Study on polyaluminium ferric chloride prepared with red mud for reactive black KN-B dye wastewater treatment

In this paper,the waste water in the kaolin and the reactive black KN-B dye was used as the processing object respectively.Flocculation experiment of polyaluminium ferric chloride(PAFC) prepared with red mud was compared with that of polyaluminium chloride(PAC).Influence factors of flocculation were discussed such as coagulant dosage,the waste water pH value,the waste water concentrate,the waste water temperature,alkalinity.The experiment results indicated that the effects of the factors on flocculation are obvious except from temperature.In processing the kaolin waste water,removal rate of turbidity is 93% by PAC,and that of turbidity is 96% by PAFC.In processing dye waste water,removal rate of dye is 90% by PAC,and that of dye is 99% by PAFC of the alkalinity of 65%-90%.The processing effect of PAFC is superior to that of PAC obviously.The developing speed of PAFC coagulant body is quicker than that of PAC in the experimental process.Dosage of PAFC is less that of PAC.