CHENLi-hong,BAIHuan-long,WEIZhong-qing,et al.Impact of Secondary Water Supply Pipe Materials on Residual Chlorine Decline and Biofilm Formation on Pipe Walls in Pipe Networks[J].China Water & Wastewater,2025,41(7):47-55.
二供管材对管网余氯衰减及管壁生物膜的影响
- Title:
- Impact of Secondary Water Supply Pipe Materials on Residual Chlorine Decline and Biofilm Formation on Pipe Walls in Pipe Networks
- Keywords:
- secondary water supply; pipe material; residual chlorine decline; microbial community; biomass
- 摘要:
- 余氯不足是城镇供水末端水质不合格的主要原因，研究管材对二次供水余氯衰减的影响对保障饮水安全具有重要意义。基于此，创建了包含不锈钢管（SSP）、聚乙烯内衬钢管（PE-SP）、聚氨酯内衬球墨铸铁管（PU-DIP）、水泥砂浆内衬球墨铸铁管（CM-DIP）、水泥砂浆环氧密封层内衬球墨铸铁管（EPOXY-CM-DIP）5种管材的二次供水模拟系统，并且运行了三年，模拟了低余氯静态和动态工况下的余氯衰减情况，并通过16S rRNA基因高通量测序和实时荧光定量PCR（qPCR）技术对管壁生物膜进行微生物群落结构和生物量分析。结果表明，管材对余氯衰减系数k影响显著，5种不同管材静态和动态k的范围为0.032 2~1.908 3 h-1，并且不同管材k的排序为EPOXY-CM-DIP>CM-DIP>PU-DIP>PE-SP>SSP；基于16S rRNA基因拷贝数测定管壁生物量，其排序为PU-DIP（7.77×103 copies/cm2）>EPOXY-CM-DIP（4.95×103 copies/cm2）>PE-SP（2.14×103 copies/cm2）>CM-DIP（0.52×103 copies/cm2）>SSP（0.46×103 copies/cm2），PU-DIP是SSP管壁生物量的16.9倍；管材可以影响管壁生物膜群落，PE-SP和EPOXY-CM-DIP管壁的优势菌属为Sphingomonas，PU-DIP管壁的优势菌属为Phreatobacter，这两种菌均为耐氯菌。综合考虑余氯衰减及生物膜特性，SSP最适合作为二次供水管材，PE-SP次之。
- Abstract:
- Insufficient residual chlorine is the primary cause of substandard water quality at the terminus of urban water supply systems. Investigating the impact of pipe materials on residual chlorine decline in secondary water supply networks is crucial for ensuring drinking water safety. A secondary water supply simulation system incorporating five types of pipes， namely stainless steel pipe (SSP), polyethylene-lined steel pipe (PE-SP), polyurethane-lined ductile iron pipe (PU-DIP), cement mortar-lined ductile iron pipe (CM-DIP), and cement mortar epoxy sealing layer-lined ductile iron pipe (EPOXY-CM-DIP), was established and operated for a period of three years. The system simulated the decline of residual chlorine under both static and dynamic conditions with low residual chlorine. Additionally, the microbial community and biomass were analyzed using 16S rRNA gene high-throughput sequencing and real-time fluorescence quantitative PCR (qPCR). Pipe materials significantly influenced the residual chlorine decline coefficient k. The static and dynamic values of k ranged from 0.032 2 h-1 to 1.908 3 h-1. Among different pipe materials, the k values were ranked as follows: EPOXY-CM-DIP>CM-DIP>PU-DIP>PE-SP>SSP. The biomass on the pipe walls was quantified based on the copy numbers of the 16S rRNA gene. The values in descending order were as follows: PU-DIP (7.77×103 copies/cm2), EPOXY-CM-DIP (4.95×103 copies/cm2), PE-SP (2.14×103 copies/cm2), CM-DIP (0.52×103 copies/cm2), and SSP (0.46×103 copies/cm2). Notably, the biomass of PU-DIP was 16.9 times greater than that of SSP. The pipe material significantly influenced the microbial community of the biofilm on the pipe walls. The predominant bacterial strains identified on the walls of PE-SP and EPOXY-CM-DIP were Sphingomonas, while Phreatobacter was found to be dominant on the pipe walls of PU-DIP. Notably, both Sphingomonas and Phreatobacter exhibited resistance to chlorine. Considering residual chlorine decline and biofilm characteristics, SSP is the most suitable material for secondary water supply pipeline, followed by PE-SP.
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[1]李秀虹,刘则华,林青,等.中日两国自来水水质的重要影响因素全面对比分析[J].中国给水排水,2018,34(20):24.
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