聚乙烯微塑料对去除和细菌群体的影响,在不同液压保留时间的批量反应堆中测序批量反应堆
Bing Wang1, Yaohui Liu1, Guozhuang Chen1
1College of Environment Science, Liaoning University, Shenyang, China.
Journal of environmental management
|April 16, 2025
概括
微塑料 (MP) 通过放大更短的液压保留时间 (HRT) 的积极影响,显著提高了废水处理中的去除. 这项研究揭示了MP如何改变细胞外聚合物物质和细菌群落,改善治疗性能.
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:
- 液压保留时间 (HRT) 和微塑料 (MP) 是影响生物废水处理的关键因素.
- 在废水处理性能方面,HRT和MP之间的相互作用仍未得到充分研究.
- 聚乙烯微塑料 (PE-MPs) 是普遍存在的环境污染物.
研究的目的:
- 为了研究PE-MPs对排序批量反应堆 (SBR) 在不同的HRT下去除的作用.
- 分析PE-MPs如何影响细胞外聚合物物质 (EPS),细菌群落和代谢途径对HRT的反应.
- 阐明PE-MPs在废水处理的HRT依赖性能的干预机制.
主要方法:
- 使用带有和没有PE-MP (0.5 mg/L) 的测序批量反应器 (SBR) 的实验设置.
- 变化的液压保留时间 (HRT) 从1440到720分钟.
- 对细胞外聚合物物质 (EPS) 组成 (蛋白质和多糖含量),细菌群落和代谢途径 (化和脱酶) 的分析.
主要成果:
- 缩短HRT减少了化学氧气需求 (COD) 和氨去除分别为13.21%和3.78%,没有PE-MPs.
- 在0.5mg/LPE-MPs的存在下,缩短HRT可分别提高73.36%和93.85%的COD和氨去除.
- PE-MPs放大了HRT缩短对EPS蛋白 (PN) 和多糖 (PS) 水平的积极影响,芳香PN更敏感.
- 在不同HRT中,PE-MP导致化和脱化途径中的酶水平降低.
结论:
- PE-MPs显著提高了SBR中去除效率,特别是当HRT缩短时.
- PE-MPs调节EPS组成和细菌代谢,调节HRT对废水处理性能的影响.
- 这项研究为微塑料和生物废水处理中的操作参数之间的复杂相互作用提供了新的见解.
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