Peristaltic technology offers benefits over rotor and stator pumps at Bamford WTW. Process Engineers at a Severn water treatment works (WTW) are benefiting from accurate chemical dosing, reduced maintenance and reliable operation thanks to the replacement of rotor and stator pumps with peristaltic technology. The peristaltic pumps, supplied by specialists, Watson-Marlow Bredel were installed at Bamford Water Treatment Works as part of a project to optimise performance at the site. The water treatment works at Bamford, near the historic Derwent Water Reservoir, pump 160 megalitres of water per day. Water from the works enters a large aquaduct, which flows down from North Derbyshire through Nottingham into Birmingham. An integral part of the water treatment process at Bamford is the addition of lime slurry, to control the pH of the water. Water entering the works is dosed with ferric sulphate and a polyelectrolyte and brought to a pH of between 4.7 and 5.1. If the water is lower than this pH, it is dosed with lime in order to bring it up to the required level. The water is then fed from the clarifiers onto a bank of RG filters. At this stage Sodium Hypochlorite is added as a disinfectant.
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