Food waste forms a major fraction of municipal solid waste worldwide. Sustainable management of food waste (FW) is necessary to protect the environment and public health. Acidogenic fermentation is emerging biotechnology that transforms FW into high-value biochemicals such as carboxylates. Dry fermenters such as leachate bed reactors (LBRs) are better suitable for acidogenic fermentation of FW economically. However, LBRs have technical challenges including low product yield at high volumetric organic loading and long fermentation times. This study investigated the impact of various granular activated carbon (GAC) loadings and different inoculum type/enrichment methods on hydrolysis and acidogenesis of FW in LBR at high volumetric organic loading of 49 g VS/Lreactor. Enrichment of return activated sludge achieved the highest hydrolysis yield of 683 g SCOD/kgVSadded and acidification yield of 617 g CODSCFA/kg VSadded at high GAC loading of 0.51 g GAC/g VSfoodwaste.