The researchers used a method called electrocoagulation to clean up wastewater from textile factories. They found that adjusting the pH, current density, and electrolysis time can help remove pollutants like COD and color. The best results were seen at 0.9 A and 0.4 A for COD and color removal, respectively. The process also made the wastewater easier to break down by bacteria. Using 0.5 A of electricity was found to be cost-effective for treating the water. The treated water had a negative impact on the oxygen levels in the sludge, so it's better to reuse it in industrial processes or follow strict disposal rules.