污水污泥的微波干燥:一种可持续的添加剂,用于改进粘土制造
Anđelina Bubalo1, Dražen Vouk1, Marko Rogošić2
1University of Zagreb, Faculty of Civil Engineering, Zagreb, Croatia.
Journal of environmental management
|May 8, 2025
概括
微波干燥污水污泥 (MDSS) 改善了烧土的性能,提高了压力强度和耐久性. 这种可持续的方法将废物回收成有价值的建筑材料,符合循环经济原则.
科学领域:
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
- 废物管理 废物管理
背景情况:
- 污水污泥 (SS) 是一种在循环经济中有可能重复使用的废物.
- 传统的SS干燥是耗时的,可能无法消除病原体.
- 微波 (MW) 干燥为SS.提供更快的干燥和病原体失活.
研究的目的:
- 评估使用干SS作为土的添加剂.
- 为了比较使用MW干燥SS (MDSS) 与传统干燥SS (CDSS) 制成的的性能.
- 评估SS含量对属性和环境安全的影响.
主要方法:
- 在粘土混合物中加入SS (高达20%).
- 在生产中MDSS和CDSS的比较.
- 机械性质的评估 (压力强度,吸水率,最初的吸收率).
- 分析重金属,矿物学,可溶盐,浸,生态毒性和放射性.
主要成果:
- 与CDSS相比,MDSS提高了的机械性能和耐久性,特别是5%的含量.
- 在5%的MDSS下,压力强度增加了35.35%,水吸收减少了11.11%,IRA减少了65.30%.
- 生态毒性测试最初表明有毒性,但浸出测试证实了惰性行为;放射性仍然低于欧盟限制值.
结论:
- MDSS是一种可行的添加剂,可以提高烧土的质量.
- 使用MDSS促进废物回收利用和循环经济原则.
- 用MDSS烧焦的粘土是环境安全的,其性能与传统相美.
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