Comparative assessment of four ballast water compliance monitoring devices with natural UV-treated water using IMO's monitoring approaches
Year: 2024
Type: article
Abstract: Compliance Monitoring Devices (CMDs) are instruments indicating if the 10–50 μm organism abundance in ballast water complies with the International Maritime Organizations' discharge standard. For that, they trade the presumed accuracy of detailed methods for speed and simplicity. In an experiment using UV-treated water, four CMDs were compared, using a Cohen's kappa analysis (ISO 3725), with two detailed methods: Fluorescence Microscopy (FM) and the Most Probable Number (MPN). Of two CMDs, BallastWISE and B-QUA ATP, the standard (non)-compliance limits were adapted. Correlated to FM (non)-compliance results, ranking resulted in: 1) BallastWISE, 2) MPN, 3) Ballast-Check-2 and 4) WALZ-PAM. The ATP method had too few data for this ranking. MPN proved problematic: the abundance of 10–50 μm organism decreased while that <10 μm organisms increased. It is concluded that in case of UV-treatment, the outcome of CMD-validations will depend on the detailed method, the CMD instrument, and the (non)-compliance limits chosen. • Compliance Monitoring Devices (CMDs) allow rapid ballast water analysis. • The performance of four CMDs on UV-treated seawater was tested. • Cohen's kappa analysis ranked the different approaches against the FM approach. • The reliability order was BallastWISE, MPN, Ballast-Check-2 and WALZ-PAM. • An ATP-based CMD gave relevant results after lowering the non-compliance limit 10×.
Source: Marine Pollution Bulletin
Language: English
Subfield: Global and Planetary Change
Field: Environmental Science
Domain: Physical Sciences
SDG: Life below water
Open Access status: hybrid
Estimated APC paid: $3,630
OpenAlex ID: W4404126861