Treatment Method of Acid Mine Drainage Using SRBSulfate Reducing Bacteria and the Process of AFRMAnaerobic Floating Media Reactor

摘要

Acid mine waste water resulting from oxidation of the ground water and the mineral oxide is it contains a low pH, high heavy metal sulfates such as (SO ₄^2-) and the concentration of iron, manganese, zinc, copper at a high concentration close to the acidified water and in water thereby killing the microbial habitat, birds, and fish are. In addition, severe damage to the rock, mine waste, by reaction as the concrete sikimyeo erode the structure, by dissolving the human body and organisms (such plants, microorganisms, etc.) harmful toxic metals (copper, zinc, cadmium, manganese, lead, and so on) the environment so causing the destruction of the ecosystem, there is a need to bring such appropriate measures for this; Thus, the present invention is a variety of heavy metals present in these acid mine drainage sulfate-reducing bacteria; were to be removed by using the (Sulfate Reducing Bacteria than SRB), a conventional method which is different from Shin anaerobic process in the removal of these heavy metals AFMR ( anaerobic floating media reactor; developed an anaerobic reaction vessel floating media) treatment step, this treatment step may belong to the field of waste water in any high level waste water treatment technology is applicable for containing various heavy metals.; Physical and chemical processes have been used to remove heavy metals from the environment, but these conventional methods have the disadvantage that the second generation and heavy metal removal rates and high costs of operation of the low efficiency of the pollutant costs. Accordingly, there is a study of the heavy metal removal technology is going on in various ways around the world, the present invention is an anaerobic treatment step of sulfate-reducing bacteria (SRB) existing in these physical and chemical methods, and is a different biological heavy metal removal technique It can be referred to as heavy metal removal process using.; These sulfates heavy metal removal using a reducing bacteria (SRB) process organic matter to by using as an electron donor sulfide generated when the reduction of the sulphate (Sulfate) to the sulfide (Sulfide) (Sulfide) is reacted with various heavy metals present in the waste water sulphide by forming the precipitation (precipitation Sulfide) utilizes the reaction mechanism of removing the heavy metals in biological. This makes it also suggests the possibility of recovery of heavy metals from waste water, as well as the removal of heavy metals, according to the characteristics of the waste water from the waste water. The heavy metals are removed in the same way sulfide is low there is a risk of re-eluted by changing the carbon dioxide and bicarbonate, the organic carbon source in anaerobic digestion since thereby resulting in increasing the alkalinity of the heavy metals from waste water of the coal and metal mines and contains a large amount of sulfate It was an effective way to remove.; The present invention up filling the Floating Media in-flow anaerobic reactor; stylized (AFMR Anaerobic Floating Media Reactor), and the strain of the In sulfate-reducing bacteria the surface of the Media filled in the anaerobic reactor to form the biofilms (biofilm), thus formed SRB biofilms (biofilm) by using an organic substance as an electron donor sulphate (SO ₄⁼⁾ sulfide (S ⁼⁾ the formed sulphides are present various heavy metals react with the metal sulfide precipitate (metal sulfide Precipitation) which in the acid mine drainage by reduction with to remove the heavy metals by forming.; As was the effect of the present invention, the generation of secondary pollutants small compared to traditional heavy metal treatment method, it is not only possible to obtain a high removal efficiency of heavy metals can be economically reduce the number of operating costs.