Analysis and optimization of coagulation and flocculation process
Analysis and optimization of coagulation and flocculation process
复制标题
混凝絮凝工艺分析与优化
DOI：
10.1007/s13201-014-0262-y
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发表时间：
2017
影响因子：
5.5
通讯作者：
N. V. Srikanth Vuppala
中科院分区：
文献类型：
--
作者：
V. Saritha;N. Srinivas;N. V. Srikanth Vuppala
由于化学混凝剂带来的诸多问题，天然混凝剂成为近十年来众多研究者的研究热点。工艺参数的优化对混凝工艺的效果起着至关重要的作用。以天然混凝剂西米、几丁质为研究对象，对混凝剂的pH、投加量、搅拌速度等参数进行了优化，并与明矾进行了对比。用瓶式试验装置进行混凝。结果表明，明矾和几丁质在混凝剂用量较低（0.1 - 0.3 g/L）时对浊度的去除率均达99%，而西米在混凝剂用量为0.1和0.2 g/L时对浊度的去除率为70 - 100%。西米的最佳条件为6和7，而甲壳素在所有pH范围、较低的混凝剂剂量（0.1-0.3 g/L）和搅拌速度（100转/分快速搅拌10分钟，20转/分慢速搅拌20分钟）下均稳定。由此可以得出结论，西米和几丁质可以用于处理浑浊度季节性变化较大的水。
Natural coagulants have been the focus of research of many investigators through the last decade owing to the problems caused by the chemical coagulants. Optimization of process parameters is vital for the effectiveness of coagulation process. In the present study optimization of parameters like pH, dose of coagulant and mixing speed were studied using natural coagulants sago and chitin in comparison with alum. Jar test apparatus was used to perform the coagulation. The results showed that the removal of turbidity was up to 99 % by both alum and chitin at lower doses of coagulant, i.e., 0.1–0.3 g/L, whereas sago has shown a reduction of 70–100 % at doses of 0.1 and 0.2 g/L. The optimum conditions observed for sago were 6 and 7 whereas chitin was stable at all pH ranges, lower coagulant doses, i.e., 0.1–0.3 g/L and mixing speed—rapid mixing at 100 rpm for 10 min and slow mixing 20 rpm for 20 min. Hence, it can be concluded that sago and chitin can be used for treating water even with large seasonal variation in turbidity.