In-situ biostimulation of the hydrolysis of organic matter for optimizing the energy recovery therefrom

A process for the treatment of a first, at least partially organic and at least partially solid, substrate, comprising:

• A. introduction of an initial volume of said first substrate to be treated into at least one hydrolysis reactor;
• B. introduction of an initial volume of second substrate into at least one biostimulation reactor;
• C. biostimulation of the second substrate contained in said biostimulation reactor, under aerobic conditions, at a temperature of between 20° C. and 40° C., a pH of between 4 and 7, a moisture level of between 50% and 80% and a residence time of between 1 and 5 days, to ensure at least partial hydrolysis of the organic portion (11) of said substrate and the in situ production of hydrolytic enzymes;
• D. percolation of a liquid through said volume of second substrate contained in said biostimulation reactor, in order to form a first leachate (5) enriched in hydrolytic enzymes (31);
• E. injection of the first leachate enriched in hydrolytic enzymes into at least one hydrolysis reactor containing said first substrate to be treated;
• and
• F. hydrolysis of the first substrate at least partially by the first enriched leachate;
• wherein the succession of the steps C and D define a biostimulation cycle.