• 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

  • 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.

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.