原水水质对输水管道生物膜中异养菌生长情况的影响

Effect of Raw Water on Biofilm Heterotrophic Growth in Water Distribution Pipes

摘要: 为了研究原水水质对输水管道生物膜中异养菌 (heterotrophic, HPC) 生长情况的影响, 采用配制水样来模拟Ⅱ、Ⅲ和劣Ⅴ类地表水, 利用管道模拟反应器对其进行分析.结果表明:反应器运行45 d后, 分别采用Ⅱ、Ⅲ和劣Ⅴ类地表水作为进水的各模拟反应器生物膜中HPC数量均高于出水HPC数量, 且其生物膜中HPC数量分别稳定在1.1×10⁵、2.8×10⁵和5.9×105CFU/cm²;原水UV₂₅₄、正磷酸盐 (PO₄^3-) 质量浓度和浊度均与生物膜中HPC数量呈正相关关系, 其相关性系数r分别为0.506、0.552和0.272.

Abstract: The growth of heterotrophic (HPC) in water distribution pipes was studied, simulation pipeline reactors were used to simulate the water situation. Water samples were prepared in a laboratory to simulate Class Ⅱ, Ⅲ andⅤ or worse of the surface water standard.Resultsshow that the quantities of HPC in the biofilm are significantly higher than those in the bulk water, and are stabled at 1. 1 × 105, 2.8 × 10⁵, and 5.9 ×10⁵CFU/cm², respectively, after 45 days. UV₂₅₄ concentration and orthophosphate (PO₄^3-) concentration and turbidity in raw water are all positively correlated with the quantity of HPC in the biofilm, and the correlated coefficient are r = 0. 506, 0. 552, and 0. 272, respectively.