Marine Sewage Treatment Plant

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Marine Sewage Treatment Plant
Posting date : May 27, 2010
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Free Member Scince Mar 25, 2010
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89-
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Marine Sewage Treatment Plant belongs to the key devices for prevention of pollution from ship in seas and oceans according to the revised Annex IV of the International Convention of the Prevention of Pollution (MARPOL 73/78).The resolution MEPC.2 (VI) 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 resolution MEPC.159(55) 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 resolution MEPC 159(55).The different effluent standards and days for type test in some organizations are as follows:  Discharge standard              Convention IMO Old standard IMO New standard USCG Alaska TSS (mg/l) 50 35 150 30 BOD5 (mg/l) 50 25 No NR request 30 COD (mg/l) No NR request 125 No NR request No NR Coli form (pcs/100ml) 250 100 200 20 PH 6~9 6~8.5 No NR request 10 Chlorine (mg/l) NR(as low as possible)  0.5 No NR request 10 Test days 10 16 10 30

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