基于水质模型的污水系统提质增效方案效能评估

Efficacy Evaluation of Sewage System Quality Improvement and Efficiency Enhancement Scheme Based on Water Quality Model

摘要:

为了能有效评估海口市某污水处理厂系统提质增效工程方案的效能，采用流域排水系统水质模型构建了海口市某污水处理厂污水管网系统水质水量数学模型。建模总面积46.2 km²，建模对象有污水主干管，管径范围d300~d2 200，总管长约144 km，并根据现场实测污染物浓度数据对模型进行了校核。最后，使用校核后水质模型测算评估，结果显示，提质增效工程方案实施后，污水处理厂进水中的污染物BOD₅指标的浓度提升到73.5 mg/L，较现状64.4 mg/L提升了14.1%，达到考核指标要求。

Abstract:

To effectively evaluate the efficacy of the system quality improvement and efficiency enhancement project for a wastewater treatment plant (WWTP) in Haikou, a mathematical model for water quality and quantity of the sewage pipe network system of WWTP is established by using the watershed drainage system water quality model. The total modeling area is 46.2 km2, with the modeling objects including main sewage pipes. The range of pipe diameters is from d300 to d2200, and the total length of the pipe is about 144 km. The model is checked according to the on-site measured pollutant concentration data. Subsequently, the calculations and evaluations are performed with the checked water quality model. The results indicate that after the implementation of the quality improvement and efficiency enhancement scheme, the concentration of the BOD? pollutant index in the influent of WWTP increases to 73.5 mg/L, representing a 14.1% rise compared to the current level of 64.4 mg/L, and thus meeting the assessment criteria.