The construction of a biofilter will reduce by more than 95% the odours of the plant, and the optical separators will enable an efficiency of 90% in the separation of plastics

Biotechnology to supress odours

The biofilter of the new Centre is ready. The new infrastructure enables the biological treatment of the air with odours. It is based in the activity of some microorganisms specifically selected to purify the air. Through biofiltration, volatile organic compounds are continuously destroyed, as well as other substances which release smells like ammonia or sulphydric acid. This technology, compared to the conventional organic treatment systems enables gas purification with greater efficiency, less concentration of final odours, and lower space requirements.

The system ensures a higher and more effective purification of 95% of odours, 98% depuration of sulphydric acid and mercaptans, and 95% purification of ammonia and amines.
All this is achieved mainly thanks to the use of a biological medium inoculated with specific microorganisms of natural origin selected (among a basis of 50 different types) by the Biotechnological Institute of Kolding, Denmark, according to each kind of application.
The improvements are completed with a system of air treatment by regenerative thermal oxidation for the air with a higher odour load.

Optic separators, the key to recover materials from waste 

This French technology equipments (Pellenc) are part of the mechanical pretreatment the waste goes through in order to separate the recoverable materials, like PET, HDPE, PAPER/CARDBOARD, bricks and mixed plastic in the mixed waste fraction.
The optic separators ensure an efficiency of more than 90% for plastic separation, and more than 85% for PAPER/CARDBOARD.

This technology enables the automatization of the process, so the workers are only there to check the amount of separated fraction. The optic separators make it possible to increase the treatment capacity and represent an improvement of the working conditions of the staff.
There are 6 optic separators: 1 for paper/cardboard and the rest for plastic and bricks. Each device has NIR (near infrared) spectrometres for the different fractions, and a group of pneumatic ejectors for the separation of the materials. 

With the implementation of these equipment, it is expected to recover from the mixed waste fraction: 

Paper/cardboard: 13,600 tons/year
PET: 540 tons/year
HDPE: 330 tons/year
BRICK: 245 tons/year


 

News published on 27 May 2010