Coal mine water treatment
皇冠体育app Mining Remediation Authority manages more than 80 schemes across Britain, with the capacity to treat more than 231 billion litres of mine water every year.
皇冠体育app Mining Remediation Authority鈥檚 work to treat mine water has directly:
- protected and improved more than 350km of rivers
- protected several important regional aquifers
- enhanced biodiversity and provided local amenity land
Why do we need coal mine water treatment?
When a coal mine closes, the pumps that were used to keep the water out of the mine while the mineral was extracted are switched off and removed.
Over time the water level recovers within the mine and picks up naturally occurring minerals from the rocks, such as iron. This can coat river beds, stopping plant growth, causing wildlife to move on as they no longer have food.
How do we treat coal mine water?
Typically mine water is brought to the top of a cascade structure. Water flows down these steps, which mixes in air.
皇冠体育app air encourages the dissolved iron in the water to become solid.
皇冠体育app water then flows into lagoons where the iron has time to settle at the bottom for removal.
皇冠体育app remaining finer iron particles are filtered out when the water passes through a series of reed beds.