Project Description
Brockhampton STW is a medium sized activated sludge works treating the Cheltenham catchment, comprising domestic sewage, trade effluent and the effluent from
the Cheltenham race course. The works treats a FFT of 105 l/s. The consent limits are: TSS 25 mg/l, BOD 15 mg/l, AmmN 5 mg/l.
In AMP6, under the Water Framework Directive (WFD), the site has to meet more stringent standards, including
a new total phosphorus (TP) consent of 0.25 mg/l, and Fe of 4 mg/l. To achieve these new consent standards, Costain (Severn Trent’s main contractor) installed a chemical dosing facility and a FilterClear® plant. The decision was made based on a comprehensive whole life cost (WLC) assessment of various tertiary solids removal (TSR) plants.
The FilterClear® plant was fully assembled and hydraulically tested off-site at Bluewater Bio’s works, before being transported to site for installation on a flat concrete slab.
| Project Name: | Brockhampton STW |
| Client: | Severn Trent |
| Capacity: | 105 L/s |
| Main Contractor: | CiM6 |
| Project Scope: | Design, supply & commission |
Project Highlights
• Off-site manufacture
• Consent of 0.25 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 4v2040 plant. Fully automated and instrumented tertiary filtration system for Total Phosphorus removal for the works final effluent. MCC and cabling by main contractor.
Project Duration
Award to delivery to site ~ 12 weeks
Installation time ~ 4 days
Commissioning time ~ 8 days
Client Contact
Client organisation: Severn Trent
Contact person: Jeremy Swift (MEICA Engineer)
Brockhampton STW Process Parameters
| DWF | 4,220 m3/d |
| FFT | 9,072 m3/d (82 l/s) |
| Design Influent TSS conc. (incl. allowance for chemical dosing) | 34 mg/L (average) 39 mg/L (95%ile) |
| Influent TP concentration | 1 mg/L (95%ile) |
| Effluent TP consent | 0.25 mg/L (average) |
| Effluent Fe consent | 4 mg/L (95%ile) |
