Mono® Muncher® in the Pipeline for United Utilities

A drive to find a more reliable and cost effective solution to safe handling of untreated sewage has led United Utilities to install Mono Pumps' pipeline TR Muncher at its Blackburn wastewater treatment works.

Prior to the installation, United Utilities was experiencing equipment

blockages, caused by a high percentage of rag content in the sludge,

imported by road tankers from outlying rural treatment works. Inlet screens

had been installed to protect the equipment from blockages, but they

provided only a partial solution.

The twin shaft, low speed, TR Muncher is installed on the tanker discharge

pipeline, connected to a centrifugal pump and is reducing turnaround time on

off-loading by preventing blockages.

Macerating the primary thickened sludge at a rate of 70m3/h, the twin shafts

operate at different speeds, promoting a tearing action on the solids,

whilst the low cutter tip speeds ensure maximum efficiency and minimum noise

levels. The layback cutter stacks are set at an angle to the incoming flow

to reduce the possibility of damage by rogue materials, any rejected

material drops clear of the shafts. These features are some of the low

maintenance advantages of the unit. Moreover, the pull out cutter stack

allows easy removal without disturbing the pipeline.

The design of the Muncher incorporates an intelligent auto reverse sequence

controller, which enables the Muncher to unblock itself and restart

automatically, without the need for the tanker drivers to intervene.

Mono provided a single source solution, manufacturing, supplying and

installing the equipment. Their after-sales service, that includes a very

efficient maintenance and Service Exchange Program, was also an added

benefit to the customer.

For further information on Mono’s range of products, please visit, or contact Debbie Wharmby, Mono Pumps,

Tel 0161 339 9000, Fax 0161 343 7340

Action inspires action. Stay ahead of the curve with sustainability and energy newsletters from edie