Oxford STW to take Veolia’s thermal hydrolysis process 21 May 2013

Thames Water's Oxford sewage treatment works is to get a Biothelys thermal hydrolysis plant, from Veolia Water Solutions & Technologies.

The deal follows a similar contract involving this plant technology for Yorkshire Water's Esholt sewage treatment works.

The Oxford plant is due to treat 25,000 tonnes of dry solids per year – primary and secondary sludge from the Oxford works plus sludge from outlying treatment works.

The treated sludge from the thermal hydrolysis process will then be fed to the existing downstream anaerobic digesters at a much higher dry solids concentration (10–12%) compared with 5—6% for untreated sludge, so increasing throughput.

Veolia also says that using thermal hydrolysis at Oxford will substantially increase the amount of biogas produced by the anaerobic digesters, which generates green electricity via a CHP (combined heat and power) plant.

The Biothelys plant is due to go operational by March 2014

Brian Tinham

Related Companies
Veolia Water Technologies

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