Oxygen demand for iron and manganese removal in biofilter was discussed by means of theoretical calculation and experiment. 从理论计算和试验两方面探讨了生物除铁除锰滤池中的曝气溶氧问题。
New technology of removing iron for purifying wet-process phosphoric acid using foam flotation has been studied. 采用泡沫分离技术净化湿法磷酸除铁是一种新工艺。