Imola Tremonti selection, biostabilisation and recovery plant

Description of the operating cycle

• treatment of municipal solid waste;
• stabilisation of the organic fraction deriving from on-site mechanical selection of unseparated waste or from third-party MSW mechanical selection plants.

MSW treatment lines: 2 (Capacity: 25 tonnes/hour each)
The incoming unseparated waste is unloaded into trenches capable of storing approximately 3,000 m³ of material. After elimination of any bulky fractions, the waste is sent to the automatic selection plant where, through grinding, screening and deferrisation operations, three homogeneous fractions are separated:

• dry fraction (oversieve) sent to the non-reusable fraction management zone;
• decomposable fraction (undersieve) sent to the biostabilisation tank;
• ferrous fraction.

Biostabiliser
The undersieve from the two lines is collected by rubber conveyor belts and sent to the oxidation section to undergo hygienisation and oxidation for the production of biostabilised material. Any organic fractions deriving from third-party plants are also delivered here.
Oxidation of the organic substances is achieved by the turning of the material, with the aid of a wheeled turning machine which acts on each successive layer of waste in the rectangular tank, and by the measured administration of air through a ventilation system designed to ensure that the process takes place in the most efficient and controllable manner.
 
Products leaving the plant
Dry fraction with a high calorific value, biostabilised material for environmental reclamation and daily covering for landfills, and ferrous materials to be sent for material recovery.