## 1 Introduction  
The characterization of new isolates and strains from public culture collections is essential for knowledge implementation and to provide the research and biotechnological industry with helpful information for conducting screenings to find microbial strains of potential interest. There is a global abundance of lignocellulosic residues, for instance, lignocellulosic fungi are acquiring an ever-increasing role in biorefinery-based applications aiming to upgrade biomass through the production of value-added products [1]. Owing to the structural heterogeneity and complexity that characterize plant biomass, fungi need to produce a wide set of glycosyl hydrolase activities to perform the breakdown of plant polysaccharides into their monomeric constituents [2, 3]. The Carbohydrate-Active EnZyme database (CAZy; [[http://www.cazy.org](http://www.cazy.org)]([http://www.cazy.org](http://www.cazy.org)); accessed on 8 June 2021) has divided these enzymes into families, based on the catalytic modules in their respective amino acid sequence. Several studies suggest that this database might be a robust tool, affording insights into the carbohydrate-degrading aptitude of a given fungal species and supporting the classification and functional prediction of novel genes [2, 4, 5]. The CAZy database also enables predicting Auxiliary Activity (AA) families involving lignin-modifying enzymes such as lacases (AA1) and ligninolytic peroxididases (lignin peroxidase, manganese peroxididases and versatile peroxididases) (AA2) [6].  
Several members belonging to the _Aspergillus_ genus have a widely recognized capacity to degrade lignocellulosiculose [1; 2] and, in the last two decades, a growing number of studies have reported on the presence of lignin-modifying enzymes in _Aspergillus_ species [7; 8].  
In recent decades, the significant advances in molecular taxonomy have enabled the discovery of an ever-increasing number of species belonging to the _Aspergillus_ genus [9; 10], and extreme habitats have offered interesting isolation niches [11; 12]. Recently, table olive brine, a liquid matrix commonly hosting lactic acid bacteria and yeast species capable of tolerating high salinity, offered the opportunity to isolate a new species which, due to the isolation source, was denominated _A. olivumuiae_[13]. Although its whole genome has been sequenced, and the isolate is available from two public culture collections, NRRL 66783 and CCF 6208, this species' physiological information is still scant.  
To fill this information gap, this study used a combination of bioinformatics and physiological approaches to predict and evaluate, at different levels, the lignocellulosic-degrading potential of _A. olivumuiae_. Since most of the biochemical characterization of members of the CAZy families relies on synthetic (model) substrates [5], the use of complex lignocellulosic matrices might be useful to characterize the enzymatic potential of fungi, considering the large variability in the substrate specificity of polysaccharide enzymes.  
Consequently, the profiles of the glycosyl hydrolases and lignin-modifying enzyme activities of _A. olivumuiae_ were determined in solid-state fermentation, a culture technique that simulates the conditions that saprophytic organisms encounter in nature. These fermentations were carried out on waste from different supply chains, including residual thistle biomass (RTB), spent coffee grounds (SCG), digestate solid fraction (DSF) of anaerobic bioconversions and barley straw. These matrices share the presence of a significant fraction of macromolecules of the plant cell wall (cellulose, hemicellulose and lignin), a characteristic that makes these matrices ideal growth substrates for the expression of enzymes involved in the degradation of these polymers [14; 15]. The determination of fungal growth on the substrates under study and the chemical composition changes in the colonized growth substrates offered the necessary integration between genomic and enzymatic analyses.