Multiflo高速澄清池运行优化

Operation Optimization of Multiflo Clarifier

某自来水厂为优化低温低浊下Multiflo高速澄清池的运行情况,探索了不同原水条件下,Multiflo高速澄清池的最佳药剂投加量。结果表明,聚合氯化铝(PAC)对出水浑浊度的影响更加明显,相同聚丙烯酰胺(PAM)投加量下,当PAC从2.0 mg/L提高至4.0 mg/L,浑浊度可降低50%~60%。PAM对上清液浑浊度的影响相对较小,搅拌试验中,当PAM投加量为0.18~0.25 mg/L时,上清液浑浊度持续下降,但低温低浊时,过量投加PAM,浑浊度可能会上升。在生产性试验中,PAM投加量的调整未对澄清池出水浑浊度产生明显的不利影响。综合考虑出水效果和经济成本,实际生产中建议适当降低PAM投加量。

In order to optimize the operatation of Multiflo clarification under low temperature and low turbidity, the waterworks explored the optimal dosage of chemicals in the Multiflo clarifier under different raw water conditions. Results showed that the effect of poly aluminium chloride(PAC) on effluent turbidity was more obvious. Under the same dosage of polyacrylic amide(PAM), when PAC increased from 2.0 mg/L to 4.0 mg/L, turbidity could be reduced by 50%~60%. Effect of PAM on the turbidity of supernatant was relatively small. In the stirring test, when the dosage rate of PAM was 0.18~0.25 mg/L, the turbidity of supernatant continued to decrease. But when temperature and turbidity was low, turbidity may increase if PAM was added excessively. In the production test, adjustment of PAM dosage had no obvious adverse effect on the effluent turbidity of clarifier. Considering effluent effect and economic cost, it is suggested to reduce the dosage of PAM properly.