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首页> 外文OA文献 >Coagulation/flocculation/flotation/nanofiltration processes using Moringa Oleifera as coagulant of Eutrophized river
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Coagulation/flocculation/flotation/nanofiltration processes using Moringa Oleifera as coagulant of Eutrophized river

机译：以辣木作为富营养化河的混凝剂的混凝/絮凝/浮选/纳滤工艺

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摘要

This study investigated the efficiency of Moringa oleifera (MO) seeds as natural coagulant incoagulation/flocculation/dissolved air flotation (C/F/DAF), followed by nanofiltration (NF) for Microcystisprotocystis and microcystin-LR removal. The methodology adopted in this work was performed in two steps: 1)coagulation/flocculation/dissolved air flotation (C/F/DAF) process using the MO extracted in saline solution ofpotassium chloride (KCl-1M) and sodium chloride (NaCl-1M) in optimum dosage 50 mg·L-1; 2) nanofiltrationprocess using NF90 and NF270 membrane provided Dow Chemical Company®. A working pressure of 8 barwas applied. In all samples were analyzed color, turbidity, pH, cyanobacterial cells count and microcystinconcentration. The use of MO seeds as natural coagulant, obtained satisfactory results in the M. protocystis,color and turbidity removal. NF was able to completely remove cyanobacterial cells and microcystins (100 %)from M. protocystis (always under the quantification limit). Therefore, C/F/DAF+NF sequence is a safe barrier against M. protocystis and microcystins in drinking water.
机译：这项研究调查了辣木（MO）种子作为自然凝结剂的混凝/絮凝/溶解气浮（C / F / DAF）效率，然后进行纳滤（NF）去除微囊藻和微囊藻毒素-LR的效率。这项工作采用的方法分两个步骤进行：1）使用氯化钾（KCl-1M）和氯化钠（NaCl-1M）的盐溶液中提取的MO进行混凝/絮凝/溶解气浮（C / F / DAF）工艺）最佳剂量50 mg·L-1； 2）使用dow ChemicalCompany®提供的NF90和NF270膜进行纳滤。施加8巴的工作压力。在所有样品中分析了颜色，浊度，pH，蓝细菌细胞计数和微囊藻毒素浓度。使用MO种子作为天然混凝剂，在原孢分枝杆菌，去除颜色和混浊方面获得令人满意的结果。 NF能够从原胞分枝杆菌中完全去除蓝藻细胞和微囊藻毒素（100％）（始终在定量限内）。因此，C / F / DAF + NF序列是针对饮用水中原胞分枝杆菌和微囊藻毒素的安全屏障。

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