Experimental Study of Consolidation Behavior of Mature Fine Tailings Treated with Microbial Induced Calcium Carbonate Precipitation

2020 ◽  
Author(s):  
Qianwen Liu ◽  
Brina M. Montoya
Keyword(s):  
Experimental Study ◽  
Calcium Carbonate ◽  
Carbonate Precipitation ◽  
Calcium Carbonate Precipitation ◽  
Mature Fine Tailings ◽  
Fine Tailings ◽  
Consolidation Behavior

scholarly journals An experimental study of calcium carbonate precipitation with hydrate inhibitor in MEG recovery unit

2022 ◽  
Vol 8 ◽  
pp. 100061
Author(s):  
Fabiane S. Serpa ◽  
Gabriela M. Silva ◽  
Lucas F.L. Freitas ◽  
Elvio B. Melo Filho ◽  
Jailton F. Nascimento ◽  
...  
Keyword(s):  
Experimental Study ◽  
Calcium Carbonate ◽  
Carbonate Precipitation ◽  
Calcium Carbonate Precipitation ◽  
Recovery Unit

Mature fine tailings consolidation through microbial induced calcium carbonate precipitation

2015 ◽  
Vol 42 (11) ◽  
pp. 975-978 ◽  
Author(s):  
Jiaming Liang ◽  
Zhengyang Guo ◽  
Lijun Deng ◽  
Yang Liu
Keyword(s):  
Electron Microscopy ◽  
Shear Strength ◽  
Undrained Shear Strength ◽  
Carbonate Precipitation ◽  
Calcium Carbonate Precipitation ◽  
Calcite Precipitation ◽  
Mature Fine Tailings ◽  
Fine Tailings ◽  
Undrained Shear ◽  
Scanning Electron

The performance and mechanisms of a microbial induced calcite precipitation (MICP)-assisted mature fine tailings (MFT) consolidation method was assessed. Mature fine tailings samples of 35 wt% and 60 wt% were treated with MICP by ureolysis. The undrained shear strength of treated MFT was measured to evaluate the effects of MICP on MFT consolidation. To investigate the surface interaction mechanisms involved in the process, the size and shape of MFT particles were observed using scanning electron microscopy. The results showed that ureolysis-driven MICP can accelerate raw MFT consolidation, leaving compact sludge with significantly enhanced shear strength within 24 h of the experiment.

Experimental study on calcium carbonate precipitation using electromagnetic field treatment

2013 ◽  
Vol 67 (12) ◽  
pp. 2784-2790 ◽  
Author(s):  
Miao Xuefei ◽  
Xiong Lan ◽  
Chen Jiapeng ◽  
Yang Zikang ◽  
He Wei
Keyword(s):  
Crystal Structure ◽  
Experimental Study ◽  
Calcium Carbonate ◽  
Electromagnetic Fields ◽  
Cooling Water ◽  
Hard Water ◽  
Carbonate Precipitation ◽  
Constant Flow ◽  
Calcium Carbonate Precipitation ◽  
Electric Pulses

The present study investigated the effectiveness of electromagnetic fields in preventing calcium carbonate (CaCO3) fouling in cooling water. Four different frequencies and two different voltages were adopted to induce electromagnetic fields directly in water with constant water temperature and constant flow velocity. Artificial hard water was used. The solution conductivities decreased by 17–25% from their initial values in the electromagnetic anti-fouling treatment (EAT) cases, depending on different frequencies of electric pulses, whereas the untreated case dropped by 31%. The particle size became small and the crystal structure changed into loose style after EAT. The EAT device independently developed by the State Key Laboratory had been validated as an effective apparatus in preventing CaCO3 fouling in cooling water.

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