The Avenue, Chesterfield’s former coking works, gets a facelift
To restore the seriously polluted site of a former coking works to its natural condition
To help the local authorities to achieve their ecological ambitions
SUEZ bore in mind one of the key goals of the project, which was to deliver a restored landscape to the local community. To this end, the short-term environmental nuisances due to the sanitation and restoration works had to be kept to a minimum.
For this reason, off-site treatment was quickly abandoned in favour of an on-site solution, designed specifically for the site and in view of all the environmental imperatives. Tests in our fixed unit in Rotterdam had shown that these contaminants - acidic and basic tars, organic and inorganic compounds - could be processed on the spot by thermal treatment.
SUEZ engineered a sophisticated thermal desorption unit.
This facility uses a high-temperature process (500°C) based on the optimal use of the energy of the organic contaminants contained in the earth to be treated. It can treat 25 tonnes of polluted material per hour. It meets both:
- the criteria for the reuse of the materials,
- the standards of the Pollution Prevention and Control Act (PPC) in force in England,
- the European limits on atmospheric emissions.
Protecting the safety of the operations staff
In this constrained industrial environment, every risk was analysed in an effort to guarantee industrial safety and to protect the health and safety of the personnel. Stringent protective measures were taken:
- Suitable personal protective equipment
- Photoionisation detectors for every member of staff; on-site dust and chemicals detectors
- Regular meetings to maintain a high level of awareness of safety
During this period, more than 400,000 tonnes of sludge and highly contaminated soil were treated. The restored site will be delivered in 2017.