The document discusses the process commissioning of wastewater treatment works across multiple sites in Huddersfield. It outlines the scope of works including installing new activated sludge process lanes and tanks at Lower Brighersfield, new sludge treatment facilities at Calder Valley, and decommissioning biological filters and tanks at Cooper Bridge. It provides details on commissioning the new activated sludge process and sludge treatment works, and decommissioning the existing biological filters at Cooper Bridge over the period of July to October 2009.

1. Huddersfield WwTW – FFD Process Commissioning

2. 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 A62 Railway Railway

3. River Calder Lower Brighouse Inlet PS Huddersfield Complex 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

4. 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

6. 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

7. Cooper Bridge – Scope of Works Filter beds and humus tanks to be moth-balled

8. 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

9. Process Commissioning Areas for process commissioning For De-commissioning Biological Filters (Cooper Bridge) De-commissioning of the biological filters De-commissioning of the humus settlement tanks

10. 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 Selector X X

11. Process Commissioning – Activated Sludge Process Sludge from sludge tanks to “seed” the activated sludge lane at 500m 3 /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 Selector X Aeration Activated sludge lane Final Settlement Tank Selector Aeration Activated sludge lane Final Settlement Tank Selector Seed Sludge X

12. 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 Selector Seed Sludge

13. 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

14. 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

15. Timescale Construction complete July 2009 Process commissioning July 2009 Completion date October 2009

16. ANY QUESTIONS ?