Project Description
Winscombe Sewage Treatment Works (STW) is a
small trickling filter works. In AMP7, under the Water
Framework Directive (WFD), the site has to meet a total
phosphorus (TP) consent of 0.5 mg/l, and an Iron consent
of 4 mg/l. To achieve these new consent standards,
Wessex Water 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: | Winscombe STW |
| Client: | Wessex Water |
| Capacity: | 25 L/s |
| Project Scope: | Design, supply & commission |
Project Highlights
- Off-site manufacture
- Consent of 0.5 mg/l TP and 4 mg/l Fe
- Rapid installation and commissioning
- No separate flocculation tank needed
Scope of Works
Project Duration
FilterClear delivered: October 2021
Installation time: ~2 weeks
Commissioning time: ~2 weeks
Client Contact
Client organisation: Wessex Water
Contact person: Andrew Gulliford (Process Manager)
Winscombe STW Process Parameters
| Average flow | 16 L/s |
| Maximum flow | 25 L/s |
| Design Influent TSS conc. (incl. chemical solids) | 64 mg/L (average) 73 mg/L (98%ile) |
| Effluent TP consent | 0.5 mg/L (average) |
| Effluent Fe consent | 4 mg/L (95%ile) |
