**6. Conclusion**

Thus, the problem of the valorisation of the various organic residues, principally of the municipal wastes and olive mill wastewater, is currently worldwide worrying, and it is specially posed in terms of environmental preservation. The choice of the treatment technique must not be only from the point of view of monetary profitability, but above all must consider the efficiency of the treatment process. It is not possible to develop all the techniques currently being tested. Composting appeared as the main pathways for remediating this high and gigantic tonnage of wastes daily generated by modern societies. The processes of composting described above appeared very simple to be implemented, not expensive, and especially gave a finished product of good quality on average, but very consuming in space and in time. At last, I could clearly see that this kind of process might go well with an implantation especially in developing countries with a sunny and warm climate. The amendment of agricultural soil with organic matter is made very urgent by the flagrant lack of its substances on the market and the same demand for fertilisers from the increasingly demanding crops. Soil and the various bio-physico-chemical and especially biological processes of degradation and humification prevailing in the soil contribute intensively and could help in the solution of this thorny problem of accumulation of all organic residues in modern societies.

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**Author details**

Monastir, Tunisia

Park, Soliman, Tunisia

Tunisia

and Abdennaceur Hassen3

\*, Bilel Hassen2

, Rim Werhani3

1 Research Unit of Analysis and Process Applied to the Environmental (APAE), Higher Institute of Applied Sciences and Technology Mahdia, University of

2 University of Tunis El Manar, Institute for Veterinary Research of Tunisia, Tunis,

© 2021 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium,

3 Water Research and Technology Center (C.E.R.T. E), Borj-Cédria Technology

4 Laboratory of Integrated Olive Production (LR16IO3), Sousse, Tunisia

\*Address all correspondence to: hassen.wafa@gmail.com

provided the original work is properly cited.

, Yassine Hidri4

Wafa Hassen1

*Co-Composting of Various Residual Organic Waste and Olive Mill Wastewater for Organic Soil…*

*DOI: http://dx.doi.org/10.5772/intechopen.97050*

*Co-Composting of Various Residual Organic Waste and Olive Mill Wastewater for Organic Soil… DOI: http://dx.doi.org/10.5772/intechopen.97050*
