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Micro-pore Ceramic Filter and UV System as Ballast Water Treatment: Preliminary Study on Chlorella Removal and Bacteria Inactivation

Abstract A combination system of micro-pore ceramic filtration and UV radiation was built up for ballast water treatment. Two treatment methods, single micro-pore ceramic filtration and micro-pore filtration and UV radiation, were studied in the research, respectively. Chlorella removal rates and total oceanic bacteria inactivation rates were measured at different flow rates (0.6 ~ 4.7 m3·h-1) and different initial Chlorella concentrations (0.4 × 104 ~1.4 × 104 cells·mL-1). In this study, Chlorella removal rate was up to 92% by the single filtration while the rate by the combination one could reach 97%. Moreover, the combination one is superior to the single one at almost all the conditions. For total oceanic bacteria, single filtration displayed no obvious inactivation ability while the combination one showed up to 99% inactivation rate.