Experimental Study on the Pretreatment of High Salinity Mine Water by Lime and Pure Alkali Method Double Alkali Method Coupled Polyaluminum Chloride
Membrane technology has a good desalination effect used by high mineralization mine water,but the precipitation contamination caused by calcium and magnesium ions during operation greatly affects the membrane performance.Pre-treatment to reduce hardness plays an important role in reducing membrane contamination,improving effluent quality and reducing operating costs.The lime and pure alkali method coupled with PAC were selected to remove the hardness and turbidity of mine water,and the effects of chemical dosage,reaction time and precipitation time on the removal effect were investigated using single-factor experiments.The optimum conditions were:the dosage of calcium hydroxide was 100 mg/L,the dosage of sodium carbonate was 10 mg/L,the dosage of PAC was 20 mg/L,the reaction was 30 min,and the precipitation was 15 min.The total hardness content of the water sample at this time was 51.54 mg/L,with a total hardness removal rate of 48.11%and a turbidity removal rate of 98.13%.The cost of the chemical for the ton of water was RMB 3.07.
lime and pure alkali methodpolyaluminum chloride PAChigh mineralization mine waterpre-treatment
NETL
NSTL
万方数据
维普
