污泥调理对氨基糖苷类耐药菌的削减作用研究

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Abstract In this study, the impact of different sludge conditioning methods (polyacrylamide conditioning, Fe[III]/CaO conditioning, chemical acidification and bioleaching conditioning) on the streptomycin, gentamicin and kanamycin ARB in dewatered sludge cake and dewatering filtrate was investigated using heterotrophic plate counts. The results showed that PAM conditioning could not reduce the ARB in dewatered sludge cake and dewatering filtrate. Fe[III]/CaO conditioning and bioleaching conditioning not only reduced the amount of three kinds of ARB in dewatered sludge cake, but also completely eliminated the three ARB in dewatering filtrate. The chemical acidification conditioning reduced the ARB in dewatered sludge cake by 0.83~1.65 log units, but increased the ARB in dewatering filtrate by 0.26~0.39 log units. The removal of ARB in dewatered sludge cake significantly correlated with the degree of microbial cell destruction in conditioned sludge, implying that the destruction of microbial cells resulting from conditioning treatments was the main reason for the removal of ARB in dewatered sludge. Further study revealed that the amount of ARB rebounded during the natural storage of dewatered sludge cakes, which showed a certain environmental risk.

Key words： sludge conditioning antibiotic resistant bacteria dewatered sludge cake dewatering filtrate removal

Received: 15 June 2020

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X705

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	Articles by authors
	CHEN Yu
	JIANG Shuang
	MENG Xiao-qing
	WANG Dian-zhan
	ZHENG Guan-yu
	ZHOU Li-xiang

Cite this article:

CHEN Yu,JIANG Shuang,MENG Xiao-qing等. Reduction of aminoglycoside resistant bacteria by sludge conditioning processes[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(2): 755-762.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I2/755

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