bwb-logo-white

Codsall STW, Phosphorus Removal

Project Description

Codsall STW is located near the village of Bilbrook to the North of Wolverhampton. The works treats a FFT of 82 l/s, and comprises two secondary treatment streams: activated sludge stream and trickling filter stream. The consent limits are: TSS 40 mg/l, BOD 20 mg/l, AmmN 5 mg/l.


In AMP6, under the Water Framework Directive (WFD), the site has to meet a new total phosphorus (TP) consent of 0.5 mg/l, and Fe of 4 mg/l. To achieve these new consent standards, Severn Trent’s main contractor MMB installed a new tertiary solids removal plant with chemical dosing and mixing/flocculation.

Technical and economic assessment by MMB was made on the basis of Total life expenditure (TOTEX).


The FilterClear® skid was fully assembled and hydraulically tested off-site at Bluewater Bio’s works. Once tested and signed off the skid was transported to site for installation on a flat concrete slab.

Project Name:Codsall STW
Client:Severn Trent Water
Capacity:100 L/s
Main Contractor:Mott MacDonald Bentley
Project Scope:Design, supply
& commission

Supplementary Information

• Innovation: Utilisation of FC vessel headspace for flocculation removing the need for costly mechanical flocculation and associated operational requirements.

• DfMA: Fully assembled and tested off-site at Bluewater Bio’s works significantly reducing site and overall project durations.

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 Phosphorous removal for the works final effluent. MCC and cabling by main contractor.

Project Duration

Award to delivery to site – 12 weeks
Installation time – 2 weeks
Commissioning – 2 weeks

Client Contact

Client organisation: Severn Trent

Contact person: Kristian Roberts (Project Manager MMB)

Codsall STW Process Parameters

DWF4,000 m3/d
FFT7,085 m3/d (82 l/s)
Design Influent TSS conc.
(incl. allowance for chemical dosing)
29 mg/L (average)
40 mg/L (95%ile)
Effluent TSS5 mg/L (average)
Effluent TP target0.5 mg/L
Share the Post:

Related Case Studies

Bolsover STW Phosphorus Removal

The FilterClear installation at Bolsover forms part of the national CIP program, to ascertain the feasibility and real costs associated with achieving low (0.5 mg/L) to ultralow (0.1 mg/L) total phosphorus consents.

Read More

HYBACS Upgrade at Tsakane WwTW

Following rapid catchment growth, East Rand Water Company(ERWAT) required an upgrade from 10 MLD to 20 MLD at its Tsakane WwTW. The existing works comprised a single biological nutrient removal (BNR) reactor which could not be taken out of service for long periods of time.

Read More

Jubail HYBACS Upgrade at IWTP-8

Industrial Wastewater Treatment Plant no.8 (IWTP8) treats effluent from most of the industrial area in the city of Jubail, Saudi Arabia. The plant comprises three parallel streams; stream 2 was based on the activated sludge process and treated around 25 MLD to the Saudi RCER-1999 Irrigation Water standard.

Read More

Contact Our
NeoTech Team

Please complete the form and one of our technology team will get back in touch with you as soon as possible:

Contact Our
CFIC® Team

Please complete the form and one of our technology team will get back in touch with you as soon as possible:

Contact Our
HYBACS® Team

Please complete the form and one of our technology team will get back in touch with you as soon as possible:

Contact Our Team

Please complete the form with as much detail as possible about your project and one of our technology team will get back in touch with you as soon as possible:

Contact Our
FilterClear® Team

Please complete the form and one of our technology team will get back in touch with you as soon as possible: