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

The No. 1 provider for all matters in water and wastewater treatment - over 15,000 references

Ballast Water Treatment

Simple, Safe, Efficient and Reliable

CleanBallast - the simple way to fulfil IMO's Convention on Ballast Water Treatment. More than 40 successfully commissioned plants and highly satisfied customers prove reliability, simplicity and a highly developed CleanBallast technology.

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Wastewater Treatment

Sewage Treatment and Oily Water Separation

Ensure Safe Water on Board

Fresh Water & Process Water Treatment

To Enjoy Every Drop


Multi-local presence


  • September 09-12, 2014

    SMM, Hamburg

    Meet us in Hamburg at booth A1.218! We are looking forward to seeing you at SMM 2014.

    SMM is the leading international forum of the maritime industry. Every two years, the representatives of the shipbuilding and marine equipment industries from all parts of the world meet in Hamburg, present innovations and forward looking technologies, and set the course for future success of the industry.

  • June 02 - 06, 2014

    Posidonia, Athens

    Meet us in Athens at booth 4.109! We are looking forward to seeing you at Posidonia 2014.

    Posidonia is a global marketplace for ship builders, suppliers of ships' equipment and shipping-related services.

  • April 9-11, 2014

    Sea Japan, Tokyo

    Meet us in Tokyo! We are looking forward to seeing you at our booth GER-01 at the German Pavilion.

    Sea Japan is the biggest event of the Japanese maritime industry calendar. Shipbuilders, shipowners, marine equipment suppliers and providers of financial, technical and operational services gather at Sea Japan to exchange information and do business.


  • 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.

  • New Ballast Water Guide available

    The current situation in terms of ballast water still gives headaches to all people in the maritime branch. Since a timeline in terms of regulations is kind of unpredictable, shipowners and yards are struggling with a decision.

    To provide some orientation in the market and outline the pro's and con's of the meanwhile several systems, RWO offers the new Shipinsight Ballastwater guide as a free download.

  • New agent in Japan

    RWO welcomes Japanese engineering company N.Y. Co. as our new agent for Japan!

    The company was founded 1976 by Mr. Noriyoshi Yoshikawa, and has always had a strong technical background. Shinya Yoshikawa, today's president of N.Y. Co. leads the company with excellent knowledge, aiming towards high satisfaction of our customers.

  • Lloyd's Register's Design Appraisal for CleanBallast

    November 2013: Again RWO's CleanBallast system has proven its reliability and technical refinement in an assessment proceeded by Lloyd's Register. As a result of wide-ranging tests and research CleanBallast has now received LR's Design Appraisal document.

    RWO's CleanBallast system is one of the very few ballast water treatment technologies that can withstand the uncertainties of the future and has operational experience.

    To date CleanBallast has been already selected by customers from countries all over the world like China, Cyprus, France, Germany, Hong Kong, Japan, Korea and the Netherlands for bulker, container, heavy lift, multi purpose and tanker vessels.

  • Russian River Register certifies RWO's oily water separator

    RWO's oily water separator SKIT-S DEB has gained approval from Russian River Register RRR and therewith adds another inportant certification to a long row of successes for RWO's classic.

    More than 14,000 ships have already been equipped with RWO's oily water separators since RWO started its business in 1975. As its predecessors the SKIT/S-DEB type uses a combination of highly effective open porous coalescer with automatic backfl ushing, together with a second stage emulsion breaking oil and hydrocarbon polisher.
    The periodical backfl ushing keeps the coalescer surface clean and offers long lasting operation without attendance and lowest maintenance, according to IMO Resolution MEPC.107(49).
    The excellent and long experience with the RWO coalescing type oily water separator guarantees a high performance standard.

AMS certificate granted to CleanBallast

The United States Coast Guard has granted the Alternate Management System (AMS) certificate to CleanBallast.

CleanBallast has been awarded one of the most important certificates of the global market for ballast water treatment. The AMS certificate represents a first step towards the full USCG-approval to be achieved by RWO as one of the first companies.

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