Effect of solid-state fermentation by a novel soft-rot fungus Cheatomium globosum IMA1 on the anaerobic co-digestion performances of waste activated sludge and municipal solid waste

[Display omitted] •Fungal pretreatment of the whole fraction of municipal solid waste by a novel soft rot fungi Chaetomium globosum IMA1.•Methane yield increased with ligninocellulosic complex degradation by Solid state fermentation with 0.62 L/gVSremoved and 71% of CH4.•Early microbial monitoring shows Bacteria dominance (70%) with mainly HABs (50%). After stabilization, Archaea dominates (84%) with 51% of AUMs.•Positive energy balance with a recovery of 19.6 kJ/gTS.