**4. Conclusions**


**Author Contributions:** Conceptualization, Z.W. and W.Z.; methodology, Z.W., W.Z. and J.F.; software, Z.W. and W.Z.; validation, Z.W., W.Z., J.F. and H.X.; formal analysis, Z.W. and W.Z.; investigation, Z.W., W.Z., J.F. and H.X.; data curation, Z.W., W.Z. and J.F.; writing—original draft preparation, Z.W., W.Z. and J.F.; writing—review and editing, J.F, Y.Z. and M.C.; visualization, Z.W., Y.Z. and M.C.; supervision, Y.Z. and M.C.; funding acquisition, M.C. All authors have read and agreed to the published version of the manuscript.

**Funding:** This work was financially supported by the National Natural Science Foundation of China (Grant No. 51505242) and the Innovative Research Group of Agricultural Production Waste Resource Utilization Equipment.

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

**Data Availability Statement:** Data are contained within the article.

**Acknowledgments:** The authors thank the editor and anonymous reviewers for providing helpful suggestions for improving the quality of this manuscript.

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