Process for the manufacture of a biostimulant or natural fertilizer based on fermented macroalgae, natural additives and probiotic bacteria for agriculture and horticulture

A method for the manufacture of a biostimulant or natural fertilizer based on the fermentation of algae, the algae being a formulation comprising Saccharina longicruris, Fucus vesiculosus, Ascophyllum nodosum, Chondrus crispus and Furcellaria lumbricalis, the method comprising:

• harvesting, washing, drying and grinding of seaweed;
• micronizating the dried seaweed;
• homogeneously mixing the seaweed in an aqueous solution;
• preactivating bacterial spores;
• adding the preactivated bacterial spores to the aqueous solution and allowing the solution to ferment under aerobic conditions;
• adding organic additives to the aqueous solution following aerobic fermentation to create a post-fermentation solution;
• and
• separating the components of the fermented solution in one or more separation steps.

A process for the manufacture of a biostimulant comprising:

• micronizing a macroalgae mixture at 10 to 30 μm, the macroalgae mixture comprising Saccharina longicruris, Fucus vesiculosus, Ascophyllum nodosum, Chondrus crispus and Furcellaria lumbricalis;
• homogeneously mixing the micronized macroalgae mixture in an aqueous solution;
• adding preactivated spores of Bacillus sp bacterial consortium to the mixed aqueous solution;
• and
• allowing aerobic fermentation of the aqueous solution mixed with micronized macroalgae and comprising the preactivated spores.