skip to main content
Original Article

Agricultural valorization of composts produced by recycling organic waste



Purpose This paper investigates the composting recovery of different bio-wastes and the use of the composts produced as soil fertilizer and organic amendment.
Method A composting process was carried out for 111 days using different organic wastes (fruits, vegetables, olive pomace, poultry, and cattle manure). The physicochemical properties of the generated compost were determined. The quality of the compost produced was evaluated by measuring pH, carbon/nitrogen (C/N), dry matter, and organic matter. A phytotoxicity test (germination test) was conducted to complete the analysis.
Results The results of the physicochemical properties complied with AFNOR standards. The pH ranged between 7.3 and 8.7. The C/N ratio was between 10.05 and 18.46, and organic matter content varied between 33.6 and 72.7%. The phytotoxicity test showed that the safety of compost as a soil amendment is related to the applied dose and the type of crop.
Conclusion The physicochemical parameters and phytotoxicity test showed that the compost obtained can be used as organic fertilizer due to its organic matter content and mineral elements.


  • The volume of the pile had an influence on the temperature values: in large piles, the large masses of decomposing waste hindered the removal of the heat resulting from the microbial activity, due to the higher temperatures compared to the smaller piles.
  • The germination rate was also related to the dose of compost applied and to the type of crop, and not only to the physico-chemical characteristics of the compost.
  • The agronomic value of the composts obtained (content of fertilizer elements and organic matter) was dependent strongly on the nature of the composted waste.

Graphical Abstract


Main Subjects