The gradual updating of the water supply network is one of the crucial ways to ensure the safety of drinking water all over the world. The phenomenon and regularity of the biological risk and chemical risk of biofilms of the new pipes in drinking water distribution system (DWDS) is inadequate researched by now. In order to explore the biochemical risks of biofilms after new pipes are used, this paper studied the growth of biofilms, the content of disinfection by-products (DBPs) and the potential for disinfection by-products (DBPsFP) after 2-year use by establishing a pilot test platform at both ends of the DWDS in City S. The results showed that the total bacterial count in new pipelines was between 1.38 × 108-9.97 × 108/cm2; the DBPsFP at the front end and at the back end was subtly different. The overall DBPsFP of biofilms was the highest, followed by the ductile cast iron pipe and the galvanized pipe whereas the stainless steel pipe was the lowest. The HPC content of the 2-year-old pipe (1.68 × 105-7.09 × 106 CFU/cm2) was remarkably higher than that of the 1-year-old pipe (1.04 × 105-8.76 × 105 CFU/cm2), and the generation DBPsFP was about 50% higher. When a new pipeline was put into use in the urban drinking water distribution system, biofilms with certain biological hazards and risks of DBPs disinfection by-products would form in a short period of time.

中文翻译：

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从饮用水分配系统两端的新管道中形成生物膜，并比较消毒副产物的形成潜力。

供水网络的逐步更新是确保全世界饮用水安全的关键方法之一。饮用水分配系统（DWDS）中的新管道的生物膜生物膜的生物风险和化学风险的现象和规律目前尚未得到足够的研究。为了探讨使用新管道后生物膜的生化风险，本文研究了生物膜使用2年后生物膜的生长，消毒副产物（DBPs）的含量以及消毒副产物（DBPsFP）的潜力。结果表明，新管道中细菌总数为1.38×108-9.97×108 / cm2；新管道中细菌总数为1.38×108-9.97×108 / cm2。前端和后端的DBPsFP略有不同。生物膜的总体DBPsFP最高，其次是球墨铸铁管和镀锌管，而不锈钢管最低。2年龄管道的HPC含量（1.68×105-7.09×106 CFU / cm2）明显高于1年龄管道的1.04×105-8.76×105 CFU / cm2，并且DBPsFP一代提高了约50％。当一条新的管道在城市饮用水分配系统中投入使用时，会在很短的时间内形成具有某些生物危害和DBP消毒副产物风险的生物膜。