ARM Ltd was approached by Highland Spring to assess the existing wastewater treatment system at their Blaen Twyni site in the Brecon Beacons. The site produces flavoured drinking water supplying numerous retail outlets including supermarket chains. Borehole water is drawn from the ground on site processed and bottled prior to distribution. Flavourings and preservatives are added during production and acids, alkalis and oxidising agents used for plant cleaning processes. The waste water collected on site is a combination of product, cleaning fluids, raw water and acid/alkali for pH balancing.