Servomex uses oxygen technology to bring the River Thames back to life | News

Oxygen levels were monitored by vessels – the Thames Bubbler and Vitality – equipped with the SERVOTOUGH Oxy 1800 (Oxy 1800). The 50m long vessels are capable of injecting 30 tonnes of oxygen each into the river each day and cost around £250,000 a year to operate.

Oxygen levels in the river are prone to depletion after periods of heavy rain, which cause storm overflows resulting in millions of tons of diluted sewage entering the river.

Known as acute oxygen ‘sagging’, the pollutant load can cause oxygen levels to drop to near zero. In 2004, the Thames received around 600,000 tonnes of untreated and urban sewage from torrential storms, causing the death of thousands of fish in a single day.

The Oxy 1800 helps monitor dissolved oxygen levels, allowing vessels to prioritize oxygen supplementation to areas that need it most. Although the oxygen content of the water can fluctuate according to natural cycles, anthropogenic causes can have a significant impact on the number of fish in the tidal Thames, in addition to affecting predator-prey relationships.

With less than 45% dissolved oxygen which could lead to fewer fish, parts of the river had been declared “biologically dead” in 1957 by scientists at the Museum of Natural History due to increased levels of pollution in the river. ‘estuary.

A recent report by the Zoological Society of London (ZSL) found that boats and oxygen technology have played a key role in restoring the river to a now abundant life.

The tidal Thames is now home to various mammals and birds, including gray seal, harbor seal, avocet and redhorse.

Considered an important spawning ground for European smelt, the river also contains over 120 species of fish.

Commenting on the biodiversity of the river, Graeme Watson, Field Service Engineer, Servomex, said: “Seeing the biodiversity it is clear that the river is in very good condition and the Environment Agency is doing a job spectacular to allow this life to thrive.”

“We are proud to be able to support this very important ongoing project with our app.”

Equipped with the ability to measure up to 100% oxygen in many industrial applications, the analyzer is considered an indispensable part of rejuvenating aquatic life.

“Being able to quickly and accurately measure the amount of oxygen in river water is critical to being able to position oxygenation vessels in the correct position,” said Neil Dunlop, Quality Technical Specialist at the water, Environment Agency.

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