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Located in Exmoor National Park, with nearby bathing beach

Porlock Sewage Treatment Plant. Site data. Located in Exmoor National Park, with nearby bathing beach 3800 population equivalent (summer) 1900 m 3 /d flow to full treatment Sewage feed started 12th February 1998. Principle of Operation. In. Out. Screened crude sewage.

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Located in Exmoor National Park, with nearby bathing beach

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  1. Porlock Sewage Treatment Plant Site data • Located in Exmoor National Park, with nearby bathing beach • 3800 population equivalent (summer) • 1900 m3/d flow to full treatment • Sewage feed started 12th February 1998

  2. Principle of Operation In Out Screened crude sewage Treated & disinfected effluent Waste Sludge (to further treatment) Air in

  3. Membrane Filtration Solids Virus Air Treated effluent Bacteria Membrane

  4. Porlock Treatment Building Permeate Pumps 4. Aeration Tanks 1 - 4 2. Crude Effluent inlet Tidal Storage Fine Screens 3 mm Final Effluent out Anoxic recycle Tank Blowers 1. 3. Washing Tank Membrane Units

  5. Porlock Aeration Tank MLSS Feb 98 - Sept 99

  6. Porlock BOD Removal Feb 98 - Jan 00

  7. Porlock NH3/4 Removal Aug 98 - Apr 99 No ammonia consent No dissolved oxygen control

  8. Porlock Faecal Coliforms Feb 98 - Jan 00 Sampling contamination identified Intensive sampling periods

  9. Porlock Faecal Coliphage Virus Feb 98 - Jan 00 Change of test procedure

  10. Porlock Final Effluent Turbidity Turbidity meter set up incorrectly - readings higher than actual Feb - June 1998

  11. Porlock STW- Compliance Results Kubota Submerged Membrane Process June 1998 – November 1999

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