Andritz working on 3-in-1 scrubber solution

Technology could be used in non-marine applications as well, company said

Scrubber manufacturer Andritz has signed a contract with a French ferry operator to test an integrated NOx removal method on the basis of catalytic filter bags and urea injection on one of its vessels.

This system would enable La Méridionale to have a single, fully integrated exhaust gas cleaning system for removal of SOx, particulate matter and also NOx, – a combination that would currently require three separate systems to be installed onboard any vessel, the company said.

Even though the boundary conditions for this installation are very challenging and will push the technology to its limits, the Andritz engineers are confident that this promising development project will yield a highly satisfying result, the company said. Aside from this maritime application, the potential use of catalytic filter bags can also be a very attractive alternative for land-based plants, the company said.

Scrubber manufacturer Andritz has received an order from French ferry operator La Méridionale for the full retrofit of a SeaSOx filtration system on the ro-ro ferry Piana.

A pilot system was first installed in 2019 on the Piana, treating exhaust from one of its four main engines.

Full retrofit of the vessel with a Dual SeaSOxfiltration system includes cleaning of the exhaust from three additional main and two auxiliary engines, covering a total propulsion load of more than 40 MW. This project represents a new milestone in terms of exhaust gas cleaning without requiring any wash water, the company said.

Along with removal of SOx and particulates of all sizes (PM10, PM2.5, PM1), the system requires just 1/10 of the power consumption when compared to a closed-loop scrubber system, it works without water recirculation and discharge, the company said.

The Andritz SeaSOx filtration technology is based on the injection of sodium-based sorbent for SOx absorption. It then uses a baghouse filter installed downstream of the injection point to remove particulate matter and sodium sulphate.

Subscribe to our FREE newsletter

A first contract was successfully completed in March 2019 and included the cleaning of exhaust gases from one main engine and one auxiliary engine. After the commissioning of the first stage in June 2019, Andritz received the IAPP certificate from the French Flag administration, which attests that all statutory requirements for this installation have been fulfilled. Additionally, classification society DNV issued the MED-G certificate, confirming that the safety and environmental compliance requirements have been satisfied. The new filtration system will be installed in November 2021, with expected sea trials in February 2022. Piana operates in the Mediterranean between Marseille and Corsica.


Receive the information you need when you need it through our world-leading magazines, newsletters and daily briefings.

Sign up


The trusted reference and buyer’s guide for 83 years

The original “desktop search engine,” guiding nearly 10,000 users in more than 90 countries it is the primary reference for specifications and details on all the components that go into engine systems.

Visit Now

Becky Schultz Vice President of Content Tel: +1 480 408 9774 E-mail: [email protected]
Julian Buckley Editor Tel: +44 (0) 1892 784088 E-mail: [email protected]
Chad Elmore Managing Editor Tel: +1 262 754 4114 E-mail: [email protected]
Josh Kunz Power Progress Brand Manager Tel: +1 414 379 2672 E-mail: [email protected]
Roberta Prandi Power Progress International Brand Manager Tel: +39 334 6538183 E-mail: [email protected]