Macau Peninsula Wastewater Treatment Plant


This project is part of a complete restoration and upgrading of the wastewater treatment plant’s capacity, anticipating future reuse water standards.

This upgrade work includes improving of the existing treatment system, increasing its nominal capacity and enhancing effluent quality.

Operation and Maintenance

In connection with the contract that extends from 2011 to 2016, we operate and maintain the Macau Peninsula Wastewater Treatment Plant, enabling the Government to optimize their production costs associated with wastewater treatment, ensuring effective management of their assets and respecting standards and regulations in effect for health, the environment and quality.

As part of the operation and maintenance contract, we undertake, among other tasks:

  • Management of production and treatment processes, 24 hours a day, 365 days a year
  • Analytical monitoring throughout the treatment stages
  • Complete management of the assets’ life cycle, from preventive and corrective maintenance (repair) of electromechanical equipment, instruments and control systems, to renewal of assets
  • Integrated staff management and application of social responsibility rules
  • ISO 9001, ISO 14001, OHSAS 18001 and certifications


With a daily capacity of 144,000 cubic meters per day, existing water remediation is based on a conventional pretreatment and an activated sludge treatment process, divided in three treatment lines.  The capacity of the plant will be increased to 184,000 cubic meters per day and the activated sludge treatment process will be modified with an MBR (Membrane Bioreactor) system. The membrane technology used for wastewater treatment will allow the Government of Macau to reuse or reject water which meets quality standards. This will be one of the world’s largest MBR plants.

The sludge from the treatment process, dried by centrifuges, will be discharged into the Macau Refuse Incineration Plant.

Technical Data:


Existing plant (144,000 m3/day)

  • Coarse screen
  • Fine screen
  • Grit chamber
  • Lamella primary sedimentation tank
  • Biological treatment, activated sludge
  • Lamella Secondary sedimentation tank


Upgrading Plant (184,000 m3/day)

  • Coarse screen
  • Fine screen
  • Grit chamber
  • Lamella primary sedimentation tank
  • Biological treatment, 48,000 m3/d treat by activated sludge process
  • Biological treatment, 136,000 m3/d treat by MBR system