The odor emitted by wastewater treatment plants in cities is one of the social problems that technology has been trying to solve for years. The control and management systems of this type of infrastructure have been concerned with minimizing the environmental and odorous impact of this waste, which directly affects quality of life, especially for those who live near treatment plants. Among the latest systems that biotechnology has devised there are two that are on the rise, their effectiveness having been gauged: mechanical ventilation and biofiltration.