Degradation of Chemical Biocides with Application to Ballast Water Treatment

摘要

Biocide treatment of ballast tanks has been proposed as one possible method for reducing the number of nonindigenous species released into the Laurentian Great Lakes. One of the more widely cited drawbacks of biocide use is the potential for environmental effects to native organisms when the biocide is released into receiving waters. This report describes results from studies evaluating the degradation rates of three different biocides that could be used for treating the ballast water of transoceanic NOBOB (no ballast on board) vessels that trade on the Great Lakes. The three biocides tested were glutaraldehyde, Disinfekt 1000 (a glutaraldehyde surfactant adjuvant mixture), and sodium hypochlorite (NaOCl). The data were collected as part of a larger study examining the efficacy of utilizing these biocides for ballast water treatment.