Thames Water chooses Mono muncher

Thames Water has installed the high-performance TR Muncher from Mono NOV, to improve efficiency at Bracknell sewage treatment works by preventing pump blockages and minimising downtime.

Bracknell sewage treatment works features seven primary sludge tanks, which, due to the high rag content of the sludge, caused frequent maintenance, cleaning and equipment repair.

Thames Water specified Mono's TR Muncher, which macerates heavy solids and rags to a small particle size to protect the plant's process equipment.

The installation of the TR Muncher, together with the relocation of the existing Mono Munchers on the site, was undertaken by Mono's projects and installation team, and included mechanical and electric installation, commissioning and handover.

The TR Muncher, which has a capacity range of 0-500m3 per hour of raw sewage, features twin-shaft grinders and is designed specifically for the efficient treatment of abrasive sludges.

The differential speed of the cutter stacks pulls apart fibrous material, whilst the leading edge and sides of the cutter teeth crop and shear other materials, such as plastic, into small pieces.

The circumferential 'land' of the cutter crushes friable or brittle material.

The layback cutter shafts on the TR Muncher are set at an angle to the incoming flow.

This more effective design allows the Muncher to capture irregular-shaped objects and, if a reverse cycle occurs, the object is automatically dropped into the built-in trash trap, which is set clear of and below the cutter stacks, retaining the solids away from the cutters.

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