Landfill leachate brings serious threats to public health and the environment due to its complex composition and difficult degradation. With the growing landfill leachate produced, potential pollution would be a big cause for concern. The effects of circulation flow rate and coolant temperature in progressive freeze concentration (PFC) of leachate as a treatment process were investigated in this study. The parameters effecting efficiency such as; biological oxygen demand (BOD), chemical oxygen demand (COD) and turbidity in ice crystals produced were measured. The results showed that the circulation flow rate of 3,400 mL/min and coolant temperature of -11 ºC were optimum for their respective lower values. -Factor affecting this parameter is the ice crystal growth rate. For circulation flow rate of 3,400 mL/min, BOD5, COD and turbidity obtained were 18 mg/L, 96 mg/L and 62 NTU. While for coolant temperature of -11 °C, BOD5, COD and turbidity obtained were 47 mg/L, 124 mg/L and 63 NTU. This new alternative approach in treating leachate using freeze concentration (FC) will be able to offer a solution towards the environmental damages.