Production of compost for agricultural from olive-mill waste [electronic resource].

Includes references.

A pollutant solid material called "olive cake", which Is the main by-product from the olive oil industry, generated by the olive oil extraction industry is a great pollutant because of its high organic load and also because of its high content of phytotoxic and antibacterial phenolic substances, which resist biological degradation. The present work was conducted during season 2007 at the SEKEM company farms, at Bilbies, Sharkia governorate,.to study the effect of using four compost varieties (C1: 20% olive cake + 20% organic manure + 50% plant residues + 10% soil), (C2: 30% olive cake + 15% organic manure + 45% plant residues + 10% soil), and (C3: 40% olive cake + 10% organic manure + 40% plant residues + 10% soil) and (C4: 50% olive cake + 5% organic manure + 35% plant residues + 10% soil) and/or four periods ( 30, 40, 50 and 60 days) and their interaction on EC, pH, Total organic carbon %, Total nitrogen %, C I N ratio, Organic matter %, Total phosphorus %, Total potassium %, Compost temperature, Compost carbon dioxide (CO₂), Moisture content % ,phenol, cadmium, copper, zinc and lead. The results can be summarized as follows: 1- Increasing olive cake percentage in compost varieties caused a significant reduction in pH, total organic carbon %, total nitrogen %, organic matter %, total phosphorus %, total potassium % and moisture content. On the other hand, EC, temperature, carbon dioxide, total phenol, cadmium, copper, zinc and Iead increased with increasing olive cake percentage in compost varieties. 2- Increasing compost production periods from 30 to 60 days resulted in a significant increase in EC, pH, Total nitrogen %, Total phosphorus %, Total potassium % and carbon dioxide, while increasing periodsup to 60 days Gaused a reduction effect on total organic carbon, C/N ratio,organic matter %, temperature, moisture content, total phenol, lead, Cd and Zn. 3- Interaction between compost varieties and periods exerted a significant on pH, total organic carbon, C/N ratio, organic matter, temperature and carbon dioxide.

Summary in Arabic.

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