Aplikace bakterií acidithiobacillus ferrooxidans při flotací uhlí.

Abstract

The leading position of coal as a fossil fuel is given relatively equal distribution of its resources on all continents. In the 90th of the last century there was a decline in all types of coal mining, but now this energy source again attracts our attention. The rate of attenuation in the coal mining depends on the development of international and national conditions. The performance of an international agreement on the gradual reduction of sulfur oxides emitted into the atmosphere is an important factor which this affects. Substances that are released into the atmosphere by burning fossil fuels bring numerous environmental, technical, and economic problems. Set of technologies that deals with this problem is called "Clean Coal Technology". The question is how to solve these problems. One option is the most advanced processing of mined coal and maximum use of flammable components. This trend poses new tasks in Mineral Processing: process and comprehensive use of coal finest fraction, which arise in the processes of coal treatment. Technological procedures of preparation of mineral and secondary materials, which can deal with rational and comprehensive utilization of mineral resources, are the flotation, flocculation, or its combination flotoflokulation. My work deals with the influence of microorganisms Acidithiobacillus ferrooxidans on the flotation samples of black and brown coal. I examine bioflotation method, which can be classified as one of the technologies, which are called "Clean Coal Technology". The aim of the experiments will assess which effect have bacterium Acidithiobacillus ferrooxidans on the ash and sulfur content in coal samples after different exposure time in the flotation pulp (15 minutes - 7 days).