某磷胺废水呈酸性(pH2~3),含氟化物60mg/L,总磷40mg/L,氨氮约40mg/L,SS约130mg/L,综合处理后的出水要求为氟化物<10mg/L,总磷<0.5mg/L。设计针对该废水特性,先采用石灰水解酸化,去除NH₃-N和P,接着采用絮凝与气浮去除悬浮物和部分的COD,最后采用活性Al₂O₃吸附水中残留物,出水可望达标。技术经济分析,投资总费用为483.1万元,按流量150m³/h,处理成本为0.67元/m³,设计工艺可靠且经济合理。

There are many kinds of pollutants (pH 2 ~ 3, containing floride 60 mg/L,total phosphorous 40 mg/L, NH3 - N 40 mg/L and SS 130 mg/L, etc) in acidic the phosphoric amine-containg wastewater. The requirements of the treated effluent are as follows: F 10 mg/L,TP 0.5 mg/L, NH3 - N 15 mg/L,pH 6 ~ 9. On the basis of the features of the wastewater, lime hydrolytic acidification is firstly adopted in order to remove NH3 - N and phosphorus. Then flocculation and flotation is used to treat SS and part of COD. Finally activated-Al2O3 is added to the wastewater, to absorb most of the remained pollutants. The quality of effluent is conform to the requirements. Through economic analysis of its investment, the total cost is about 4.831 million yuan, it takes 0.67 yuan/m3 on the wastewater treatment. We can draw such a conclusion that the design is feasible and economically reasonable.