CAJ | 학술논문

采用对钼有一定耐受性的嗜热金属硫叶菌结合膜反应器浸出镍钼矿.结果表明:由于膜生物反应器(MBR)中膜的过滤作用,使浸出液中的钼浓度保持在该菌可以耐受的范围内,从而实现细菌对矿物相对高效的浸出.在矿浆浓度100 mg/L、通气量1.0 L/min下,将MBR浸出液中钼被控制在不同浓度,镍、钼的浸出率各不相同.当MBR浸出液中钼的浓度不超过395 mg/L时,镍和钼的浸出率达到79.57%和56.23%;而在相同条件下的柱浸,镍、钼浸出率为75.59%和54.33%,低于相同条件下MBR浸出.
채용대목유일정내수성적기열금속류협균결합막반응기침출얼목광.결과표명:유우막생물반응기(MBR)중막적과려작용,사침출액중적목농도보지재해균가이내수적범위내,종이실현세균대광물상대고효적침출.재광장농도100 mg/L、통기량1.0 L/min하,장MBR침출액중목피공제재불동농도,얼、목적침출솔각불상동.당MBR침출액중목적농도불초과395 mg/L시,얼화목적침출솔체도79.57%화56.23%;이재상동조건하적주침,얼、목침출솔위75.59%화54.33%,저우상동조건하MBR침출.
The bioleaching of molybdenum from its sulfide ore using a Mo-resistant thermophilic bacterium sulfolobus metallics combined with a membrane biological reactor (MBR) was studied.The experimental results showed that the concentration of Mo can be controlled by filter of the membrane in MBR and the toxicity of Mo to microorganism is decreased in the process of bioleaching.It was also evidenced that there were different leaching rates of Ni and Mo when the concentration of Mo was different.After leaching for 20 d in the MBR at Mo concentration of 395 mg/L,the leaching rates of Ni and Mo reached the maximum of 79.57％ and 56.23％ respectively under the conditions of 100 g/L of mineral density,65 C,pH=2 and 1.0 L/min of the aeration rate.While 75.59％ Ni and 54.33％ Mo were leached out in column without membrane under the same conditions.