Stanbridgeford STW

In order to solve a potential ammonia issue at Stanbridgeford Sewage Treatment Works (STW), Barhale’s team with Anglian Water’s IOS programme have installed a new biological tertiary treatment plant to remove additional ammonia.

The new plant consisted of:
• 12 no. SAF units which were constructed off site
• 2 no. 7.5kw feed pumps and 2 no. 11 kw blowers
• A new MCC kiosk and PLC which were constructed off site
• Utilising the existing feed well and drying bed slab

In their component parts, the elements are fairly standard pieces of equipment which can be found on sewerage works around the country. The way in which the Barhale team have brought the pieces of the plant together however, and some of the specific nuances of the design, has made the solution particularly innovative.

Silverstone Booster Pumping Station

As part of Anglian Water’s Integrated Operational Solutions (IOS) programme, Barhale have delivered a new Booster Pumping Station in Silverstone, Northamptonshire. This is to help meet the increased demand in water supply that occurs intermittently throughout the year when events are held at the nearby race circuit.

This is especially important during the British Grand Prix weekend in July. Each year the drastic increase in water demand puts a tremendous strain on the existing water network. This is caused by nearly 400,000 members of the public who visit the circuit over the three days and the many thousands more who camp in the surrounding areas in the week leading up to the event.

London Sustainable Industries Park

Barhale have successfully completed a £1.38m design and build
contract for the Greater London Authority (GLA) at Dagenham
Dock in East London. As part of a regeneration scheme for unused
industrial land, the GLA are selling serviced plots of land within the
Mayor of London’s first clean technology commercial park.

An important part of the regeneration required upgrading the
local sewerage infrastructure. Along with our design partner, GHA
Livigunn, Barhale were engaged to design and construct a 6m
diameter x 14m deep, segmental caisson pumping station, including
associated MEICA installations with two 66 l/sec pumps.

Roydon Water Treatment Works

This contract consisted of the construction of a new Rapid Gravity Filter structure and associated ancillary plant, to provide improved treatment of potable water supplies which suffer from high concentrations of Iron and Manganese. The existing plant was fed from two local boreholes but was restricted in output, due to the water quality issues. The new works will allow the plant to address both these issues.

Barhale were responsible for the overall design and construction of the works, taking the concept design from the client and developing the entire (MEICA) detailed design. Barhale’s in house design team were responsible for the overall design management, providing the design for the main civil structures, pipelines, duct arrangements, hard and soft landscaping and security upgrades.

Ashford WWTW Extension Project

As part of Southern Water’s £1.8 billion AMP 5 programme, Barhale undertook a £12m design and construct upgrade to Ashford Treatment Wastewater Works, enhancing capacity to allow for population growth in the area under our Barhale Trant Utilities (BTU) JV.

Through our corporate design and construction procedures, Barhale, working in collaboration with our design delivery partner URS and Southern Water, established a series of design workshops to ascertain the exact objectives and milestones the project would need to deliver. The challenges that all project stakeholders faced on the Ashford project was the limited as built design and assets information for the existing site.

Canterbury WWTW Digester Refurbishment and Upgrade

Canterbury WWTW serves a population of 73,394 and has four digester tanks, each with a capacity of 1500m3 sludge, at approx.12.8m dia. x 11.9m. As part of Southern Water’s AMP6 upgrade works, Barhale were contracted to fully refurbish and upgrade two of these digesters.

The works included purging the digesters out of service; draining down and cleaning the digesters; carrying out necessary surveys and ensuing repairs; replacing the old gas mixing system with a new chopper pump system and all associated pipe-work; installing new temperature probes; testing & commissioning and conducting a 28 days reliability test.

The works took place in an extremely challenging working environment that presented some of the highest risks within the industry.

Canterbury WWTW Aeration Refurbishment and Upgrade

As part of Southern Water’s AMP6 upgrade works, Barhale were
contracted to refurbish the aeration system at Canterbury Waste
Water Treatment Works (WWTW). The works included replacing 7
aeration blowers dating from 1998 with 75kW rotary lobe blowers
which are complementary to new diffusers and the air main. Barhale
also installed new blower and aeration control and instrumentation
systems. These included high and low discharge pressure sensors and
pressure transducer with a visual display or pressure gauge.

The works entailed significant constraints. For example, the blowers
needed to be replaced without stopping the process of the WWTW
and the full works had to stay within consents agreed with the
Environment Agency by Southern Water.