Coagulation: An Electrochemical Process

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1. Introduction Electrocoagulation is a electrochemical process in which floc of metallic hydroxides are generated within the effluent, which to be treated, by electrodissolution of anodes. Compared with flocculation process and chemical coagulation, electrocoagulation (EC) has no of advantages, such as removal of the smallest colloidal particles. Compare to conventional coagulation process, Less amount of sludge is generated during EC process. Excessively addition of coagulants can be avoided by using EC, due to the generation of the coagulants by electro oxidation of a sacrificial anode. EC has easy operation and simple equipment. The most common electrode materials used for EC are aluminum and iron. They are readily available, economical, very effective. When aluminum is used as electrode material, the reactions…show more content…
EC treatment of oil wastewater samples has been tested on a laboratory scale and good removal of COD, color, turbidity and dissolved solids at varying operating conditions were obtained. 2. Materials and methods: 2.1 Experimental equipment: An electrochemical reactor shown in figure, having 500 ml with a speed of agitation of 200 rpm with aluminum electrodes in series arrangement connected to a DC power supply ( 1.5 Amp & 6 Volt ) was used to carry out the experiments. The total 4 no of electrodes are used. The % removals of Chemical Oxidation Demand (COD) were calculated by changing different parameters: pH, electrode gap and operation time. 2.2Materials: Sample for experiment were collected from ABC Barings Ltd. Oily Wastewater generated in Heat Section of

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