Treatment of Effluent Suspended Solids in a Tungsten Mine

This paper studies the treatment of suspended solids in wastewater by coagulation method. Effects of Different coagulant, coagulant dosage, stirring intensity, pH, settling time on the treatment results are studied,resulting the optimized conditions. The research results show that, the treatment process of tailings drainage by Lime+FeCl3 process has the favorable results. The optimum conditions were: waste water pH is adjusted to about 10, FeCl3 the dosage of about 15 mg/L, stirring intensity of 250 r/min rapid mixing 0.5 min, then 50 r/min slow stirring 5 min,settling time of 60 min. Suspended solids removal rate reached 98.4 percent. The supernatant suspended solids content can be reduced to 5.4 mg/L.