... .Comply with IMO(MEPC.159(55)) SBH Ship Sewage treatment plant Specifications ModelItemSBH-15SBH-25SBH-40SBH-65Number of persons persons/day15254065Average ... internal pressure 0.025Mpa.c. This plant operates satisfactorily with fresh, brackish, or sea water. However, it has to be used ... sudden change of the type of water, for example, from sea water to fresh water, in the tank, since this affacts ...