Comparative Study on the Coagulation Performance of Several Inorganic Coagulants
The coagulation performance of three coagulants,including FS(Ferric sulfate),AC(Aluminium chloride),and PAC(Polyaluminum chloride),is studied with campus lake water as the raw water.It is shown that the turbidity removal rate of all three coagulants gradually increases with the increase of dosage of coagulants,and the highest removal rate are 95.1％,87.1％,and 90.5％for FS,AC,and PAC,respectively.Within the range of temperature 25 ℃～55 ℃,the turbidity removal rate of coagulants changes unconspicuously.The turbidity removal rate of AC remains a high level,while that of FS and PAC increases and then decreases a little.The turbidity removal rate of AC is higher in the alkaline condition than in the acidic and neutral conditions.The turbidity removal rate of SF increases with the increasing of pH,and PAC shows the highest turbidity removal rate in neutral condition.Good coagulation effect can be achieved under normal temperature and neutral conditions for the three coagulants.When kaolin and bentonite are used as coagulation objects,the removal rate of PAC and FS can basically reach over 90％,both of which have good performance.
万方数据
维普
