... , classification Suitable to 15-300 persons IMO MEPC.159(55) STC series sewage treatment plantApproved by CCS, EC, NK, DNV, classificationSuitable ... )The series products of sewage treatment plant in our factory, STC marine sewage treatment are bases on design and innovation by ... and vessels with crew 13-300 persons and offshore platforms STC 20 marine sewage treatment plant