Marsh Ultra:Polylok L Sewage Treatment Plant 6-12PE

The Marsh UPL brings industrial experience to domestic sewage treatment, combining proven performance with simple, easy-to-manage operation.

Drawing on Marsh Industries’ expertise in industrial and commercial sewage treatment, the UPL delivers reliable performance and cost-effective engineering for domestic applications.

Available in 6PE and 12PE models, the Marsh UPL is approved to BS EN12566-3 and provides treated effluent quality of approximately 20:30:20 mg/ltr (BOD:suspended solids:ammonia), meeting national consent standards.

Key features

• Tested and approved to the most stringent European Standards: EN12566-3: 2005+A1:2009

• Small footprint and shallow dig for easy installation provides enhanced health and safety benefits

• Heavy duty shell as standard enables installation in all ground conditions. Unique ‘keying-in’ lip assists anchoring into granular or concrete surrounds

• Near silent, energy efficient compressor (located externally) with integral alarm (approximate annual running costs of £35 p/annum)

• High specification bio-media (310m3 per m2) and membrane diffuser ensures even circulation and maximum treatment efficiency

• Unique Polylok tertiary filter reduces suspended solids and BOD by a further 40% helping to extend drainage field life

• Sludge return pipe improves system circulation

• Variable inverts for ease of installation at various depths – 250, 500 and 750mm risers available

• Pumped outlets available

Operating Principle

The UPL uses a similar operating principle as the Marsh:Ensign. In addition to anaerobic digestion taking place in the primary settlement chamber the UPL unit allows the clarified water to pass into a second ‘aeration’ chamber where it is treated to remove the dissolved constituents. Here aerobic bacteria, supported by diffused air and mobile media, ensures full treatment is achieved before the treated effluent and ‘sloughed off’ bacteria flows to a final settlement chamber. The final effluent is then discharged to the drainage field or watercourse via a Polylok filter.