A new method was developed to clean up oilfield wastewater using a combination of micro-electrolysis, Fenton oxidation, and coagulation. By using these processes, the researchers were able to remove a large amount of organic pollutants from the wastewater. The best results were achieved when the wastewater was treated with micro-electrolysis first, followed by Fenton oxidation and then coagulation. This three-step process reduced the organic pollutants in the wastewater by over 85%, meeting the national wastewater discharge standards for the petrochemical industry in China. The researchers found that micro-electrolysis was the most effective step in removing pollutants, followed by Fenton oxidation and then coagulation. Overall, the combined process was very successful in cleaning up the oilfield wastewater.