Water Active Ltd

Innovative system reduces ammonia at Hawick Sewage Treatment Works

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Courtesy of Water Active Ltd

Hawick Treatment Works has reduced its ammonia discharge thanks to an innovative aeration system installed by market leaders Suprafilt.

Aeration experts Suprafilt designed a highly efficient system using MF1100 plate diffusers, which increased the amount of oxygen to the site providing an instantaneous reduction in ammonia levels.

The company, who are market leaders in designing and manufacturing of energy efficient fine bubble diffused aeration solutions, was brought on board by Carillion Construction Limited, a Scottish Waters Framework contractor.

Jonathan Lord, Contracts Director at Suprafilt, says: “We were initially brought on by Carillion to find the most cost effective solution to renew their existing aeration system.

“Once we had decided on the long lasting and efficient MF 1100 plate diffusers, we installed them in three activated sludge lanes. The increase in the amount of oxygen being pumped into the lanes brought the demand back within the capacity of the existing blowers, which were previously running at their limit. Naturally the increase in oxygen provided an instantaneous reduction in the amount of ammonia.

“The work was phased over a period of weeks and temporary aerators were provided on hire by Suprafilt to ensure that the process performance was maintained during the works.”

Steven McCulloch, Carillion Plc Site Manager at Hawick Treatment Works, says: “The installation of the new aeration system went smoothly from start to finish and had an instantaneous effect with regards to reducing the ammonia levels within the works, which is particularly great.

“I found Suprafilt to be professional, reliable and willing to push the job on with any assistance that they could provide.”

Suprafilt works with some of the UK’s major water companies and leading industrial organisations such as Seven Trent Water, Thames Water and Diageo andspecialise in the design, installation and commissioning of both fixed and lift-out fine-bubble diffused aeration systems for municipal and industrial sewage treatment plants. The company is committed to helping organisations improve their energy efficiencies and works in partnership with Universities, independent research institutions and technical and process experts to remain at the leading edge of technology in this field.

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