The Island of Jersey, with a population of 87,500 relies on one main waste treatment plant, so for proven reliability, Watson Marlow Bredel pumps are chosen for critical sludge pumping duties.

The Island of Jersey, with a population of 87,500, relies on one main waste treatment plant in the town of St Helier, the Bellozanne Depot. Here, all solid waste, and liquid waste from the 110 pumping stations is treated. For a small island with limited space and high dependence on one site, the States of Jersey Public Services Department needed to be sure of a totally reliable and effective pumping solution that could deal with the peaks and troughs of the holiday season and operate 24/7 - so they turned to Watson-Marlow Bredel.

Over the years, Public Service Stores, part of the Jersey Government, have grown to trust a high level of service, quality and performance from Watson-Marlow Bredel peristaltic pumps and hoses.

The Bellozanne Depot uses Watson-Marlow Bredel SP100 high flow, high-pressure hose pumps for primary sludge transfer and digester feed.

Matthew McNulty, Purchasing Office for Public Service Stores comments: 'With increasingly stringent levels of discharge consent and the need to constantly reduce operating costs, these critical processes must be carried out reliably.

That is why we have continued to use Watson-Marlow Bredel pumps over the last 20 years.

They provide consistent and accurate performance and are self-priming and dry-running.' The six SP100 pumps at Bellozanne Depot feed sewerage from settlement tanks into digesters, where all the methane gas is used as an energy source for other processes.

The sludge is then moved to a drying plant where the moisture is removed and the remainder made into pellets.

The remaining finer effluent goes on to be completely processed in the secondary treatment and ultra violet plants.

Philip Bolton, Business Development Manager from Watson-Marlow Bredel explains the benefits of peristaltic pumps in sewerage treatment.

'With traditional positive displacement technology such as progressive cavity pumps, operating costs are very high.

When pumping abrasive sludge there is excessive wear on stators and rotors, and the cavity design also means that fluid cannot be pumped as quickly or effectively.

By adopting peristaltic technology, these problems are eliminated.

The use of reinforced hoses that can easily be replaced also eliminates downtime associated with mechanical failure and the pumps are considerably cheaper to maintain.' Designed for continuous operation at pressures up to 16 bar/220 psi, the SP100 can easily handle most sewage treatment applications.

The simple glandless 'straight through' construction without valves, vanes or impellers can deal with heavy-duty waste treatment substances, including viscous and abrasive sludges and slurries, and other solid and semi solids.