嗜铁优势菌的筛选及对含铁废水的处理

通过在培养基中不断增加铁的含量来驯化活性污泥中的菌群.选择具有耐受性的嗜铁菌群,运用稀释倍数法和琼脂划线法纯化菌株,并从20种菌株中经嗜铁试验筛选出了2种优势单菌株.分别运用未驯化的菌株育膜、优势菌株育膜以及2种优势菌种混合育膜来处理含铁废水.试验结果表明,优势菌株对废水中的铁和COD的去除率都分别高达95%以上,比未驯化菌的效果(50%~60%)要好得多.

Screening of Iron-resistant Strain and Treatment of Iron-containing Wastewater

The microflora were domesticated from active sludge by increasing the iron constantly in culture media. The single strains were obtained from domesticated microflora by dilution multiple method and agar streaking. The two kinds of iron - resistant strains were screened by biosorption of iron - containing wastewater. Then the iron - resistant strain and mixing the two iron - resistant strains were inoculated to form biofilm which were applied to treat wastewater containing iron, compared with the unacclimated microflora. The results showed that the removal rates both of COD and iron can respectively reach above 95%, better than 50% - 60% for the unacclimated microflora.