Peristaltic pumps bring sustainability benefits to mine’s water treatment plant скачать в хорошем качестве

Peristaltic pumps bring sustainability benefits to mine’s water treatment plant

When metal-rich, contaminated minewater enters rivers it damages the ecology by reducing fish populations and the diversity of invertebrates. As well as damaging biodiversity, polluted riverways also have a negative economic impact on tourism and leisure activities. But a water treatment plant (WTP) at a mine site, like the one at South Crofty tin mine in Cornwall, England, pumps up minewater from underground shafts and decontaminates it before discharging the water into a nearby river. Cornish Metals Inc. is working to reopen South Crofty, which ceased producing tin in 1998, by the end of 2026. To fully dewater the mine, approximately 8 million cubic metres of water will need to be pumped and treated to a standard set by the environment agency. Cornish Metals is using eight Bredel 40 hose pumps and three Qdos chemical metering and dosing pumps from Watson-Marlow Fluid Technology Solutions (WMFTS) for vital roles at its South Crofty WTP. Reliable, low-maintenance pumps Three Qdos 120 pumps are accurately dosing hydrogen peroxide during the cleaning of contaminated minewater, to oxidise the metals and cause iron and arsenic to precipitate out of the solution, in the first of five process steps at the WTP. Bredel hose pumps provide reliable, low maintenance and contained transfer of thick sludge (containing contaminants such as iron, manganese and arsenic) which is separated from the treated water in stages two and four. The Bredel Pumps transfer excess sludge from Lamella calrifiers, into a holding tank, from which a further Bredel pump pumps the sludge into a Deep Cone Thickener (DCT). The thickened sludge from the underflow of the DCT is pumped by a final Bredel pump into a holding tank, prior to disposal at a nearby tailing storage facility. In future years it is planned that the sludge will be disposed of with tailings in the form of paste fill in the underground voids of the mine.