Coal sewage treatment equipment coal mine effluent sources and water quality characteristics of coal mine wastewater include: the process of coal mining in underground geological Bay water to a roadway for the safe production of natural groundwater discharge, underground coal mining production process sprinkler, dust, fire fighting grouting Fire and hydraulic equipment containing coal dust sewage. Coal mine effluent characteristics are as follows: coal mine effluent water quality and quantity changes, low concentration of pollutants, coal wastewater biodegradability processing difficulty. Coal mine water quality are very different, there are significant differences between the water quality and ordinary surface water and groundwater quality, the coal industry has obvious characteristics are: 1) coal mine effluent suspended solids content was significantly higher than the surface water, and is very unstable, poor sensory properties. 2), suspended solids particle size is small, light weight, slow sedimentation rate, mine water suspended particles of smaller diameter, an average of only 2 to 8um, more than approximately 85% of the total suspended solids particle size of less than 50um; the average density of the pulverized coal Average only 1.3 to 1.6g/cm3, significantly less than the average density of the surface water, sediment particles the 1.9 to 62.6g/cm3. 3), containing contaminants. Surface water generally does not contain organic matter in the coal mine wastewater, in addition to the pulverized coal is from organic matter, water bodies also contain small amounts of waste oil, emulsified oil, rotting waste the mine timber Underground manure and other organic matter. 4), the coagulation process alum formed difficulties, poor settlement. 5), coal sewage pulverized coal is only suspended solids, not the oxygen consumption of organic pollutants. Mine water containing suspended solids CODcr large differences, but the CODcr are caused due to coal dust in the reduction of the organic carbon molecules, it is generally need to be biological treatment.