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 treatment plant will be ready for operation by late October 2025.

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

Modular scalability - the system has been designed to allow staged capacity increases, starting with 500 EP and scaling to 750 EP without disrupting operations
Operational reliability - the SBR technology is engineered to provide consistent performance with minimal operator input
Long-term durability - use of high-grade stainless steel and chemical-resistant coatings is expected to support system longevity and compliance in harsh conditions
Reduced manual handling - upgrades such as the IBC dosing system are intended to improve safety and reduce manual chemical handling on site
Effluent reuse and water savings - the disposal system is designed to HGCP specifications, enabling potential for spray field reuse and reduced freshwater consumption
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.

Download the Centurion PNG LNG Project Wastewater Case Study

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.

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