摘要
该文采用生物粉末活性炭(BPAC)-超滤(UF)组合工艺去除某污水厂二级出水中抗生素抗性基因(ARGs)和可溶性有机碳(DOC),并研究了ARGs在不同分子量区间的分布以及存在形态。结果表明:较直接UF工艺,BPAC-UF组合工艺对二级出水中ARGs和DOC的去除效果更优,组合工艺对tet A、tet C、tet X和sulⅠ的去除量为101.02~102.19,对DOC去除率为36.5%;组合工艺对不同类型有机物的去除效果更好,其对酪氨酸类蛋白质有机物去除率为21.7%,对其他类型有机物去除率均在60%以上;组合工艺膜出水中ARGs主要集中在大于30 kDa分子量区间,并且游离态ARGs浓度高于细胞态ARGs浓度;较直接UF,BPAC-UF组合工艺对细胞态和游离态ARGs的去除效果更好,去除率均在90%以上。
In this study,the removal efficiency of antibiotic resistance genes(ARGs)and dissolved organic carbon(DOC)in the secondary effluent of a wastewater treatment plant by the combination process of biological powdered activated carbon(BPAC)and ultrafiltration(UF)were investigated,and the distribution in different molecular weight and morphology of ARGs were also studied.The results showed that the removal efficiency of ARGs and DOC by BPAC-UF process was better than that by direct UF.The removal amount of tet A,tet C,tet X and sulⅠwas 101.02~102.19 and the DOC removal rate was 36.5%by the combined process.The combined process had better removal efficiency for different types of organic compounds.The removal rate of tyrosine protein organic compounds was 21.7%,and that of other types of organic compounds was above 60%.The ARGs in the effluent of BPAC-UF were mainly concentrated in the molecular weight range of more than 30 kDa,and the concentration of free ARGs was higher than that of cell ARGs.Compared with direct UF,the removal efficiency of cell and free ARGs by BPAC-UF process was better and its removal rate was all above 90%.
作者
孙丽华
朱珺瑶
阳兵兵
刘烨辉
高呈
冯萃敏
SUN Lihua;ZHU Junyao;YANG Bingbing;LIU Yehui;GAO Cheng;FENG Cuimin(Key Laboratory of Urban Rainwater System and Water Environment of Ministry of Education,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;School of Environmental and Energy Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Financial Street Holdings Co.,Ltd.,Beijing 100032,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2020年第9期21-26,共6页
Environmental Science & Technology
基金
国家自然科学基金(51678027)
关键词
抗生素抗性基因
生物粉末活性炭
超滤
分子量分布
存在形态
antibiotic resistance genes
biological powdered activated carbon
ultrafiltration
molecular weight distribution
morphology
