文摘
A novel hybrid precipitation- NF treatment was applied to wastewater for purification and the potential recovery of H3PO4. Most silicon was precipitated leaving almost 60% of H3PO4 in the effluent wastewater at Ca(OH)2 dosage of 130 g/L. Three types of membranes (NF90, NF270, and BW30) were tested for potential treatment of effluent acidic wastewater. NF90 gave a high rejection, while NF270 showed a reasonable rejection with high flux. NF270 showed a potential selective recovery of H3PO4. NF90 and BW30 have high rejections for almost all species.