During the last three decades, China has attained noteworthy advances in municipal sanitation. The country has constructed a highly large infrastructure for treating wastewater, with 94.5% treatment coverage in urban areas and legally mandated nation-wide full nutrient removal applied. Nevertheless, domestic wastewater treatment plants (WWTPs) are yet defied with problems rooted in the singular sewage properties. Recently, Cao et al. [1] compared energy recovery, price of nutrient reduction and sludge formation among Chinese urban WWTPs and those in nations with longer wastewater treatment traditions, and underlined the cause-effect relationships among Chinese sewage properties—high inorganic suspended solids (ISS) loads, and low COD and C/N ratio, and municipal WWTP process performance in China. Combined design and running guidelines for domestic WWTPs are crucial in relation to the singular sewage properties in China. Cost-efficient actions and solutions are suggested by Cao et al. [1], and the likely advantages of enhancing the sustainability of urban WWTPs in China are evaluated.
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