A phased ANAEROBIC MANAGEMENT PROCESS SEPARATED WITH A DIGESTATE DYNAMIC RECIRCLE

摘要

The object of the present invention consists of a method for optimizing the biological production of gaseous hydrogen and volatile fatty acids (VFA) by means of the anaerobic digestion process with separate phases. This optimization is achieved by controlling the pH of the reaction medium in the fermentation reactor through the recirculation of the digestate exiting the digestion reactor. The recirculation ratio is managed by an algorithm that automatically establishes the recirculation flow rate for maintaining the pH in the fermentation reactor at a value close to the optimal one through inputs coming from probes inside the two reactors and at the same time prevents an excessive accumulation of ammonia in the system.