城乡综合生活污水量变化系数取值分析

The values of variation factor of urban and rural domestic sewage quantity

针对GB 50014—2021《室外排水设计标准》、CJJ124《镇(乡)村排水工程技术规程》及部分地方标准中综合生活污水量变化系数的取值进行分析,通过线性拟合确定综合生活污水量变化系数的计算公式,使用某市4座不同规模污水处理厂全年进水量计算实际变化系数值,并与理论计算值进行对比。结果表明:大水量段公式计算的变化系数与内插法所得结果基本相同,小水量段公式计算值略小于内插法计算值,宜根据平均日污水量采用不同计算公式计算变化系数。研究得到的综合生活污水量变化系数计算公式可供工程技术人员在相关工程设计时参考。

Based on the comparison and analysis of the values of comprehensive domestic sewage volume change coefficient in the GB50014—2021 Design Standard for Outdoor Drainage,CJJ124 Technical Code for Town(Township)Drainage Engineering and some local standards,the calculation formula of comprehensive domestic sewage volume peak variation factor is determined through linear fitting.Based on the annual inflow of four sewage treatment plants of different sizes in a city,the actual peak variation factor is calculated and compared with the theoretical calculation values.The results show that the change coefficient calculated by the calculation formula in the large water volume section is basically the same as that obtained by the interpolation method.The calculation value of the formula in the small water volume section is slightly smaller than that calculated by the interpolation method.The peak variation factor should be calculated by different formulas according to the average daily sewage volume.The calculation formula of the variation coefficient of the comprehensive domestic sewage volume obtained in the study can be used as a reference for engineers and technicians in engineering design.