| 91,000 tonnes DS/year |
Doubling of capacity of existing 8 x 7400 m³ digesters
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4x5 reactor Cambi THP + cooler system
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10 MW electricity + THP steam
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Pasteurized product
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Reduced energy for drying and incineration
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Carbon emissions reduced by 32,000t CO2 equivalents/year
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High performance digestion
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High dry solids final product
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Maximized VS reduction
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One of the UK’s largest wastewater treatment works (WwTW) is set to become a valuable source of
renewable energy. The benefits of a major upgrade at Davyhulme WwTW in Manchester include the
generation of up to 10 megawatts of electricity, 24 hours per day, from biogas.
In addition the plant will process biosolids that can be applied to land as fertilizer as a sustainable
soil improvier or a feedstock to the Mersey Valley Sludge Processing Centre.
The renewable energy source provided by the new installation at Davyhulme will contribute towards
the UK’s target of 15 percent of all energy supplied by the National Grid coming from renewable
sources by 2020.
The thermal hydrolysis plant will increase capacity of existing digesters by nearly two and half times.
This will allow United Utilities to import and treat sludge from other treatment plants in north-west England
and avoid building a planned new incinerator near Preston.
Davyhulme WwTW has been in operation since 1894 and serves a population equivalent of 1.2 million for
sewage treatment in and around the city of Manchester. The digestion plant will serve a population equivalent
of 3 million people.
The benefits of the Cambi process are:
• Nearly 2.5 times increase in digester capacity
• Avoiding new incineration
• Cost savings in reduction of energy consumption for drying and incineration
• Green electricity production
• 32,000 t C
