城市污水处理厂设计进水水质确定和出水水质评价

以广州市各污水处理厂的进出水水质的实测数据为例,通过概率分析,进行了城市污水处理厂设计进水水质确定和出水水质评价的尝试。这些实测数据,经过适当变换,可以与标准正态分布曲线良好符合,说明它们基本遵从正态分布规律,并更加遵从对数正态分布规律。按照保证概率确定了该地区或类似地区的城市污水处理厂的设计进水水质,并利用达标概率评价了广州市各污水处理厂的出水水质。

Influent quality estimation and effluent quality evaluation of municipal wastewater treatment plants

In this paper, the test data of influent quality and effluent quality of municipal wastewater treatment plants in Guangzhou are analyzed by probability method to estimate the designed influent quality and to evaluate effluent quality. The test data transformed properly can be fitted well to normal distribution and better to logarithmic normal distribution. It is proved that the test data follow normal distribution rule approximatively and logarithmic normal distribution rule better. The designing influent quality is estimated according to the ensurence probability, and the effluent quality is evaluated by probability if meeting the standard.