Waste water treatment system for ships Holland Marine Services Amsterdam
MSD-II Series

Operating principle Biological Sewage Treatment system MSD-II
Waste water enters the system at the inlet (1).

The blower (2) provides air and causes the waste water to circulate through the submerged biofilter (4) by means of the airlift (3), a simple but reliable mammoth-pump principle.

The micro-organisms that grow on the surface of the media break down the organic particles in the waste water biologically.

Treated water flows to the disinfection tank (7) via the spillover (6).

The disinfection pump (8a) gives out liquid disinfectant in precisely measured doses so as to eliminate any remaining bacteria and viruses, resulting in high-quality treatment coefficients and effluent suitable to discharge overboard.
Grey water can enter the unit either through the grey water inlet (13) for disinfection only, or through the inlet (1) for biological treatment.

The discharge pump (9) and level switches (10) automatically maintain substance levels in the disinfection tank (7). A limited amount of sludge (11) settles at the bottom of the unit and can be released through air (12) and discharged by the pump (9).

An UV disinfection reactor (8b) can be installed as an alternative to the standard disinfection pump.

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