Abstract. Iron chemical-biological process was widely applied in desulfurization and hydrometally. 9K medium is used usually in this process. However, 9K medium is regarded as an optimal medium for suspended A. ferrooxidans culture. Iron oxidation rate is slow and some precipitation would be formed when the medium is used in this process. In this paper, a novel liquid mixture for iron chemical-biological process was reported: (NH 4 ) 2 SO 4 1 g/L, K 2 HPO 4 0.2 g/L, KCl 0.15, iron 17 g/L with initial pH 1.8. A verification test indicated that Fe 2+ oxidation rate was 6.1 g/(L·h), which was better than the results obtained in previous experiments. At the same time the precipitation formed is very small compared with all the experiments. So the liquid mixture may apply in this chemical-biological process better.
A mesh partition based explicit integration method for dynamic structure FEA is proposed in this article. With this method, the whole finite element mesh is partitioned into several zones according to the elements increment feature size, and then variable time increments are applied to the mesh zones for explicit integration while the parameter transfer and interpolation is performed over the interfaces to ensure the continuity. This method has the capability of boost the analysis efficiency without much precision loss to the analysis results of interested zones, which is proven by some 2D analysis examples.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.