25 persons IMO Standard Ship/Domestic Sewage Treatment Plant

1. Description

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

Marine Sewage Treatment Plant belongs to the key devices for prevention of pollution form 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 STP, which is called "old standards". This device is according to the MEPC. 159(55) resolution enacted on 13 October 2006, which is called "new standards". The convention (MARPOL 73/78) provides that all STPs installed on board on or after 1 January 2010 should meet the MEPC. 159(55) resolution.

2. Main parameters

(1) Usage: It is used for treating teh sewage on board, shipyard or dock

(2) international standard:
IMO resolution MEPC159(55),
Annex IV of (MARPOL 73/78),
MEPC. 2(VI)

(3) discharge standard: TSS ≤ 35mg/L, BOD5 ≤ 25mg/L, COD ≤ 125mg/L, Coliform ≤ 100PC/100ml, pH: 6~8.5

(4)Electricity: AC380V. 50Hz, 3Φ AC440V, 60Hz, 3Φ (the electricity can be changed in according to your requirment )

(5)Capacity: From 15 persons to 440 persons

(6)Certificate: EC, CCS

3. The difference for the IMO old standard and IMO new standard

IMO Old standard
IMONew standardUSCGAlaska
TSS (mg/l)503515030
BOD5 (mg/l)5025NR30
COD (mg/l)NR125NRNR
Coliform (per 100ml)25010020020
pH6~96~8.5NR6~9
Residual chlorine (mg/l)NR<0.5NR10
Duration of type approval test (days)10101030

Pictures of Sewage Treatment Plant: