**4. Conclusions**

*Aspergillus oryzae* is a fungal strain widely exploited as an amylase producer. In this work, we aimed to study and test this fungus for the bioremediation of starch in industrial paper mill wastewater. For this purpose, submerged fermentation technologies (SmF) and solid-state fermentation (SSF) were studied. *A. oryzae* was found to grow on nonconventional media such as the paper mill wastewater. The SSF of *A. oryzae* was performed on rice hulls. In the bioremediation (as pretreatment) of paper mill wastewater, to remove starch, the fungus maintains its amylase activity and uses reducing sugars as metabolic substrates. This study opens new perspectives for the bioremediation of industrial effluents such as pulp-and-paper mill wastewater using *A. oryzae*.

**Author Contributions:** Conceptualization, S.C. and E.T.; methodology, S.C.; validation, S.C., E.T. and R.B.; investigation, S.C., F.Z. and D.S.; writing—original draft preparation, F.Z. and E.T.; writing review and editing, F.Z. and E.T. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research article was funded by FLAG 2019.

**Institutional Review Board Statement:** Not applicable.

**Informed Consent Statement:** Not applicable.

**Conflicts of Interest:** The authors declare no conflict of interest.
