Department of Environmental Engineering, Dong-A University, Busan 49315, Korea.
Department of Community and Environmental Resource Planning, University of the Philippines, Los Baños 4031, Philippines.
Int J Environ Res Public Health. 2022 Feb 6;19(3):1835. doi: 10.3390/ijerph19031835.
The present work investigated the treatment of ballast water via electrochemical disinfection using a RuO-TiO/Ti electrode. Batch tests were conducted with simulated ballast water containing as an indicator organism. The effect of varying NaCl concentrations (1%, 2%, and 3%; ) and current densities (0.3, 1.0, 2.0, and 3.0 mA/cm) on the inactivation of was examined. Results showed higher disinfection efficiency of was obtained at higher NaCl concentration and current density. Complete inactivation of was attained within 2 and 1 min at 0.3 and 1 mA/cm, respectively, under 3% NaCl concentration. Meanwhile, complete disinfection at 1 and 2% NaCl concentrations was observed in 6 and 2 min, respectively, using a current density of 0.3 mA/cm. The 100% inactivation of was achieved with an energy consumption in the range of 2.8 to 2.9 Wh/m under the NaCl concentrations at 1 mA/cm and 1 min of electrolysis time. The complete disinfection attained within 1 min meets the D-2 standard (<250 CFU /100 mL) of ballast water under the International Maritime Organization. The values of energy consumption of the present work are lower than previous reports on the inactivation of from simulated ballast water.
本工作研究了使用 RuO-TiO/Ti 电极通过电化学消毒处理压载水。采用 作为指示生物，进行了含有模拟压载水的批量试验。考察了不同 NaCl 浓度（1%、2%和 3%； ）和电流密度（0.3、1.0、2.0 和 3.0 mA/cm）对 灭活的影响。结果表明，在较高的 NaCl 浓度和电流密度下，获得了更高的消毒效率。在 3%NaCl 浓度下，分别在 0.3 和 1 mA/cm 下，2 和 1 min 内即可完全灭活 。同时，在 1%和 2%NaCl 浓度下，使用 0.3 mA/cm 的电流密度分别在 6 和 2 min 内实现完全消毒。在 1 mA/cm 和 1 min 的电解时间下，NaCl 浓度为 2.8 至 2.9 Wh/m 时，即可达到 100%的灭活率。在 1 min 内完全消毒可满足国际海事组织规定的压载水 D-2 标准（<250 CFU /100 mL）。本工作的能耗值低于先前关于模拟压载水中 灭活的报告。
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