Efficiency Measurement of Silica In a Pressurized Sand Filter to Remove Oil and Suspended Solids from Desalting Plant Wastewater

The lack of Pressurized Sand Filters in waste water treatment of desalting plants causes some problems like plugging of injection wells, scaling in the pumping system of transfer pipe lines and waste water injection in the disposal wells. In addition to the operational and economic difficulties, waste water disposal to the environment has produced a lot of acute banal environmental impact problems. Because of the impossibility of supplying the material garnet which constituted bed of the filters these apparatuses had been out of the waste water treatment services. To rehabilitate the filters, sand particles and activated carbons were supplied from Iran's market and loaded in the filters. Then efficiency of these filters was determined for oil and suspended solids removal from wastewater. This report reflects the result. The results indicated that the performance of the new media in decreasing pollutant load were well and acceptable. The new media is capable to remove 55 percent oil and 65-70 percent solids from desalting plant waste water.