- This topic has 1 reply, 2 voices, and was last updated 9 months, 1 week ago by
.
-
Posts
-
Q: What are the standards for Sewage Treatment Plants?
A: Sewage treatment plant installed prior to 01 January 2010 shall comply with resolution MEPC.2(VI); or
ii. sewage treatment plant installed on or after 01 January 2010 but prior to 01 January 2016 shall comply with resolution MEPC.159(55); or
iii. sewage treatment plant installed on or after 01 January 2016 shall comply with resolution MEPC.227(64).Q: What’s the requirements of MEPC.159(55)?
A: The sewage treatment plant was tested and produced an effluent which, on analysis, produces:
(i) a geometric mean of no more than 100 thermotolerant coliforms/100 ml;
(ii) a geometric mean of total suspended solids of 35 mg/l if tested ashore or the maximum total suspended solids not exceeding 35 plus x mg/l for the ambient water used for flushing purposes if tested on board;
(iii) a geometric mean of 5-day Biochemical Oxygen Demand (BOD5) of no more than 25 mg/l;
(iv) a geometric mean of Chemical Oxygen Demand of no more than 125 mg/l;
(v) pH of the effluent is between 6 and 8.5.
The Administration is satisfied that the sewage treatment plant can operate at angles of inclination of 22.5° in any plane from the normal operating position.Q: What’s the requirements of MEPC.227(64)?
A: The sewage treatment plant was tested and produced an effluent which, on analysis, produces:
.1 a geometric mean of no more than 100 thermotolerant coliforms/100 ml;
.2 a geometric mean of total suspended solids of 35 Qi/Qe mg/l if tested ashore or the maximum total suspended solids not exceeding (35 plus x) Qi/Qe mg/l for the ambient water used for flushing purposes if tested on board;
.3 a geometric mean of 5-day biochemical oxygen demand without nitrification (BOD5 without nitrification) of no more than 25 Qi/Qe mg/l;
.4 a geometric mean of chemical oxygen demand (COD) of no more than 125 Qi/Qe mg/l;
.5 pH between 6 and 8.5;
.6 a geometric mean of total nitrogen of no more than 20 Qi/Qe mg/l or at least 70 per cent reduction; and
.7 a geometric mean of total phosphorus of no more than 1.0 Qi/Qe mg/l or at least 80 per cent reduction**.The Administration confirms that the sewage treatment plant can operate at angles of inclination of 22.5° in any plane from the normal operating position.
Source: https://wwwcdn.imo.org/localresources/en/KnowledgeCentre/IndexofIMOResolutions/MEPCDocuments/MEPC.227(64).pdf
Q: Can this approved Sewage Treatment Plant pump treated sewage overboard < 3 Nm to the nearest shore? A: If the nearest shore's Administration allows, then the answer is yes. Always refer to the local regulations, such as USA's No Discharge Zones (NDZ).
- You must be logged in to reply to this topic.