The odorous gases such as H2S and ammonia generated by the biochemical pool of the sewage pretreatment plant of Yancheng Fuhui Textile Co., Ltd. are collected and treated by biological deodorization technology.

The biological treatment of waste gas utilizes the characteristics of nutrients required in the metabolism of microorganisms, and converts harmful substances in exhaust gas into simple inorganic substances such as carbon dioxide, water, and cellular substances. Biological treatment does not require regeneration and other advanced treatment processes. Compared with other purification methods, it has the advantages of simple equipment, low energy consumption, safety and reliability, and no secondary pollution.