通过蛋白质网络重塑,提高污泥脱水率,采用键驱动的深溶剂策略
Lichong Duan1, Shuyue Han1, Zhiwen Zhang1
1School of Environment, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, PR China.
Bioresource technology
|November 30, 2025
概括
一种新型的深溶解剂 (DES) 通过破坏细胞外聚合物物质 (EPS) 的键,有效地去水活性污泥. 这种绿色方法显著提高了污泥脱水性能,并提供了可持续的资源利用.
科学领域:
- 环境科学 环境科学
- 化学工程是化学工程的重要组成部分.
- 材料科学 材料科学 材料科学
背景情况:
- 活性污泥中的细胞外聚合物 (EPS) 保持水分,阻碍脱水.
- 在EPS蛋白中存在的键对于保持水分至关重要.
研究的目的:
- 合成和应用深度浸泡溶剂 (DES) 来加强活性污泥脱水.
- 阐明DES诱导的EPS结构和蛋白质构成变化的机制.
主要方法:
- 从胆化物和铁化物六水合物合成一个DES.
- 光谱分析 (FTIR,CD) 和密度功能理论 (DFT) 的计算.
- 污泥脱水性能评估 (毛细血管吸收时间,接触角度).
主要成果:
- 最佳的DES治疗减少了58%的毛细血管吸收时间.
- DES破坏了污泥花结构,中和了表面电荷,增加了疏水性 (接触角度从~10°到>35°).
- DES改变了蛋白质的二次结构 (减少α螺旋,增加β薄膜) 并削弱了EPS的结合能力.
结论:
- 通过修改EPS结构和蛋白质构成,DES处理有效地增强了污泥脱水.
- 通过DES的非共价相互作用破坏蛋白质骨干的键,促进疏水性残留物暴露.
- 这种键调节策略为污泥脱水和资源回收提供了一种绿色和高效的方法.
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