Annex - 2022 Guidance on Methodologies that May Be Used for Enumerating Viable Organisms for Type Approval of Ballast Water Management Systems
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Statutory Documents - IMO Publications and Documents - Circulars - Ballast Water Management - BWM.2/Circular.61/Rev.1 International Convention For The Control And Management Of Ships' Ballast Water And Sediments, 2004 (24 June 2022) - Annex - 2022 Guidance on Methodologies that May Be Used for Enumerating Viable Organisms for Type Approval of Ballast Water Management Systems

Annex - 2022 Guidance on Methodologies that May Be Used for Enumerating Viable Organisms for Type Approval of Ballast Water Management Systems

Introduction

1 The Marine Environment Protection Committee (MEPC), at its seventieth session, adopted the 2016 Guidelines for approval of ballast water management systems (G8) (resolution MEPC.279(70)), which call for guidance on methodologies for determining the viability of organisms.

2 The purpose of this Guidance is to provide information on methodologies used for enumerating viable organisms during the type approval of ballast water management systems (BWMS), in order to verify that they meet the ballast water performance standard described in regulation D-2 of the BWM Convention.

3 The selection of analytical methodologies used for determining the concentration of viable organisms is critical in providing confidence that a BWMS complies with the ballast water performance standard described in regulation D-2 of the BWM Convention.

4 This Guidance should be read in conjunction with the BWM Convention, the Code for Approval of Ballast Water Management Systems (BWMS Code) (resolution MEPC.300(72)), the Guidelines for ballast water sampling (G2) (resolution MEPC.173(58)), the Guidelines for port State control under the BWM Convention (resolution MEPC.252(67)) and the 2020 Guidance on ballast water sampling and analysis for trial use in accordance with the BWM Convention and Guidelines (G2) (BWM.2/Circ.42/Rev.2, as may be revised).

5 As instructed by MEPC 64, sampling and analysis procedures to be used for enforcement of the BWM Convention should be no more stringent than what is required for type approval of BWMS. In addition, the Administration should take into consideration methodologies identified for compliance assessment within the 2020 Guidance on ballast water sampling and analysis for trial use in accordance with the BWM Convention and Guidelines (G2) (BWM.2/Circ.42/Rev.2, as may be revised).

General principles

6 Sampling and analysis should be consistent with the BWMS Code and undertaken to the satisfaction of the Administration to assess compliance of BWMS with the ballast water performance standard described in regulation D-2 of the BWM Convention.

7 Analytical methodologies should:

  • .1 determine viability by assessing the presence of one or more essential characteristics of life, such as structural integrity, metabolism, reproduction, motility, or response to stimuli;

  • .2 be appropriate to the ballast water treatment technology being tested; and

  • .3 provide assurance that organisms not removed from ballast water have been killed or rendered harmless to the environment, human health, property and resources.

8 The table in this Guidance contains methodologies that may be used to enumerate viable organisms. The Guidance remains open for addition of new methodologies as new or revised methodologies become available.

9 Analytical methodologies should be validated to the satisfaction of the Administration. The methodologies in the table below have been validated to the satisfaction of at least one Administration.

Table: Methodologies that may be used for enumerating viable organisms for type approval of BWMS

Methodologies for enumerating viable organisms Organism size class or indicator Assessed criteria of viability Examples of how the methodologies are applied Applicability to ballast water treatment technologies
FDA/CMFDA + Motility Viable organisms ≥ 10 μm to < 50 μm Membrane integrity, enzyme activity, motility PPR 4/7, appendix 1;

PPR 4/INF.10

Suitable for assessing treatment technologies intended to kill or remove organisms
MPN Dilution Culture + Motility Viable organisms ≥ 10 μm to < 50 μm Reproduction capacity, motility PPR 7/INF.10 Suitable for assessing all treatment technologies

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