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聚烯微塑料对污水处理中的膜生物反应器性能的影响

Zongming Liu¹, Wenwen Liu², Zhiyong Zhou¹

¹School of Civil Engineering and Architecture, University of Jinan, No. 336 Nanxinzhuang West Road, Jinan, 250022, Shandong Province, PR China.

Environmental research

|January 20, 2025

概括

聚烯微塑料 (PP-MPs) 影响膜生物反应器 (MBR) 的效率. 低度刺激生物活动,而较高度和较小颗粒大小则抑制它,增加膜污染.

科学领域:

环境科学环境科学
环境工程环境工程
微生物学微生物学

背景情况:

膜生物反应器 (MBR) 显示出微塑料 (MP) 清除的潜力,因为它们的排斥率很高.
MP度和粒子大小对MBR运行效率的短期和长期影响需要进一步调查.

研究的目的:

研究不同聚烯微塑料 (PP-MP) 度和颗粒大小对MBR运行效率的影响.
系统地分析PP-MPs对污染物去除,生物活性,细胞外聚合物物质 (EPS),膜污染和微生物群落的影响.

主要方法:

三个MBR系统在四个不同的PP-MP度阶段下运行.
分析包括污染物去除率,生物活性测定,EPS成分,膜污染监测和微生物社区概况.

主要成果:

低PP-MP度 (0.02g/L) 最初刺激了生物活动,但小颗粒大小显示出更高的毒性和加速的污染.
增加的PP-MP度 (0.2-2.0g/L) 和长时间暴露导致有毒抑制,增加EPS,并加剧了膜污染,特别是较小的颗粒.
在0.02 g/L PP-MPs下,微生物多样性增加 (例如,Bacteroidota),而蛋白质细菌的生长被抑制.

结论:

PP-MPs显著影响MBR性能,其中度和颗粒大小是关键因素.
小型PP-MP具有更大的风险,导致毒性并加速污染.
结果提供了MP-MBR相互作用的见解,并指导未来研究MP在废水处理中的影响.

关键词:

膜生物反应器 (MBR) 是一种微生物社区的微生物社区.聚烯聚烯的使用方法有毒效应有毒效应有毒效应

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