Mine water treatment for SUEK coal mine
EnviroChemie provided the plant technology for mine water treatment with water recycling for a coal mine for SUEK, one of Russia’s largest coal producers.
For SUEK, EnviroChemie's industry experts developed a mine water treatment plant for direct discharge. Some of the treated water can be reused in the plant. EnviroChemie's services covered all the planning, the supply of mechanical and electrical equipment, and assembly and commissioning.
The pit water produced as a result of coal extraction is contaminated with suspended coal particles, heavy metals and oil products. SUEK was looking for a suitable technological solution to sustainably treat the mine water from coal production, discharge it into the river in accordance with official regulations and reuse some of the water in the mine. The company also wanted to cut costs for water treatment and disposal at the same time.
The Envochem® mine water treatment for the coal mine was designed as a two-line system, where each line has a hydraulic performance of 200 m³/h. Coagulation, hydrophobisation of the coal particles and flocculation is carried out in the three flow-through reactors. The subsequent separation of the flocculated solids is carried out with Flomar® flotation plants. The separated sludge is dewatered using a filter press and then disposed of. As a final purification stage after flotation, the wastewater is cleaned using disc filters and discharged into the river after UV disinfection.
The main benefits of the plant technology are a high level of operational safety and a large degree of tolerance to changes in wastewater volume and composition. Since the new mine water treatment plant with sludge treatment has been in operation, SUEK no longer needs a 13-hectare site that was previously used as a sediment reservoir.
Part of the treated mine water will be recycled and reused as process water in production.
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