Phosphorus flows on ships: Case study from the Baltic Sea
Artikel i vetenskaplig tidskrift, 2018

Material flow analysis is used to identify and quantify the flow of phosphorus (P) in ship-generated food waste and wastewater.
Passenger, cruise, RoPax and cargo ships in the Baltic Sea were investigated in three scenarios: (1) if all waste is
discharged to sea, (2) if all waste is disposed of ashore or (3) if the food waste fraction is disposed of ashore and wastewater
is treated on-board. About 107 tonnes of P is generated annually in the waste streams, with highest contribution
of approximately 62 tonnes (58%) from wastewater in the ship-category RoPax. Approximately 24 tonnes of P is contained
in the food waste generated by the ships in the study. Forthcoming regulations over allowed nutrient concentrations
in sewage will lead to 80% reduction in P from passenger ships and can reduce about 31 tonnes of P entering the
Baltic Sea environment. If both sewage and grey water instead are offloaded in port reception facilities, about 76 tonnes
of P-reduction to the sea can be reached. As most phosphorus recovery practices currently only are available on land it
is recommended to direct the waste streams to port reception facilities for further treatment ashore.

sewage/wastewater treatment

Baltic Sea

food waste

phosphorus

material flow analysis

Författare

Magda Wilewska-Bien

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

Lena Granhag

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

Jukka-Pekka Jalkanen

Unknown organization

Lasse Johansson

Unknown organization

Karin Andersson

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

Proceedings of the Institution of Mechanical Engineers Part M: Journal of Engineering for the Maritime Environment

1475-0902 (ISSN)

Ämneskategorier

Annan maskinteknik

Teknisk mekanik

Farkostteknik

Drivkrafter

Hållbar utveckling

Styrkeområden

Transport

DOI

10.1177/1475090218761761