06:27 🛠️ Storeline HD interlocking double-skin panels for sealed odour control covers, customizable for 96-100% sealing and vacuum use.
- 07:22 🔄 Removable central panels allow maintenance access without full cover disassembly; trafficable to AS 1657 standards.
- 09:43 🚫 Free-spanning covers eliminate intermediate supports, saving weight, structure, and installation time over traditional roofs.
- 09:58 🔒 Integrated lockable hatches with safety grates for safe sampling and access without fall protection systems.
- 10:27 🧱 Baffle walls easily retrofitted into existing tanks with minimal concrete work for process optimisation.
- 11:49 ⚠️ Solid FRP grating avoided for sealed odour covers due to sealing difficulties and higher labour costs.
- 12:59 🏗️ Full FRP systems integrate covers, supports, and ductwork for better fit, performance, and single-supplier accountability.
- 15:27 📞 Contact Treadwell: 1800 246 800 (AU), sales@treadwellgroup.com.au, or hello@treadwellgroup.com.au for projects.
Why Treadwell?
Treadwell has been working in the FRP industry since 1994 and has grown from its original Adelaide base into an established FRP solutions provider with installations across Australia and New Zealand. Its experience covers engineered composite systems, anti-slip materials, grating, access structures and project-specific FRP solutions for industrial sectors.
For water and wastewater projects, Treadwell offers more than individual FRP components. The webinar shows that the team can support design, fabrication and supply of integrated systems such as SureLine HD odour control covers, FRP ducting, hatch systems, structural supports and baffle walls. This helps reduce interface issues between separate suppliers and allows project teams to coordinate performance, sealing, access and installation requirements through one technical partner.
Treadwell’s FRP wastewater solutions are built around long-term corrosion resistance, reduced maintenance, practical installation and lifecycle value. With project examples in demanding treatment environments and technical support available for drawings, site discussions, custom panel layouts, trafficable covers and retrofit baffle wall applications, Treadwell can help engineers, contractors and water authorities select FRP systems that are fit for purpose and practical to maintain.
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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.
