Department of Food Chemistry, Research Institute of Food Science and Technology (RIFST), Mashhad, Iran.
J Environ Manage. 2019 Oct 15;248:109262. doi: 10.1016/j.jenvman.2019.109262. Epub 2019 Jul 19.
In the present study, the technique of electrocoagulation (EC) followed by filtration was explored at the laboratory scale for the removal of organic compounds from olive debittering wastewater (ODW). Different parameters such as electrode type and distance as well as sample pH, current density, and electrolysis time were investigated in batch experiments with identical electrode geometries. Our results showed that highest pollutant removal efficiency and lowest operational cost were achieved using two Al electrodes at a distance of 1 cm apart with a sample pH of 4.0. Moreover, rises in the electrolysis time and current density (up to 60 min and 15 mA cm, respectively) led to improvements in the removal of chemical oxygen demand (COD), total polyphenolic compounds (TPC), and turbidity. Under optimized conditions, the removal of COD, TPC and turbidity reached 78.51, 90.44 and 97.92%, respectively; the values of 1.01 g m, 12.0 kWh cm and 0.12 USD m were calculated as the electrode consumption, electrical energy consumption and operating cost, respectively. Chromatography results revealed tyrosol and catechin as the main phenolic compounds present in both the initial effluent and the generated sludge.
在本研究中，探索了电凝聚（EC）技术随后进行过滤，用于从橄榄脱苦废水中（ODW）去除有机化合物。在具有相同电极几何形状的分批实验中，研究了不同的参数，如电极类型和距离以及样品 pH 值、电流密度和电解时间。我们的结果表明，使用两个相距 1cm 的 Al 电极，样品 pH 值为 4.0 时，污染物去除效率最高，运行成本最低。此外，随着电解时间和电流密度（分别提高至 60 分钟和 15mA/cm）的增加，化学需氧量（COD）、总多酚化合物（TPC）和浊度的去除率也有所提高。在优化条件下，COD、TPC 和浊度的去除率分别达到 78.51%、90.44%和 97.92%；电极消耗、电能消耗和操作成本分别计算为 1.01g/m、12.0kWh/cm 和 0.12 美元/m。色谱结果表明，酪氨酸和儿茶素是初始流出物和生成的污泥中存在的主要酚类化合物。
