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+86 512 571 131 82
+86 512 579 075 99
+86 138 626 007 66

Product Name:
SWCM Marine Sewage Treatment Plant

Product Information:

This plant is applicable to treat the sewage, which means human body wastes and the wastes from the toilets on vessels (so called “black water”), to meet the effluent standards of IMO MEPC.159(55) before discharging the effluent to overboard. It is also applicable to treat galley & shower drainage (so called “grey water” on condition that the “grey water” are pretreated and should select a bigger capacity model to match with.

Marine Sewage Treatment Plant belongs to the key devices for prevention of pollution from ships in seas and oceans according to the revised Annex IV of the International Convention of the Prevention of Pollution (MARPOL 73/78). The MEPC.2 (VI) resolution adopted on 3 December 1976 is the present guidelines on implementation of effluent standards and performance tests for Sewage Treatment Plant, which is called “old standards”. This device is designed and manufactured according to the MEPC.159 (55) resolution enacted on 13 October 2006, which is called “new standards”. The convention (MARPOL 73/78) requires that all sewage treatment plants installed on board on or after 1 January 2010 must meet the MEPC.159 (55) resolution.

Summary of all the rules and effluent standards as followings:

RequirementsIMO Old standardIMO New standardUSCGAlaska
TSS (mg/l)503515030
BOD5 (mg/l)5025NR30
COD (mg/l)NR125NRNR
coli form (per 100ml)25010020020
Residual chlorine(mg/l)As less as possible<0.5NR10
Duration of type
approval test (days)

Please send email to for technical information of the machine.

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