Application of Composting to Olive Mill Wastewater Treatment

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Abstract
The evaporative capacity of an intensive composting process was employed to treat olive mill wastewater. A mixture of extracted olive press cake and olive tree leaves was used as the solid substrate for composting. The olive mill wastewater was added to the composting mass to replenish the water loss during processing in a pilot-scale topless static container reactor. The salinity content of the compost was the factor restricting the treatment of olive mill wastewater by the process. The rate of olive mill wastewater treatment achieved in this study was 2.1 1/kg starting solid substrate (dry weight -d.w.). The cumulative moisture and volatile solids content reduction during the temperature-induced aeration period of the process was 19 and 45%, respectively.

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