YANGChengrui,LIWeiying,SONGXin,et al.Potential Impacts of Different Water Sources on Water Supply Network[J].China Water & Wastewater,2026,42(3):46-52.
不同水源对供水管网的潜在影响
- Title:
- Potential Impacts of Different Water Sources on Water Supply Network
- Keywords:
- water source; water supply network; water quality; pipe wall biofilm; heavy metals; corrosion tendency
- 摘要:
- 基于南方某市实际供水管网，探究江河水（A）及水库水（B）两种水源对供水系统中管网水及管壁生物膜的潜在影响。结果表明，B管网水质更优，其有机碳（TOC）、氯化物浓度分别为（1.37±0.26）、（6.66±1.03） mg/L，拉森比率（LR）为0.67±0.17。相较于A管壁，B管壁生物膜中Mn、Al、Fe含量更高，分别为（47.70±8.07）、（337.44±5.10）、（332.17±127.82） mg/cm2，这可能是管网水中腐殖酸类有机质络合重金属离子所致。管网水中生物量的增加缘于管壁生物膜的释放，且A管壁附着的生物量更高，达到106.35±6.05 cells/cm2。另外，A管网水中的菌属多样性高于B管网水；A、B管壁生物膜中的优势菌属Pseudomonas相对丰度分别达到41.8%、49.7%，需重点关注，以保障居民用水安全。
- Abstract:
- This study investigates the potential impacts of two water sources—river water (A) and reservoir water (B)—on bulk water and pipe wall biofilm in an actual drinking water distribution system located in a city in southern China. The results indicated that the water quality in network B was superior, with total organic carbon (TOC) and chloride concentrations of (1.37±0.26) mg/L and (6.66±1.03) mg/L, respectively, and Larsen’s ratio (LR) of 0.67±0.17. Compared to biofilm from network A, biofilm from network B showed higher contents of Mn, Al, and Fe, measuring (47.70±8.07) mg/cm2, (337.44±5.10) mg/cm2, and (332.17±127.82) mg/cm2, respectively. This might be attributed to the complexation of metal ions by humic-like organic matter present in the bulk water. Furthermore, the increase in biomass in the bulk water originated from the release of pipe wall biofilm, with network A biofilm exhibiting a higher attached biomass of 106.35±6.05 cells/cm2. Bacterial community analysis revealed higher genus-level diversity in bulk water from network A compared to network B. In both networks, Pseudomonas was the dominant genus in the pipe wall biofilm, with relative abundances of 41.8% and 49.7% in A and B, respectively, warranting particular attention to ensure safe drinking water for consumers.
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