Sewage on board ships
Sewage originating from toilet and hospital facilities and gray water from douches, sinks, laundry and galley cause severe damage to the marine environment. Organic pollutants and nutrients can disequilibrate the local ecosystems at the discharge point and thus endanger the aquatic flora and fauna.
In order to prevent this, the International Convention for the Prevention of Pollution from Ships, MARPOL 73/78 Annex IV, allows the discharge of untreated sewage only under certain conditions after treatment in a type approved sewage treatment plant (STP) meeting the effluent standards under test conditions adopted by the Marine Environment Protection Committee by resolution MEPC.227(64). If ships do not comply with these regulations they can face heavy fines and penalties by local authorities.
RWO’s sewage treatment on board ships
RWO Clean Sewage Systems are based on biological treatment processes, ensuring a minimum of chemical consumption and byproducts.
RWO recommendation for STP onboard ships are as follows: