Digested sewage sludge solidification by converter slag for landfill cover.
Digested sewage sludge solidification by converter slag for landfill cover.
复制标题
DOI：
10.1016/j.chemosphere.2004.10.038
复制
发表时间：
2005-04
期刊：
影响因子：
8.8
通讯作者：
Eung-ho Kim;Jinwoo Cho;S. Yim
中科院分区：
文献类型：
--
作者：
Eung-ho Kim;Jinwoo Cho;S. Yim
以转炉渣为固化剂，生石灰为助凝剂，开发了一种新的消化污泥固化工艺--转炉渣固化法。通过对固化污泥的物理化学性质的分析和微观结构特征的测定，研究了化学气相沉积技术。在节约回收废物的背景下，考虑了使用固化污泥作为垃圾填埋场覆盖材料的可行性。使用css技术固化的污泥显示出适合于取代当前使用的覆盖土的岩土特性。X射线衍射仪、扫描电子显微镜和能谱分析表明，固化体的主要水化产物为CSH(CaO·SiO_2·nH_2O)，它可能在有效固化过程中起重要作用。固化污泥中重金属的淋洗效果可以忽略不计。水化污泥、矿渣和生石灰的固化过程消除了大肠菌群。CCS工艺固化的再生污泥可作为有效的垃圾填埋场覆盖物。
A new technology for solidification of digested sewage sludge referred to as converter slag solidification (CSS) has been developed using converter slag as the solidifying agent and quick lime as the solidifying aid. The CSS technology was investigated by analyzing the physicochemical properties of solidified sludge and determining its microstructural characteristics. The feasibility of using solidified sludge as a landfill cover material was considered in the context of the economical recycling of waste. Sludge solidified using the CSS technology exhibited geotechnical properties that are appropriate for replacing currently used cover soil. Microscopic analyses using XRD, SEM and EDS revealed that the main hydrated product of solidification was CSH (CaO·SiO2·nH2O), which may play an important role in the effective setting process. Negligible leaching of heavy metals from the solidified sludge was observed. The solidification process of the hydrated sludge, slag and quicklime eliminated the coliform bacteria. Recycled sewage sludge solidified using CCS technology could be used as an effective landfill cover.