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ISHS Acta Horticulturae 1280: XXX International Horticultural Congress IHC2018: International Symposium on Nuts and Mediterranean Climate Fruits, Carob and X International Symposium on Temperate Fruits in the Tropics and Subtropics

Possibility of evaluation of two phase olive mill pomace by composting in Turkey

Authors:   N. Varol, H. Karaman, E. Aydoğdu, K. Ekinci, A. Coşkan, İ. Tosun
Keywords:   Olea europaea, organic farming, composting, olive mill waste water, olive pomace, organic manure
DOI:   10.17660/ActaHortic.2020.1280.7
Vast amount of olive mill waste exists due to olive oil production season (November-February). The inability to evaluate the olive mill waste water and discharge it to the water resources creates high pollution environment. The conversion of the olive oil mills system to the two-phase system is regarded as a solution for reducing environmental pollution. In this study, two-phase olive mill pomace was composted with separated dairy manure, poultry manure, and straw using aerated static pile composting methods for evaluation in organic farming. Active aeration was applied to the compost piles to shorten the composting period and to improve compost quality. During composting, the temperature was periodically measured at different depths of the composting piles. Composting piles were monitored for moisture, pH, electrical conductivity (EC), water soluble carbon and microbiological enzymes at periodical intervals. Aerated static pile composting method was used for composting of olive oil production wastes. Rutgers aeration strategies were performed for aeration of piles. At the later stages, 0.38 kg cotton seed meal per dry matter of initial compost was added to each compost pile for enrichment of composts at 330 days of composting (maturation and stabilization stages). Additionally, 016 kg of rock phosphate and 0.02 kg of potassium salt per dry matter of initial compost was added to each compost pile for enrichment of composts at 360 days of composting. Phytotoxic analysis was carried out at the end of composting.

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