对陈腐垃圾进行开采再利用是我国数千座生活垃圾填埋场面临的重大需求。本项目利用筛分细粒渣土富含腐殖质和微生物的肥沃壤土特征，提出采用微生物诱导稳定化方法将细粒渣土处理成绿化种植土壤的资源化思路。本项目拟系统测试细粒渣土的环境土工特性及其随降解稳定化程度的变化规律；在此基础上，优选渣土生化环境下具有良好MICP作用的微生物种类；接着开展MICP稳定细粒渣土的配方试验和生化反应过程的模拟柱试验，监测微生物代谢、钙与重金属离子形态转化、碳酸盐沉淀等动态平衡过程，揭示微生物诱导重金属稳定化机理，及其与土力学性质改良的协同作用机制；测试分析稳定化处理后渣土在常规及不利环境下的服役性能，形成高效环保的微生物诱导稳定化处理工艺，实现渣土重金属浸出浓度和土力学性质均满足绿化种植土壤的要求。本项目研究有望破解我国垃圾填埋场开采渣土出路难题，同时促进环境土工和微生物工程学科交叉发展。

Thousands of aged MSW landfills in China are facing with the major requirements of excavation for reultilization. The fine soil-like materials (FSM), which is the product of MSW landfill excavation, is rich in humic substances, microorganism and has the properties of fertile loam. This project proposes an idea of treating the FSM to be suitable for green soils by using microbially induced stabilization method. Firstly, extensive measurements would be conducted to investigate the geoenvironmental characteristics of FSM and their variations with degradation degree. After that, an optimizing selection of native isolates having great potential of calcium carbonate sedimentation for FSM would be carried out. Moreover, the column tests would be conducted for designing the mix proportion and investigating the biochemical process. In which tests, the dynamic equilibrium processes were monitored, involve the microbial metabolism, the form transformation between calcium and heavy metals and the carbonate precipitation. It is performed to focus on the synergistic mechanism of the microbially induced stabilization of heavy metals and the improvement of geotechnical properties. Finally, the long-term performance of the stabilized FSM under normal and extreme service environment would be investigated. On the above basis, an environmental and effective microbially induced stabilization technology for FSM would be developed. After the stabilization treatment of FSM, its heavy metal leachability and geotechnical properties would meet the requirements of green soils. This project would promisingly solve the proper utilization of FSM and promote the interdisciplinary development of environmental geotechnology and microbiological engineering.