Fig. 5
From: A Dataset of Distribution and Characterization of Underground Wastewater Treatment Plants in China
The treatment process and discharge standards selection of both U-WWTPs and A-WWTPs in across various provinces in China. The treatment process selection of U-WWTPs (a) and A-WWTPs (b). In Fig. 5a and b, the percentages in these subfigures denote the proportion of WWTPs within each province that utilize a specific treatment process compared to the total number of WWTPs in that province. Darker colors indicate a more frequent adoption of the particular treatment process within the province. The discharge standards selection of U-WWTPs (c) and A-WWTPs (d). In Fig. 5c and d, the percentages in these subfigures denote the proportion of WWTPs within each province that utilize a specific discharge standard compared to the total number of WWTPs in that province. Darker colors indicate a more frequent adoption of the particular discharge standard within the province.
