Wastewater treatment technology
From a wastewater treatment system perspective, there are a range of options available for managing wastewater, depending on the size of the vessel and manner in which it is used. For superyachts, these options require the vessel to have an onboard sewage treatment plant suitable for treating black or black and grey water. The standards to which treatment is required depends on the date that the treatment system was installed, with the latest resolution (MEPC.227(64)) applying to all treatment systems installed after 1 January 2016.
Under the MEPC resolutions, is it a requirement to have a sewage treatment system onboard that is Type Approved by Lloyds Register and it must be installed, operated and maintained in accordance with the manufacturer’s specifications. However, compliance with the regulations is the duty of the vessel and ultimately the onboard Engineers, and this is not well policed. The onus, therefore, is on the shipyards to ensure they have selected the right sewage treatment system for the vessel’s needs and on the Engineers to ensure that this system performs within the consent limits under normal operation.