TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred system: The trapezoidally shaped heap of wastes is insufflated with air through ducts having holes. The insufflation is assured by a powerful fan located behind a concrete containment wall. The heap is protected from the environment by a membrane or a cover that is fixed to the ground through a specifically designed high sealing system, e.g. Velcro tapes.Probes are used to control the regular operation of the process. The data measured by each probe are sent to a process logic controller circuit having a software that handles the parameters. The system may form percolating liquid during the initial stages of the heap treatment process. This percolating liquid is collected into septic tanks. The constant level of insufflated air prevents anaerobic situations which could result in rottenness. The high temperature variation between the outside and the inside of the heap generates chemical and physical effects by which the molecules of the most smelling compounds return to the liquid stage, providing new humidity to the heap. This favors the optimum development of the thermophile bacterial flora, essential to the bio-stabilization process. The system produces results within 15-20 days.The ducts are slightly sloping towards a connecting pipe. The trapezoidal arrangement of the material to be processed assures a homogeneous air distribution. The duct is designed using a material that provides optimum oxidation inside the heap itself. The fan assures a modular operation. It overcomes the problems connected to possible loss of load, which may occur inside the ventilation ducts. The membrane protects the heap from ultraviolet A radiation and weather conditions, making it possible to carry out wastes biostabilization in the open air. It limits the release of bad smells associated with the wastes. The probes provide control over the main process parameters, i.e. temperature, humidity, oxygen and pH. The software keeps the staff required for plant operation to a minimum.    TECHNOLOGY FOCUS - POLYMERS - Preferred Materials: The membrane is a foam comprising polytetrafluoroethylene.