硅酸盐水泥固化/稳定化剩余污泥探索研究

Inquiry Investigation about Solidification/Stabilization of Surplus Sludge Using Silicate Cement

卫建伟 付怀佳 梁纪灵 贺涵 韩婷婷 张颜 韩杰

Jianwei Wei Huaijia Fu Jiling Liang Han He Tingting Han Yan Zhang Jie Han

辽宁石油化工大学 土木工程学院，辽宁 抚顺 113001 淄博齐翔腾达化工股份有限公司，山东 淄博 255438

College of Civil Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，China Zibo Qixiang Tengda Chemical Co. ，Ltd. ，Zibo Shandong 255438，China

以普通硅酸盐水泥固化污水处理厂剩余污泥为建筑材料，探索了剩余污泥资源化处置方法。将剩余污泥与水泥按照一定配比混合均匀，置于标准养护箱中养护3~28 d，以污泥?水泥固结体无侧限抗压强度（RC）和总有机物质量分数（TOC）为评价指标。结果表明，当污泥与水泥质量比（Rm）为0.63、液固质量比（Rl/s）为0.31时，固结体28 d的RC约为6.9 MPa，该强度不满足非烧结砖最低强度要求，但满足剩余污泥填埋要求；污泥?水泥固结体浸出液中有机物质量分数（TOCl）较固结体中初始有机物质量分数（TOC0）减少约86%。硅酸盐水泥固化剩余污泥可以有效地将剩余污泥中有机物稳定在固结体中，对其进行填埋处理可有效抑制剩余污泥对土壤的二次污染。

In order to realize the resource disposal of surplus sludge from sewage treatment plant, ordinary silicate cement was used to solidify it as a building material. The surplus sludge and cement were mixed evenly according to a certain ratio and placed in a standard curing box for 3~28 days. The unconfined compression strength (RC) and total organic carbon (TOC) content of the sludge?cement consolidated body were used as evaluation indicators. It was found that the RC of 28 days for surplus sludge?cement solidified block could reach about 6.9 MPa when mass ratio (Rm) of surplus sludge to ordinary silicate cement and mass ratio (Rl/s) of liquid to solid are 0.63 and 0.31. The RC can't meet the minimum strength requirement of non?sintered brick, but meets the strength requirement for surplus sludge landfill. The total organic carbon value in leached solution (TOCl) of surplus sludge?cement solidified block decreased by about 86% compared with the initial value (TOC0) in consolidated block. It indicates ordinary silicate cement solidified surplus sludge can effectively solidify organics from surplus sludge in the solidified body, which can effectively inhibit the secondary pollution of surplus sludge for land in the landfill treatment process.

辽宁省科学技术厅博士启动基金项目(201601335);辽宁省教育厅青年基金项目(L2017LQN018);辽宁石油化工大学博士启动基金项目(2016xJJ?031)

10.12422/j.issn.1672-6952.2023.02.002