The effects of different coagulants on coagulation process for algal removal were investigated with the laboratory scale to obtain data for their influence to drinking water treatment processes. Aluminum sulfate, which is the most commonly used for coagulation process in the world, and two other polymer coagulants, poly aluminum chloride and poly aluminum chloride silicate, were used to check coagulation efficiencies for algae removal. Microcystis aeruginosa, one of cyanobacteria and main species during waterbloom in worldwide, were selected and prepared their cells in each growth phase for coagulation tests. Coagulation inhibitions were shown for cells in log-growth phase as well as stationary phase in which periods algae cells might be most active, especially, when using poly aluminum chloride and poly aluminum chloride silicate. On the other hand, coagulation efficiencies were high with all coagulants for cells in lag phase as well as death phase. As result of the research, although polymer coagulants are generally known as better ones than aluminum sulfate, aluminum sulfate should be used during waterbloom rather than polymer coagulants such as poly aluminum chloride and poly aluminum chloride silicate since the most of algae cells during waterbloom may be in the log-growth phase and/or lag phase.

以实验室规模研究了不同凝结剂对凝结过程中藻类去除的影响，以获取其对饮用水处理过程的影响数据。硫酸铝是世界上最常用于混凝过程的物质，另外两种聚合物混凝剂，聚氯化铝和聚氯化铝硅酸盐，被用于检查除藻的混凝效率。铜绿微囊藻选择了蓝藻和全世界水华时期的主要物种之一，并在每个生长期准备了它们的细胞进行凝血测试。在对数生长期和静止期中，藻类细胞可能最活跃，特别是在使用聚氯化铝和聚氯化铝硅酸盐时，对数生长和静止期的细胞均显示出凝集抑制作用。另一方面，所有凝结剂对于细胞处于滞后期和死亡期的凝结效率都很高。研究结果表明，尽管通常认为聚合物凝结剂比硫酸铝更好，但在水华期间应使用硫酸铝，而不要使用诸如聚氯化铝和聚氯化铝硅酸盐之类的聚合物凝结剂，因为在水华期间大多数藻类细胞可能是在对数增长阶段和/或滞后阶段。