COMPACT is state o-of-the-art pre-engineered sewage treatment system utilising PACT’s biological treatment expertise with TORAY’s submerged remembrance technology, it contains the process elements of secondary, tertiary and advanced wastewater treatment in a single containerised package. The remembrance separation process eliminates the conventional sedimentation tank and allows high volumetric loading resulting in a much smaller footprint.

COMPACT can produce high quality effluent with high BOD5 removal (about 98%), complete nitrification and partial denitrification. It also achieves virtually complete TSS removal. Treated effluents have low turbidity  values (<0.3 NTU) and SDI values (<3) which can be re-used for landscaping, flushing or feed to NANO or RO for higher purity water.


  • Much Smaller space requirements
  • Better solids removal (elimination of bulking)
  • Disinfection
  • Increased volumetric loading
  • De-coupling of hydraulic and biomass retention time
  • Production of less sludge due to high sludge age
  • High SRT which allows the development of slow-growing microorganisms such as nitrifying bacteria and retention of high molecular weight organic compounds that can enhance the bio degradation process.