Response of wastewater treatment performance and bacterial community to original and aged polyvinyl chloride microplastics in sequencing batch reactors

IF 9.7 1区环境科学与生态学 Q1 AGRICULTURAL ENGINEERING

Bioresource Technology Pub Date : 2025-01-06 DOI:10.1016/j.biortech.2025.132044

Menglong Li, Yizhen Cao, Xiaojing Yang, Jiawei He, Hao Zhou, Jingjing Zhan, Xuwang Zhang

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引用次数: 0

Abstract

Microplastics (MPs) are prevalent in wastewater treatment systems, and their behavior is further complicated after undergoing aging processes. This study explored the impact of original and aged polyvinyl chloride (PVC) MPs on wastewater treatment performance and bacterial communities. Results revealed that Fenton-aging treatment induced surface roughening of the MPs and altered their chemical properties. Prolonged exposure to original and aged PVC MPs severely inhibited the removal of chemical oxygen demand and NH4+-N, along with lower sludge concentrations. Additionally, PVC MPs increased the production of loosely-bound extracellular polymeric substances (EPS) and decreased protein levels in tightly-bound fractions. The presence of PVC MPs also shifted the bacterial community, reducing nitrogen removal bacteria while enriching EPS-forming bacteria. Furthermore, exposure to PVC MPs led to a decrease in the abundance of key genes involved in nitrogen metabolism. These findings offer insights into the effects of MPs, especially aged variants, on wastewater treatment processes.

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来源期刊

Bioresource Technology 工程技术-能源与燃料

CiteScore

20.80

自引率

19.30%

发文量

2013

审稿时长

12 days

期刊介绍： Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies. Topics include: • Biofuels: liquid and gaseous biofuels production, modeling and economics • Bioprocesses and bioproducts: biocatalysis and fermentations • Biomass and feedstocks utilization: bioconversion of agro-industrial residues • Environmental protection: biological waste treatment • Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.