有效的污泥管理:对生物废物和下水道沉积物进行再利用,用于烧
Hoa Nhan Nguyen1, Huyen T T Dang2, Lan T N Pham3
1Faculty of Materials Engineering, Hanoi University of Civil Engineering, Hanoi, Vietnam.
Journal of the Air & Waste Management Association (1995)
|June 25, 2024
概括
这项研究表明,使用高达30%的下水道污泥 (SS) 和大米 (RH-SS) 来制造烧,符合质量标准. 添加的米减少了和液中的重金属,有助于建筑垃圾的再利用.
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:
- 之前的研究探讨了将各种污水污泥和废物纳入粘土.
- 有限的研究已经调查了下水道沉积物的使用,特别是与大米,制造.
- 这项研究解决了生物废物再利用和建筑材料重金属减少的双重目标.
研究的目的:
- 调查使用下水道污泥 (SS) 和与大米混合的下水道污泥 (RH-SS) 作为烧生产中的部分粘土替代品的可行性.
- 评估制造的的物理,机械和化学特性.
- 评估米在最终产品中减轻重金属污染方面的有效性.
主要方法:
- 烧是由部分用SS和RH-SS混合物 (重量高达30%) 取代粘土制成的.
- 样本进行了线性收缩,吸水和压力强度的测试.
- 进行X射线衍射 (XRD) 和金属提取分析以确定重金属残留物.
主要成果:
- 使用高达30%的SS或RH-SS的烧符合粘土生产的技术标准.
- 关键性质包括压力强度>7.5 MPa,吸水率为11-16%,线性收缩率为<5%.
- 添加米显著降低了和水中的重金属度,低于美国环保署的限制.
结论:
- 使用高达30%的下水道污泥或与大米混合的下水道污泥生产烧是可行的,从而减少了30%的粘土使用.
- 制造的符合压力强度,吸水和收缩的基本质量标准.
- 使用米有效减轻重金属污染,使其成为可行的可持续建筑材料和废物管理策略.
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