Document Type : Research Article
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Abstract
Based on limited water resources, increasing population, the need for high volume production and waste disposal, it is necessary to increase the reuse of wastewater. Artificial recharge using one of the most important methods of wastewater re-use of this resource is valuable. Necessary in order to utilization of artificial recharge system was conducted. In order to simulate the physical conditions of artificial recharge ponds PVC cylindrical column of diameter 30 cm and height of 250 cm was used. Columns filled by Sandy loam soil and Mahdasht Alborz Province treated wastewater was used for artificial recharge system in the College of Agriculture, Tehran University. Two strategies using geotextile lining and coating materials are coarse debris on the soil surface and a bare soil, water infiltration into the soil to improve the approach was evaluated in terms of permanently flooded. Values of BOD5, COD coliform, fecal coliform, nitrates and phosphorus inputs and outputs of the column effluent were measured. The results indicate the high efficiency of columns of soil, covered with geotextile, the amounts of percentage removal of BOD5, COD, coliform, fecal coliform and phosphorus, average 84/7, 77, 99/5, 99/7 and 79/9 and efficiency of all columns in the nitrate removal was low. Using geotextile cover and building materials in addition to reducing transport emissions, the use of the soil as well as the filter increases. Also due to its low cost and ease of preparation, may change or modify these materials to improve soil penetration.
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