Environmental impacts of grey water discharge from ships in the Baltic Sea
Artikel i vetenskaplig tidskrift, 2020

Discharge of grey water from ships is today unregulated in most sea areas, including the Baltic Sea. Annually, an estimated 5.5 million m3 grey water is emitted to the Baltic Sea with largest contribution from RoPax (4.25 million m3) and cruise ships (0.65 million m3). In total 44 different contaminants in grey water was identified and sorted into the sub categories organic compounds (28) and metals (16). Zinc and copper had the highest average concentrations with yearly inputs of 2.8 tons (zinc) and 1.5 tons (copper). 159 tons of nitrogen and 26.4 tons of phosphorus were estimated to be discharged to the Baltic Sea annually. An environmental risk assessment of contaminants, performed at a shipping lane in the Baltic Sea, showed the risk for adverse effects from grey water to be low. Nitrogen and phosphorus input from grey water contributes to 0.25% of the exceedance of, for the Baltic Sea set, eutrophication target.

Ships

Eutrophication

Grey water

Baltic Sea

Contaminants

Environmental risk assessment

Författare

Erik Ytreberg

Chalmers, Mekanik och maritima vetenskaper, Maritima studier, Maritim miljövetenskap

Martin Eriksson

Chalmers, Mekanik och maritima vetenskaper, Maritima studier, Maritim miljövetenskap

Ilja Maljutenko

Tallinns tekniska universitet (TalTech)

J. P. Jalkanen

Finnish Meteorological Institute

L. Johansson

Finnish Meteorological Institute

Ida-Maja Hassellöv

Chalmers, Mekanik och maritima vetenskaper, Maritima studier, Maritim miljövetenskap

Lena Granhag

Chalmers, Mekanik och maritima vetenskaper, Maritima studier, Maritim miljövetenskap

Marine Pollution Bulletin

0025-326X (ISSN)

Vol. 152 March 110891

Ämneskategorier

Vattenteknik

Oceanografi, hydrologi, vattenresurser

Miljövetenskap

DOI

10.1016/j.marpolbul.2020.110891

Mer information

Senast uppdaterat

2020-02-12