基于水力模型的管网破损率与污水厂进水BOD5浓度之间的关系

随着城市建设的发展与城市化进程加快,城市排水管网作为城市地下的重要“脉络”,是人们安全生产生活的重要保障,而排放标准越来越严格,污水厂的处理成本逐渐升高。研究污水厂进水BOD₅浓度与管网破损率的关系,制定合理的管网修复方案,是保证各项污染物指标稳定达标的重要一环。本文运用水力模型(SWMM)建立昭通市中心城区污水管网模型,计算在不同管网破损率下污水处理厂的进水量和进水BOD₅浓度并分析其相关性。结果表明:在不同管网破损率下污水处理厂的进水量和进水BOD₅浓度存在明显差异,随着管网破损率上升,污水处理厂的进水量呈现上升趋势,进水BOD₅浓度呈现下降趋势,得到的管网破损率与污水处理厂进水BOD₅浓度关系图可支撑管网修复工作。

Relationship between Damage Rate of Pipelines Network and Influent BOD5 Concentration of WWTP Based on Hydraulic Model

With the development of urban construction and the acceleration of urbanization,the urban drainage pipelines network,as important"veins"of urban underground,is crucial guarantee for people's safe production and life.While discharge standards are more stricter and the treatment cost of wastewater treatment plant(WWTP)is gradually increasing.Studying the relationship between the BOD₅ concentration of WWTP and damage rates to formulate a reasonable pipeline network repair plan is important parts to ensure that various pollutant indicators stably meet the emission standards.In this paper,a hydraulic model(SWMM)was used to establish a sewage pipeline model in the downtown area of Zhaotong,to calculate the influent water volume and influent BOD₅ concentration of WWTP under different pipeline damage rates and analyze their correlation.Results showed that there was a significant difference between the influent volume and influent BOD₅ concentration of WWTP under different pipeline damage rates.As the pipeline damage rate increased,the influent volume of WWTP showed an upward trend,and the influent BOD₅ concentration showed a downward trend.The relationship between the pipeline damage rate and the influent BOD₅ concentration of WWTP could supports the repair of pipeline network.