通过快速的亚临界热水处理对无氧消化液的固体-液体界面化学成分进行改革,这对增强的体固体去除有影响
Jieling Feng1, Xiaoli Chai2, Xiaohu Dai2
1State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China.
Water research
|December 3, 2025
概括
这项研究介绍了一种新的亚临界水处理方法,用于从无氧消化液 (ADL) 中去除细体颗粒. 快速加热和火过程有效地使合物不稳定,显著减少悬浮固体,并改善生物降解性,副作用最小.
科学领域:
- 环境科学 环境科学
- 水处理技术水处理技术
- 合体化学 合体化学
背景情况:
- 无氧消化液 (ADL) 含有高度的细体颗粒,阻碍下游过程.
- 有效地去除这些颗粒对于改善ADL处理和治疗效率至关重要.
研究的目的:
- 开发和优化一个亚临界水处理策略,以改善ADL的体颗粒去除.
- 阐明环状颗粒破坏稳定和溶解有机物 (DOM) 的转化背后的分子机制.
主要方法:
- 快速加热和灭ADL到亚临界条件.
- 优化处理参数 (温度,时间) 和随后的离心.
- 使用超高分辨率里埃转换离子循环子子共振质谱法 (FT-ICR MS) 进行DOM的表征.
- 使用拉曼和总频率生成 (SFG) 谱学的体粒子不稳定机制的研究.
主要成果:
- >90%的悬浮固体从ADL中去除,在最佳条件下实现 (350°C,加热15分钟,离心3000g).
- 有机物的有限溶解 (可溶性COD增加<30%) 和类物质的部分降解,从而提高生物降解性.
- FT-ICR MS揭示了DOM的转化,包括芳香化合物的分解和形结构的形成.
- 谱分析表明,亚临界处理扰乱了界面水,削弱了水化排斥力,促进了颗粒聚合.
结论:
- 亚临界水处理是一种有效的物理策略,用于从ADL中去除体颗粒.
- 该过程改变了水界结构,导致合物不稳定,减少了污染负载.
- 这种方法为减轻二次污染和加强ADL治疗提供了一个有希望的方法.
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