The objective of this study was to evaluate different rehydration methods (water vs. industrial tomato waste, ITW) and additives in the ensiling of ground maize grain in terms of losses and fermentation profile, chemical composition, digestibility and ruminal degradability. The experiment was carried out at the State University of Montes Claros, and included five treatments: 1) maize silage rehydrated with water without additives, 2) maize silage rehydrated with ITW without additives, 3) maize silage rehydrated with ITW and bacterialenzymatic inoculant, 4) maize silage rehydrated with ITW and 2% molasses powder, and 5) maize silage rehydrated with ITW, bacterial-enzymatic inoculant, and 2% molasses powder, on a natural matter basis. A completely randomised experimental design with five treatments and seven replicates was applied. Polyvinyl chloride silos were used to incubate the ensiled mass, and they were opened after 72 days. A higher (P < 0.01) pH value was observed in maize silages rehydrated with ITW (mean 4.25), while greater losses of ammoniacal nitrogen were observed in maize silages rehydrated with water compared to those with ITW. Among the additives, silages rehydrated with ITW and bacterialenzymatic inoculant showed reduced effluent losses. Additionally, silages rehydrated with ITW and inoculant showed higher concentrations of acetic acid (P < 0.01), and propionic acid (P < 0.01). ITW can be used for rehydration of ground maize grain and ensiling because it does not alter dry matter losses and improves the levels of nitrogenous compounds in the silage.