huddersfield process commisioning presentation
TRANSCRIPT
Huddersfield WwTW – FFDProcess Commissioning
Huddersfield Complex
Cooper Bridge
Upper Brighouse & Calder Valley
Heaton Lodge
A62
Deighton
Lower Brighouse
Colne Bridge & Bradley
A644
River Colne
River Calder
Calder & Hebble Navigation Canal
A62Railway
Railway
River Calder
Lower Brighouse Inlet PS
Upper Brighouse SBR
Heaton Lodge Filter
Beds
Cooper Bridge Filter Beds
Colne Bridge BAFF
Deighton Primary Tanks
Lower Brighouse Sand Filters
Brighouse Catchment
Heaton Lodge Humus Tanks
Huddersfield Catchment
Cooper Bridge Humus Tanks
River Calder
Lower Brighouse New ASP
Lower Brighouse New FSTs
Lower Brighouse New
Selector
15%
55%
70%
30%
Down-rate Heaton Lodge
Optimise Colne Bridge
Close Cooper Bridge
Huddersfield Complex
Lower Brighouse – Scope of Works
• Selector Tank• 4 Lane ASP Works • 4 Final Settlement Tanks (40m diameter)• RAS/SAS Pumping Station• Associated pipework to connect to the
existing system
Calder Valley – Scope of Works
• New SAS tanks with associated pumping station
• New thickening units consisting of drum thickeners to fit into existing belt thickeners building
Cooper Bridge – Scope of Works
• Filter beds and humus tanks to be moth-balled
Process Commissioning
Areas for process commissioning– Activated sludge process (Lower Brighouse)
• Selector• Activated sludge plant lanes• Final settlement tanks• RAS/SAS Pumping station
– Sludge process (Calder Valley)• Sludge balancing tanks• Drum thickeners and associated processes
Process Commissioning
Areas for process commissioningFor De-commissioning
– Biological Filters (Cooper Bridge)• De-commissioning of the biological filters• De-commissioning of the humus settlement tanks
Process Commissioning – Activated Sludge Process
• First ASP lane and all final settlement tanks filled with main flow.• When ASP lane ½ full start aeration• Main flow switched off• Drop bell-mouths to lowest level in FST’s and circulate at minimum
scour rate
Aeration
Activated sludge lane
Final Settlement
Tank
Sel
ecto
r XX
Process Commissioning – Activated Sludge Process
• Sludge from sludge tanks to “seed” the activated sludge lane at 500m3/day from Calder Valley
• Once ASP lane is acclimatised start to add flow at a rate of 145L/s.• Effluent to be over-pumped to Cooper Bridge via the sand filter
backwash tank until effluent is of good enough quality for discharge.
Aeration
Activated sludge lane
Final Settlement
Tank
Sel
ecto
r X
Aeration
Activated sludge lane
Final Settlement
Tank
Sel
ecto
r
Aeration
Activated sludge lane
Final Settlement
Tank
Sel
ecto
r
Seed Sludge
X
Process Commissioning – Activated Sludge Process
• Successively bring ASP Lanes into service whilst maintaining an F/M ratio of 0.07
• When flows increase to greater than 250 L/s then start to de-commission Cooper Bridge filters
Aeration
Activated sludge lane
Final Settlement
Tank
Sel
ecto
r
Seed Sludge
Process Commissioning – Biological Filter De-commissioning
• De-commissioning of the filters at Cooper Bridge• To be co-ordinated with the ramp up in flow of the ASP (commences
once flow to ASP lanes increases above 250L/s• Filter beds to be taken off-line as the flows and loads to ASP is
increased• Isolate filters once flows have stopped• Once isolated spray with insecticides to prevent future fly nuisance
• Potential Problems– Maintaining Wetting Rates on Biological Filter– Fly nuisance during and after de-commissioning– Odour Nuisance
Process Commissioning – Sludge treatment works (Calder Valley)
• Pre-commissioning tests with SAS to make sure the system is operating correctly
• To commence once the ASP is producing SAS• Pumps for calibration
– Sludge transfer pumps
– Polymer transfer pumps
– Polymer dosing pumps
• Drum thickeners– Tests to identify optimum polymer dosing rate of sludge (blend of CASS,
SAS and Syngenta sludges)
– Series of trial runs to check and optimise operation of drum thickeners
Timescale
Construction complete July 2009
Process commissioning July 2009
Completion date October 2009
ANY QUESTIONS ?