Influence of Operating Parameters on Turbidity Removal by Coagulation with Moringa Oleifera Seeds
Influence of Operating Parameters on Turbidity Removal by Coagulation with Moringa Oleifera Seeds
复制标题
操作参数对辣木籽混凝除浊的影响
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
K. Narasiah
中科院分区：
文献类型：
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作者：
A. Ndabigengesere;K. Narasiah
用辣木种子作为天然混凝剂处理模型浑浊水，并在实验室条件下使用罐式测试设备详细观察混凝、絮凝和沉淀等各种现象。研究了试验水的pH、温度、阳离子浓度和阴离子浓度的影响。还研究了快速混合以及慢速混合的强度和持续时间对去除浊度的影响。实验以干燥无壳辣木种子的 5%（重量/体积）粗水提取物的最佳剂量进行。结果发现，pH、阳离子浓度、阴离子浓度和快速混合的变化对辣木种子的凝固活性没有显着影响，而温度和缓慢混合则对辣木种子的凝固活性产生显着影响。较低的温度增加了残余浊度，并且在缓慢混合的情况下，发现最佳强度和持续时间分别为 40 RPM 和 40 分钟，这对应于等于 25 sec−1 ...的速度梯度 G ...
A model turbid water was treated with Moringa oleifera seeds as a natural coagulant and various phenomena like coagulation - flocculation and sedimentation were observed in detail using jar-test equipment under laboratory conditions. Influence of pH, temperature, cation concentration and anion concentration of test water was studied. Also investigated was the effect of intensity and duration of rapid mixing as well as slow mixing on turbidity removal. Experiments were conducted at optimum dosage of a crude 5% (wt/v) water extract of dry non-shelled Moringa oleifera seeds. It was found that variation of pH, cation concentration, anion concentration, and rapid mixing did not significantly affect the coagulation activity of Moringa oleifera seeds, while temperature and slow mixing did. Lower temperatures increased the residual turbidity, and in case of slow mixing, an optimal intensity and duration of 40 RPM and 40 minutes respectively were found, which corresponds to a velocity gradient G equal to 25 sec−1 ...