Biological waste such as food, organic or other biologically-derived waste is converted into shelf-stable and health-safe invertebrate feed. The method for converting includes pre-treating waste by fragmenting, reducing microbial contaminants, optionally amending with components that optimize fermentation, inoculating with microorganisms and mixing. Fermentation takes place in a bioreactor and produces fermentation leachate and solid fermentate. In the post-treatment steps, the solid fermentate is separated from the fermentation leachate. The solid fermentate is ground, dewatered and milled. The solid fermentate can be used as an invertebrate feed with or without further processing.