Ecological treatment method for acid mine water of coal mine

Abstract

The invention discloses an ecological treatment method for acid mine water of coal mine. The method comprises a pool or a pool group, a pond or a pond group and a wetland which are connected in series; a fine particle limestone filter material is arranged at the pool or the pool group, and the diameter of fine particles d is at most 3.0mm; the depth of the pool or the pool group is 3-10m, and the area of the pool depends on processed water quantity and water quality; processing 1000m3 / d of water needs the area of 10-30m2, and water flow passes through the filter material from bottom to top; thiobacillus ferrous oxide is put in the pond or the pond group, and the depth of the pond or the pond group is more than 1m; the area of the pond depends on processed water quantity, and processing 1000m3 / d of water needs the area of 50-100m2; the water temperature is 28-30 DEG C, the pH value is 2.0-2.3, and the quantity of strain inoculation is 10 percent; the water flow smoothly flows through the pond, and the flow speed is smaller than 0.2m / s2; water-resisting plants such as reeds, Typhaangustifolia or willows and the like are planted in the wetland; the area of the wetland depends on processed water quantity, and processing 1000m3 / d of water needs the area of 1000-2000m2; and the water flow slowly flows through the wetland, and the flow speed is smaller than 0.05m / s2. The method comprehensively applies a neutralization method, a bacterial method and a wetland method and utilizes the respective characteristics to process acid waste water with any concentration and any properties.

Description

Technical field [0001] The invention relates to the field of environmental management and mining, in particular to a coal mine water treatment process. The invention comprehensively uses neutralization method, bacterial method and wetland method to remove sulfate ions, ferrous ions and heavy metal ions in acid wastewater, and can treat acid wastewater of any concentration and any nature. Background technique [0002] Coal accounts for more than 70% of my country's energy structure. The environmental problems caused by coal mining and utilization are very serious, and water pollution is one of the prominent environmental problems. Water shortage has affected the lives of residents in mining areas and the normal production of coal mines, and has restricted the continuous and stable development of the coal industry. According to the survey, 70% of coal mines in the north are short of water, 40% are severely short of water, and the per capita domestic water consumption is less than ...

AI Technical Summary

Problems solved by technology

[0006] Acidic mine water not only corrodes underground drainage equipment and other mining equipment, causing economic losses, but also affects the health of underground workers; the concentration of some heavy metal ions in acidic mine water increases with the increase of acidity, and the toxicity also increases, causing potential harm to organisms , when using untreated acidic mine water for irrigation, it can destroy the aggregate structure of the soil and affect the crop yield

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