Ships Discharge 10,000 Cubic Meters of Plastic a Year From Sewage
The GESAMP Working Group 43 - a group of independent scientific experts, has recently completed a co...
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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, collected from showers, wash basins, laundries, and galleys, is not regulated. Grey water has more pollutan...