Bayannaoer mine coal mine effluent of sewage treatment equipment sources and water quality characteristics of coal mine waste water include: coal mining process underground geological sexual Bay seepage to the roadway natural groundwater discharge to safe production, underground coal mining production process sprinkler dustfall , fire fighting the grout, Fire and hydraulic equipment containing coal dust sewage. Coal mine effluent characteristics are as follows: Mine sewage water quality and quantity changes in the larger, lower concentration of pollutants, coal mine wastewater biodegradability good to deal with a small degree of difficulty. Different coal mine water quality, the water quality and there are significant differences in the ordinary surface water and groundwater quality, and has the characteristics of the coal industry, are: 1), significantly higher than the surface of the coal mine effluent suspended solids content water, and very unstable, and sensory properties. 2), suspended solids particle size is small, light weight, and slow sedimentation velocity, the smaller diameter of the suspended particles of the mine water, an average of only 2 ~ 8um, a particle diameter of more than about 85% of the total suspended matter in general the average density of the pulverized coal in 50um or less; only 1.3 ~ 1.6g/cm3, significantly less than the average density of the surface water sediment particles 1.9 ~ 62.6g/cm3. 3), containing the pollutants. Surface water generally does not contain organic matter addition to pulverized coal itself is organic matter in the coal mine wastewater, water bodies also contain small amounts of waste oil, emulsified oil, rotting waste pit prop, underground feces and other organic matter. 4), coagulation process alum formed difficulties, poor settlement. 5), the mine sewage coal is only suspended solids, not oxygen-consuming organic pollutants. Different mine water containing suspended solids CODcr differences, but CODcr is due to the reduction of the organic carbon molecules in the cinder, it generally needs to be carried out biochemical treatment.