Superyacht sewage system assessment


Client: Confidential
Service division: Optimisation; Engineering
Sector: Marine


AFECO was commissioned to carry out an independent process evaluation of the sewage system on board a privately owned superyacht to identify the causes of the on-going poor performance. The installed sewage treatment system was designed to meet the effluent standards detailed in the Marine Environment Protection Committee (MEPC) resolution MEPC.2(VI) which was subsequently replaced by resolution MEPC.159(55) but had failed to meet operational standards.

AFECO was commissioned to survey and re-commission the plant to determine whether the system could be optimised to meet consent requirements as well as to assess the systems performance and carry out an evaluation of the design . The system was re-commissioned following an extensive on-board survey which included identifying all possible sources of influent to the system and reviewing the products used for cleaning to ensure they were suitably biologically friendly. The process performance was evaluated using supporting laboratory analysis and the causes of the operational problems identified and detailed in an extensive report.

The work carried out by AFECO included:

  • Plant loading assessment
  • Full system evaluation including tracing of all possible plant inputs and yacht product usage
  • Process performance evaluation including laboratory analysis
  • Identification of process problems
  • Recommendations for system improvement supported by detailed reporting
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