The Kubota Submerged Membrane Process The Future of Sewage and Effluent Treatment ?

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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

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Principle of Operation
In
Out
Screened crude sewage
Treated disinfected effluent
Waste Sludge (to further treatment)
Air in
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Membrane Filtration
Solids
Virus
Air
Treated effluent
Bacteria
Membrane
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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
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Porlock Aeration Tank MLSS
Feb 98 - Sept 99
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Porlock BOD Removal
Feb 98 - Jan 00
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Porlock NH3/4 Removal
Aug 98 - Apr 99
No ammonia consent No dissolved oxygen control
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Porlock Faecal Coliforms
Feb 98 - Jan 00
Sampling contamination identified
Intensive sampling periods
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Porlock Faecal Coliphage Virus
Feb 98 - Jan 00
Change of test procedure
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Porlock Final Effluent Turbidity
Turbidity meter set up incorrectly - readings
higher than actual
Feb - June 1998
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Porlock STW- Compliance Results
Kubota Submerged Membrane Process
June 1998 November 1999
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