Bacteriological changes associated with granular activated carbon in a pilot water treatment plant

摘要: Bacteriological analysis were performed on collected water samples from a conventional treatment pilot plant in Cincinnati, Ohio which granular activated carbon (GAC) has been used as the final process to assess impact of GAC bacteriological quality and incidence antibiotic resistant bacteria produced. Heterotrophic bacterial counts (HPC) at 20 °C was stabilized 102 194 cfu mL-1 did not markedly differ different processes. On other hand, slight reduction HPC observed for effluent produced sand filter contactors. Effluents both contactors showed 2 log coliforms count. Fecal coliform same rate result filtration, while it reached undetectable numbers Subculturing isolated strains tryptic soy broth revealed that 61.3, 61.5, 12.6 8.5% 28 °C, total fecal coliform, respectively non-culturable. In this case, R2A or R3A subculturing media. The among isolates varied significantly according source samples. Multiple resistance (MAR) always high overall high. species composition considerably Selection exhibiting antibiotics under some experimental conditions using doses chlorine. character mostly transferable. As conclusion, use no observable adverse effect investigation.