污水污泥孔隙结构演变与水过性能之间的相关性:带有或没有碳化骨辅助的热水解效应
Jinxin Liu1, Huan Liu1, Chao He2
1School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
Water research
|October 18, 2024
概括
这项研究揭示了污泥脱水过程中孔隙结构的变化. 碳化骨辅助热水解 (CSkel-TH) 处理通过增强孔隙连接和促进水分去除,改善了污泥脱水.
科学领域:
- 环境工程 环境工程
- 材料科学 材料科学 材料科学
背景情况:
- 市政污水污泥由于含水量高和水友性,需要机械排水.
- 有效的污泥处理和处置取决于高效的脱水过程.
研究的目的:
- 调查污泥孔隙结构演变与脱水性能之间的直接相关性.
- 了解污泥蛋糕的崩,并开发有针对性的调节方法,以改善排水.
主要方法:
- 用自己设计的在线系统来监控排水过程.
- 对原始污泥,热水解 (TH) 污泥和碳化骨架辅助热水解 (CSkel-TH) 污泥进行比较分析.
- 深入分析过蛋糕结构扫描数据和过物质质量随时间推移.
主要成果:
- 原料污泥形成了具有高孔隙性的"封水层",阻碍了进一步的脱水.
- 处理TH污泥降低了孔隙性和孔隙连接性,恶化了除水性能.
- 通过CSkel-TH处理增加了孔径大小和连接性,从而实现了高效的水运输和排放.
结论:
- 泥孔结构显著影响排水效率.
- 通过优化孔状特征,CSkel-TH处理提供了一种有希望的策略,以提高污泥脱水率.
- 这项研究为有针对性的孔隙结构调节提供了基础,以改善高压污泥脱水.
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