聚丙烯微塑料对污泥厌氧消化效能作用影响

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Abstract Polypropylene (PP) microplastics (MPs) were used to investigate their effects on the production of methane (CH₄) and volatile fatty acids (VFAs) in sludge anaerobic digestion. The abundances of acetate kinase (AK) and mcrA genes under stresses of different amounts of PP MPs were determined by quantitative real-time PCR methods. The results showed that production of CH₄ and VFAs was enhanced by addition of PP MPs. The cumulative productions of CH₄ and acetic acid increased with increasing dosages of PP MPs. When the addition of PP MPs was 0.2g/g VSS, the cumulative productions of CH₄ and acetic acid increased by 148.2% to 227.1mL/g and 15.2% to 1291.2mg/L, respectively, compared with the controls. Correspondingly, the abundance of mcrA genes increased by 98.2%, which indicated that PP MPs had a promoting effect on the growth of methanogens, thereby enhanced CH₄production during sludge anaerobic digestion.

Key words： microplastics polypropylene sludge anaerobic digestion mcrA gene

Received: 30 September 2020

PACS:

X703.1

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	JIANG Xiao-ying
	LIU Yong-xi
	QIN Yan
	GAO Pin

Cite this article:

JIANG Xiao-ying,LIU Yong-xi,QIN Yan等. Effect of polypropylene microplastics on the performance of sludge anaerobic digestion[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(5): 2252-2257.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I5/2252

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