The deodorization system of Wenzhou Central Area Sewage Treatment Plant adopted biofiltration deodorization technology.After being treated by the biofiltration deodorization equipment,the concentration of emitted gas could meet the requirement of the Emission Standards for Odor Pollutants(GB 14554-93).The deodorization effect was remarkable,and the odor pollution in Wenzhou Central Area Sewage Treatment Plant was solved.