Marine after-treatment
Marine products
Marine SCR
Marine DNOx -370 kW
Marine CCT -370 kW
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Emission Systems
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• 35 - 45 % NOx reduction
• > 90 % reduction of PM, HC and CO
• Suitable for retrofit, even at sea
• No extra additives needed

DNOx® marine for engines up to
370 kW incorporates exhaust gas recirculation (EGR) in combination with CCT® active, a full flow active particulate filter.


The EGR system operates with the patented EGR valve which precicely controls the exhaust and inlet air mixture.

The exhaust concentration is optimized for all individual engine operational conditions.

The CCT active uses the on board fuel
as the reacting agent to control the soot loading of the particulate filter.Fuel sulphur concentration must be < 50 ppm.

© STT Emtec AB, Box 46, 862 02 Njurunda, Sweden    Phone +46 60 64 10 40

Visiting address: Njurundavägen 16, 862 40 Njurunda, Sweden. STT Emtec, engine and emission technology.