According to the characteristics of the iron phosphate wastewater from a new energy enterprise such as high impurity ions content,high ammonia nitrogen and total phosphorus concentrations and so on,a combined process of ammonia precipitation impurity removal-membrane separation-MVR evaporation salt crys-tallization was adopted for resource recovery,ammonium sulfate and monoammonium phosphate in reclaimed wa-ter and wastewater were recycled.The operation results indicated that,through pretreatment,the removal rates of total ions and Mn2+were above 99.5％and 99％respectively,the mass concentration of ammonium sulfate in the membrane concentrated water was above 160 000 mg/L,the quality of the byproduct ammonium sulfate satisfied the type Ⅰ index requirements of GB/T 535-2020 Fertilizer grade ammonium sulphate,the quality of monoam-monium phosphate met the index requirements of traditional top quality goods of powder monoammonium phos-phate in GB/T 10205-2009 Monoammonium phosphate and diammonium phosphate,the net income of ton wastewater recycling treatment was about 9.8 yuan.
关键词
磷酸铁废水/资源化/预处理/膜浓缩/MVR蒸发/硫酸铵/磷酸一铵
Key words
iron phosphate wastewater/recycling/pretreatment/membrane concentration/MVR evaporation/ammonium sulfate/monoammonium phosphate
维普
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