RT journal article
T1 Semicontinuous and batch ozonation combined with peroxymonosulfate for inactivation of microalgae in ballast water.
A1 Rivas Zaballos, Ignacio
A1 Romero Martínez, Leonardo
A1 Ibáñez López, María Eugenia
A1 García Morales, José Luis
A1 Acevedo Merino, Asunción
A1 Nebot Sanz, Enrique
A2 Tecnologías del Medio Ambiente
K1 Ballast water
K1 Ozone
K1 Potassium peroxymonosulfate
K1 Growth modeling
K1 Advanced oxidation
K1 Tetraselmis suecica
AB The Ballast Water Management Convention (BWMC) establishes limits regarding the permissible number of viable organisms in discharged ballast water. Ozone as a ballast water treatment is interesting because it can be generated in-situ and has strong oxidant power. Additionally, some oxidants can be formed in reaction with seawater, especially brominated compounds, that assist in inactivating microorganisms. The objective of this study is to assess the efficacy of semicontinuous and batch ozonation as well as their combination with peroxymonosulfate salt (PMS) as methods to be used to ensure compliance with regulation D2 of the BWMC using Tetraselmis suecica as a standard microorganism. Growth modeling method was employed to determine the inactivation achieved by the treatments. The results show that ozone is an effective treatment for accomplishing the D2 of the BWMC. Batch ozonation is more efficient than semicontinuous ozonation probably because of the brominated compounds formed during the ozone saturation of the water. The oxidants that are developed during the ozonation of seawater prolong the residual effect of the treatment throughout the days of storage with practically no presence of them in the ballast tanks at 72 h. The addition of the PMS increases the inactivation in the semicontinuous ozonation, but a threshold concentration of ozone is needed to observe the synergistic effect of both oxidants. No increase is associated with the combination of O3 and PMS in the case of batch ozonation.
PB ELSEVIER
SN 1879-1026
YR 2022
FD 2022-11
LK http://hdl.handle.net/10498/27456
UL http://hdl.handle.net/10498/27456
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 08-nov-2026