After evaluating different scenarios using electrocoagulation to remove oil droplets from the contaminated water, the next phase of investigation has been focusing on  loaded floc separation. Loaded flocs contain not only oil but also solids in suspension, electrolysis gases and metal ions. Since the concentration of all these components in flocs is difficult to determine,  the behaviour of single flocs alone is no longer of interest. Therefore further investigation has focused on  the behaviour of the floc bed.  For separation of the floc bed different methods have been evaluated in relation to efficiency and cost effectiveness, including foot print. The design derived from the experiments has been simulated using different boundary conditions. The most promising designs  have  been integrated with the electrocoagulation unit and subjected to extensive trial. During the tests valuable inputs that were  received from the SMEs have been applied.  The latest test results have shown consistent  oil content  of 1 – 5 ppm in the cleaned water down from concentration of  several hundred ppm in the feed wastewater.  This is a significant breakthrough in the OileClear technology.

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