He Kai, Shono Wataru, Liu Zejun, Asada Yasuhiro, Echigo Shinya, Nakanishi Tomohiro, Itoh Sadahiko
School of Civil Engineering, Sun Yat-Sen University, Guangzhou, People's Republic of China.
Department of Environmental Engineering, Graduate School of Engineering, Kyoto University, Kyoto, Japan.
Environ Technol. 2023 Dec;44(28):4272-4283. doi: 10.1080/09593330.2022.2089599. Epub 2022 Jun 22.
Soil aquifer treatment (SAT) has been widely applied for wastewater reclamation, which cooperates secondary treatment (i.e. AO process) and disinfection treatment (chlorination) in wastewater treatment plants (WWTPs), to remove organic matter. This study compared dissolved organic carbon (DOC) characteristics, substrate utilisation patterns, and microbial communities between pre-chlorination SAT and SAT columns, and effective removals of DOC were observed in the pre-chlorination SAT and SAT columns. However, the composition of HiA in SAT columns without chlorination was less than in pre-chlorination SAT columns for DOC fraction. In comparison to AO effluent, different metabolic patterns and the composition of the microbial community were demonstrated by the top layer of SAT column and pre-chlorination SAT column. Furthermore, deeper layers showed similarities in the metabolic pattern and composition of the microbial community. Overall, pre-chlorination minimised the change of the microbial communities from AO effluent in the top layer of SAT except for deeper layers, and DOC concentrations decreased in pre-chlorination SAT column. Thus, the cooperation of SAT and wastewater treatments could be suitable for wastewater reclamation.
土壤含水层处理（SAT）已被广泛应用于废水回收，它在污水处理厂（WWTPs）中与二级处理（即AO工艺）和消毒处理（氯化）协同作用，以去除有机物。本研究比较了预氯化SAT柱和SAT柱之间的溶解有机碳（DOC）特性、底物利用模式和微生物群落，并且在预氯化SAT柱和SAT柱中均观察到了DOC的有效去除。然而，对于DOC组分，未氯化的SAT柱中高芳香性有机物（HiA）的组成低于预氯化SAT柱。与AO出水相比，SAT柱顶层和预氯化SAT柱顶层表现出不同的代谢模式和微生物群落组成。此外，更深层在微生物群落的代谢模式和组成上表现出相似性。总体而言，除深层外，预氯化使SAT顶层中来自AO出水的微生物群落变化最小，且预氯化SAT柱中的DOC浓度降低。因此，SAT与废水处理的协同作用可能适用于废水回收。
