Carbon8 helps Lakeside EfW achieve 18 months’ zero waste to landfill

Written by: Geraldine Faulkner | Published:
A Carbon8 Aggregates project

An arrangement between Carbon8 Aggregates and the Lakeside Energy from Waste (EfW) facility at Colnbrook in Berkshire, has seen the EfW facility achieve zero waste to landfill over an 18-month period and counting.

According to Grundon, It is thought to be the first time in the UK that an EfW facility has met a 100% diversion from landfill target.

Since 1 September 2015, the Lakeside facility - a joint venture between Grundon Waste Management and Viridor - has been recycling 100% of its air pollution control residues (APCr) ash which is left behind as the plant turns residual waste into sustainable energy.

Assisting in achieving the goal is Carbon8 Aggregates which uses a patented process known as accelerated carbonation technology (ACT) to transform the APCr into a lightweight aggregate called C8Aggregate (C8Agg).

Stephen Roscoe, Carbon8’s technical director, said: “Lakeside was the first EfW facility to fully adopt our technology and we believe it is now the first in the country to divert all its waste away from landfill.

“What we want to see now is more commercial operators and local authorities following Lakeside’s lead and demanding their EfW facilities adopt similar practices and stop sending APCr to landfill when there is a much more environmentally-friendly alternative.”

The alternative disposal route also means EfW operators can avoid the increasing cost of landfill tax to dispose of their APCr - a benefit that, according to Carbon8, has already been recognised by a number of other EfW operators who are also now working with the company.

The Lakeside EfW facility currently processes up to 450,000 tonnes of non-recyclable waste a year from both local businesses and local authorities, including Slough, Central Berkshire, Wiltshire and the West London Waste Authority. In doing so, it generates 37MW of power - enough it is claimed to provide electricity to every household in Slough.

The APCr is collected by specialist tankers and transported to a Carbon8 Aggregates’ facility in Suffolk or Avonmouth where it is converted into a carbon negative aggregate used in building blocks, precast and ready mixed concrete and screeds.

"As the ACT process permanently captures more carbon dioxide (CO2) than is generated during its manufacture, it means C8Agg is the world’s first truly carbon-negative aggregate," stated Roscoe before adding: "It is proving increasingly popular with the construction industry, which sees it as a more sustainable alternative to natural aggregates."

Danny Coulston, Lakeside operations director, said: "Completing the 100% diversion from landfill, Lakeside has been sending its Incinerator Bottom Ash (IBA) for reprocessing since 2010, where any metals are segregated for recycling and the remaining material is recycled for use in road-building and construction projects."


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