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针对煤矿酸性废水(AMD)具有污染组分多、危害程度严重、地面处理成本高等特点,以固定SRB污泥的生物麦饭石作为PRB活性填料,并添加Fe0构建生物-非生物协同去污的新型PRB井下原位修复系统,对AMD开展了连续动态、变负荷的模拟修复研究。实验结果表明,3个动态柱对p H均具有较强的调节能力,同时仅以麦饭石作为活性填料的PRB-3对Fe2+、Mn2+、NH3-N具有较好的去除效果,最大去除速率分别为45.77、9.23和12.10 mg/(L·d);以Fe0协同生物麦饭石的PRB-2在碳源充足时对SO2-4、Fe2+、Mn2+、NH3-N最高去除速率分别为552.29、57.64、14.51和7.05mg/(L·d),而相同条件下只以生物麦饭石作为活性填料的PRB-1对上述污染物的最高去除速率分别为446.62、57.20、10.87和3.53 mg/(L·d);应用PRB-2系统处理AMD不仅可以实现多种污染物的同步去除,还能实现无外加碳源的井下原位长效修复。
Aiming at the characteristics of coal mine acidic wastewater (AMD), such as contaminated components, serious damage and high cost of ground treatment, Bio-medical stone with fixed SRB sludge is used as PRB active filler and Fe0 is added to build bio-non-biological synergistic decontamination The new PRB underground in situ repair system, carried out on AMD continuous dynamic and variable load simulation study. The experimental results show that the three dynamic columns have a strong ability to regulate p H, while PRB-3 with only Maifan stone as the active filler has better removal effects on Fe2 +, Mn2 + and NH3-N, and the maximum removal rate (45.77, 9.23, and 12.10 mg / (L · d), respectively). The maximum removal rates of SO2-4, Fe2 +, Mn2 + and NH3-N for PRB-2 with Fe0 synergistic biomaterials were 552.29, 57.64, 14.51 and 7.05 mg / (L · d), respectively, while the maximum removal rates of PRB-1 with biomaterial stone as active filler under the same conditions were 446.62, 57.20, 10.87 and 3.53 mg / L · d). The application of PRB-2 system to treat AMD can not only realize simultaneous removal of various pollutants, but also realize long-term in situ repair without underground carbon source.