- Asia Pacific Rentals & Services
- 20/05/2025
NEW WASTEWATER SYSTEM SUPPORTS PNG LNG FACILITY EXPANSION
Centurion Water & Wastewater Solutions is delivering a modular Sequencing Batch Reactor (SBR) wastewater treatment system for an LNG project in Papua New Guinea, designed to support a growing workforce and integrate with existing infrastructure. The staged system will scale from 500 to 750 EP, with durability, efficiency and future expansion built into the design.

The Client
A leading energy company with an LNG project in Papua New Guinea.
Client Challenges
- Scalable design - the solution needed to integrate with the existing Hides Gas Conditioning Plant (HGCP) SBR system and support future capacity increases
- Fluctuating camp populations - workforce fluctuations required a system capable of handling significant variation in flow and load
- Material durability - all infrastructure had to withstand harsh environmental conditions, necessitating high-grade stainless-steel materials
- Reliability and minimal operator involvement - the plant needed to operate reliably with minimal manual operation
- Options to reuse infrastructure - cost-effective use of existing infrastructure was a priority to reduce overall capital expenditure.
Our Solution
Centurion is delivering a comprehensive wastewater treatment solution with a focus on modularity, durability, and efficiency:
500 EP SBR Wastewater Treatment Plant
- Modular design similar to the existing HGCP SBR system for seamless integration
- Tanks fabricated from 316 stainless steel for superior durability in challenging environments
- Engineered for easy operation and maintenance.
250 EP Expansion Module
- Scale the existing system’s capacity from 500 EP to 750 EP
- Includes a 90m³ balance tank (316 stainless steel) and an anoxic/aerobic tank constructed from carbon steel with a chemical-resistant coating
- Integration with existing infrastructure, including the sewage pumping station, sludge storage, and treated effluent tanks.
Expected Outcomes
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Modular scalability - the system has been designed to allow staged capacity increases, starting with 500 EP and scaling to 750 EP without disrupting operations
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Operational reliability - the SBR technology is engineered to provide consistent performance with minimal operator input
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Long-term durability - use of high-grade stainless steel and chemical-resistant coatings is expected to support system longevity and compliance in harsh conditions
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Reduced manual handling - upgrades such as the IBC dosing system are intended to improve safety and reduce manual chemical handling on site
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Effluent reuse and water savings - the disposal system is designed to HGCP specifications, enabling potential for spray field reuse and reduced freshwater consumption
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Cost efficiencies - reusing the existing sludge dewatering system from the 500 EP plant is expected to minimise additional capital investment
Conclusion
Centurion Water & Wastewater Solutions is in the process of delivering a modular, high-performance wastewater treatment plant tailored to meet the evolving needs of ExxonMobil's LNG project. Through a combination of durable construction, scalable design, integration with existing assets, and the reuse of infrastructure, once complete, Centurion would have delivered a fully compliant, cost-effective solution for the client.
Contact Information
For more information, contact the team in Perth, Western Australia at E: CWWSAU@centurionaprs.com, T: +61 8 9331 6133, or in Brisbane, Queensland on T: +61 447 610666.
Have a look at our other case studies.