Markus Joswig News Today

The GESAMP Working Group 43 - a group of independent scientific experts, has recently completed a co...

© lancesagar/AdobeStock The IMO’s MARPOL Annex IV is being revised to confirm the lifetime performance of Sewage Treatment Plants (STPs). This may finally bring about grey water regulation – a necessity that is long overdue. Black Water and Grey Water A ship’s sewage (black water) is collected from toilets, urinals and hospitals. The IMO’s MARPOL Annex IV prohibits its discharge, except when treated by an STP or discharged at > 12nm from the nearest land. A ship’s grey water, collect...