Presented as the Ultimate objective of any recycling system, the elaboration and design of circular system bring challenges, which can be summarized:
- by nature, potentially unstable
- require high efficiency of all subsystems
- can only be justified after a large number of successful cycles.
These leads directly to the needs of a very elaborated and detailed characterization of all processes in static, dynamic modes, in optimal and degraded modes.
Almost any circular system is based on the assembly of interacting processes.
The nature and the respective dynamics of these processes are so diverse that they cannot operate successfully in stand-alone operation without control. A deterministic control is therefore a prerequisite of robust performance.
This includes at the prime level, the triptych: (i) measurement by reliable sensors, (ii) scheme of control and (iii) regulation. The mathematical deterministic modeling and simulation of the interacting parts of the system materialize the brain-level of the system.
Since the early days, of MELiSSA project and probably due to its father origin (i.e. Claude Chipaux, a MATRA-Airbus engineer), these challenges were perceived and many efforts has been taken in these directions, they are:
- Intensive characterization all processes at the level of the main chemical elements (C, H, N, O, S, P, ...)
- Mechanistic modelling and simulation
- Predictive control law
- System engineering approach.