Nutrient and biochar production using high moisture feedstock and black soldier flies

A closed-loop method for the continuous production of biochar and nutrients, the method comprising:

• placing high-moisture content feedstock and a source of black soldier flies within at least one breeding room to produce young black soldier fly larvae (BSFL);
• placing high-moisture content feedstock and a first portion of the young BSFL within at least one growing room to produce leachate, mature BSFL, and frass;
• removing the leachate from the at least one growing room and removing the mature BSFL and frass from the at least one growing room;
• separating the mature BSFL from the frass;
• processing the mature BSFL to produce dried BSFL, BSFL oil, BSFL meal, BSFL puree, or a combination thereof;
• and
• processing a first portion of the frass through a pyrolysis process to produce biochar and heat;
• wherein the biochar can be utilized within the feedstock, within a second portion of the frass to be utilized as a frass end product, as a biochar end product, or a combination thereof;
• and wherein the heat can be utilized to heat the at least one breeding room, to heat the at least one growing room, to process the frass, or a combination thereof.