The development of odor-control technology currently used in domestic and overseas was reviewed in this paper, various technique used to control the odor gases generated from municipal wastewater treatment plants were introduced, and the advantages and disadvantages of each present method of removal technology were compared. The compared result indicated that water washing and spewing was easy to do but had low removal rate. The method of chemical absorbing and active carbon can remove most of the odors, but the expense is also very high. Biotechnology was economical and effective. It can keep high removal rate with no secondary contamination and will be extensive applied in the ordor treatment of municipal wastewater treatment plants in future.
