Energy Regeneration Sewage Treatment Solution


Rather than consuming lots of energy for purifying sewage, this low-energy bioreactor can capture over 90% of carbon from sewage to produce biogas as renewable energy. In addition, this bioreactor only occupies 30% of carbon footprint as compared with conventional sewage treatment system, thus saving plenty of land resources from sewage treatment works.

  • Energy Regeneration Sewage Treatment Solution
Technical name of innovation
Circulating Bed Biofilm Reactor for Carbon Capture from Wastewater
Commercialisation opportunities
Technology licensing agreement
Problem addressed

Over one billion cubic metres of sewage is generated around the world daily, consuming a huge amount of energy, equivalent to approximately 260 million kWh, for sewage treatment. This also incurs high carbon emisison.

  • Be leveraging biofilm to immobilise micro-organisms on floating carriers, while using innovative mixing strategy, this innovation consumes only 20% of energy for aeration as compared with conventional bio-treatment system.
  • This innovation can help upgrade the existing sewage treatment processes to reduce the operating cost and carbon footprint.
  • This innovation can be integrated with other advanced sewage treatment technologies to generate novel sewage treatment processesm thereby achieving carbon neutral.
Key impact
  • This technology can capture over 90% of carbon from sewage to produce biogas as renewable energy.
  • It is estimated that a total of around 250 million kWh of renewable energy can be produced from the carbon of all sewage in the world.
  • Reduce 20% of the energy for aeration and 30% of carbon footprint.
  • Gold Medal at the “2021 Geneva International Exhibition of Inventions”
  • “Innovation Awards” at the TechConnect World Innovation Conference and Expo 2021 (TechConnect)
  • Municipal sewage treatment


  • Hong Kong Short Term Patent (HK1057448)
  • China Invention Patent (File no. 202010069859.3)
  • China Utility Model Patent (File no.: 202020137267.6)
  • China Utility Model Patent (ZL 2021 2 1565547.8)
Hong Kong Productivity Council (HKPC)

The Hong Kong Productivity Council (HKPC) is a multi-disciplinary organisation established by statute in 1967, to promote productivity excellence through integrated advanced technologies and innovative service offerings to support Hong Kong enterprises. HKPC is the champion and expert in facilitating Hong Kong's new industrialisation empowered by i4.0 and e4.0 - focusing on R&D, IoT, big data analytics, AI and Robotic technology development, digital manufacturing, etc., to help enterprises and industries upgrade their business performance, lower operating costs, increase productivity and enhance competitiveness. 

The Council is a trusted partner with comprehensive innovative solutions for Hong Kong industries and enterprises, enabling them to achieve resources and productivity utilisation, effectiveness and cost reduction, and enhanced competitiveness in both local and international marketplace. It offers SMEs and startups immediate and timely assistance in coping with the ever-changing business environment, accompanying them on their innovation and transformation journey.