供水管网内生物膜与余氯衰减交互作用

发布时间：2018-08-02 08:08

【摘要】：为研究生物膜与余氯衰减之间的交互作用,通过静态试验、动态试验相结合的模拟方式,在自制供水管网模拟装置内进行实验.选择铸铁、PE、不锈钢3种管材及1,3,4 mg/L 3个投氯量,多角度研究不同质量浓度余氯存在条件下生物膜的形成和发展差异,以及生物膜作用下的余氯衰减情况,探讨管网内余氯和生物膜的相互影响.结果表明:余氯质量浓度对生物膜的形成和发展具有较显著的影响,另一方面,在生物膜作用下,余氯衰减呈现不同的规律,二者之间交互作用,具体表现为:投氯量升高,PE和不锈钢管内生物量均逐渐降低,而铸铁管内生物量反而升高;在生物膜作用下,余氯衰减分为快速消耗阶段(0~30 min)和稳定消耗阶段(30 min之后);铸铁管内生物膜对余氯衰减状况影响较大,PE管次之,不锈钢管对余氯衰减影响最小;生物膜的生物多样性对余氯衰减影响不大,而生物量与余氯衰减之间关系密切;流速和初始氯质量浓度对余氯衰减影响较大.本研究结果可为供水管网氯消毒的控制以及氯衰减模型的建立提供必要的理论支撑,强化管网水质安全的保障.
[Abstract]:In order to study the interaction between biofilm and residual chlorine attenuation, the experiment was carried out in a self-made water supply network simulator by means of static test and dynamic test. The formation and development of biofilm under different concentration of residual chlorine and the decay of residual chlorine under biofilm action were studied from three kinds of cast iron peels, three stainless steel pipes and three chlorine dosages of 1: 3 ~ 3 ~ 4 mg/L. The interaction between residual chlorine and biofilm in pipe network is discussed. The results show that the concentration of residual chlorine has a significant effect on the formation and development of biofilm. On the other hand, under the action of biofilm, the decay of residual chlorine presents different laws, and the interaction between them. The results showed that the biomass of PE and stainless steel pipe decreased gradually with the increase of chlorine content, but the biomass of cast iron pipe increased, and under the action of biofilm, the biomass of PE and stainless steel pipe decreased gradually. The residual chlorine decay can be divided into rapid consumption stage (0 ~ 30 min) and stable consumption stage (after 30 min), while biofilm in cast iron pipe has a greater influence on residual chlorine attenuation than PE tube, and stainless steel tube has the least effect on residual chlorine attenuation. The biological diversity of biofilm had little effect on residual chlorine decay, while biomass had a close relationship with residual chlorine decay, and the velocity of flow and initial chlorine concentration had great influence on residual chlorine decay. The results of this study can provide necessary theoretical support for the control of chlorine disinfection and the establishment of chlorine attenuation model in water supply networks, and strengthen the safety of water quality in water supply networks.
【作者单位】：哈尔滨工业大学市政环境工程学院城市水资源与水环境国家重点实验室;北京电子科技职业学院生物工程学院;
【基金】：国家自然科学基金(51578180;51308149) 城市水资源与水环境国家重点实验室(哈尔滨工业大学)自主课题(2014TS08)
【分类号】：TU991.33

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