In this study, researchers looked into using a special fungus called Coriolus versicolor to clean up dirty water from paper mills. They found that the fungus produces a useful enzyme called laccase when the environment is just right. By tweaking some conditions while growing the fungus, like adjusting the pH and adding certain substances, they made the fungus produce more laccase. The fungus grew into small pellets that could be reused multiple times without losing effectiveness. When they used the fungus and a bit of another substance to clean the dirty water, they managed to remove 90% of the color from the water in just 24 hours, showing that this method can be very effective for cleaning up polluted water.