配方优化和 flokulation-solidification-vacuum预加载对污泥处理的协同效应
Lufan Li1, Hongen Wu2, Xukun Yang1,3
1School of Engineering, Hangzhou City University, Hangzhou, Zhejiang, China.
Scientific reports
|April 9, 2025
概括
flokculation-solidification-vacuum preloading (FSVP) 方法有效地使用优化的固化剂去水污泥. 这种土壤改善技术提高了建筑的强度,实现了高的不受限制的压力强度.
科学领域:
- 地质技术工程 地质技术工程
- 环境工程 环境工程
- 材料科学 材料科学 材料科学
背景情况:
- 基础设施开发产生大量含水量高的污泥,需要有效的回收和管理.
- 现有的污泥处理方法在实现足够的脱水和强度以后使用时经常面临挑战.
研究的目的:
- 引入和评估用于污泥处理的化-固化-真空预加载 (FSVP) 方法.
- 优化复合固化剂,以提高固化和降低水泥含量.
- 评估花剂和固化剂对污泥脱水和强度发展的协同作用.
主要方法:
- 使用响应表面方法来确定最佳的复合固化剂成分 (53%的水泥,32%的米灰,15%的酸盐).
- 污泥样本用各种花剂 (聚化和阳离子聚烯胺) 和优化的固化剂进行处理.
- 应用了真空脱水来评估对改善土壤的综合影响.
主要成果:
- 最佳的花剂混合物显著改善了污泥的微孔含量和紧性,将孔径大小集中在0.01微米左右.
- 虽然花剂有助于排水,但固化剂对于实现目标不受限制的压力强度至关重要.
- 复合固化剂促进了水合和波佐兰反应,填充毛孔并增加了土壤强度.
结论:
- 使用优化的复合固化剂的FSVP方法有效地去水并加强污泥.
- 在7天内达到58kPa的风切削强度和365kPa的不受限制的压力强度,在28天内增加到586kPa.
- 这种方法为污泥管理和重复利用在建筑应用中提供了可行的解决方案.
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