RWO participated the first time during the world largest marine trade fair Shipbuilding, Machinery and Marine Technology (SMM) in Hamburg.

To support the growth of the company a new facility opens at Am Dammacker 12, Bremen.

By 1990 the third-generation separators, the oily water separator (OWS)
SKIT-aquaclean S is launched and gets first installed on the Hapag-Lloyd vessel MS Berlin Express.

RWO Maschinenfabrik GmbH – Abwassertechnik is taken over by Berkefeld-Filter Anlagenbau GmbH,
headquartered in Celle and becomes part of SIHI-Group.

Relocation of offices and production to Bremen-Huchting, Leerkämpe 3, Bremen.

First installation of a membrane based MEMROD advanced wastewater treatment (AWT) plant on-board the sailing ship Gorch Fock. 

With 6000 sold oily water separators RWO GmbH remains one of the market leaders in the industry. 

Launch of the biological sewage treatment system – WWT, designed and approved according MEPC.2(VI)2.7.

Start for the development on ballast water treatment technology.

Berkefeld is taken over by Veolia Water Solutions & Technologies.
RWO joins Veolia group. 

Launch of the new OWS SKIT/S-DEB during SMM 2004. 

New bilge water rules MEPC 107(49) get into effect. RWOs SKIT/S-DEB is the front– runner in the market.

Inauguration of the RWO facility Thalenhorststraße 15a, Bremen.

The OWS SKIT/S-DEB receives USCG approval. RWO celebrates the OWS #10,000.

The German flag state administration BSH issues the IMO type approval for the CleanBallast water treatment system.

RWO sells the OWS #14,000.  During SMM 2014 the OWS-COM is launched.

With the launch of CS-BIO, RWO sets standards
for compact design in biological sewage treatment.

New facilities in Gerold-Janssen-Str. 2, Bremen and the new
training and test facility in Rethem open their doors.

RWO joins the ERMA FIRST Group.