【摘要】 比较了升流式和降流式生物活性炭滤池（BAC）处理微污染湖泊水的效果,分析了两种炭池的生物量和活性,评估其出水生物安全性差异。结果表明,升流式BAC出水平均浊度（0.38 NTU）稍高于降流式（0.26 NTU）;而前者对COD_Mn的去除率（60.3%）高于后者（55.4%）,且对UV₂₅₄的去除率（75.3%）也高于后者（67.1%）。升流式BAC的微生物分布（7.6¹6.6 nmol P/cm³）比降流式更均匀（4.9¹9.7 nmol P/cm³,主要集中在上300 mm炭层）;前者单位活性炭的比耗氧速率（SOUR）为7.9×10^-3mg O₂/（cm³·h）,高于后者的6.5×10^-3mg O₂/（cm³·h）。然而,升流式BAC出水中平均菌落数（17 CFU/m L）略高于降流式（12 CFU/m L）,可以通过设置砂滤池来保障微生物安全性。更多还原

【Abstract】 The pollutants removal efficiencies,spatial distribution of microbial biomass and activity in up-flow/down-flow BAC filters were studied during treatment of micro-polluted lake water. Meanwhile,the bio-safety of their effluents was compared to evaluate the performance of two types of BAC.The results indicated that the average turbidity of up-flow BAC filters was 0. 38 NTU,which was slightly higher than that of down-flow BAC filters（0. 26 NTU）; the former could remove organic pollutants more effectively（60. 3%） than the latter（ 55. 4%）. Meanwhile,the removal efficiencies of the former for UV₂₅₄（75. 3%） was higher than that of the latter（67. 1%）. The up-flow BAC showed more homogeneous biomass distribution（ 7. 6-16. 6 nmol P/cm³） than that of down-flow BAC（4. 9-19. 7 nmol P/cm³）; moreover,the specific oxygen uptake rate（SOUR） per unit volume media of up-flow BAC was a-round 7. 9 × 10^-3 mgO₂/（ cm³·h）,which was higher than that of down-flow mode 6. 5 × 10^-3 mgO₂/（cm³·h）. However,the average bacterial colony number of the up-flow BAC effluent（17 CFU/m L）was slightly higher than that of down-flow BAC effluent（12 CFU/m L）. The bio-safety could be ensured by the subsequent sand filter.更多还原