Odor is air pollution, based on human olfactory perception is used as a standard. As one of the world's seven major environmental hazards, a direct threat to the social environment, the natural environment and people's mental and physical health. According to China's environmental statistics analysis, China's industry, life, municipal, malodorous emissions of motor vehicles increasing significantly each year, tough, and is closely related to smog pollution, odor nuisance phenomena are all the more serious.
Odor pollution harm to human mainly has following several aspects: harm harm harm respiratory system, circulatory system, digestive system, harm, harm the nervous system and the endocrine system affect mental state. (1) effect people of smell: nervous system in by stench gas stimulus of situation Xia, cortex regulation function disorders, over will caused smell function lost; (2) effect people of breathing: people in stench gas environment Xia will produced unconscious of control breathing behavior, long-term serious of stimulus role, eventually will led to respiratory occurred disorder; (3) stimulus people of sense views: stench gas in the exists many stimulus people sense views of gas, like ammonia and aldehyde class stench gas will on people of eyes will produced hurt; (4) Stimulation of the nervous system: the odor gases such as H2S in serious toxic effects on the nervous system and affects the circulatory, result in endocrine disorders, digestive disorders.
Become a major environmental problem of odor pollution and odor issues attracted more and more attention, the study of deodorization technology are booming, especially in bio-deodorization technology is increasingly valued.