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International Journal of Soil Science
  Year: 2015 | Volume: 10 | Issue: 2 | Page No.: 84-92
DOI: 10.3923/ijss.2015.84.92
 
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Effect of Olive Mills Wastewater (OMWW) on Soil Thermal Conductivity

Adnan I. Khdair and Ghaida Abu-Rumman

Abstract:
Olive Mills Wastewater (OMWW) contains organic matter which can be added as soil amendment and might be highly beneficial to agricultural soils. However, the organic matter in the olive mills wastewater contains oil which might affects soil thermal conductivity, water retention and hence infiltration rate. The effect of adding Olive Mills Wastewater (OMWW) on soil thermal conductivity has been carefully investigated in the laboratory. Three soils were used and classified as sandy clay, silty clay and clay. The thermal conductivity of the soil was determined using a single probe technique. At given moisture content and bulk density, results showed that OMWW concentration had direct effect on soil thermal conductivity. For all soils tested soil thermal conductivity decrease as OMWW applied to soil samples. The decrease in soil thermal conductivity has been noticed at all levels of OMWW concentration but significantly different at 60% or higher. The thermal conductivity values were higher for sandy clay than silty clay and clayey soil at all OMWW concentrations. Thermal conductivity values between 0.89-0.70 W m-1 K-1 were obtained for sandy clay soil, between 0.77-0.63 W m-1 K-1 for silty clay soil and between 0.80-0.57 W m-1 K-1 for clay soil as OMWW concentration increased from 20-100% at water contents of 0.20 cmper3 cm-3 and bulk density of 1.25 g cm-3. Graphical and statistical comparisons of thermal conductivity obtained for the three soils used are presented.
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How to cite this article:

Adnan I. Khdair and Ghaida Abu-Rumman, 2015. Effect of Olive Mills Wastewater (OMWW) on Soil Thermal Conductivity. International Journal of Soil Science, 10: 84-92.

DOI: 10.3923/ijss.2015.84.92

URL: https://scialert.net/abstract/?doi=ijss.2015.84.92

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