了解不同废水处理过程中的微塑料存在:清除效率和来源识别
Min Ma1, Mingxin Huo2, Frederic Coulon3
1Engineering Research Center of Low-Carbon Treatment and Green Development of Polluted Water in Northeast China, Ministry of Education, School of Environment, Northeast Normal University, Changchun 130117, China; Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
The Science of the total environment
|April 25, 2024
概括
污水处理厂显著减少了微塑料,人口密度影响了影响水平. 活性污泥有效捕获微塑料,强调洗衣品和包装作为主要来源.
科学领域:
- 环境科学 环境科学
- 环境工程 环境工程
- 水处理技术水处理技术
背景情况:
- 城市污水处理厂 (WWTP) 是微塑料的重要环境来源.
- 了解不同WWTP过程中的微塑料动态对于有效的去除至关重要.
- 现有的关于不同处理阶段和工艺的微塑料配置的数据有限.
研究的目的:
- 量化分析微塑料度在不同处理单位的两个三级WWTPs与不同的过程.
- 调查影响WWTP影响的微塑料含量因素.
- 评估微塑料在各种处理阶段的去除效率,并确定主要的贡献来源.
主要方法:
- 在两个三级WWTP的多个处理单元的废水样本中对微塑料的定量分析.
- 氧化沟和集成固膜活性污泥工艺之间的微塑料度的比较.
- 多重对应分析以确定WWTP影响的微塑料的主要来源.
主要成果:
- 影响的微塑料度各不相同 (15.5 ± 3.5 到 38.5 ± 2.5 颗粒/L),受人口密度的影响比污水体积更大.
- 废水度显著降低 (1.0 ± 1.0 到 1.5 ± 0.5 颗粒/L),达到90-97%的去除.
- 初级处理有效地去除了较大和膜状的微塑料;活性污泥积累了大部分,作为初级沉降器. 洗衣和日常生活必需品被确定为主要贡献者.
结论:
- 废水处理工艺,特别是那些集成固定膜活性污泥工艺的工艺,显示出高的微塑料去除效率.
- 活性污泥在WWTP中对微塑料的捕获起着至关重要的作用.
- 建议针对洗衣品和消费品的源减少策略,以尽量减少微塑料的释放到环境中.
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