Thalenhorststrasse 15 A
28307 Bremen, Germany
Phone: +49 421 53705 - 0
Fax: +49 421 53705 - 440

Managing Marine Water since 1975

Bilge Water Treatment

RWO's classic

More than 14,000 of RWO's oily water separators are on their way over the seven seas. Separating oil from water is the business we've grown up with - and clearly know how to do it. Choose RWO and you can sleep well!

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Wastewater Treatment

Ensure Safe Water on Board

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Fresh Water & Process Water Treatment

To Enjoy Every Drop


Multi-local presence


  • First orders for CleanSewage Bio, the new sewage treatment plant of RWO

    Two orders for overall 13 systems

    CleanSewage Bio is the new family member of the RWO water treatment family. Three months after the completion date in June 2015 RWO reports a healthy interest in its sewage treatment plant CleanSewage Bio.

  • New sewage treatment plant now available!

    CleanSewage Bio is the new family member of the RWO water treatment family! Launched in July 2015, its space demand in the machine room is one of the smallest on the market - mainly caused by a unique one-side-access, which allows all maintenance works to be done from the front.

    Also the usability has been significantly improved. Without reading any displays or language skills, operators can see at a glance if the system is running or intervention is necessary. Three LEDs working by the internationally understandable traffic light concept do the job excellently.

    More features are an increased simplicity in handling and crew-friendliness. Learn more about CleanSewage here!

  • Technical Update for international Agents

    April 2015: Three days long 13 agents and service technicians from RWO visited headquarters in Bremen to learn all around the new OWS-COM and RWO's biological sewage treatment plant WWT-LC. Our partners from Korea, Italy, Canada and other countries all over the world got deep insights in the technology of oil water separation and were trained in comissioning and troubleshooting on the yards and in various service cases.

    Product Manager Tobias Kaulfuss commented happily on the training: "We are lucky with the good technical knowledge of our international partners and appreciate their commitment. For a German company like RWO it is very important to provide excellent service and help to shipowners and shipyards in every case. This training ensured that we are still one step ahead in the market."

  • Future Day at RWO

    April 2015: RWO shows Girls and Boys how to protect the seven seas and always have clean water on board.

    Joining a national initiative, RWO invited children from 11-15 years to'Future Day' at RWO, introducing them to experience working in the maritime branch and in a technical profession.

    The kids took part in a rallye to find out which way an oily water separator takes through RWO, starting from an interested customer until finally after sales services takes care of the customer. In the afternoon, all attendees could try what it mean to work at a plant and machinery installer, making nameplates from metal and working on a small pocket lamp.

    The team of RWO enjoyed being with the kids and showing them new possibilities for their future life. We look forward to Future Day 2016!

  • New Partner in Croatia

    January 2015: RWO welcomes Croatian engineering company Nautica Sigmarine d.o.o. as our new agent for Croatia!

    Since 1994 Nautica Sigmarine provides project and technical support services in shipping and shipbuilding areas. The company's staff of experienced engineers originate from Croatian shipbuilding industry and have valuable skills in various disciplines related to the marine industry.

  • Relaxing in full sail

    On Thursday, July 10th RWO set sail together with partners and friends of the company. Under full sail we enjoyed fantastic views on the river Elbe, crossing between the famous dry dock "Elbe 17" and cruise ships leaving the port of Hamburg.

RWO now part of the GeMax initiative

The German Maritime Export Initiative goes web and RWO is part of it! The initiative is an association of German maritime suppliers working closely with financing institutions. For "Made in Germany" is still an international value and now even more competitive.

Learn more about Maritime Excellence Made in Germany