Experimental Study of Consolidation Behavior of Mature Fine Tailings Treated with Microbial Induced Calcium Carbonate Precipitation
Experimental Study of Consolidation Behavior of Mature Fine Tailings Treated with Microbial Induced Calcium Carbonate Precipitation
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DOI：
10.1061/9780784482834.022
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发表时间：
2020-02
期刊：
影响因子：
--
通讯作者：
Qianwen Liu;B. Montoya
中科院分区：
文献类型：
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作者：
Qianwen Liu;B. Montoya
成熟细粒尾矿是油砂开采过程中的副产物，对地球环境学界构成了挑战。由于物料的物理特性，即尾矿中水的体积大、应变固结性好，需要较大的蓄水池来储存MFT。微生物诱导碳酸钙沉淀（MICP）处理已被证明可以有效加速MFT的脱水过程；然而，MICP治疗后MFT固结行为的变化尚未被研究。本文建立了浆料固结计来评价MICP处理后MFT的压缩性和渗透性。试验结果表明，MICP可以在最小的渗透性降低的情况下形成土壤骨架，从而加速MFT的沉降。
Mature fine tailings (MFT) are by-products from oil sands extraction processes and pose a challenge to the geo-environmental community. Large impoundments are required to store MFT due to physical characteristics of the material, namely the high volume of the water in tailings and large-strain consolidation behavior. Microbial induced calcium carbonate precipitation (MICP) treatment has been previously demonstrated to effectively accelerate the dewatering process of the MFT; however, the change to the consolidation behavior of the MFT after MICP treatments has not been examined. In this paper, slurry consolidometers are constructed to evaluate the compressibility and permeability properties of MFT after MICP treatment. The presented test results indicate MICP can help accelerate the settlement of MFT by developing the soil skeleton with a minimal decrease in permeability.