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Quantifying Yeast Chronological Life Span by Outgrowth of Aged Cells
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在基于条件的扩散器维护中,区分污染和老化
Oscar Samuelsson1, Simon Bengtsson2
1IVL Swedish Environmental Research Institute, Valhallavägen 81, Stockholm, 114 28, Sweden.
Water research
|October 11, 2024
概括
有效的扩散器维护需要分离污染和老化效应. 污染会增加压力,而老化会令人惊地降低压力,老化会导致显著的氧气转移效率损失.
科学领域:
- 环境工程 环境工程
- 废水处理技术 废水处理技术
- 航空系统 航空系统
背景情况:
- 扩散器的维护对于在水资源回收设施 (WRRF) 中节能通风至关重要.
- 以前的研究经常结合了污染和老化效应,阻碍了有针对性的维护策略.
- 区分污染 (清洁) 和老化 (更换) 对于优化扩散器性能至关重要.
研究的目的:
- 单独分析污染和老化对扩散器性能的影响 (SOTE和DWP).
- 量化可归因于污染的性能损失与运行扩散器的老化.
- 为WRRF中改进的维护策略提供见解.
主要方法:
- 分析了来自各种WRRF的6个具有1.5至15年运行历史的扩散器.
- 开发了一种复杂的清洁程序,以隔离老化的污染效应.
- 在清洗前后测量标准氧气转移效率 (SOTE) 和动态湿压 (DWP) 的变化,与新膜相比.
主要成果:
- 污染使动态湿压 (DWP) 增加了高达40 mbar,这与之前的研究一致.
- 老龄化意外地将DWP降低了5-10 mbar.
- 由于组合效应的标准氧气转移效率 (SOTE) 损失达到28%;污染占<12%的损失,而老化则导致高达25%的损失.
结论:
- 衰老显著影响扩散器膜,导致大量的SOTE损失,这是以前没有记录的发现.
- 有效的WRRF维护需要独立监测污染和老化.
- 需要进一步的研究,以了解扩散膜衰老的机制.
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