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Novel computer software to monitor, control and cut the carbon footprint left by sewage works

Posted: Friday 23rd September 2016

Waste water treatment plants are ferocious energy consumers. They pump out vast amounts of greenhouse gases (GHGs) - carbon dioxide (CO2), methane and nitrous oxide and most European plants are less than 50 per cent energy efficient.

And the software, expected to be in use by December 2017, could even cut household water bills, said Brunel University London's Dr Evina Katsou.

"Finding ways to decrease GHG emissions and energy consumption in waste water treatment plants will mean cheaper and more environmentally friendly sewage purification," she said. "And the latter can decrease the bills paid by people to water utilities."

Dr Katsou is the British leader of the C-FOOT-CTRL project which is developing the software. Based in Athens, the E711,000 EU funded four year research involves scientists from UK, Greece, Spain, Germany, the US and Australia.

"It will have a significant added value for the water engineering sector," she added. "This new database and software will guide the wastewater treatment plant operators in sustainable and eco-efficient operation of their plants."

Dynamic models will simulate different processes inside the plant, while an online gas analyser logs the amount of carbon dioxide, methane and nitrous oxide emitted during biological sewage treatment. Data from the gas analyser then feeds back into the models to predict GHG emission and an online energy meter tracks energy use.

A sewage plant's carbon footprint combines GHG emitted directly from sewage treatment and GHG emitted indirectly from the energy used to power the plant. The new software will help operators reduce both types of GHG alongside its energy consumption.

"Lower energy consumption translates to lower cost for sewage purification, said Dr Katsou. "Water customers are charged for both the fresh water they use and the cost of foul water management. By decreasing the foul water treatment, cost the software tool will allow decreases in water utility bills."




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