The researchers tested a method using electricity to clean water from paper mills. They used special electrodes to kill bacteria and remove sulfide and organic material. By adjusting the current and chloride levels, they found the best conditions for cleaning the water. The method was effective in killing bacteria and reducing sulfide, but not as good at removing organic material. The electrodes created chlorine to kill bacteria, and the process could also break down harmful substances. This method shows promise for improving water quality in paper mills.