Possibilities for using biologically-produced sulphur for cultivation of Thiobacilli with respect to bioleaching processes
Possibilities for using biologically-produced sulphur for cultivation of Thiobacilli with respect to bioleaching processes
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DOI：
10.1016/0960-8524(94)90150-3
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发表时间：
1994
影响因子：
11.4
通讯作者：
R. Tichý;A. Janssen;J. Grotenhuis;G. Lettinga;W. Rulkens
中科院分区：
文献类型：
--
作者：
R. Tichý;A. Janssen;J. Grotenhuis;G. Lettinga;W. Rulkens
使用两种不同类型的元素硫，商业上可获得的硫磺花和干燥的，生物生产的硫，在分批培养的混合培养ofthiobacillis的生长进行了评价。后一种物质是由嗜热硫杆菌的混合培养物在氧限制下通过硫化物的部分氧化产生的。该步骤可在实践中应用于去除含硫酸盐废水处理过程中形成的硫化物。生物产生的硫可以通过沉淀从工艺水中去除。一旦考虑应用生物硫循环从受污染的环境中去除重金属，其再利用可能变得重要。生物产生的硫氧化速度明显快于硫磺花，导致硫酸生产率更高。用生物硫在65 h后达到pH 1.5，而用硫磺花在培养160 h后达到该pH。生物硫氧化伴随着硫颗粒的分解，导致生长培养基中基质的高度均匀性。研究结果表明，生物沥滤技术的潜力可能受益于生物产生的硫的再利用。
The growth of a mixed culture ofthiobacilliwas evaluated in batch cultivations using two different types of elemental sulphur; commercially available sulphur flower and a dried, biologically produced, sulphur. The latter material was produced by partial oxidation of sulphide under oxygen limitation by a mixed culture of neutrophilicthiobacilli. This step can be applied in practice to remove sulphides formed during treatment of sulphate-containing wastewater. The biologically-produced sulphur can be removed from the process water by sedimentation. Its reuse may become important once the application of the biological sulphur cycle is considered for the removal of heavy metals from a contaminated environment. Biologically-produced sulphur oxidized significantly faster than sulphur flower, resulting in higher rates of sulphuric acid production. With biological sulphur pH 1·5 was reached after 65 h, whereas with sulphur flower this pH was obtained after 160 h of cultivation. The biological-sulphur oxidation was accompanied by a disintegration of sulphur particles, resulting in a high homogeneity of the substrate in a growth medium. The presented findings indicated that the potential of bioleaching techniques may benefit from the reuse of biologically-produced sulphur.