الفهرس 
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Abstract
ABSTRACT
This study to assess its potential for removal of oil from oily wastewater by using two methods, the first method is electrocoagulation method using an electrolytic cell with horizontal and vertical Al/Fe electrodes and the second one is adsorption technique in which different adsorbents are used.
The first method of the separation process of oil from oily wastewater by electrolysis was studied and the effects of electrolytic time, anode tubes diameters (the used anodes were like an array), current density, electrode spacing and electrodes material (aluminum and iron) on the removal rate of the oil in the wastewater were investigated. The orthogonal tests showed that electrolytic time was the most notable factor affecting the oil remov~ rate of the wastewater. The test carried out under the conditions that current density was 0.01 Alcm2, electrolytic time was 30 minutes, and electrode spacing was 3 cm. The removal efficiency of oil exceeded 93% for all wastewaters tested.
In the second method different adsorbents (BoniFiber, Organoclay, Walnut Shell and Activated Carbon) were used to assess its potential for the removal of oil from oily wastewater. The results showed that Boni Fiber is the best adsorbent. The kinetic studies showed that equilibrium time was reached within 1 to 2 hours of contact time. The isotherm studies showed that the adsorption of oily wastewater can well be described and fitted by the Langmuir, Freundlich, and Redlich- Peterson models. The efficiency of the removal of oil from oily wastewater arranged between 96 to 98% depending on the adsorbent.
The adsorption of oily wastewater onto Walnut Shell, OrganoClay and BoniFiber in a fixed-bed column has been studied. The effects of process variables such as flow rate, bed height and percentage breakthrough have been investigated. The results have been used to predict the effect of parameter changes on the system by using the Bed Depth Service Time (BDST) approach. After obtaining the BDST results, the system variables can further be optimized based on the adsorbent exhaustion rate and the Empty Bed Residence Time ’(BBRT). The correlations for operating lines of the EBRT plot have been proposed and tested on three adsorbents adsorption system.
K.eyword: electrocoagulation, adsorption, oily wastewater, fixed bed optimization.