With the continuous increase of urban domestic sewage and production wastewater discharge, the odourtreatment has been enhanced in the sewage treatment process. At present, the odour problem of wastewatertreatment plant should be treated jointly by various technologies. In this paper, the biological process andoxidation process were mainly selected to study the odour treatment in wastewater treatment plants, and twosets of pilot equipment in biological process and oxidation process respectively were established for pilot test.The test results showed that the biological process has a very good effect on treating the odour in the sewagetanks, and the treatment effect of N2 and H2S is relatively stable; the “alkali absorption + oxidation” methodproduces a stable effect on treating the odour gas produced by other adjusting tanks. At pH of 7.5-9, thepotential of 700-850, and the liquid-gas ratio between 4.7L/m~3-6.0L/m~3, the best treatment effect can beachieved on the H_2S.
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