Improvement on the paiticle sepaiation efficiency through coagulation, sedimentation and filtration which used STI as an index to the treatment

（1）在大多数情况下，只有动荡才被用作水治疗的评估指标。However，对联合和调节治疗的评估应该通过采用吸收时间比率STR （=STI）来完成，其中与当地联合数量有很强的相关性。在我们的研究中，这种方法的可用性得到了验证的实验。2）在传统的水净化方法中，增加了在150秒^<-1>和1分钟的T_R值，它被证明是当STR的减少不充分时，过滤时间不足时，过滤时间不足，当高协同剂量的剂量率被设定为[3]时，大量的泥浆量被协同和调节过程中的水处理量减少，同时按顺序减少涡轮化和水处理的STR（T_R值固定在5分钟），这对提高G_R值是很重要的，用于共同使用的最佳值。当PAC 1被用作协同剂时，G_R值为450年代^<-1>和100 ... More 0 s^<-1>是减少涡轮和STR响应的最佳选择。关于另一方，当PSI-3被使用时，G_R值的650 s^<-1>和1350 s^<-1>找到了最佳值来减少涡轮和对STR的反应。4）快速触发后的以下测量是正确的：微通量的直径、循环速率和零潜力。根据结果，它被确认为微流量的直径已经减少，循环速率已经增加，因此G_R值将得到最佳触发条件。而且，它已经核实了Zeta的潜力，因为它含有大量的协同剂，而且密集的微型絮凝器是形成的。这还表明，微絮凝物的性质的这种变化与治疗的改善密切相关。5）直接沙子和过滤实验已经开始在进行测试时进行，以确定在G_R值和T_R值的条件下，微絮凝物形式的处理能力在很大程度上是可变的。该结果显示了过滤器头部丢失和过滤水的密度在750秒的G_R值和7分钟的T_R值（G_R·T_R值=315，000）中的原始水的STR在快速倾斜后的最低限度内。Less（低）

1)In most cases, only the turbidity has been used as an evaluation index of water treatment. However, the evaluation of the coagulation and sedimentation treatment should be done by adopting the suction time ratio STR (=STI) which has a strong correlation to the residual coagulant quantity. In our research, the usefulness of such method was verified experimentally.2)In the conventional water purification method in which increased coagulant dosing under G_R value of 150 s^<-1> and T_R value of 1min was made, it was demonstrated that when the STR reduction was insufficient, the shortening of filtration time occurred, and the much volume of sludge arose when the high coagulant dosing rate was set.3)In order to reduce both the turbidity and the STR of water treated by the coagulation and sedimentation processes (T_R value is fixed at 5min), it is important to raise G_R values at the optimum value for the coagulant used. When the PAC1 is used as a coagulant, G_R values of 450 s^<-1> and 100 … More 0 s^<-1> were optimum for the reduction of turbidity and STR respectively. On the other hand, When the PSI-3 is used, G_R values of 650 s^<-1> and 1350 s^<-1> were found to be optimum for reducing the turbidity and the STR respectively.4)The following were measured right after the rapid stirring : diameter, circular rate and zeta-potential of the micro flock. As the result, it was confirmed that the diameter of micro flock was decreased and the circular rate was increased, as the G_R value approaches the optimum stirring condition. And, it was verified that the zeta-potential of the micro flock containing much coagulant, and the dense micro flock was formed. It was also shown that such change of the property of micro flock was strongly related to the treatment improvement.5)The direct sand filtration experiments were carried out in order to examine the treatability of the micro flock formed in the conditions in which G_R values and T_R values widely were varied. The results have indicated that the best filtration results on both the filter head loss and the filtered water turbidity were obtained in G_R value of 750 s^<-1> and T_R value of 7min (G_R・T_R value=315,000) where the STR of the raw water right after the rapid stirring became minimum. Less