Articles & Case Studies

BTU upgrades odour control plant for Southern Water

Posted: Thursday 3rd November 2011

Water industry contractor BTU has completed a major £300,000 project involving the upgrading of an odour control plant at Southern Water’s East Worthing Wastewater Treatment Works in West Sussex.

The main task centred on the replacement of two large odour control wet chemical scrubbers, with the challenge of dismantling the obsolete scrubbers in situ as they were housed in a large portal frame building with restricted access.

Two newly fabricated replacement units, pictured, were then craned in sections into the building via the roof, which had to be opened up especially. This was a delicate operation - at times there were only inches to spare as the vessels were manoeuvred past internal beams and structures.

In order for BTU to guarantee an uninterrupted continuous operation, the scrubbers, which operate in parallel, were replaced one at a time, with the first new scrubber being commissioned and brought into service before the second old scrubber was decommissioned and removed.

The new scrubbers are constructed from a composite of PVC/GRP with polypropylene internal packing. They measure 3 metres in diameter and 9 metres tall and weigh approximately 5 tonnes each.

With each scrubber capable of treating over 62,000 m3/hr of odorous air, the refurbished odour control system is now operating with an efficiency of >99% H2S removal, thereby helping reduce the impact of odours in this sensitive urban location near a popular tourist location and the beach.

BTU, headquartered at Havant, near Portsmouth, was aided by ERG, an odour control specialist, based at Horsham, West Sussex.

Richard Kirk, the BTU site engineer, said: “The key factor was to ensure operational continuity, despite the physical constraints imposed by the working environment, both safely and effectively.

“This upgrade, requiring innovative solutions, is another example of our continued commitment in working with Southern Water to improve customer satisfaction, especially for local residents in the vicinity of the wastewater treatment works.”

The odour control remedial upgrade scheme undertaken by BTU is just one of a number of projects that Southern Water has driven to reduce the impact of odorous air.

In particular BTU is currently managing a £2m contract for a new odour control plant at the Horsham Waste Water Treatment Works in West Sussex.

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