Lagoons are widely used in rural area for wastewater treatment; however, the odor problem has
hampered its application. The root of odor emission from lagoons varies from one to another. The key of
controlling the odor is to find out the cause and accordingly provide strategies. Various physical,
chemical, and biological methods have been reported and applied for odor control. Physical technologies
such as masking, capturing and sorption are often employed to mitigate the pressure from compliant
while not to cut off the problem. Chemical technologies which act rapidly and efficiently in odor control,
utilize chemicals to damage the odorant production root or convert odorant to odorless substances.
Biological methods such as aeration, biocover and biofiltration control the odor by enhancing aerobic
condition or developing methanogens in lagoon, and biologically decomposing the odorants. Comparing
to physical and chemical methods, biological methods are more feasible.