以锰矿石氧化-磷酸铵镁沉淀-A/O组合工艺联合处理焦化废水.利用锰矿石氧化去除水中挥发酚等有机物,进水pH=2．0,水力停留时间22 min,挥发酚去除率达98．8%, COD去除率64．8%.出水经磷酸铵镁( MAP)沉淀处理,去除和回收大部分氨氮,在最佳pH=10．5时氨氮去除率达81．4%.以A/O工艺生物处理,混合液回流比200%, COD和氨氮去除率为93．8%和97．3%.焦化废水经组合处理后,挥发酚、 COD和氨氮去除率分别达98．8%、97．8%、99．6%.%The aim of this study was to treat coking wastewater by using a joint strategy of manganese ore oxidation-magnesium ammonium phosphate ( MAP) precipitation-A/O process. In the process of manganese ore oxidizing organic matters from coking wastewater, the removal efficiencies of volatile phenol and COD were respectively up to 98. 8% and 64. 8% at influent pH of 2. 0 and hydraulic retention time ( HRT) of 22 min. The effluent from manganese ore column was then treated by MAP process, and most of ammonium could be removed and recovered. The results showed that 81. 4% of ammonium was removed at the optimum pH ( 10. 5) in the MAP process. In the last process of A/O system, the removal efficiencies of COD and N were respectively 93. 8% and 97. 3% at the reflux ratio of 200%. The coking wastewater was efficiently treated by the joint strategy of manganese ore oxidation-MAP precipitation-A/O process, and the removal efficiencies of volatile phenol, COD and ammonium were 98. 8%, 97. 8% and 99. 6%, respectively.
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