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Zero mine water discharge
Zero mine water discharge
Mine water characteristics
Mine water is the external drainage of mineral extraction process. In the mining process, a series of physical, chemical and biochemical reactions occur between the groundwater and the ore layer and rock layer, and the toxic substances in the ore layer and rock layer enter the mine water, which will pollute the water body and destroy the ecological environment if it is not treated directly. Due to the influence of environment, climate or region, mine water varies from mine to mine, and from mine to mine, so it is necessary to choose mine water treatment methods according to local conditions to improve the utilization rate and treatment effect of mine water. Recently, mine water is generally treated by membrane concentration technology, and the membrane produced water can reach a good level for plant reuse, but the salt content of concentrated water is high, and the concentration of impurity ions is also enriched in the concentrated concentration is high, so the evaporation treatment process is used for the final concentrated water treatment.
Mine zero discharge treatment process
Mine water - ultrafiltration - reverse osmosis - high pressure reverse osmosis - 1 # MVR evaporation system - 2 # MVR evaporation system
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Sodium Sulfate Salt Mixed Salt
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Name |
Introduction |
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Project Name |
A mine water zero discharge treatment project in Yunnan |
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Project Address |
Yunnan |
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Industry of wastewater treatment |
Zero Discharge Mine Water Project |
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Treatment process |
Mine water - reverse osmosis - high pressure reverse osmosis treatment - preheating system - MVR evaporation and concentration - crystallization system |
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Raw water quality |
Raw water index: raw water PH:8.82; density 1.002g/ml; COD: 200mg/L; salinity: 1.02%; hardness: 90mg /L (in terms of calcium ions); |
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Process Introduction |
Mine water zero discharge treatment contains membrane treatment, evaporation crystallization and other wastewater treatment processes, raw water after RO reverse osmosis and DTRO high-pressure reverse osmosis, produced water returned to the workshop for medium water reuse, concentrated water into the evaporation crystallization section, in the evaporation crystallization section, brine separation, evaporation condensate for reuse, crystallization salt shipped out for treatment, which. The whole system is free of any external pollutants except the filter sludge and crystallization salt from the softening system, which are all recycled and used. | |
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Project Photos |
Project water intake |
Project water discharge |
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Project Operation Cost |
Membrane concentration section cost per ton of water: 1.93 RMB/ton of water Evaporation section ton of water: 53 yuan / ton of water Comprehensive treatment cost: 2.34 yuan/ton of water |
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Zero mine water discharge
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