Waste gas biological purification system

The utility model provides a waste gas biological purification system, include: admission line, biological deodorization tower, the exhaust duct of gas circuit intercommunication in proper order, wherein, the admission line with the sub -unit connection of biological deodorization tower, exhaust duct with the upper portion of biological deodorization tower is connected, the biological deodorization tower includes the biological filter, biological filter upper portion is provided with a spray component, a spray component and the first liquid pipe connection that sprays, the first liquid pipeline that sprays is connected with the first liquid source that sprays, fill at the biological filter middle part has first filler, first filler surface coating has the biomembrane, the biological filterbottom is through first pipeline and sewage pipes intercommunication. The utility model discloses a waste gas biological purification system passes through gas -liquid diffusion and solid -liquid andspreads the pollutant and