Treatment – Black and Gray Water

The Evac range of advanced waste water treatment plants and membrane bioreactor systems includes standard units for smaller installations as well as tailor made units for bigger installations, such as cruise liners. All our systems meet the most stringent effluent regulations, both today and in the future.
We also supply physicochemical waste water treatment plants for applications where space and weight are critical issues.

MBR (Advanced Membrane Bio-Reactor)

The membrane bioreactor series represents advanced black and grey wastewater treatment solutions for all vessels. All Evac MBR units are IMO MARPOL MEPC 227(64) certified and also USCG certified.
The Evac standard MBR is also available as a combined unit with vacuum generation integrated.
The Evac MBR features low power consumption, owing to its low pressure submerged membranes. The quality of effluent is extremely high in all sea conditions and exceeds all current specifications.


  • Available with or without vacuum creation
  • No dilution water required
  • No disinfection required
  • No dechlorination required
  • 10+ years expected lifetime for membranes
  • Low operation costs
  • Simple treatment process
  • Easy to operate
  • No continuous chemical consumption

ORCA III (Physical Chemical Treatment)
The ORCA III is a physicochemical sewage treatment plant, designed for treatment of both black and grey water. The ORCA III fulfills the requirements of IMO MEPC 159(55). It uses proven, very low maintenance technology and its compact footprint makes it ideal for retrofitting to existing vessels as well as for installment on new builds. The plant operates on a continuous basis, is fully automatic in normal operation and requires a low volume of consumables.

The ORCA III physicochemical sewage treatment plant uses two process methods:
1. Physical method; maceration, sedimentation, filtration

2. Chemical method; coagulation, oxidation, disinfection

As the treatment is not based on an activated sludge process, the unit is easy to handle and is almost immediately operational after start-up. The shut-down process is also short and simple.