Project Description
Alderley Edge Sewage Treatment Works (STW) is a medium sized activated sludge plant (ASP). In AMP7, under the Water Framework Directive (WFD), the site has to meet a new total phosphorus (TP) consent of
0.3 mg/l, and an Iron consent of 4 mg/l. To achieve these new consent standards, United Utilities installed a FilterClear® plant.
The decision was based on a comprehensive whole life cost (WLC) assessment of various tertiary solids removal (TSR) plants. The FilterClear® skid was assembled and hydraulically tested off-site at Bluewater’s works, before being transported to site for installation on a
flat concrete slab.
The site was commissioned with Ferric dosing for P removal, and the FilterClear performance demonstrated that the compliance can be achieved reliably.
| Project Name: | Alderley Edge |
| Client: | United Utilities |
| Capacity: | 108 L/s |
| Main Contractor: | C2V+ |
| Project Scope: | Design, supply & commission |
Project Highlights
- Off-site manufacture
- Consent of 0.3 mg/l TP and 4 mg/l Fe
- Rapid installation and commissioning
- No separate flocculation tank needed
Scope of Works
Design, procurement, manufacture, installation and commissioning of Bluewater Bio’s proprietary FilterClear® 4V2800 plant. Fully automated and instrumented tertiary filtration system for Total Phosphorus removal.
Project Duration
Client Contact
Client organisation: United Utilities
Alderly Edge STW Process Parameters
| Average flow | 81 l/s |
| Maximum flow | 150 l/s |
| Design Influent TSS conc. (incl. chemical solids) | 16 mg/L (average) 34 mg/L (98%ile) |
| Effluent TP consent | 0.3 mg/L (average) |
| Effluent Fe consent | 4 mg/L (95%ile) |
