摘要
以软性塑料纤维为填料而构建了氧化亚铁硫杆菌的固定化生物反应器,经低pH值和高浓度Fe2+长期驯化后,在初始pH=1.6、Fe2+浓度25 g/L、温度30℃、进气量0.45 m3/h、循环液体流量0.85 L/h的条件下,固定化细胞只需3 d,Fe2+氧化率可达82.27%,其Fe2+平均氧化速率为0.29 g/(L.h);固定化细胞达到80%以上的氧化率所需时间比游离细胞提前了4 d,其平均氧化速率是游离细胞的2.5倍。对低品位菱锰矿的浸出,在pH为1.7、温度60℃、Fe3+浓度20 g/L、矿浆浓度10%条件下,搅拌3.5 h可达将近85%的浸出率。
The bioreactor for Thiobacillns Ferrooxidans immobilization was built with soft plastic fiber as the filler. After a long-tern adaptation at low pH and high ferrous ion concentration, the immobilized cells needed only three days to oxidize 82.27% of the ferrous ions with an average Fe^2＋ oxidation rate of 0. 29 g/（L · h） at an initial pH = 6, Fe^2＋ concentration of 25 g/L, temperature of 30 ℃, air intake rate of 0. 5 m^3/h and liquid circulation rate of 0. 85 L/h . The time needed for the immobilized cells to achieve an oxidation rate of over 80% was four days ahead that for free cells, with the average oxidation rate 2.5 times that of the latter. In the leaching of low grade rhedochrosite ore, at pH of 1.7, temperature of 60 ℃, Fe^2＋ concentration of 20 g/L and pulp density of 10%, the leaching rate could reach 85% after stirring for 3.5 h.
出处
《金属矿山》
CAS
北大核心
2006年第11期50-53,共4页
Metal Mine
关键词
氧化亚铁硫杆菌
固定化细胞
驯化
菱锰矿浸出
Thiobacillus Ferrooxidans, Immobilized cell, Adaptation, Leaching of rhedochrosite ore
