Discam Units Help Protect Pumps in China

NOV Mono (UK) have recently installed a trio of pumps at a major sewage treatment site in China. The three Discam units have been installed in the Fujian Province city and join NOV Mono's grinder and screen technology. Ultimately this will offer a highly effective and low maintenance alternative to conventional pump protection solutions.

This project has been driven by Suzhou Dayu Water Treatment Company, who have previous NOV Mono cavity pumps at their facitilies. The previous reliable service NOV Mono has supplied was a key consideration when deciding whether to install the new Discam units. The Discams have been installed at the inlets to the three pumping stations, where they now screen and grind solids in order to protect the large submersible pumps which are used downstream.

“Packaged systems such as Discam are ideal for this type of application,” says NOV Mono’s Business Manager for Waste-Tec products, Ian Hallows. “By screening and macerating solids in a single operation they can create major benefits in wastewater treatment processes. Operating efficiency is increased, while the cost of cleaning plus onward handling and disposal are significantly reduced. The Discam units can be installed in both existing or new-build facilities and this makes them suitable for almost any type of wastewater facility.”

The Discams themselves include rotating shafts with intermeshing discs fitted to them. They gently spread soils and debris across the face of the screen to the cutter stacks. These are fitted with interleaving cutters and spacers that create a ‘positive displacement’ action to grind the captured solids. Once the solids have been macerated to a small particle size they are retained in the main flow for further processing or subsequent removal. The Discams need no manual cleaning and they eliminate the disposal costs associated with debris extracted by traditional screening processes. The Discams also features a hi-flow side rail which increases the fluid velocity through the Muncher and helps ensure low wear, noise and vibration performance.