Spray tower use biological deodorization method refers to a method that uses the metabolic activities of microorganisms to degrade odor substances and oxidize them into final products, so as to achieve odorless and harmless. The biological deodorization system is more similar to the natural process, usually carried out at room temperature and pressure, and only needs to consume the power cost of making the odorant contact with the microorganism and a small amount of the cost of regulating the nutritional environment. This method is an environmentally friendly purification technology, which is embodied in: low overall energy consumption and less operation and maintenance costs.