Roadtrain® Delivers Safe Environmental Discharge for Saibai STP
Located just 4km from Papua New Guinea (PNG), Saibai Island is the Northern most Island of the Torres Straits, with approximately 500 residents. A new sewage treatment plant was commissioned to deliver high-quality water for environmental discharge into the Arafura Sea.

Hydroflux Epco’s well proven Roadtrain® RBC Decentralised Solution was selected for the Island due to its excellent track record in similar installations providing high-quality discharge. The process has been specifically designed to suit remote installations and standardized across The Straits in six locations.
The Hydroflux range of decentralized solutions are tailored to suit sites such as Saibai. We prioritise delivering infrastructure that is suited specifically to resorts, villages, remote communities and mining camps. Our range of Roadtrain® transportable sewage solutions include the ORIGINAL, PLUS, ADVANCED and ULTRA. The process selection for each site is targeted to suit the application, the location, and the capabilities of the operational staff on the ground.

Saibai Roadtrain® Key Data – Proof of Performance Testing
- Average dry flow of 140 kL/d, with peaks recorded up to 280 kL/d
- BOD5 < 2 mg/L
- Ammonia < 0.1 mg/L)
- Total Nitrogen < 7 mg/L
- Total Phosphorous < 0.95 mg/L
- Oil and Grease < 1 mg/L
- Faecal Coliforms < 10 cfu/100mL
Globally there are over 150 Roadtrain® systems that have been used for a variety of decentralized applications. Installations from the late 1960’s in South Australia, Victoria, New South Wales, Queensland, Papua New Guinea and the Middle East are still in operation, demonstrating the robustness of design and life cycle benefit of using engineered tanks as opposed to modified containers.
The project was completed in 2021.