Gas analysis specialist Servomex has used its oxygen analyser technology to help support an initiative to restore depleted oxygen levels in the Thames River, London.
Oxygen levels have been monitored by vessels – the Thames Bubbler and Vitality – equipped with the SERVOTOUGH Oxy 1800 (Oxy 1800). The 50m long vessels are capable of each injecting 30 tonnes of oxygen into the river every day and cost around £250,000 per year to run.
Oxygen levels in the river are susceptible to depletion following periods of heavy rainfall, which cause storm overflows resulting in millions of tonnes of diluted sewage entering the river.
Known as an acute oxygen ‘sag’, the polluting load can cause oxygen levels to fall to near zero. In 2004, the Thames received around 600,000 tonnes of untreated sewage and urban following torrential storms, causing the deaths of thousands of fish in a single day.
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