改性植物单宁絮凝剂对污水中抗生素抗性基因的去除效果

HOU Jun,LIU Jialin,PAN Zhengguo,YANG Zijun, WU Miao,YOU Guoxiang,MIAO Lingzhan,ZHOU Xiaowei, XU Yi

Water Resources Protection（2023）

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Abstract

采用二甲基二烯丙基氯化铵(DMDAAC)改性植物单宁絮凝剂(TGCC-A)对污水处理厂的二沉池出水进行絮凝处理,探究TGCC-A对污水中胞内抗生素抗性基因(iARGs)、胞外抗生素抗性基因(eARGs)的去除效果以及对后续污水储存过程中抗生素抗性基因(ARGs)丰度的影响.结果表明:9mg/L TGCC-A和7mg/L聚合氯化铝对原水中8种胞内目标基因的平均对数去除量分别为103.82 copies/mL、103.92 copies/mL,胞外目标基因的平均对数去除量分别为102.27 copies/mL、102.89 copies/mL;两种絮凝剂絮凝处理后的水样中同种ARGs在胞外的丰度都大于其在胞内的丰度,且在后续5 d的储存过程中8种目标基因丰度基本保持在絮凝后的即时丰度;TGCC-A对污水处理厂二级出水中的ARGs具有良好的去除和控制效果.

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Key words

modified plant tannin flocculant,antibiotic resistance genes,flocculation treatment,sewage disposal

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