TEXTE Environmental Impacts of Exhaust Gas Cleaning Systems for Reduction of SOx on Ships — Analysis of status quo 
Report compiled within the framework of the project ImpEx 
MGO with 1% sulphur content and OL 
system 
Biological parameters (photosynthetic activity, phytoplankton biovolume, chlorophyll a, bacterial 
abundance and productivity, POC, POP and PON) 
5 Stimulating effects were reported for algae and bacteria 
ı Cyanobacteria —- Laboratory experiment (Nodularia spumigena, non-standard species) 
> Biological parameters (photosynthetic activity, phytoplankton biovolume, primary productivity) 
5 EC10 of 8.6% (decreased on photosynthetic activity) 
ı Diatom algae - Laboratory experiment (Melosira cf. arctica, non-standard species) 
Oo Biological parameters (photosynthetic activity, phytoplankton biovolume, primary productivity) 
5 ECı10 of 5.5% (increased on primary productivity) 
» Luminescent bacteria — acute toxicity (Vibrio fischeri, ISO 11348-2) 
Oo ICso of 31-57% with CL discharge water 
5 No observed effects with OL discharge water 
» Algal growth inhibition — acute toxicity (Phaeodactylum tricornutum, ISO 10253) 
Oo ICso of 2-9% with CL discharge water 
5 No observed effects with OL discharge water 
= Dioxin-like activity — Yeast dioxin screen (ISO 19040-1) 
a5 OL discharge water and CL discharge water tested positive 
Mutagenic activity - Ames Assay 
IL discharge water and CL discharge water tested positive 
Legends: OL, open loop EGCS: CL, closed loop EGCS; SPE, solid-phase extraction: HFO, heavy fuel oil; MGO, marine gas oil. 
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